BM2P054F-GE2 - ROHM SEMICONDUCTOR

Datasheet

○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays

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TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

TSZ22111・14・001

www.rohm.com

AC/DC Drivers

PWM type DC/DC converter IC

Included 650V MOSFET

BM2PXX4F Series

●General

The PWM type DC/DC converter (BM2PXX4F) for

AC/DC provide an optimum system for all products

that include an electrical outlet.

BM2PXX4F supports both isolated and non-isolated

devices, enabling simpler design of various types of

low-power electrical converters.

BM2PXX4F built in a HV starter circuit that tolerates

650V, it contributes to low-power consumption.

With current detection resistors as external devices, a

higher degree of design freedom is achieved. Since

current mode control is utilized, current is restricted in

each cycle and excellent performance is demonstrated

in bandwidth and transient response.

The switching frequency is 65 kHz. At light load, the

switching frequency is reduced and high efficiency is

achieved.

A frequency hopping function is also built, which

contributes to low EMI.

We can design easily, because BM2PXX4F includes

the switching MOSFET.

●Basic specifications

 Operating Power Supply Voltage Range:

VCC 8.9V to 26.0V DRAIN：～650V

 Operating Current: Normal Mode

BM2P054F: 0.60mA (Typ.)

BM2P094F: 0.50mA (Typ.)

Burst Mode: 0.40mA (Typ.)

 Oscillation Frequency: 65kHz (Typ.)

 Operating Temperature: - 40 oC to +105 oC

 MOSFET ON Resistance:

BM2P054F: 4.0Ω (Typ.)

BM2P094F: 8.5Ω (Typ.)

●Features

 PWM frequency : 65kHz

 PWM current mode method

 Burst operation when load is light

 Frequency reduction function

 Built-in 650V start circuit

 Built-in 650V switching MOSFET

 VCC pin under voltage protection

 VCC pin overvoltage protection

 SOURCE pin Open protection

 SOURCE pin Short protection

 SOURCE pin Leading-Edge-Blanking function

 Per-cycle over current protection circuit

 Soft start

 Secondary Over current protection circuit

●Package W (Typ.) x D (Typ.) x H (Max.)

SOP8 5.00mm x 6.20mm x 1.71mm

●Applications

AC adapters and household appliances (vacuum

cleaners, humidifiers, air cleaners, air conditioners, IH

cooking heaters, rice cookers, etc.)

●Line Up

●Application circuit

Figure 1．Application circuit

Product MOSFET ON resistor

BM2P054F

4.0Ω

BM2P094F

8.5Ω

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

●Absolute Maximum Ratings（Ta=25C）

Parameter Symbol Rating Unit Conditions

Maximum applied voltage 1 Vmax1 -0.3～30 V VCC

Maximum applied voltage 2 Vmax2 -0.3～6.5 V SOURCE, FB

Maximum applied voltage 3 V max3 650 V DRAIN

Drain current pulse I

DP 2.60 A

PW=10us, Duty cycle=1%

(BM2P054F)

Drain current pulse I

DP 1.30 A

PW=10us, Duty cycle=1%

(BM2P094F)

Allowable dissipation Pd 563 mW When implemented

Operating temperature range Topr -40 ～ +105 oC

MAX junction temperature TJMAX 150 oC

Storage temperature range Tstr -55 ～ +150 oC

(Note1) SOP8 : When mounted (on 70 mm × 70 mm, 1.6 mm thick, glass epoxy on single-layer substrate).

Reduce to 4.504 mW/C when Ta = 25C or above.

