PS402-01XX datasheet(2/46 Pages) MICROCHIP

2 / 46 page

PS402-01XX

DS21766A-page 2

 2003 Microchip Technology Inc.

1.0

PRODUCT OVERVIEW

The PS402 is a fully integrated IC for battery manage-

ment that combines a proprietary microcontroller core

together with monitoring/control algorithms and 3D cell

models stored in 12 Kbytes of on-chip OTP EPROM.

Additional features include: precision 15-bit A/D and

mixed signal circuitry. On-chip EEPROM is provided for

storage of user-customizable and "learned" battery

parameters. An industry standard 2-wire SMBus v1.1

interface supports host communication using standard

SBData v1.1 commands and status.

The PS402 can be configured to accommodate all

Nickel rechargeable battery chemistries including

Nickel Metal Hydride and Nickel Cadmium. Future

versions will be added to support Pb-Acid.

Additional integrated features include an optional, high

accuracy on-chip oscillator and temperature sensor.

Eight general purpose pins support charge or safety

control, SOC LED display or user-programmable digital

I/O.

Microchip’s PS402 achieves the highest Smart Battery

Data accuracy in a single IC, providing space and total

system component cost savings for a wide variety of

portable systems.

FIGURE 1-1:

PS402 INTERNAL BLOCK DIAGRAM

128 byte

EEPROM

128 byte

EEPROM

12 Kbyte

OTP EPROM

12 Kbyte

OTP EPROM

Regulator

Voltage

Reference

and

Temperatur

Voltage

Reference

and

Temperature

Sensor

SMBus

Interface

SMBus

Interface

Microcontroller

Core

Microcontroller

Core

15-Bit

Sigma-Delta

Integrating

A/D Converter

15-Bit

Sigma-Delta

Integrating

A/D Converter

Analog

Input Mux

Analog

Input Mux

Programmabl

Digital

Programmable

Digital

Input/Output

Silicon Oscillator

ROSC

SMB-CLK

RSHN

VNTC

VDDA

VREFT

VDDD

VPP

SMB-DTA

VSSD

GPIO(7-0)

Digital Section

Analog Section

VSSA

RSHP

VC(1)

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