Battery Charge Controller
AIC1781A Battery Charge Controller
n FEATURES
n DESCRIPTION
l Fast Charge Control of NiMH/NiCd Batteries, even with a...
Description
AIC1781A Battery Charge Controller
n FEATURES
n DESCRIPTION
l Fast Charge Control of NiMH/NiCd Batteries, even with a Fluctuating Charging Current.
l Fast Charge Termination by: ∆T / ∆t , −∆V , 0∆V , Safety Timer, Maximum Temperature, Maximum Voltage.
l Linearly Adjustable ∆T / ∆t Detection Slope and Safety Timer.
l Adjustable Peak Voltage Timer for 0∆V . l Battery Voltage Protection Range Selectable. l Selectable Battery Temperature Protection
Mode. l Protection against Battery Voltage and Battery
Temperature Faults. l Selectable LED Display Mode for Battery Status. l Five Pulsed Trickle Charge Modes. l Discharge-before-Charge Function Available for
Eliminating Memory Effect. l Quick and Easy Testing for Production. l 16-pin DIP or SO Packages.
n APPLICATIONS
Battery Fast Chargers for: l Mobile Phones. l Notebook and Laptop Personal Computers. l Portable Power Tools and Toys. l Portable Communication Equipments. l Portable Video & Stereo Equipments.
1.55 Charge Current = 600 mA Cell Capacity = 550 mA NiMH Battery
1.45
100 80
Cell Voltage 1.35
60
Cell Voltage (V) Temperature (°C)
1.25 Temperature
1.15 0
10 20 30 40 50
Charge Time (min.)
40
20 60
Fig. 1
Battery Charging Characteristics Resulting from an AIC1781A-Controlled Charger with a Fluctuating Charging Current
The AIC1781A fast charge controller IC is
designed for intelligent charging of NiMH or NiCd
batteries without the risk of overcharge. −∆V
Detection
(-0.25%), 0∆V detection (peak
voltage timer) ...
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