●Operating Conditions（Ta=25C）

Parameter Symbol Rating Unit Conditions

Power supply voltage range 1 VCC 8.9～26.0 V VCC pin voltage

Power supply voltage range 2 VDRAIN ～650 V DRAIN pin voltage

●Electrical Characteristics of MOSFET part (Unless otherwise noted, Ta = 25C, VCC = 15 V)

Parameter Symbol Specifications Unit Conditions

Min Typ Max

[MOSFET Block]

Between drain and

source voltage V(BR)DDS 650 - - V ID=1mA / VGS=0V

Drain leak current IDSS - - 100 uA VDS=650V / VGS=0V

On resistance RDS(ON) - 4.0 5.5 Ω ID=0.25A / VGS=10V

(BM2P054F)

On resistance RDS(ON) - 8.5 12.0 Ω ID=0.25A / VGS=10V

(BM2P094F)

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

●Electrical Characteristics of Control IC part (Unless otherwise noted, Ta = 25C, VCC = 15 V)

Parameter Symbol

Specifications Unit Conditions

Min Typ Max

[Circuit current]

Circuit current (ON) 1 ION1 410 600 790 μA BM2P054F, FB=2.0V

(at pulse operation)

Circuit current (ON) 1 ION1 350 500 650 μA BM2P094F, FB=2.0V

(at pulse operation)

Circuit current (ON) 2 ION2 - 400 500 μA FB=0.0V(at burst operation)

[VCC protection function]

VCC UVLO voltage 1 VUVLO1 12.50 13.50 14.50 V VCC rises

VCC UVLO voltage 2 VUVLO2 7.50 8.20 8.90 V VCC falls

VCC UVLO hysteresis VUVLO3 - 5.30 - V VUVLO3= VUVLO1- VUVLO2

VCC OVP voltage 1 VOVP1 26.0 27.5 29.0 V VCC rises

VCC OVP voltage 2 VOVP2 23.5 V VCC falls

Latch released VCC voltage VLATCH - VUVLO2-0.5 - V

VCC Recharge start voltage VCHG1 7.70 8.70 9.70 V

VCC Recharge stop voltage VCHG2 12.00 13.00 14.00 V

Latch mask time TLATCH 50 100 150 us

Thermal shut down temperature TSD 118 145 -

C Control IC

[PWM type DCDC driver block]

Oscillation frequency 1 FSW1 60 65 70 kHz FB=2.00V

Oscillation frequency 2 FSW2 20 25 30 kHz FB=0.40V

Frequency hopping width 1 FDEL1 - 4.0 - kHz FB=2.0V

Hopping fluctuation frequency FCH 75 125 175 Hz

Soft start time 1 TSS1 0.30 0.50 0.70 ms

Soft start time 2 TSS2 0.60 1.00 1.40 ms

Soft start time 3 TSS3 1.20 2.00 2.80 ms

Soft start time 4 TSS4 4.80 8.00 11.20 ms

Maximum duty Dmax 68.0 75.0 82.0 %

FB pin pull-up resistance RFB 23 30 37 kΩ

ΔFB / ΔCS gain Gain - 4.00 - V/V

FB burst voltage VBST 0.300 0.400 0.500 V FB falls

FB voltage of

starting Frequency reduction mode VDLT 1.100 1.250 1.400 V

FB OLP voltage 1a VFOLP1A 2.60 2.80 3.00 V Overload is detected (FB rise)

FB OLP voltage 1b VFOLP1B - 2.60 - V Overload is detected (FB drop)

FB OLP ON timer TFOLP1 40 64 88 ms

FB OLP start up timer TFOLP1b 26 32 38 ms

FB OLP OFF timer TFOLP2 358 512 666 ms

[Ove

current detection block]

Overcurrent detection voltage VCS 0.380 0.400 0.420 V Ton=0us

Overcurrent detection voltage SS1 VCS_SS1 - 0.100 - V 0[ms] ~ TSS1[ms]

Overcurrent detection voltage SS2 VCS_SS2 - 0.150 - V TSS1 [ms] ~ TSS2 [ms]

Overcurrent detection voltage SS3 VCS_SS3 - 0.200 - V TSS2 [ms] ~ TSS3[ms]

Overcurrent detection voltage SS4 VCS_SS4 - 0.300 - V TSS3 [ms] ~ TSS4 [ms]

Leading Edge Blanking Time TLEB - 250 - ns

Over current detection AC Voltage

compensation factor KCS 12 20 28 mV/us

SOURCE pin

short protection voltage VCSSHT 0.020 0.050 0.080 V

[Start circuit block]

Start current 1 ISTART1 0.100 0.500 1.000 mA VCC= 0V

Start current 2 ISTART2 1.000 3.000 6.000 mA VCC=10V

OFF current ISTART3 - 10 20 uA

Inflow current from Drain pin

after UVLO released UVLO.

