MC44603DW datasheet(5/24 Pages) ONSEMI

Part #	MC44603DW

Description	MIXED FREQUENCY MODE GREENLINE PWM CONTROLLER

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Manufacturer	ONSEMI [ON Semiconductor]

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MC44603

5

MOTOROLA ANALOG IC DEVICE DATA

Representative Block Diagram

This device contains 243 active transistors.

S

RF Stby

Rref

RF Stby

Vref

15 16

Reference

Block

Vref

Iref

+

VCC

1

14.5 V/7.5 V

Vaux

18.0 V

To Power

Transforme

VC

2

Output

3

Gnd

4

OVP

6

Current

Sense Input

7

VCC

Vref

VOVP

Out

2.0

µs

Delay

Vref

5.0

µs

Delay

+

2.5 V

ROVP

11.6 k

2.0 k

VCC

+

9.0 V

SS/Dmax/VM

2.4 V

RSS

CSS

11

1.0 V

Demag

Detect

8

Sync

Input

9

Vref

+

65 mV

3.7 V

1.0 V

0.4 Iref

CT

10

RPwr Stby

12

Feed–

back

14

Compen–

sation

13

Foldback

Input

5

1.6 V

3.6 V

+

CT

0.7 V

VDemag Out

Synchro

VOSC prot

0.4 Iref

Vref Vref

Vref

0.4 Iref

0.6 Iref

0.8 Iref

0.25

IF Stby

0.2 Iref

IDischarge

IDischarge/2

Current Mirror X2

0.4 Iref

Vref

2R

VCC

1.0 mA

Error Amplifier

R

Q

S

R

Q

S

R

Q

S

R

Q

= Sink only

= Positive True Logic

+

2.5 V

Thermal

Shutdown

IF Stby

UVLO2

VOSC

+

1.6 V

UVLO1

5.0 mA

Negative

Active

Clamp

Similar Part No. - MC44603DW

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