PKF4910ASI - Power-One - Datasheet.Directory

6.6–10 W DC/DC Power Modules

48 V Input Series

The MacroDens™ 10W PKF 4000A I series true

component level on-board DC/DC power modules are

intended as distributed power sources in decentralized

–48 and –60VDC power systems. Utilization of

thick film technology and a high degree of silicon

integra-tion has made it possible to achieve a MTBF

of more than 4.9 million hours.

The high reliability and the very low height of these

DC/DC power modules makes them particularly

suited for Information Technology and Telecom

(IT&T) applications, with board spacing down to

15 mm or 0.6 in.

The over-moulded rugged design also makes them

suitable for other demanding industrial applications.

They are optimized for free convection cooling and

have an operational ambient temperature range in

compliance with present and future application needs,

including non temperature controlled environments.

The mechanical design offers the choice of surface

mount or through-hole versions, delivered in ready-

to-use tubes, trays or tape & reel package, and

compati-bility with semi and fully aqueous cleaning

processes.

The PKF series is manufactured using highly

automated manufacturing lines with a world-class

quality commitment and a five-year warranty.

Ericsson Microelectronics AB has been an ISO 9001

certified supplier since 1991. For a complete product

program please reference the back cover.

Patents

US: D357901 DE: M94022763

• SMD and through-hole versions

with ultra low component height

8.0 mm (0.315 in.)

• 83% efficiency (typ at 5V)

• 1,500 Vdc isolation voltage

• Switching frequency syncronization

• MTBF >4.9 million hours at

+55°C case temperature (+40°C

ambient)

• Low EMI measured according to

CISPR 22 and FCC part 15J

PKF 4000A I

2EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

NOTES:

1) The input voltage range 38…72 Vdc meets

the European Telecom Standard prETS

300 132-2 Nominal input voltage range in

48 V and 60 Vdc power systems,

–40.5…–57.0 V and –50.0…–72.0 V

respectively. At input voltages exceeding 72 V

(abnormal voltage) the power loss will be

higher than at normal input voltage and TC

must be limited to max +95°C. Absolute max

continuous input voltage is 75 Vdc. Output

characteristics will be marginally affected at

input voltages exceeding 72 V.

2) The power modules will operate down to

£36 V, when VI decreases, but will turn on at

VI £38 V, when VI increases (see also Operating

information).

3) The test is applicable for through-hole versions.

Stress in excess of Absolute Maximum

Ratings may cause permanent damage.

Absolute Maximum Ratings, sometimes

referred to as no destruction limits, are

normally tested with one parameter at a

time exceeding the limits of Output data

or Electrical Characteristics. If exposed to

stress above these limits, function and per-

formance may degrade in an unspecified

manner.

General

Absolute Maximum Ratings

Characteristics

Isolation voltage

(input to output test voltage)

VISO

min max Unit

TCCase temperature at full output power –45 +100 °C

TSStorage temperature –55 +125 °C

VIContinuous input voltage1) –0.5 +75 Vdc

1,500 Vdc

Vtr Transient input energy 0.01 Ws

VRC Remote control voltage pin 10, 11 ref. to pin 17 –5 +16 Vdc

Vadj Output adjust voltage pin 8, 9 ref. to pin 17 –5 +40 Vdc

Environmental Characteristics

Characteristics

Frequency 10…500 Hz

Amplitude 0.75 mm

Acceleration 10 g

Number of cycles 10 in each axis

Vibration

(Sinusoidal)

JESD 22-B103

(IEC 68-2-6 Fc)

Test procedure & conditions

Frequency 10…500 Hz

Acceleration density

spectrum 0.5 g2/Hz

Duration 10 min in 3 directions

Reproducability medium (IEC 62-2-36)

MIL-STD-883

Method 2026

(IEC 68-2-34 Ed)

Random

vibration

Peak acceleration 200 g

Shock duration 3 ms

Shock

(Half sinus)

JESD 22-B104

(IEC 68-2-27 Ea)

