LTC3725(RevA) Ver la hoja de datos (PDF) - Linear Technology

Número de pieza

componentes Descripción

Fabricante

LTC3725
(Rev.:RevA)

Single-Switch Forward Controller and Gate Driver

Linear Technology 

BLOCK DIAGRA

NDRV 3

0.6V

INDRV

+ 8V

–

+

–

0.27mA

+

–V

SSFLT 2

UVLO 1

1.242V

1.226V

VFF

0.66

+

–

4.9µA

LTC3725

7.4V/7V

LINEAR

–

REGULATOR

TRICKLE

CHARGE

13.4V/7V

TRICKLE

CHARGER

+

SHUNT REGULATOR

VCC

+

UVGD

5V

REGULATOR

14.25V –

LINE OFF

TIME

SOFT-START

FAULT

5.3V/4.7V +

–

UVINT

OC

10 IS

300mV

UVVIN

GND 11

(PAD)

FB/IN+ 4

FS/IN– 5

IN+

CONDITION IN–

PWM

RECEIVER

SW

DET

SW

PWM SECONDARY CONTROL

DET

5V

+

PRIMARY

SIDE CONTROL

N/C

400mV

–

PWM

PRIMARY

CONTROL

FREQUENCY

2V

SET

RAMP

VP-P

VP-P OSCILLATOR CLOCK

0V

OPTO

BIAS

IOSC

SECONDARY SIDE CONTROL

3.3V

VCC

RECTIFIER

PGND

DRIVE

LOGIC

1.26V

9 VSLMT

SWITCH

ON

8 VCC

7 GATE

6 PGND

3725 BD

3725fa

7

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