CS3351YDR14G - ON Semiconductor - Datasheet.Directory

September, 2005 − Rev. 12 1Publication Order Number:

CS3341/D

CS3341, CS3351, CS387

Alternator Voltage

Regulator Darlington Driver

The CS3341/3351/387 integral alternator regulator integrated circuit

provides the voltage regulation for a ut omoti ve, 3−phase alternators.

It drives an external power Darlington for control of the alternator

field current. In the event of a charge fault, a lamp output pin is

provided to drive an external darlington transistor capable of

switching on a fault indicator lamp. An overvoltage or no STATOR

signal condition activates the lamp output.

The CS3341 and CS3351 are available in SOIC−14 packages. The

CS387 is available as a Flip Chip.

For FET driver applications use the CS3361. Use of the CS3341,

CS3351 or CS387 with external FETs may result in oscillations.

Features

•Drives NPN Darlington

•Short Circuit Protection

•80 V Load Dump

•Temperature Compensated Regulation Voltage

•Shorted Field Protection Duty Cycle, Self Clearing

•Pb−Free Packages are Available*

MAXIMUM RATINGS

Rating Value Unit

Storage Temperature Range, TS−55 to +165 °C

Junction Temperature Range −40 to 150 °C

Continuous Supply 27 V

ICC Load Dump 400 mA

Lead Temperature Soldering:

Reflow: (SMD styles only) (Note 1) 230 peak °C

Maximum ratings are those values beyond which device damage can occur.

Maximum ratings applied to the device are individual stress limit values (not

normal operating conditions) and are not valid simultaneously. If these limits are

exceeded, device functional operation is not implied, damage may occur and

reliability may be affected.

1. 60 second maximum above 183°C.

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

CS33x1 = Specific Device Code

x 4 or 5

A = Assembly Location

WL = Wafer Lot

Y = Year

WW = Work Week

G = Pb−Free Package

SOIC−14

D SUFFIX

CASE 751A

IGN

NC NC

NC STATOR

Lamp Sense

OSC

114

VCC

NC NC

GND SC

PIN CONNECTIONS

SOIC−14

MARKING

DIAGRAM

VCC

Sense

Stator

IGN

GND

OSC

Lamp

DD SC

Flip Chip, Bump Side Up

http://onsemi.com

CS33x1G

AWLYWW

See detailed ordering and shipping information in the package

dimensions section on page 4 of this data sheet.

ORDERING INFORMATION

CS3341, CS3351, CS387

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Figure 1. Block Diagram

IGN

Sense

LAMP

VCC

VSUP

GND

STATOR

ENABLE

DELAY

Lamp

Indicator

STATOR

Timer

VHV

VREG

−

ENABLE

Series

Regulator

Load Dump

Detection and

Protection

VSUP

RS Flop

Set

Dominate

Power Up

STATOR

OSC

Device Driver

Note:

CS3341/CS387

Disconnected

CS3351 Connected

OSC

−

Regulator

Comparator

High Voltage

Comparator

CS3341, CS3351, CS387

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ELECTRICAL CHARACTERISTICS (−40°C < TA < 125°C, −40°C < TJ < 150°C, 9.0 V ≤ VCC ≤ 17 V; unless otherwise specified.)