Temperature 85°C

Humidity 85% RH

Duration 1000 hours

Temperature –40°C…+125°C

Number of cycles 500

Temperature, solder 260°C

Duration 10…13 s

Temperature

change

Accelerated

damp heat

Solder

resistability3)

JESD 22-A104

(IEC 68-2-14 Na)

JESD 22-A101

(IEC 68-2-3 Ca

with bias)

JESD 22-B106

(IEC 68-2-20 Tb 1A)

Duration 96 h

Temperature 35°C

Concentration 5 %

IEC 68-2-11 Ka

Aggressive

environment

Input TC <T

Cmax unless otherwise specified

Input stand-by powerPRC

VIInput voltage range1)2) 38 72 V

VIoff Turn-off input voltage 30.0 36.0 V34.5

See typical characteristics

VIon Turn-on input voltage 38.0 V36See typical characteristics

CIInput capacitance mF1.4

PIi Input idling power IO= 0, TC=–30…+95°C (VI=53V)

(VI=66V)

310

(VI=53V)

(VI=66V)

TC=–30…+95 °C,

RC connected to pin 17

Characteristics Conditions min typ max Unit

EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

Connections

Pin Designation Function

1 Out 1 Output 1. Positive voltage ref. to Rtn.

2 Rtn Output return.

3–6 NC Not connected.

7 Sync Synchronization input.

adj Output voltage adjust. To set typical output voltage (VOi)

connect pin 8 to pin 9.

9 NOR Connection of Nominal Output voltage Resistor. (See Operating

Information, Output Voltage Adjust).

10 TOA Turn-on/off input voltage adjust (VIon/VIoff). Used to decrease the

turn-on/off input voltage threshold.

11 RC Remote control and turn-on/off input voltage adjust. Used to turn-on

and turn-off output and to set the turn-on/off input voltage threshold.

12–16 NC Not connected.

17 –In Negative input.

18 +In Positive input.

Case

The case consists of semiconductor grade

epoxy with embedded pins.

Coefficient of thermal expansion (CTE) is

typ. 15 ppm/°C.

Weight

Maximum 20 g (0.71 oz).

Connection Pins

Base material is copper (Cu), first plating is

nickel (Ni) and second (outer) plating is

palladium (Pd).

Mechanical Data

Through-hole version

Foot print Component side

Dimensions in mm (in)

3.6 [0.142]

5.0 [0.197]

24.0 [0.945]

29.6 [1.165]

2.8 [0.110]

12 345 6789

1011

131415

40.0 [1.575]

Dimensions in mm (in)

Surface-mount version

40.0 [1.575]

Foot print Component side

4EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

Thermal Data

Two-parameter model

This model provides a more precise description of the thermal charac-

teristics to be used for thermal calculations.

Thermally the power module can be considered as a component and

the case temperature can be used to characterize the properties. The

thermal data for a power module with the substrate in contact with

the case can be described with two thermal resistances. One from case

to ambient air and one from case to PB (Printed circuit Board).

The thermal characteristics temperature can be calculated from the

following formula:

TPB = (TC–TA)×(Rth C–PB+Rth C–A)/Rth C–A–Pd×Rth C–PB+TA

Where:

Pd: dissipated power, calculated as PO ×(l/h–1)

TC: max average case temperature

A: ambient air temperature at the lower side of the power

module

TPB: temperature in the PB between the PKF connection pins

Rth C-PB: thermal resistance from case to PB under the power

module

Rth C-A: thermal resistance from case to ambient air

v: velocity of ambient air

Rth C-PB is constant and Rth C-A is dependent on the air velocity.

Free convection is equal to an air velocity of approx. 0.2 – 0.3 m/s.

See figure below.

Palladium plating is used on the terminal pins. A pin temperature (Tp)

in excess of the solder fusing temperature (+183°C for Sn/Pb 63/37)

for more than 25 seconds and a peak temperature above 195°C, is

required to guarantee a reliable solder joint.

Both pin 1 and pin 9 must be monitored.

No responsibility is assumed if these recommendations are not

strictly followed.

