DV2054S2_14 Datasheet, PDF (1/5 Pages) List of Unclassifed Manufacturers – Li-Ion Charger Development System Control of On-Board PNP Switch-Mode Regulator

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
➤ Jumper-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.
Fast charge termination occurs on:
Minimum current – IMAX divided by 10, 20, or 30
Maximum time-out
The bq2054 can be reset and a new charge cycle started
by applicaton of power to the board or battery replace-
ment.
The user provides a DC power supply and batteries
and configures the board for the number of cells, the
minimum current threshold, and the LED display
mode. The board has direct connections for the battery
and the provided thermistor.
Before using the DV2054S2 board, please review the
bq2054 data sheet.
Connection Descriptions
J1
DC+
DC-
J2
BAT+
TEM+
BAT-
JP1
JP2
JP3
Charger supply positive (24VDC max.)
Charger supply ground
Positive battery terminal
Postive thermistor connections
Negative battery terminal and
thermistor connecton.
Display mode selection
Number of cells selection
Full and minimum current termination
select
SLUU024–APRIL 1999
Rev. B Board
1