Characteristic Test Conditions Min Typ Max Unit

Supply

Supply Current Enabled − − 12 25 mA

Supply Current Disabled − − − 50 mA

Driver Stage

Output High Current VDD = 1.2 V −10 −6.0 −4.0 mA

Output Low Voltage IOL = 25 mA− − 0.35 V

Minimum ON Time − 200 − − ms

Minimum Duty Cycle − − 6.0 10 %

Short Circuit Duty Cycle − 1.0 − 5.0 %

Field Switch Turn On

Rise Time − 30 − 90 ms

Field Switch Turn On

Fall Time − 30 − 90 ms

Stator

Input High Voltage − 10 − − V

Input Low Voltage − − − 6.0 V

Stator Time Out High to Low 6.0 100 600 ms

Stator Power−Up Input High CS3351 only 10 − − V

Stator Power−Up Input Low CS3351 only − − 6.0 V

Lamp

Output High Current VLAMP @ 3.0 V − − 50 mA

Output Low Voltage ILAMP @ 30 mA − − 0.35 V

Ignition

Input High Voltage ICC > 1.0 mA 1.8 − − V

Input Low Voltage ICC < 100 mA− − 0.5 V

Oscillator

Oscillator Frequency COSC = 0.22 mF65 − 325 Hz

Rise Time/Fall Time COSC = 0.22 mF− 17 − −

Oscillator High Threshold COSC = 0.22 mF− − 6.0 V

Battery Sense

Input Current − −10 − +10 mA

Regulation Voltage @25°C, R1 = 100 kW, R2 = 50 kW13.5 − 16 V

Proportional Control − 0.050 − 0.400 V

High Voltage Threshold Ratio VHigh Voltage @ LampOn

VRegulation @ 50%Duty Cycle 1.083 − 1.190 −

High Voltage Hysteresis − 0.020 − 0.600 V

CS3341, CS3351, CS387

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PACKAGE PIN DESCRIPTION

PACKAGE PIN #

PIN SYMBOL FUNCTION

SOIC−14 Flip Chip

1 1 Driver Output driver for external power switch−Darlington

2 2 GND Ground

3, 6, 7, 9, 13 3 NC No Connection

4 4 OSC Timing capacitor for oscillator

5 5 Lamp Base driver for lamp driver indicates no stator signal or overvoltage condition

8 6 IGN Switched ignition powerup

10 7 Stator Stator signal input for stator timer (CS3351 also powerup)

11 8 Sense Battery sense voltage regulator comparator input and protection

12 9 VCC Supply for IC

14 10 SC Short circuit sensing

ORDERING INFORMATION

Device Package Shipping†

CS3341YD14 SOIC−14 55 Units/Rail

CS3341YD14G SOIC−14

(Pb−Free) 55 Units/Rail

CS3341YDR14 SOIC−14 2500 Tape & Reel

CS3341YDR14G SOIC−14

(Pb−Free) 2500 Tape & Reel

CS3351YD14 SOIC−14 55 Units/Rail

CS3351YD14G SOIC−14

(Pb−Free) 55 Units/Rail

CS3351YDR14 SOIC−14 2500 Tape & Reel

CS3351YDR14G SOIC−14

(Pb−Free) 2500 Tape & Reel

CS387H Flip Chip Contact Sales

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

CS3341, CS3351, CS387

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TYPICAL PERFORMANCE CHARACTERISTICS

Figure 2. Battery Voltage vs. Temperature (°C)

Over Process Variation

15.5

14.5

13.5

−40 −20 0 20 40 60 80 100 120

Temperature (°C)

Battery Voltage

APPLICATIONS INFORMATION

The CS3341 and CS3351 IC’s are designed for use in an

alternator charging system. The circuit is also available in

flip−chip form as the CS387.

In a standard alternator design (Figure 3), the rotor carries

the field winding. An alternator rotor usually has several N

and S poles. The magnetic field for the rotor is produced by

forcing current through a field or rotor winding. The Stator

windings are formed into a number of coils spaced around

a cylindrical core. The number of coils equals the number of

pairs of N and S poles on the rotor. The alternating current

in the Stator windings is rectified by the diodes and applied

to the regulator. By controlling the amount of field current,

the magnetic field strength is controlled and hence the

output voltage of the alternator.

Referring to Figure 7, a typical application diagram, the

oscillator frequency is set by an external capacitor

connected between OSC and ground. The sawtooth

waveform ramps between 1.0 V and 3.0 V and provides the

timing for the system. For the circuit shown the oscillator

frequency is approximately 140 Hz. The alternator voltage

is sensed at Terminal A via the resistor divider network

R1/R2 on the Sense pin of the IC. The voltage at the sense

pin determines the duty cycle for the regulator. The voltage

is adjusted by potentiometer R2. A relatively low voltage on

the sense pin causes a long duty cycle that increases the Field

current. A high voltage results in a short duty cycle.

The ignition Terminal (I) switches power to the IC

through the VCC pin. In the CS3351 the Stator pin senses the

voltage from the stator. This will keep the device powered

while the voltage is high, and it also senses a stopped engine

condition and drives the Lamp pin high after the stator

timeout expires. The Lamp pin also goes high when an

overvoltage condition is detected on the sense pin. This

causes the darlington lamp drive transistor to switch on and

pull current through the lamp. If the system voltage

continues to increase, the field and lamp output turn off as

in an overvoltage or load dump condition.

