Fast Charge Controller for NiCd/NiMH Batteries
Description
U2402B
Fast Charge Controller for NiCd/NiMH Batteries
Description
The fast-charge battery controller circuit, U2402B, uses bipolar technology.
The IC enables the designer to create an efficient and economic charge system.
The U2402B incorporates intelligent multiple-gradient batteryvoltage monitoring and mains phase control for power management.
With automatic top-off charging, the integrated circuit ensures that the charge device stops regular charging, before the critical stage of overcharging is achieved.
It has two LED driver indications for charge and temperature status.
Features
D D D D D D D
Multiple gradient monitoring Temperature window (Tmin/Tmax) Exact battery voltage measurement without charge Phase control for charge-current regulation Top-off and trickle charge function Two LED outputs for charge status indication Disabling of d2V/dt2 switch-off criteria during battery formation
Applications
D Portable power tools D Laptop/notebook personal computer D Cellular/cordless phones D Emergency lighting systems D Hobby equipment D Camcorder
Package: DIP18, SO20
16 (18) 14 (15) 13 (14) 12 (13) 11 (12)
D Battery-voltage check
18 (20) 17 (19)
Sync
ö
C
ö
R
VRef 6.
5 V/10 mA Oscillator Status control 3 (3)
Phase control Vöi 4 (4)
Scan path
1 (1)
Trigger output
Control unit
Gradient d2V/dt2 and –dV
Battery detection VRef = 5 V 10 (11) VBatt Monitor 0.
1 to 4 V
Power - on control
15 (17) 2 (2)
Power supply VS = 8 to 26 V
160 mV Ref
Temp.
control Sensor Tmax
Charge break output
94 8585
5 (5)
6 (6)
7 (8)
8 (9)
9 (10) ( ) SO 20, Pins 7 and 16 NC
Figure 1.
Block diagram
TELEFUNKEN Semiconductors Rev.
A3, 14-Nov-96
1 (17)
U2402B
Pinning
Package: DIP18 Output 1 18 Vsync 17 öC 16 öR 15 V S 14 VRef 13 Osc 12 STM.
11 LED1 10 VBatt
Pin Description
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Symbol Output GND LED2 Vöi OPO OPI Tmax Sensor tp VBatt LED1 STM.
Osc VRef VS ö
R C
GND 2 LED2 Vö...
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