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TA8126F

Toshiba Semiconductor
Part Number TA8126F
Manufacturer Toshiba Semiconductor
Description DC/DC CONVERTER FOR ELECTRIC TUNING
Published Dec 8, 2014
Detailed Description TA8126S / F TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8126S,TA8126F DC / DC Converter For Electric ...
Datasheet PDF File TA8126F PDF File

TA8126F
TA8126F

Overview
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 ― ― ・Boosted output (voltage double rectifier) VO = 15V / 30V SW1 SW2 ・Output voltage mode Switchover ON: VO = 15V OFF: VO = 30V ― 3.
0 ―0 ― ― ― ― - / 5 NC ― ―― 2 2002-10-30 Application Note 1.
These ICs have the output voltage by means of boosting the oscillation voltage, derived from hartley type oscillator circuit and of voltage-double rectifier with C3, D1, and D2.
(1) Designing of oscillation frequency fOSC≒ 2F 1 L3 C2 (2) Coil turns can be designed as following: VOSC (p-p) = 2 (VCC (min)...


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