TPS23750PWPRG4 datasheet(8/41 Pages) TI1

Part #	TPS23750PWPRG4

Description	INTEGRATED 100-V IEEE 802.3af PD AND DC/DC CONTROLLER

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REG.

1.5V

FB

COMP

GATE

RSP

AUX

COM

VBIAS

+

−

RSN

OSC.

15kW

SEN

V DD

PWM

COMP.

STATE

LATCH

GATE

DRIVER

DELAY

ERROR

AMP

CE

0.5V

UVLO

&

OVLO

+

−

RUN

20kW

TMR

RUN

FREQ

50 A

m

5 A

m

COM

CE

CLK

D

R

Q

0.75V

SOFT

START

and

FAULT

CTL

REG.

CE

HI

LO

BL

X4

CNTR.

CLK

ENABLE

VBIAS

FAULT

COMP.

MODE

SENP

80kW

−

+

15kW

Translator

−

CURRENT

LIMITCOMP.

−

+

10V

Regulator

375 s

m

0.08 W

−

+

−

+

11.3Vand

9.3V

−

+

VDD

RTN

36mV

11.2mV

CLASS

DET

Current

limit

UVLO

RTN

0

1

CE

VSS

−

+

−

+

20.5V

and

18V

21.9V

and

21.28V

1.5V

and

12V

39.3V

and

30.5V

Thermal

shutdown

0=Hot

Detect

Class

High

OTSD

RTN

UVLO

OTSD

UVLO

SMPS

TPS23750

TPS23770

SLVS590B – JULY 2005 – REVISED FEBRUARY 2008

BLOCK DIAGRAM

8

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TPS23750PWPRG4 Datasheet(PDF) 8 Page - Texas Instruments

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