TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8198F
DC / DC Converter For Electric Tuning (3V USE)
The TA8198F is a DC / DC converter IC which is developed for biasing varactor diodes of tuner system. It is especially suitable for supplying high voltage (about 15.5V) for digital tuning (FM / TV / AM) system of headphone stereos, radio cassette recorders, or other equipments.
Features
· Few external parts.
· Excellent spurious radiation by oscillation of sine wave.
· Built−i.
DC/DC CONVERTER FOR ELECTRIC TUNING
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8198F
DC / DC Converter For Electric Tuning (3V USE)
The TA8198F is a DC / DC converter IC which is developed for biasing varactor diodes of tuner system. It is especially suitable for supplying high voltage (about 15.5V) for digital tuning (FM / TV / AM) system of headphone stereos, radio cassette recorders, or other equipments.
Features
· Few external parts.
· Excellent spurious radiation by oscillation of sine wave.
· Built−in constant current source, it is suitable for digital tuning system. (ICTL can be controlled by RCTL)
· Output voltage VO = 15.5V (typ.)
Weight: 0.09g (typ.)
· Excellent regulatory capability of output voltage against fluctuation of supply voltage, and of ambient temperature.
· Built−in power switch
· Low supply current (at non−load, VCC = 3V, Ta = 25°C) ICCQ = 2.4mA (typ.)
· Operating supply voltage range (Ta = 25°C) VCC (opr) = 1.8~10V
Block Diagram
TA8198F
※ Handle with care to prevent devices from deterioration by static electricity.
1 2002-10-30
TA8198F
Terminal Explanation Terminal Voltage: Typical Terminal Voltage with Test Circuit (VCC = 3V, Ta = 25°C)
Terminal Terminal No. Name
Function
Internal Circuit
Terminal Voltage (V)
1 DET
―
2 VO
Boosted output (voltage double rectifier)
15.5
5 CF
1.4
3 ICTL 4 CTL
Constant current source output (for digital tuning)
VO supplies this circuit with power source.
In case that this circuit isn't used, the ICTL terminal .