AMC3844B 데이터 시트보기 (PDF) - ADDtek Corp

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AMC3844B

CURRENT MODE PWM CONTROLLER

ADDtek Corp 

VREF

8 (14)

Internal

Bias

5V EN

VREF

AMC3842B/43B/44B/45B

BLOCK DIAGRAM

7 (12) VCC

U.V.L.O.

36V

5 (9) GND

VFB 2 (3)

COMP 1 (1)

CURRENT

SENSE

RT/CT 4 (7)

3 (5)

VREF

Good Logic

Error Amp

2R

R

Oscillator

Current

Sense

1V

R

PWM

Latch

S

T

7 (11) PWR

VC

OUTPUT

6 (10)

PWR

5 (8) GND

( ) are 14 Pin S.O.I.C. pin number

Note 2: VCC and PWR VC are internally connected for 8 pin packages.

Note 3: PWR GND and GND are internally connected for 8 pin packages.

Note 4: U.V.L.O. is 16V for 3842B/44B and 8.4V for 3843B/45B.

Note 5: Hysteresis is 6V for 3842B/44B and 0.8V for 3843B/45B.

Note 6: Toggle flip flop used only in 3844B/45B

Copyright © 2006 ADDtek Corp.

3

DD019_F -- OCTOBER 2006

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