When MOSFET is OFF

Start current switching voltage VSC 0.800 1.500 2.100 V

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

●PIN DESCRIPTIONS

Table 1 Pin Description

NO. Pin Name I/O Function ESD Diode

VCC GND

1 VCC I Power supply input pin - ○

2 N.C. - - - -

3 N.C. - - - -

4 DRAIN I/O MOSFET DRAIN pin - -

5 SOURCE I/O MOSFET SOURCE pin ○ ○

6 N.C. - - - -

7 GND I/O GND pin ○ -

8 FB I Feedback signal input pin - ○

●I/O Equivalent Circuit Diagram

Figure 2. I/O Equivalent Circuit Diagram

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

●Block Diagram

Figure 3. Block Diagram

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

●Description of Blocks

(1) Start circuit (DRIAN: 4pin)

This IC built in Start circuit (tolerates 650V). It enables to be low standby mode electricity and high speed starting.

After starting, consumption power is idling current ISTART3（typ=10uA） only.

Reference values of Starting time are shown in Figure-7. When Cvcc=10uF it can start less than 0.1 sec.

VCCUVLO

VCC

Cvcc

DRAIN

FUSE

Diode

Bridge

SW1

85- 265 Vac

Figure4. Block diagram of start circuit

Figure 5. Start current vs VCC voltage Figure 6. Start time (reference value)

* Start current flows from the DRAIN pin

ex) Consumption power of start circuit only when the Vac=100V

PVH＝100V*√2*10uA=1.41mW

ex) Consumption power of start circuit only when the Vac=240V

PVH＝240V*√2*10uA=3.38mW

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

0 5 10 15 20 25 30 35 40 45 50

起動時間[sec]

Cvcc[uF]

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

(2) Start sequences

(Soft start operation, light load operation, and auto recovery operation during overload protection)

Start sequences are shown in Figure 7. See the sections below for detailed descriptions.

Vout

Switcing

VCC(1pin)

FB(8pin)

Soft

Start

64ms

Iout

Normal Load

Light LOAD

Within

32ms

VCC=8.2V

Over Load

Internal REF

Pull Up

Burst mode

CDEF

GH I

Switching

stop

VCC=13.5V

FB OLP ON

Figure 7. Start sequences Timing Chart

A: Input voltage VH is applied.

B: This IC starts operation when VCC pin voltage rises and VCC > VUVLO1 (13.5 V typ).Switching function starts when other

protection functions are judged as normal. Until the secondary output voltage becomes constant level, VCC voltage

drops because of the VCC consumption current. VCC recharge function start if VCC voltage < VCHG1 （8.7V typ）C :

With the soft start function, overcurrent limit value is restricted to prevent any excessive rise in voltage or current.

D: When the switching operation starts, VOUT rises. The output voltage become to stable state, VCC voltage also

become to stable state through auxiliary winding. Please set the rated voltage within the TFOLP1b period (32ms typ)

from VCC voltage > VUVLO1.

E: During a light load, if it reaches FB voltage < VBST (0.4Vtyp), the IC starts burst operation to keep power consumption

low. During burst operation, it becomes low-power consumption mode.

F: When the FB Voltage＞VFOLP1A（2.8V typ）, it becomes a overload operation.

G: When FB pin voltage keeps VFOLP1A (2.8V typ) at or above TFOLP (64ms typ), the overload protection function is triggered

and switching stops 64ms later. if the FB pin voltage becomes FB<VFOLP1B even once, the IC’s FB OLP timer is reset.

H: If the VCC voltage drops to VCC < VUVLO2 (8.2Vtyp) or below, restart is executed.

I: The IC’s circuit current is reduced and the VCC pin value rises. (Same as B)

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

(3) VCC pin protection function

BM2PXX4F built in VCC low voltage protection function VCCUVLO (Under Voltage Lock Out), over voltage protection

function VCC OVP (Over Voltage Protection) and VCC charge function that operates in case of dropping the VCC voltage.

VCC UVLO and VCC OVP monitor VCC pin and prevent VCC pin from destroying switching MOSFET at abnormal

voltage.

