TPS2456 datasheet(6/31 Pages) TI

номер детали	TPS2456

подробное описание детали	Dual 12 V Protection / Blocking Controller

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производитель	TI [Texas Instruments]

домашняя страница	http://www.ti.com

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TPS2456

SLVSA78A – MARCH 2010 – REVISED MARCH 2010

www.ti.com

PIN FUNCTIONS

TYPE

A/B(1)

DESCRIPTION

NAME

NO.

SENPA

1

I

A

Input voltage sense – connect to input supply. Connect to the source side of RSENSEA.

Connect RSETA from the input supply to SETA to program the current limit in conjunction with RSENSEA

SETA

2

I

A

and RMONA (see text).

SENMA

3

I

A

Connect this pin to the load side of the RSENSEA. The fast-trip threshold equals 100 mV / RSENSEA.

VINT

4

I/O

–

Connect a bypass capacitor (e.g., 0.01µF) to GND for this internal supply.

Connect RMONA from MONA to GND to set the current limit in conjunction with RSENSEA and RSETA (see

MONA

5

I/O

A

text).

ORENA

6

I

A

Blocking transistor enable, active high.

GND

7

GND

–

Connect pin to ground.

GND

8

GND

–

Connect pin to ground

Connect RMONB from MONB to GND to set the current limit in conjunction with RSENSEB and RSETB (see

MONB

9

I/O

B

text).

CTB

10

I/O

B

Connect CTB from CTB to GND to set the fault timer period (see text).

GAT2B

11

O

B

Blocking transistor gate drive.

OUTB

12

I/O

B

Output voltage monitor and bias input.

GND

13

GND

B

Connect pin to ground.

ORENB

14

I

B

Blocking transistor enable, active high.

GAT1B

15

O

B

Protection transistor gate drive.

SENMB

16

I

B

Connect this pin to the load side of the RSENSEB. The fast-trip threshold equals 100 mV / RSENSEB.

Connect RSETB from input supply to SETB to program the current limit program the current limit in

SETB

17

I

B

conjunction with RSENSEB and RMONB (see text).

SENPB

18

I

B

Input voltage sense – connect to input supply. Connect to the source side of RSENSEB.

INB

19

PWR

B

Control power input – connect to input supply.

–

20

–

No connection.

FLTB

21

O

B

Fault output, active low, asserted when B fault timer runs out.

PGB

22

O

B

Power good output, active low, asserts when VOUTB > 10.63 V.

GND

23

GND

–

Connect pin to ground.

GND

24

GND

–

Connect pin to ground.

GND

25

GND

–

Connect pin to ground.

PGA

26

O

A

Power good output, active low, asserts when VOUTA > 10.63 V.

FLTA

27

O

A

Fault output, active low, asserted when A fault timer runs out.

GND

28

GND

–

Connect pin to ground.

ENB

29

I

B

Enable, (active high).

GAT1A

30

O

A

Protection transistor gate drive.

ENA

31

I

A

Enable, (active high).

GND

32

GND

A

Connect pin to ground.

OUTA

33

I/O

A

Output voltage monitor and bias input.

GAT2A

34

O

A

Blocking transistor gate drive.

CTA

35

I/O

A

Connect CTA from CTA to GND to set the fault timer period (see text).

INA

36

PWR

A

Control power input – connect to input supply.

PAD

–

Solder pad to GND.

(1)

Specifies whether this pin is part of A channel, B channel, or is common to both (-).

6

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