Reflow Soldering Information

The PKF series of DC/DC power modules are manufactured in surface

mount technology. Extra precautions must therefore be taken when

reflow soldering the surface mount version. Neglecting the soldering

information given below may result in permanent damage or signifi-

cant degradation of power module performance.

The PKF series can be reflow soldered using IR, Natural Convection,

Forced Convection or Combined IR/Convection Technologies. The high

thermal mass of the component and its effect on DT (°C) requires that

particular attention be paid to other temperature sensitive components.

IR Reflow technology may require the overall profile time to be ex-

tended to approximately 8–10 minutes to ensure an acceptable DT.

Higher activity flux may be more suitable to overcome the increase in

oxidation and to avoid flux burn-up.

The general profile parameters detailed in the diagram, with this ex-

tended time to reach peak temperatures, would then be suitable.

Note! These are maximum parameters. Depending on process varia-

tions, an appropriate margin must be added.

EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

Safety

The PKF 4000A I series DC/DC power modules are designed in

accordance with EN 60 950, Safety of information technology equipment

including electrical business equipment. SEMKO certificate no. 9814213.

The PKF power modules are recognized by UL and meet the applica-

ble requirements in UL 1950 Safety of information technology equipment,

the applicable Canadian safety requirements and UL 1012 Standard

for power supplies.

The DC/DC power module shall be installed in an end-use equip-

ment and considerations should be given to measuring the case tem-

perature to comply with TCmax when in operation. Abnormal compo-

nent tests are conducted with the input protected by an external

15 A fuse. The need for repeating these tests in the end-use

appliance shall be considered if installed in a circuit having higher

rated devices.

When the supply to the DC/DC power module meets all the require-

ments for SELV (<60 Vdc), the output is considered to remain within

SELV limits (level 3). The isolation is an operational insulation in

accordance with EN 60 950.

The DC/DC power module is intended to be supplied by isolated

secondary circuitry and shall be installed in compliance with the

requirements of the ultimate application. If they are connected to a

60 V DC system reinforced insulation must be provided in the power

supply that isolates the input from the mains. Single fault testing in

the power supply must be performed in combination with the

DC/DC power module to demonstrate that the output meets the

requirement for SELV. One pole of the input and one pole of the

output is to be grounded or both are to be kept floating.

The terminal pins are only intended for connection to mating con-

nectors of internal wiring inside the end-use equipment.

These DC/DC power modules may be used in telephone equipment

in accordance with paragraph 34 A.1 of UL 1459 (Standard for Tele-

phone Equipment, second edition).

The galvanic isolation is verified in an electric strength test. Test

voltage (VISO) between input and output is 1,500 Vdc for 60 s. In

production the test duration may be decreased to 1 s.

The capacitor between input and output has a value of 1 nF and the

leakage current is less than 1µA @ 53 Vdc.

The case is designed in non-conductive epoxy. Its flammability

rating meets UL 94V-0. The oxygen index is 34%.

Fundamental circuit diagram

Single output

Electrical Data

Transient input voltage

Single voltage pulse at +25 °C ambient temperature.

6EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

TC = –30…+95°C, VI = 38 ...72V and pin 8 connected to pin 9.

0 2.0 A

PKF 4610A

Characteristics Conditions Output 1

min typ max

Unit

Output voltage initial

setting and accuracy

VOi

Output voltage

tolerance band

Idling voltage IO = 0 A

Load regulation IO = 0.2…2.0 A, VI = 53 V

ttr

Load transient voltage

Vtr

Temperature coefficient2)

Tcoeff

Start-up time

Max output power2)

POmax

Current limiting

threshold

Ilim TC<TCmax, VO = 3.0 V

Short circuit current

Isc VO = 0.2…0.5V, TC=+25°C

20 Hz…5 MHz

Line regulation IO = 2 A

Load transient

recovery time

3.27 3.30 3.33 V

3.80 4.15 V

+200 mV

–200 mV

–0.6 mV/°C

2ms

5ms

6.6 W

2.35 2.80 A

3.0 A

20 70 mVp-p

80 dBmV

150 ms

0.6 …50 MHz

3.17 3.42 V

Long term drift

included

Output

IO = 0.2…2.0 A

VI = 38…60 V

Output adjust range1) 1.7 3.8 V

IO = 0.2…2.0 A, VI = 53V

load step = 1 A

50 dB

1) See also Operating Information.

