PS4200 datasheet(2/8 Pages) MICROCHIP

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PS4200

DS21768A-page 2

Preliminary

 2003 Microchip Technology Inc.

1.0

GENERAL DESCRIPTION

The PS4200 module is a complete smart battery

controller subsystem based on the Microchip PS402

battery manager with patented Accuron™ technology.

The module is designed to operate in a battery pack

consisting of six (6) to ten (10) series connected

Ni-based cells. The module consists of the Microchip

PS402 battery manager IC with a four LED SOC

display and an optional connection for an external

thermistor.

1.1

Quick Start - Pack Assembly

Follow these directions to assemble a pack with the

PS4200 module.

• Use standard precautions when handling static

sensitive devices.

• Modules should be connected to battery cells in

the order indicated below to insure proper start-up

and operation. Wires should be attached to the

modules first and then connected to the battery

cells as instructed.

• The connection sequence is critical to successful

use of the PS402 family of CMOS ASICs. The

pack positive should be securely connected to the

module first, followed by pack negative.

Step 1:

Configure the module for optional external

thermistor

use.

PS4200

modules

are

shipped

configured to use the internal temperature sensor only.

To add an external thermistor to the board, remove

resistor R16 and connect the thermistor across vias TN

and TR.

Step 2: Connect wires to module. Use large diameter

wire (18 AWG-20 AWG) for current carrying lines from

VR and V1. All others are signal only lines (24 to 22

AWG).

Step 3: Connect V1 to the most positive point on the

battery cell stack.

Step 4: Connect VR to the most negative point on the

battery cell stack.

Step 5: Connect external connector to BN, T, C, D and

BP.

Step 6:

Program

the assembled pack

using

Microchip's PowerTool™ software and PowerCal™

board or PowerInfo™ board hardware.

The EEPROM parameters can be changed at will using

the utilities on the P4 EE page in the PowerTool

software. The OTP EPROM parameters can be

changed a limited number of times using utilities on the

P4 OTP page. To write to the OTP EPROM, an

additional voltage (VPP) must be applied to the PS402.

This programming voltage can be obtained from the

PowerInfo board and applied to the PS4200 at connec-

tion VP (small thru-hole) located on the small edge of

the board opposite the connector edge.

Step 7:

Calibrate the pack using the PowerTool

software and PowerCal board hardware. The pack is

now ready for use.

FIGURE 1-1:

CONNECTION POINTS (SIDE 1)

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