AIC1783A

AIC1783A Battery Charge Controller for Low Power Charging „ FEATURES z Fast Charge Control of NiMH/NiCd Batteries. z Fast Charge Termination by: −ΔV, 0ΔV Safety Timer, Maximum Voltage. z Protection against Battery Voltage Fault. z Pulsed Trickle Charge Mode. z Quick and Easy Testing for Production. z 8-pin DIP or SO Packages. „ APPLICATIONS Battery Fast Chargers for: z Mobile Phones. z Notebook and Laptop Personal Computers. z Portable Power Tools and Toys. z Portable Communication Equipment. z Portable Video & Stereo Equipment. „ DESCRIPTION The AIC1783A fast charge controller IC is designed for intelligent charging of NiMH or NiCd batteries without the risk of overcharge. −ΔV detection (-0.25%) and 0ΔV detection (peak voltage timer) are the primary methods employed by the AIC1783A to terminate fast charge. The fast charge can also be cut off by maximum battery voltage along with the safety timer to prevent charging under fault conditions of the charging system or the battery itself. The safety timer period is adjustable for flexible usage that AIC1783A could be applied in the wide range of battery capacity. Test mode is provided for charger manufactures to dramatically reduce production test time. „ TYPICAL APPLICATION CIRCUIT VIN=5V R3 10K D3 LL4148 2SC4672 R2 0.5 Q1 D1 D2 R1 680 + LL4148 C1 LL4148 47μF 2 Cells NiMH/NiCd R6 R4 100K 68K C2 R5 220K 4.7μF R7 100K U1 1 REF VCC 8 2 TIMER VBT 7 C3 R8 0.1μF 120K R9 3 MODE ICON 6 200K 4 GND LED 5 AIC1783A LED1 R10 68...