2) See Typical Characteristics.

TC = +25°C, IO = 1.5 A, VI = 53 V

Ramp-up time

Output current

IO = 2 AOutput ripple & noise

VOac

f = 100 Hz sine wave, 1Vp-p, VI = 53 V

(SVR = 20 log (1 Vp-p/VOp-p))

IO = 0.2…2.0 A, VI = 53 V

From VI connection to VO = 0.9 ×VOi

IO = 2 A, 0.1…0.9 ×VO, VI = 53 V

IO = 2 A, TC =+40…+90ºC

SVR Supply voltage rejection (ac)

2.2

Characteristics Conditions Unit

min typ max

PdPower dissipation

Miscellaneous

Efficiency

IO = 2 A

75 78

VI = 53 V

VI = 66 V

VI = 53 V

VI = 66 V 75 78

2.2 W

VI = 50…72 V 10

Calculated value

50 150 mV

TC = 0…+95°C

TC = –30°C 2.90 3.42 V

EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

TC = –30…+95°C, VI = 38 ...72V and pin 8 connected to pin 9.

03.0A

PKF 4910A

Characteristics Conditions Output 1

min typ max

Unit

Output voltage initial

setting and accuracy

VOi

Output voltage

tolerance band

Idling voltage IO = 0 A

Load regulation IO = 0.3…3.0 A, VI = 53 V

ttr

Load transient voltage

Vtr

Temperature coefficient2)

Tcoeff

Start-up time

Max output power2)

POmax

Current limiting

threshold

Ilim TC<TCmax, VO = 3.0 V

Short circuit current

Isc VO = 0.2…0.5V, TC=+25°C

20 Hz…5 MHz

Line regulation IO = 3 A

Load transient

recovery time

3.27 3.30 3.33 V

3.7 4.0 V

+300 mV

–300 mV

–1.5 mV/°C

3ms

6ms

9.9 W

3.2 3.4 3.7 A

4.1 A

20 50 mVp-p

80 dBmV

130 ms

0.6 …50 MHz

3.17 3.43 V

Long term drift

included

Output

VI = 38…60 V

Output adjust range1) 1.75 4.08 V

IO = 0.3…3.0 A, VI = 53 V

load step = 1.5 A

60 dB

1) See also Operating Information.

2) See Typical Characteristics.

TC = +25°C, IO = 2.0 A, VI = 53 V

Ramp-up time

Output current

IO = 3 A

Output ripple & noise

VOac

f = 100 Hz sine wave, 1Vp-p, VI = 53 V

(SVR = 20 log (1 Vp-p/VOp-p))

IO = 0.3…3.0 A, VI = 53 V

From VI connection to VO = 0.9 ×VOi

IO = 3 A, 0.1…0.9 ×VO, VI = 53 V

IO = 3 A, TC =+40…+90 ºC

SVR Supply voltage rejection (ac)

3.3

Characteristics Conditions Unit

min typ max

PdPower dissipation

Miscellaneous

Efficiency

IO = 3 A

75 78

VI = 53 V

VI = 66 V

VI = 53 V

VI = 66 V 75 78

3.3 W

VI = 50…72 V 10

Calculated value

30 170 mV

IO = 0.3…2.5 A

IO = 0.3…3.0 A 3.13 3.43 V

8EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

TC = –30…+95°C, VI = 38 ...72V and pin 8 connected to pin 9.

