TA8126S

TA8126S / F TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8126S,TA8126F DC / DC Converter For Electric Tuning (3V USE) The TA8126S,TA8126F are DC /DC converter ICs, which are designed for biasing varactor diodes of tuner system. Those items are especially suitable for supplying high voltage (about 15V / 30V) for electric tuning (FM / TV / UHF / AM) system of headphone stereos, radio cassette recorders, or other equipments. Features · Excellent regulatory capability of output voltage against fluctuation of supply voltage, and of ambient temperature. · Excellent spurious radiation by oscillation of sine wave. · Output voltage can be switched over to 15V or 30V by one−make switch, and is applicable to 10V, too. · Few external parts. · Low supply current (at non−load,VCC = 3V, Ta = 25°C) ICCQ1 = 2.4mA (typ., VO = 15V mode) ICCQ2 = 3.0mA (typ., VO = 30V mode) · Operating supply voltage range (Ta = 25°C) VCC1 (opr) = 1.8~10V, (VO = 15V mode) VCC2 (opr) = 2.0~10V, (VO = 30V mode) Block Diagram Weight SIP9−P−2.54C: 0.72g (typ.) SSOP10−P−225−1.00: 0.09g (typ.) 1 2002-10-30 Block Diagram TA8126S / F Terminal Explanation Terminal Voltage: Typical Terminal Voltage with Test Cirucuit (VCC = 3V, Ta = 25°C) Pin No. S / F Pin Name 1/ 6 NC Contents ― Equivalent ― Terminal Voltage (V) ― 2/7 4/9 FB OSC ・Hartley type oscillator fOSC = 2p 1 L3 C2 ・Controlling oscillation current at the terminal of FB 1.4 3.0 3/8 5 / 10 6/1 7/2 8/3 9/4 VCC GND DET VO ― ― ・Boos...