1563CN

www.DataSheet4U.com AIC1563 Versatile DC/DC Converter FEATURES 3V to 30V Input Voltage Operation. Internal 2A Peak Current Switch. 1.5A Continuous Output Current. Bootstrapped Driver. High Side Current Sense Capability. High Efficiency (up to 90%). Internal ±2% Reference. Low Quiescent Current at 1.6mA. Frequency Operation from 100Hz to 100KHz. DESCRIPTION The AIC1563 is a monolithic control circuit containing the primary functions required for DC to DC converters and highside-sensed constant current source. The device consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current sense circuit, bootstrapped driver, and high current output switch. This device is specifically designed to construct a constant current source for battery chargers with a minimum number of external components. Bootstrapped driver can drive the NPN output switch to saturation for higher efficiency and less heat dissipation. The AIC1563 can deliver 1.5A continuous current without requiring a heat sink. APPLICATIONS Constant Current Source for Battery Chargers. Saver for Cellular phones. Step-Down DC-DC Converter Module. TYPICAL APPLICATION CIRCUIT R1 1K D2 1N1418 R2 120 3C 1µF 220µH L D1 1N5821 + 220µF DC DE CF 470pF CT GND BOOST IS VCC FB RA 5.6K RB 33K CO C5 10µF D3 1N5819 (%) *RS IO 100 V IN = 16V, V O= 12V + 90 VIN + 220µF C1 V IN= 16V, V O= 8V 80 70 0 0.5 1 1.5 2 AIC1563 *IO=300mV/RS Efficiency vs Output Current Io (...