0 2.0 A

PKF 4111A

Characteristics Conditions Output 1

min typ max

Unit

Output voltage initial

setting and accuracy

VOi

Output voltage

tolerance band

Idling voltage IO = 0 A

Load regulation IO = 0.2…2.0 A, VI = 53 V

ttr

Load transient voltage

Vtr

Temperature coefficient2)

Tcoeff

Start-up time

Max output power2)

POmax

Current limiting

threshold

Ilim TC<TCmax, VO = 4.0 V

Short circuit current

Isc VO = 0.2…0.5 V, TC =+25°C

20 Hz…5 MHz

Line regulation IO = 2 A

Load transient

recovery time

5.02 5.05 5.08 V

5.8 6.0 V

50 80 180 mV

+200 mV

–200 mV

–1.3 mV/°C

2ms

5ms

10 W

2.15 2.60 A

3.0 A

20 50 mVp-p

80 dBmV

200 ms

0.6 …50 MHz

4.85 5.25 V

Long term drift

included

Output

IO = 0.2…2.0 A

VI = 38…60 V

Output adjust range1) 2.62 6.39 V

IO = 0.2…2.0 A, VI = 53 V

load step = 1 A

50 dB

1) See also Operating Information.

2) See Typical Characteristics.

TC = +25°C, IO = 1.5 A, VI = 53 V

Ramp-up time

Output current

IO = 2 AOutput ripple & noise

VOac

f = 100 Hz sine wave, 1Vp-p, VI = 53 V

(SVR = 20 log (1 Vp-p/VOp-p))

IO = 0.2…2.0 A, VI = 53 V

From VI connection to VO = 0.9 ×VOi

IO = 2 A, 0.1…0.9 ×VO

IO = 2 A, TC =+40…+90ºC

SVR Supply voltage rejection (ac)

2.5

Characteristics Conditions Unit

min typ max

PdPower dissipation

Miscellaneous

Efficiency

IO = 2 A

78 83

VI = 53 V

VI = 66 V

VI = 53 V

VI = 66 V 78 81

2.5 W

VI = 50…72 V 6

Calculated value

EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

Typical Characteristics

Output characteristic (typ) Power derating

Temperature coefficient Turn-on/turn-off input voltage

Efficiency (typ) @ TA = +25°C

Output voltage band

PKF 4610A

Dynamic load response (typ) @ +25°C

0.1 ms/div

2 A/div

200 mV/div

The output voltage

deviation is deter-

mined by the load

transient (dI/dt)

Load change:

dI/dt »4A/ms

10 EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

Temperature coefficient Turn-on/turn-off input voltage

The output voltage

deviation is deter-

mined by the load

transient (dI/dt)

Load change:

dI/dt »4A/ms

Dynamic load response (typ) @ +25°C

0.1 ms/div

2 A/div

200 mV/div

Output characteristic (typ) Power derating Efficiency (typ) @ TA = +25°C

PKF 4910A

Turn-off

Output characteristic (typ) Power derating

Temperature coefficient Turn-on/turn-off input voltage

Efficiency (typ) @ TA = +25°C

PKF 4111A

0.1 ms/div

2 A/div

200 mV/div

The output voltage

deviation is deter-

mined by the load

transient (dI/dt)

Load change:

dI/dt »4A/ms

Dynamic load response (typ) @ +25°C

EN/LZT 146 30 R2A ©Ericsson Microelectronics AB, October 2000

EMC Specifications

The PKF power module is mounted on a double sided Printed circuit

Board (PB) with ground plane during EMC measurements.

The fundamental switching frequency is 510 kHz ±5% @

IO = (0.1…1.0) × IOmax.

EFT

Electrical Fast Transients on the input terminals could affect the

output voltage regulation causing functional errors on the Printed

Board Assembly (PBA). The PKF power modules withstand EFT

levels of 0.5 kV keeping VO within the tolerance band and

2.0 kV without destruction. Tested according to IEC publ. 801-4.

Operating Information

Remote Control (RC)

Turn-on or turn-off can be realized by using the RC-pin. If pin 11 is

connected to pin 17 the power modules turns off. Normal operation

is achieved if pin 11 is open (NC). To ensure safe turn-off the voltage

difference between pin 11 and 17 shall be less than 1.0V. RC is an

TTL open collector compatible output with a sink capacity >300 mA

(see fig. 1).

