UCC2541_16 datasheet(7/43 Pages) TI1

Part #	UCC2541

Description	HIGH-EFFICIENCY SYNCHRONOUS BUCK PWM CONTROLLER

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Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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UCC2541

SLUS621A − AUGUST 2004 − SEPTEMBER 2005

7

www.ti.com

FUNCTIONAL BLOCK DIAGRAM

UVLO

REFERENCE

PREDICTIVE

LOGIC

OSCILLATOR

RAMP

&

PWM LOGIC

CLK

GEN

ERROR

AMPLIFIERS

AND

FAULT LOGIC

1

2

3

4

6

7

8

9

19

16

13

12

11

18

14

10

G2

G1

PGND

VDRV

GND

BST

SW

SYNCIN

RSET

REF

G2C

COMP

VEA−

TR

CEA−

G2S

UVLO

PWM

HUP

VERR

RAMP

CLK

ISET

17

SWS

5

RAMP

15

VDD

DRIVE

REGULATOR

VREF

SS

LOW SIDE

DRIVER

VDD

VDRV

VREF

PGND

20

PGND

HIGH SIDE

DRIVER

VREF

PWR

BIAS

PWR

G2 TIMER

G2

GLO

2 I SET

+

−

1.5V

2 I SET

1.33 I

SET

1.73 I

SET

100ns

G1D

UVLO

G2TO

G1D

VDRV

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