VCC charge function stabilizes the secondary output voltage by charging from the high voltage line by start circuit at

dropping the VCC voltage.

(3-1) VCC UVLO ／ VCC OVP function

V CCUVLO is auto recovery protection. VCCOVP is auto recovery protection. And they have voltage hysteresis. Refer to

the operation figure-8.

Switching is stopped by the VCCOVP function when VCC pin voltage > VOVP1 (typ=27.5V), and switching is restart when

VCC pin voltage < VOVP2 (typ=23.5V)

Figure 8. VCC UVLO / OVP Timing Chart

A: DRAIN voltage input, VCC pin voltage starts rising.

B: VCC>VUVLO1, DC/DC operation starts

C: VCC< VCHG1, VCC charge function operates and the VCC voltage rises.

D: VCC > VCHG2, VCC charge function is stopped.

E: VCC > VOVP1, continues TLATCH (typ =100us), switching is stopped by the VCCOVP function.

F: VCC < VOVP2, Switching operation restarts

G: VH is OPEN.VCC Voltage is fall.

H: Same as C.

I: Same as D.

J: VCC<VUVLO2, Switching is stopped by the VCC UVLO function

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

（3-2）VCC Charge function

After VCC charge function operates once the VCC pin >VUVLO1 and the DC/DC operation starts then the VCC pin voltage

drops to <VCHG1. At that time the VCC pin is charged from DRAIN pin through start circuit.

By this operation, BM2PXX4F doesn’t occur to start failure.

When VCC pin voltage rises to VCC >VCHG2, charge is stopped. The operations are shown in figure 9.

VCC

VUVLO1

VUVLO2

VCHG1

Switching

VH charge

charge charge

OUTPUT

voltage

VCHG2

charge charge

ABCDEFGH

Figure 9. Charge operation VCC pin charge operation

A: DRAIN pin voltage rises, charge starts to VCC pin by the VCC charge function.

B: VCC > VUVLO1, VCC UVLO function releases, VCC charge function stops, DC/DC operation starts.

C: When DC/DC operation starts, the VCC voltage drops.

D: VCC < VCHG1, VCC recharge function operates and VCC pin voltage rises.

E: VCC > VCHG2, VCC recharge function stops.

F: VCC < VCHG1, VCC recharge function operates and VCC pin voltage rises.

G: VCC > VCHG2, VCC recharge function stops.

H: After start of output voltage finished, VCC is charged by the auxiliary winding VCC pin stabilizes.

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

(4) DCDC driver (PWM comparator, frequency hopping, slope compensation, OSC, burst)

BM2PXX4F is current mode PWM control.

An internal oscillator sets a fixed switching frequency (65kHz typ).

BM2PXX4F is integrated switching frequency hopping function which changes the switching frequency to fluctuate as

shown in Figure 10 below.

The fluctuation cycle is 125 Hz typ.

Switching Frequency

[kHz]

125 Hz(8ms)

Time

500us

Figure 10. Frequency hopping function

Max duty cycle is fixed as 75% (typ) and MIN pulse width is fixed as 400 ns (typ).

With current mode control, when the duty cycle exceeds 50% sub harmonic oscillation may occur.

As a countermeasure to this, BM2PXX4F is built in slope compensation circuits.

BM2PXX4F is built in burst mode circuit and frequency reduction circuit to achieve lower power consumption, when the load

is light.

FB pin is pull up by RFB (30 kΩ typ).

FB pin voltage is changed by secondary output voltage (secondary load power).

FB pin is monitored, burst mode operation and frequency detection start.

Figure 12 shows the FB voltage, and switching frequency, DCDC operation

・mode1: Burst operation

・mode2: Frequency reduction operation.

・mode3: Fixed frequency operation. (operate at the max frequency)

・mode4: Over load operation. (detect the over load state and stop the pulse operation)

Figure 11. Switching operation state changes by FB pin voltage

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

(5) Over Current limiter

BM2PXX4F is built in Over Current limiter per cycle. If the SOURCE pin exceeds a certain voltage, switching is stopped.

