PS501 datasheet(2/42 Pages) MICROCHIP

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PS501

DS21818C-page 2

 2004 Microchip Technology Inc.

1.0

PRODUCT OVERVIEW

The PS501 combines a high-performance, low-power

Microchip PIC18 microcontroller core together with

PowerSmart proprietary monitoring/control algorithms

and 3D cell models stored in 16 Kbytes of on-chip

reprogrammable Flash memory.

Analog resources include a 16-bit sigma-delta integrat-

ing A/D and mixed signal circuitry for precision

measurement of battery current, temperature and volt-

age and for direct connection to 4-cell series Lithium

Ion packs. On-chip EEPROM is provided for storage of

user customizable and “learned” battery parameters.

An industry standard 2-wire SMBus interface supports

host

communication

using

standard

SBData

commands and status.

Additional integrated features include a high accuracy

on-chip oscillator and temperature sensor. Twelve gen-

eral purpose pins support charge or safety control or

user programmable digital I/O. Eight of them can be

used as LED drivers and two are open drain for direct

FET drive.

The PS501 can be configured to accommodate all

Lithium rechargeable battery chemistries, including

Li Ion graphite, Li Ion hard carbon and Li Ion polymer,

with direct connection to 2 to 4 series cell configurations.

FIGURE 1-1:

PS501 INTERNAL BLOCK DIAGRAM

256-byte

EEPR O M

256-byte

EEPRO M

16-Kbyte

FLASH

16-Kbyte

FLASH

Regulator

Voltage

Reference

and

Tem perature

Sensor

Voltage

Reference

and

Temperature

Sensor

SMBus

Interface

SMBus

Interface

PIC18

M icrocontroller

Core

PIC18

M icrocontroller

Core

16-Bit

Sigm a-D elta

Integrating

A/D Converter

16-Bit

Sigm a-Delta

Integrating

A/D Converter

Analog

Input Mux

Analog

Input Mux

Programmable

Digital

Input/Output

Programmable

Digital

Input/Output

Silicon O scillator

ROSC

SMB-CLK

RSHN

VNTC

VDDA

1 2

VREFT

VDDD

SMB-D TA

VSSD

G PIO (11-0)

Digital Section

Analog

Section

VSSA

RSHP

VC(2-4)

VC(1)

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