Texas Instruments BQ2003 Evaluation Module for NiCd/NiMH, linear DV2003L1 DV2003L1 数据表
产品代码
DV2003L1
Features
➤
bq2003 fast-charge control evaluation and
development
development
➤
Charge current sourced from an on-board linear
regulator (1.25A, modifiable for 0.1 to 1.5 A) or an
external current source
regulator (1.25A, modifiable for 0.1 to 1.5 A) or an
external current source
➤
Fast charge of 4 to 14 NiCd or NiMH cells
➤
Fast-charge termination by
∆T/∆t, -∆V, maximum
temperature, time, and voltage
➤
-
∆V enable, hold-off, top-off, maximum time, number
of cells, and off-board current source control are
jumper-configurable
jumper-configurable
➤
Charging status displayed on charge and
temperature LEDs
temperature LEDs
➤
Discharge-before-charge control with push-button
switch
switch
➤
Inhibit fast charge by external logic-level input
General Description
The DV2003L1 Development System provides a develop-
ment environment for the bq2003 Fast-Charge IC. The
DV2003L1 incorporates a bq2003 and an LM317 linear
regulator to provide fast charge control for 4 to 14 NiCd
or NiMH cells. The DV2003L1 also supports on/off con-
trol of an external current source.
ment environment for the bq2003 Fast-Charge IC. The
DV2003L1 incorporates a bq2003 and an LM317 linear
regulator to provide fast charge control for 4 to 14 NiCd
or NiMH cells. The DV2003L1 also supports on/off con-
trol of an external current source.
The fast charge is terminated by any of the following:
∆T/∆t, -∆V, maximum temperature, maximum time,
maximum voltage, or an external inhibit command.
maximum voltage, or an external inhibit command.
Jumper settings select the -
∆V enabled state, the hold-
off, top-off, and maximum time limits, and enable the
use of an external current source.
use of an external current source.
The user provides a power supply and batteries. If the
on-board 1.25A linear regulator is disabled, the external
current source must have an appropriate digitally con-
trolled switch (active high).
on-board 1.25A linear regulator is disabled, the external
current source must have an appropriate digitally con-
trolled switch (active high).
The user configures the
DV2003L1 for the number of cells, charge termination,
maximum charge time (with or without top-off), and
commands the discharge-before-charge option with the
push-button switch S1.
maximum charge time (with or without top-off), and
commands the discharge-before-charge option with the
push-button switch S1.
Connection Descriptions
J1
DC+
DC input from charger supply
GND
Ground
XTRKL
Extra trickle input
MOD
bq2003 MOD pin connection for
external control
external control
BAT+
Positive battery terminal and high side
of discharge load
of discharge load
BAT–
Negative battery terminal and
thermistor connection
thermistor connection
THERM
Thermistor connection
DSCHG
Low side of discharge load
J2
+V
Voltage source for inhibit input
IN
Inhibit input to prevent bq2003 activity
JP1 DVEN
Negative voltage termination enable
1
DV2003L1
Fast Charge Development System
Control of On-Board Linear Current Regulator
or External Current Source
3/98
Rev. B Board