Conducted EMI (input teminals)

PKF series typical conducted EMI performance

Test set up

Frequency range Voltage level

0.15...300 MHz 1.0 Vrms

The signal is amplitude modulated with 1 kHz/80% and applied in

both differential and common mode.

Conducted EMS

Electro Magnetic Susceptibility is measured by injection of elec-

trical disturbances on the input terminals. No deviation outside

the VO tolerance band will occur under the following conditions:

External Filter (class B)

Required external input filter in order to meet class B in EN 55022,

CISPR 22 and FCC part 15J.

The low ESR is critical for the result.

Figure 1

Radiated EMS (Electro-Magnetic Fields)

Radiated EMS is measured according to test methods in

IEC Standard publ. 801-3. No deviation outside the VO tolerance

band will occur under the following conditions:

Frequency range Voltage level

0.01...200 MHz 3 Vrms/m

200...1,000 MHz 3 Vrms/m

1...12 GHz 10 Vrms/m

Fuse Considerations

To prevent excessive current from flowing through the input supply

line, in the case of a short-circuit across the converter input, an exter-

nal fuse should be installed in the non-earthed input supply line. We

recommend using a fuse rated at approximately 2 to 4 times the value

calculated in the formula below:

Refer to the fuse manufacturer for further information.

POmax

(hmin × VImin)

Iinmax =

Test Voltage level

Air discharge ±4 kV

Contact discharge ±2 kV

ESD

Electro Static Discharge is tested according to IEC publ. 801-2. No

destruction will occur if the following voltage levels are applied to

any of the terminal pins:

Output Ripple & Noise (VOac)

Output ripple is measured as the peak to peak voltage of the funda-

mental switching frequency.

Figure 2

Over Voltage Protection (OVP)

The remote control can also be utilized for OVP by using the exter-

nal circuitry in figure 2. Resistor values are for 5V output applica-

tions, but can easily be adjusted for other output voltages and the

desired OVP level.

Output Voltage Adjust (Vadj)

Output voltage, VO, can be adjusted by using an external resistor or

other external circuitry. If other circuitry is used, the slew rate has to

be limited to maximum 5 V/ms. If pins 8 and 9 are not connected

together the output will decrease to a low value. To increase VO a

resistor should be connected between pin 8/9 and 17, and to decrease

VO a resistor should be connected between pin 8 and 9 (see fig. 4).

Figure 4

Typical required resistor value to increase V

O is given by:

Radj = k5 × (k6 – VO)/(VO – VOi) kW

where VO is the desired output voltage,

VOi is the typical output voltage initial setting

and k5=3.18 k6=3.87 PKF 4610A

k5=4.20 k6=6.39 PKF 4111A*)

k5=4.20 k6=4.13 PKF 4910A

Typical required resistor value to decrease V

O is given by:

Radj = k7 × (VOi – VO)/(VO – k8) kW

where k7=17.20 k8=1.73 PKF 4610A

k7=18.0 k8=2.62 PKF 4111A*)

k7=17.60 k8=1.75 PKF 4910A

PKF 4610A: The following typical resistor values can be used to

adjust the output voltage to 1.8 V or 2.5 V. For more information

on temperature dependence see fig. 5.

Output voltage

tolerance band Rodnom (W)Standard values E24 (W)

2.5 V ± 4% 17.8 k 20 k//160 k 1% 200 ppm

1.8 V ± 4% 360 k 360 k 1% 200 ppm

Max output current vs case temperature for ±4% tolerance band

at different output voltages.

Figure 5

PKF 4910A: The following typical resistor values can be used to

adjust the output voltage to 1.8 V or 2.5 V.

Output voltage

tolerance band Rodnom (W)Standard values E24 (W)

2.5 V ± 4% 19.4 k 33 k//47 k 1% 200 ppm

1.8 V ± 4% 500 k 1M//1M 1% 200 ppm

*) This formula is valid for PKF 4111A Rev. 3B and above, for prior

revision index, please contact the factory.