It is also built in AC voltage compensation function. This is the function which compensates the maximum power as the AC

voltage’s change by increasing over current limiter with time.

Shown in figure-12, 13, and 14.

Figure 12. No AC voltage compensation function Figure13. built-in AC compensation voltage

Primary peak current is decided as the formula below.

Primary peak current: I

peak = Vcs/Rs + Vdc/Lp*Tdelay

Vcs：Over current limiter voltage internal IC, Rs：Current detection resistance, Vdc input DC voltage, Lp：Primary inductance,

Tdelay：delay time after detection of over current limiter

Figure 14. Over current limiter voltage

（6）L.E.B period

When the driver MOSFET is turned ON, surge current occurs at each capacitor component and drive current.

Therefore, because SOURCE pin voltage rises temporarily, the detection errors may occur in the over current limiter circuit.

To prevent detection errors, DRAIN is switched from high to low and the SOURCE signal is masked for 250 ns by the

on-chip LEB (Leading Edge Blanking) function.

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

(7) SOURCE pin (5pin) short protection function

When the SOURCE pin (5pin) is shorted, BM2PXX4F is over heat.

BM2PXX4F built in short protection function to prevent destroying.

(8) SOURCE pin (5pin) open protection

If the SOURCE pin becomes OPEN, BM2PXX4F may be damaged.

To prevent to be damaged, BM2PXX4F built in OPEN protection circuit（auto recovery protection）.

(9) Output over load protection function （FB OLP Comparator）

The output overload protection function monitors the secondary output load status at the FB pin, and stops switching when

an overload occurs. In case of an overload, the output voltage is reduced and current no longer flows to the photo coupler,

so the FB pin voltage rises.

When the FB pin voltage > VFOLP1A (2.8 V typ) continuously for the period TFOLP1 (64ms typ), it is judged as an overload and

stops switching.

When the FB pin > VFOLP1A (2.8 V typ), if the voltage goes lower than VFOLP1B (2.6V typ) during the period TFOLP1 (64ms typ),

the overload protection timer is reset. The switching operation is performed during this period TFOLP1 (64ms typ).

At startup, the FB voltage is pulled up to the IC’s internal voltage, so operation starts at a voltage of VFOLP1A (2.8 V typ) or

above. Therefore, at startup the FB voltage must be set to go to VFOLP1B (2.6 V typ) or below during the period TFOLP1 (64ms

typ), and the secondary output voltage’s start time must be set within the period TFOLP1 (64ms typ)following startup of the IC.

Recovery from the once detection of FBOLP, after the period TFOLP2 (512 ms typ)

Figure 15. Over load protection (Auto recovery)

A: The FBOLP comparator detects over load for FB>VFOLP1A

B: If the State of A continues for the period TFOLP1 (64ms typ), it is judged as an overload and stops switching after 64ms.

C: While switching stops for the over load protection function, the VCC pin voltage drops and VCC pin voltage reaches <

VCHG1, the VCC charge function operates so the VCC pin voltage rises.

D: VCC charge function stops when VCC pin voltage > VCHG2

E: If TFOLP2 （typ =512ms） go on from B point, Switching function starts on soft start.

F: If TFOLP1 (64ms typ) go on from E point to continues a overload condition (FB>VFOLP1A), Switching function stops at F point.

G: While switching stops VCC pin voltage drops to < VCHG1, VCC charge function operates and VCC pin voltage rises.

H: If VCC pin (1pin) voltage becomes over VCHG2 by the VCC charge function, VCC charge function operation stops

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

●Operation mode of protection circuit

Operation mode of protection functions are shown in table2.

Table2 Operation mode of protection circuit

Function Operation mode

VCC Under Voltage Locked Out Auto recovery

VCC Over Voltage Protection Auto recovery

TSD Latch（with 100us timer）

FB Over Limited Protection Auto recovery（with 64ms timer）

SOURCE Open Protection Auto recovery

●Sequence

The sequence diagram is show in Fig-18.

