Datasheet > DV2054S2

DV2054S2

更新时间： 2024-11-30 01:23:51

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描述
Li-Ion Charger Development System Control of On-Board PNP Switch-Mode Regulator

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DV2054S2 数据手册

DV2054S2

Li-Ion Charger Development System

Control of On-Board PNP Switch-Mode Regulator

Features

➤ bq2054 fast-charge control evaluation and

development, based on switching buck converter with

low-side battery-current sensing

➤ On-board configuration for fast charge of 1, 2, 3, or 4

Li-Ion cells

➤ Charge termination by selectable minimum current,

or maximum time-out

➤ Constant current (up to 1.25A) and constant voltage

(up to 16.8V) provided by on-board switch-mode

regulator

➤ J umper-configurable LED display

➤ Direct connections for battery and thermistor

➤ Maximum charge time of 5 hours

General Description

The DV2054S2 Development System provides a develop-

ment environment for the bq2054 Lithium Ion Fast-

Charge IC. The DV2054S2 incorporates a bq2054 and a

buck-type switch-mode regulator to provide fast charge

control for 1 through 4 Li-Ion cells.

Fast charge is preceded by a pre-charge qualification pe-

riod.

Connection Descriptions

Fast charge termination occurs on:

Minimum current – I_MAXdivided by 10, 20, or 30

Maximum time-out

J 1

DC+

DC-

Charger supply positive (24VDC max.)

Charger supply ground

The bq2054 can be reset and a new charge cycle started

by applicaton of power to the board or battery replace-

ment.

J 2

BAT+

TEM+

BAT-

Positive battery terminal

The user provides a DC power supply and batteries

and configures the board for the number of cells, the

m in im u m cu r r en t t h r esh old, a n d t h e LE D displa y

mode. The board has direct connections for the battery

and the provided thermistor.

Postive thermistor connections

Negative battery terminal and

thermistor connecton.

J P1

J P2

J P3

Display mode selection

Number of cells selection

Before using the DV2054S2 board, please review the

bq2054 data sheet.

Full and minimum current termination

select

SLUU024–APRIL 1999

Rev. B Board

12 3 4 5

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