Figure 3

Turn-on/off Input Voltage

The power module monitors the input voltage and will turn on and

turn off at predetermined levels set by means of external resistors.

To increase V

Ion a resistor should be connected between pin 11 and

17 (see fig. 3).

The resistance is given by the following equation

(For VIon>37 V):

RIon = (k1 – VIon)/(VIon – k2) kW

where k2 is the typical unadjusted turn-on input voltage (V).

VIoff is the adjusted turn-off input voltage and is determined by

VIon –VIoff = 2 V (typical value).

To decrease V

Ion a resistor should be connected between pin 10 and

11 (see fig. 3). The resistance is given by the following equation (for

34.5 V < VIon > 36 V:

RIon = k3 × (VIon – k4)/(k2 – VIon) kW

k1k2k3k4

2780 36.0 49 32.0 PKF 4610A, PKF 4910A

PKF 4111A*)

Voltage Margining

For voltage controlled margining e.g. at final test, the following

setup can be used. By increasing the control voltage V1 to +10 V the

output voltage decreases 5% of VOi, and by decreasing V1 to –10 V

the output voltage increases 5%.

Capacitive Load

The PKF series has no maximum limit for capacitive load on the out-

put. The power module may operate in current limiting mode during

start-up, affecting the ramp-up and the start-up time. For optimum

start performance we recommend maximum 100 mF/A of IO. Connect

capacitors at the point of load for best performance.

Input and Output Impedance

Both the source impedance of the power feeding and the load imped-

ance will interact with the impedance of the DC/DC power module.

It is most important to have the ratio between L and C as low as

possible, i.e. a low characteristic impedance, both at the input and

output, as the power modules have a low energy storage capability.

Use an electrolytic capacitor across the input if the source inductance

is higher than 10 mH. Their equivalent series resistance together

with the capacitance acts as a lossless damping filter. Suitable capaci-

tor values are in the range 10–100 mF.

Parallel Operation

Paralleling of several converters is easily accomplished by direct

connection of the output voltage terminal pins. The load regulation

characteristic is specifically designed for optimum paralleling per-

formance. Load sharing between converters will be within ±10%. It

is recommended not to exceed PO = n × 0.9 × POmax, where POmax is

the maximum converter output power and n the number of paralleled

converters, to prevent overloading any of the converters and thereby

decreasing the reliability performance.

Precision load regulation for the PKF 4000A series

PKF 4000A I has a load regulation which allows paralleling of the

power modules without external control. If there is a need for tighter

voltage regulation, the figure below (fig. 7) shows how to obtain a

very exact voltage.

The output voltage is divided by two resistors and compared with a

reference voltage. Out 1 integrates the voltage difference and the

signal is fed back to output adjust by an opto coupler. Please note:

The operational amplifier must be a single supply in order to operate

at the actual output voltage if there are no other voltages available.

The opto coupler should have a current gain of 25–200%.

The output voltage is: Uout = Uref × (R2 + R1)/R2

Other output voltages and reference voltages may be used. R1 and

R2 is calculated from formula above. Please keep the values in the

same range as in table below.

Table for selecting resistor values depending on desired output

voltage.

1.8 V 2.5V 3.3V

R1(W) 160 k 200 k 220 k

R2(W) 330 k 191 k 130 k

R3(W) 21 k 6.8 k 1 k

Synchronization (Sync)

It is possible to synchronize the switching frequency to an external

symmetrical clock signal. The input can be driven by an TTL-com-

patible output and referenced to the input pin 17.

Characteristics min typ max unit

High level 2.2 6.5 V

Threshold level*) 1.2 1.7 2.2 V

Low level 0 0.4 V

Sink current 1.5 mA

Sync. frequency 520 688 kHz

*) Rise time <10ns

Current Limiting Protection (Ilim)

The output power is limited at loads above the output current

limiting threshold (Ilim), specified as a minimum value.

Figure 6

Figure 7

Tape & Reel

SMD versions, SI, can be delivered in standard tape & reel package

(designated by /C) on request, see fig. 10. For more information,

please contact your local Ericsson sales office.