The SC or Short Circuit pin monitors the field voltage. If

the drive output and the SC voltage are simultaneously high

for a predetermined period, a short circuit condition is

assumed and the output is disabled. The regulator is forced

to a minimum short circuit duty cycle.

Figure 3. IAR System Block Diagram

BATT

Ignition

Switch

Regulator

GND

FIELD

Winding

STATOR

Winding

Lamp

Indicator

CS3341, CS3351, CS387

http://onsemi.com

REGULATION WAVEFORMS

The CS3341/3351/387 utilizes proportion control to

maintain regulation. Waveforms depicting operation are

shown in Figures 4, 5 and 6, where VBAT/N is the divided

down voltage present on the Sense pin using R1 and R2

(Figure 7). A sawtooth waveform is generated internally.

The amplitude of this waveform is listed in the electric

parameter section as proportion control. The oscillator

voltage is summed with VBAT/N, and compared with the

internal voltage regulator (VREG) in the regulation

comparator which controls the field through the output

“Device Driver.”

Figure 4 shows typical steady−state operation. A 50%

duty cycle is maintained.

Figure 5 shows the effect of a drop in voltage on (VBAT/N

+ VOSC). Notice the duty cycle increase to the field drive.

Figure 6 shows the effect of an increase in voltage (above

the regulation voltage) on (VBAT/N + VOSC). Notice the

decrease in field drive.

ÎÎ

Figure 4. 50% Duty Cycle,

Steady State Figure 5. > 50% Duty Cycle,

Increased Load Figure 6. < 50% Duty Cycle

Decreased Load

VREG

VBAT/N + VOSC

VREG VREG

VBAT/N + VOSC

Field Driver On Field Driver On Field Driver On

VBAT/N + VOSC

Figure 7. Typical Application DIagram

BATTERY

2N6284

Power

Darlington

POWER GROUND

18 kW

0.1 mF

50 kW

0.047 mF

0.022 mFR6

20 kW

2.4 kW

GND

Driver

STATOR

RECTIFIER

FIELD

Lamp Indicator

R10

510 W

IGNITION

SWITCH

MPSA13

or CS299 *Note: C2 optional for reduced jitter.

LAMP

VCC

Sense

OSC

IGN

*C2

10 mF

100 kW

R5 10 kW

R3 250 W

10 W

MR2502

CS3341, CS3351, CS387

http://onsemi.com

488 mm 506 mm 510 mm

762 mm 742 mm

1.96 mm

506 mm

594 mm

605 mm

1000 mm

2.07 mm

Figure 8. Flip Chip Dimensions and Solder Bump Locations, Bump Side Up

CS3341, CS3351, CS387

http://onsemi.com

PACKAGE DIMENSIONS

SOIC−14

D SUFFIX

CASE 751A−03

ISSUE G

−A−

−B−

P7 PL

14 8

0.25 (0.010) B M

0.25 (0.010) A S

−T− F

RX 45

SEATING

PLANE D14 PL K

NOTES:

1. DIMENSIONING AND

TOLERANCING PER ANSI Y14.5M,

1982.

2. CONTROLLING DIMENSION:

MILLIMETER.

3. DIMENSIONS A AND B DO NOT

INCLUDE MOLD PROTRUSION.

4. MAXIMUM MOLD PROTRUSION

0.15 (0.006) PER SIDE.

5. DIMENSION D DOES NOT INCLUDE

DAMBAR PROTRUSION.

ALLOWABLE DAMBAR

PROTRUSION SHALL BE 0.127

(0.005) TOTAL IN EXCESS OF THE D

DIMENSION AT MAXIMUM

MATERIAL CONDITION.

DIM MIN MAX MIN MAX

INCHESMILLIMETERS

A8.55 8.75 0.337 0.344

B3.80 4.00 0.150 0.157

C1.35 1.75 0.054 0.068

D0.35 0.49 0.014 0.019

F0.40 1.25 0.016 0.049

G1.27 BSC 0.050 BSC

J0.19 0.25 0.008 0.009

K0.10 0.25 0.004 0.009

M0 7 0 7

P5.80 6.20 0.228 0.244

R0.25 0.50 0.010 0.019

__ __

PACKAGE THERMAL DATA

Parameter SOIC−14 Unit

RqJC Typical 30 °C/W

RqJA Typical 125 °C/W

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CS3341/D

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