All condition transits OFF Mode VCC<8.2V

Figure 16. The sequence diagram

VCC>13.5V

Soft Start 1

ALL MODE

Time>2.0ms

Soft Start

Time>8.0ms

FB<0.40V

Burst MODE

(Pulse OFF )

FB>0.40V

Normal MODE

OFF MODE

OLP MODE

( Pulse Stop )

FB> 2 .80 V

FB< 2 . 60 V

LATCH OFF MODE

(Pulse Stop )

Temp>145℃

VCC<7.7V

VCC< 8 .2 V

Time>0.5ms

Soft Start 2

Time>1.0ms

Soft Start 3

PULSE OFF

FB> 2 .80V

(64ms)

FBOLP

OFF TIMER

( 512ms )

VCC OVP

(Pulse Stop )

VCC> 27.5 V

VCC< 23.5V

SOURCE OPEN

(Pulse Stop )

OPEN

NORMAL

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

● Thermal loss

The thermal design should set operation for the following conditions.

(Since the temperature shown below is the guaranteed temperature, be sure to take a margin into account.)

1. The ambient temperature Ta must be 105℃ or less.

2. The IC’s loss must be within the allowable dissipation Pd.

The thermal abatement characteristics are as follows.

(PCB: 70 mm × 70mm × 1.6 mm, mounted on glass epoxy single-layer substrate)

Figure 17. SOP8 Thermal Abatement Characteristics

100

200

300

400

500

600

700

800

900

1000

0 25 50 75 100 125 150

Pd[mW]

Ta[ ℃]

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

●Ordering Information

B M 2 P X X 4 F -GE2

Product

name

Package

F : SOP8 Packaging and

forming specification

E2: Embossed tape and reel

●Marking Diagram

Series Part Number

BM2P054F 2P054

BM2P094F 2P094

SOP8 (TOP VIEW)

Part Number Marking

LOT Number

1PIN MARK

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

Physical Dimension, Tape and Reel Information

Package Name SOP8

∗

Order quantity needs to be multiple of the minimum quantity.

Embossed carrier tapeTape

Quantity

Direction

of feed

The direction is the 1pin of product is at the upper left when you hold

reel on the left hand and you pull out the tape on the right hand

2500pcs

()

Direction of feed

Reel 1pin

(UNIT: mm)

PKG: SOP8

Drawing No. : EX112-5001-1

(Max 5.35 (include. BURR))

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Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

Operational Notes

1. Reverse Connection of Power Supply

Connecting the power supply in reverse polarity can damage the IC. Take precautions against reverse polarity when

connecting the power supply, such as mounting an external diode between the power supply and the IC’s power

supply pins.

2. Power Supply Lines

Design the PCB layout pattern to provide low impedance supply lines. Separate the ground and supply lines of the

digital and analog blocks to prevent noise in the ground and supply lines of the digital block from affecting the analog

block. Furthermore, connect a capacitor to ground at all power supply pins. Consider the effect of temperature and

aging on the capacitance value when using electrolytic capacitors.

3. Ground Voltage

Ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition.

4. Ground Wiring Pattern

When using both small-signal and large-current ground traces, the two ground traces should be routed separately but

connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal

ground caused by large currents. Also ensure that the ground traces of external components do not cause variations

on the ground voltage. The ground lines must be as short and thick as possible to reduce line impedance.

5. Thermal Consideration

Should by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in

deterioration of the properties of the chip. The absolute maximum rating of the Pd stated in this specification is when

the IC is mounted on a 70mm x 70mm x 1.6mm glass epoxy board. In case of exceeding this absolute maximum

rating, increase the board size and copper area to prevent exceeding the Pd rating.

6. Recommended Operating Conditions

These conditions represent a range within which the expected characteristics of the IC can be approximately obtained.

The electrical characteristics are guaranteed under the conditions of each parameter.

7. Inrush Current

When power is first supplied to the IC, it is possible that the internal logic may be unstable and inrush

current may flow instantaneously due to the internal powering sequence and delays, especially if the IC

has more than one power supply. Therefore, give special consideration to power coupling capacitance,

power wiring, width of ground wiring, and routing of connections.

8. Operation Under Strong Electromagnetic Field

Operating the IC in the presence of a strong electromagnetic field may cause the IC to malfunction.