Figure 10

Capacity: 15 power modules/tray

Stacking pitch: 10.16 mm

Weight: Typ. 130 g

Min. order quantity: 150 pcs (one box contains 10 full trays)

Specification

Tape material: Conductive polystyrene (PS)

Tape width: 72 mm

Tape pitch: 36 mm

Max surface resistance: 105W/

Tape color: Black

Cover tape color: Transparent

Reel diameter: 13"

Reel hub diameter: 7"

Reel capacity: 150 power modules/reel

Full reel weight: Typ. 3.7 kg

Min. order quantity: 300 pcs (one box contains two reels)

Delivery Package Information

Tubes

The PKF-series is delivered in tubes (designated by /A) with a length

of 500 mm (19.69 in), see fig. 8.

Figure 8

Specification

Material: Antistatic coated PVC

Max surface resistance: 1011W/

Color: Transparent

Capacity: 10 power modules/tube

Weight: Typ. 60 g

End stops: Pins

Trays

SMD versions, SI, can be delivered in standard JEDEC trays (desig-

nated by /B) on request, see fig. 9. For more information, please

contact your local Ericsson sales office.

Figure 9

Specification

Material: Polypropylene (PP)

Max temperature: 125 ºC

Max surface resistance: 105W/

Color: Black

Quality

Reliability

Meantime between failure (MTBF) is calculated to >4.9 million

hours at full output power and a case temperature of +55°C

(TA = +40°C), using the Ericsson failure rate data system.

The Ericsson failure rate data system is based on field failure

rates and is continuously updated. The data corresponds to actual

failure rates of components used in Information Technology and

Telecom equipment in temperature controlled environments

(TA = –5… +65°C). The data is considered to have a confidence

level of 90%. For more information see Design Note 002.

Quality Statement

The products are designed and manufactured in an industrial envi-

ronment where quality systems and methods like ISO 9000, 6s and

SPC, are intensively in use to boost the continuous improvements

strategy. Infant mortality or early failures in the products are screened

out by a burn-in procedure and an ATE-based final test.

Conservative design rules, design reviews and product qualifications,

plus the high competence of an engaged work force, contribute to the

high quality of our products.

Warranty

Ericsson Microelectronics warrants to the original purchaser or end

user that the products conform to this Data Sheet and are free from

material and workmanship defects for a period of five (5) years from

the date of manufacture, if the product is used within specified con-

ditions and not opened. In case the product is discontinued, claims

will be accepted up to three (3) years from the date of the discontinu-

ation.

For additional details on this limited warranty please refer to Ericsson

Microelectronics AB’s “General Terms and Conditions of Sales”, or

individual contract documents.

Limitation of liability

Ericsson Microelectronics does not make any other warranties, ex-

pressed or implied including any warranty of merchantability or

fitness for a particular purpose (including, but not limited to, use in

life support applications, where malfunctions of product can cause

injury to a person’s health or life).

Information given in this data sheet is believed to be accurate and reliable. No respon-

sibility is assumed for the consequences of its use nor for any infringement

of patents or other rights of third parties which may result from its use.

No license is granted by implication or otherwise under any patent or patent rights of

Ericsson Microelectronics. These products are sold only according to Ericsson Microe-

lectronics’ general conditions of sale, unless otherwise confirmed in writing.

Specifications subject to change without notice.

*) See also Delivery Package Information

Product Program

VIVO/IO max Ordering No.*)

Through-hole SMD

PKF 4610A PI

PKF 4910A PI

PKF 4111A PI

PKF 4610A SI

PKF 4910A SI

PKF 4111A SI

6.6 W

9.9 W

10 W

PO max

48/60 V

(max 75 Vdc)

Output 1

3.3 V/2 A

3.3 V/3 A

5 V/2 A

EN/LZT 146 30 R2A

Preliminary Data Sheet

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Ericsson Microelectronics AB

SE-164 81 KISTA, Sweden

Phone: +46 8 757 5000

www.ericsson.com/microelectronics

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