PS402-01XX datasheet(1/46 Pages) MICROCHIP

Part #	PS402-01XX

Description	Single Chip Battery Manager - Nickel Chemistries

PDF	46 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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 2003 Microchip Technology Inc.

DS21766A-page 1

PS402-01XX

Features

• Single chip solution for rechargeable battery

management

• Embedded Microchip patented Accuron™

technology provides precise capacity reporting

(within 1%) for all rechargeable battery

chemistries

• User configurable and "learned" parameters

stored in on-chip 128 x 8 EEPROM; fully field

re-programmable via SMBus interface

• Integrating sigma-delta A/D converter accurately

measures:

- Current through sense resistor (15-bits)

- High voltage (18V) battery cells directly

connected to pack voltage input (11-bits)

- Temperature measurement from on-chip

sensor or optional external thermistor

(11-bits)

• Integrated precision silicon time base

• Eight individually programmable input/output pins

that can be assigned as

- Charge control I/O

- Safety function I/O

- SOC LED output drive pins

- General purpose I/O

• Full SMBus v1.1 2-wire host interface

• Microchip firmware in 12 Kbytes of customizable

on-chip OTP EPROM

Pin Description

Pin Summary

Pin Name

Type

Description

VDDD,

VSSD

Supply

Digital supply voltage input,

ground

GPIO(0..7)

I/O

Programmable digital I/O

SMB-CLK,

SMB-DTA

I/O

SMBus Interface

VC(1)

I

Pack voltage input

VDDA, VSSA

Supply

Voltage regulator output

(internally connected to

analog supply input);

ground

RSHP, RSHN

I

Current sense resistor input

VNTC

I

External thermistor input

VREFT

O

Thermistor reference

voltage

ROSC

I

Internal oscillator bias

resistor

RSV1-7

I

Reserved pins

VPP

I

OTP programming voltage

VDDD

GPIO(4)

GPIO(5)

GPIO(6)

GPIO(7)

SMB-CLK

SMB-DTA

RSV5

RSV6

RSV7

VC(1)

VDDA

VSSA

RSHP

VSSD

GPIO(3)

GPIO(2)

GPIO(1)

GPIO(0)

RSV1

VPP

RSV2

RSV3

RSV4

ROSC

VREFT

VNTC

RSHN

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

28-pin SSOP Package (0.209 mil)

Single Chip Battery Manager - Nickel Chemistries

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