9. Testing on Application Boards

When testing the IC on an application board, connecting a capacitor directly to a low-impedance output pin may

subject the IC to stress. Always discharge capacitors completely after each process or step. The IC’s power supply

should always be turned off completely before connecting or removing it from the test setup during the inspection

process. To prevent damage from static discharge, ground the IC during assembly and use similar precautions during

transport and storage.

10. Inter-pin Short and Mounting Errors

Ensure that the direction and position are correct when mounting the IC on the PCB. Incorrect mounting may result in

damaging the IC. Avoid nearby pins being shorted to each other especially to ground, power supply and output pin.

Inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and

unintentional solder bridge deposited in between pins during assembly to name a few.

18/19

Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

Operational Notes – continued

11. Unused Input Pins

Input pins of an IC are often connected to the gate of a MOS transistor. The gate has extremely high impedance and

extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. The small

charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and

cause unexpected operation of the IC. So unless otherwise specified, unused input pins should be connected to the

power supply or ground line.

12. Regarding the Input Pin of the IC

This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them

isolated. P-N junctions are formed at the intersection of the P layers with the N layers of other elements, creating a

parasitic diode or transistor. For example (refer to figure below):

When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode.

When GND > Pin B, the P-N junction operates as a parasitic transistor.

Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual

interference among circuits, operational faults, or physical damage. Therefore, conditions that cause these diodes to

operate, such as applying a voltage lower than the GND voltage to an input pin (and thus to the P substrate) should

be avoided.

Figure 18. Example of monolithic IC structure

13. Ceramic Capacitor

When using a ceramic capacitor, determine the dielectric constant considering the change of capacitance with

temperature and the decrease in nominal capacitance due to DC bias and others.

14. Area of Safe Operation (ASO)

Operate the IC such that the output voltage, output current, and power dissipation are all within the Area of Safe

Operation (ASO).

15. Thermal Shutdown Circuit(TSD)

This IC has a built-in thermal shutdown circuit that prevents heat damage to the IC. Normal operation

should always be within the IC’s power dissipation rating. If however the rating is exceeded for a

continued period, the junction temperature (Tj) will rise which will activate the TSD circuit that will turn

OFF all output pins. The IC should be powered down and turned ON again to resume normal

operation because the TSD circuit keeps the outputs at the OFF state even if the TJ falls below the

TSD threshold.

Note that the TSD circuit operates in a situation that exceeds the absolute maximum ratings and therefore, under no

circumstances, should the TSD circuit be used in a set design or for any purpose other than protecting the IC from heat

damage.

16. Over Current Protection Circuit (OCP)

This IC incorporates an integrated overcurrent protection circuit that is activated when the load is shorted. This

protection circuit is effective in preventing damage due to sudden and unexpected incidents. However, the IC should

not be used in applications characterized by continuous operation or transitioning of the protection circuit.

19/19

Datasheet

BM2PXX4F Series

TSZ02201-0F2F0A200080-1-2

7. Mar.2017.Rev.009

www.rohm.com

TSZ22111・15・001

date Rev. No. Revision Point

2012.07.19 001 New Release

2013.11.18 006

P7 An explanation for Figure7

P8 An explanation for VCC_UVLO/VCC_OVP function

An explanation for Figure8

P11 An explanation for Over Current limiter

P12 An explanation for Output over load protection function

An explanation for Figure15

P13 Figure16

2015.02.23 007 P1 Package size

P16 Physical Dimension

2015.05.15 007 P13 Operation mode of protection circuit

P13 Sequence

2015.09.24 008

P7 An explanation of Start sequence

P8 An explanation of VCC pin protection function

P8 An explanation of VCC UVLO / VCC OVP function

P9 An explanation of VCC Charge function

P11 An explanation of Over Current Limiter

P12 An explanation of Output over load protection function

2017.03.07 009

P2 explanation of package powe

P2 Format for Electrical Characteristics of MOSFET

P3 Format for Electrical Characteristics of Control IC

P7 An explanation of Start sequences

P8 An explanation of Figure8

P9 An explanation of VCC pin protection function

P12 An explanation of OUTPUT over load protection function

Notice-PGA-E Rev.003

Notice

Precaution on using ROHM Products

1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,

OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you

intend to use our Products in devices requiring extremely high reliability (such as medical equipment (Note 1), transport

equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car

accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or

serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.

Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any

damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific

Applications.

(Note1) Medical Equipment Classification of the Specific Applications

JAPAN

USA

CHINA

CLASSⅢ

CLASSⅡb

CLASSⅢ

CLASSⅣ

CLASSⅢ

2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor

products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate

safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which

a failure or malfunction of our Products may cause. The following are examples of safety measures:

[a] Installation of protection circuits or other protective devices to improve system safety

[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure

3. Our Products are designed and manufactured for use under standard conditions and not under any special or

extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way

responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any

special or extraordinary environments or conditions. If you intend to use our Products under any special or

extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of

product performance, reliability, etc, prior to use, must be necessary:

[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents

[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust

[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,

H2S, NH3, SO2, and NO2

[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves

[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items

[f] Sealing or coating our Products with resin or other coating materials

[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of

flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning

residue after soldering

[h] Use of the Products in places subject to dew condensation

4. The Products are not subject to radiation-proof design.

5. Please verify and confirm characteristics of the final or mounted products in using the Products.

6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,

confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power

exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect

product performance and reliability.

7. De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in

the range that does not exceed the maximum junction temperature.

8. Confirm that operation temperature is within the specified range described in the product specification.

9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in

this document.

Precaution for Mounting / Circuit board design

1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product

performance and reliability.

2. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must

be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products,

please consult with the ROHM representative in advance.

For details, please refer to ROHM Mounting specification

Notice-PGA-E Rev.003

Precautions Regarding Application Examples and External Circuits

1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the

characteristics of the Products and external components, including transient characteristics, as well as static

characteristics.

2. You agree that application notes, reference designs, and associated data and information contained in this document

are presented only as guidance for Products use. Therefore, in case you use such information, you are solely

responsible for it and you must exercise your own independent verification and judgment in the use of such information

contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses

incurred by you or third parties arising from the use of such information.

Precaution for Electrostatic

This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper

caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be

applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,

isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).

Precaution for Storage / Transportation

1. Product performance and soldered connections may deteriorate if the Products are stored in the places where:

[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2

[b] the temperature or humidity exceeds those recommended by ROHM

[c] the Products are exposed to direct sunshine or condensation

[d] the Products are exposed to high Electrostatic

2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period

may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is

exceeding the recommended storage time period.

3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads

may occur due to excessive stress applied when dropping of a carton.

4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of

which storage time is exceeding the recommended storage time period.

Precaution for Product Label

A two-dimensional barcode printed on ROHM Products label is for ROHM’s internal use only.

Precaution for Disposition

When disposing Products please dispose them properly using an authorized industry waste company.

Precaution for Foreign Exchange and Foreign Trade act

Since concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign

trade act, please consult with ROHM in case of export.

Precaution Regarding Intellectual Property Rights

1. All information and data including but not limited to application example contained in this document is for reference

only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any

other rights of any third party regarding such information or data.

2. ROHM shall not have any obligations where the claims, actions or demands arising from the combination of the

Products with other articles such as components, circuits, systems or external equipment (including software).

3. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any

third parties with respect to the Products or the information contained in this document. Provided, however, that ROHM

will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to

manufacture or sell products containing the Products, subject to the terms and conditions herein.

Other Precaution

1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.

2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written

consent of ROHM.

3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the

Products or this document for any military purposes, including but not limited to, the development of mass-destruction

weapons.

4. The proper names of companies or products described in this document are trademarks or registered trademarks of

ROHM, its affiliated companies or third parties.

DatasheetDatasheet

Notice – WE Rev.001

General Precaution

1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.

ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny

ROHM’s Products against warning, caution or note contained in this document.

2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior

notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s

representative.

3. The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all

information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or

liable for any damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or

concerning such information.

Datasheet

Part Number BM2P054F

Package SOP8

Unit Quantity 2500

Minimum Package Quantity 2500

Packing Type Taping

Constitution Materials List inquiry

RoHS Yes

BM2P054F - Web Page

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