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| Regulator ICs Switching regulator for electronic tuning BA6161N / BA6161F The BA6161N and BA6161F are switching regulators that contain a temperature compensation circuit. They can be used for electronic tuning DC-DC converters. FApplications Electronic tuners in televisions and other electronic equipment that requires high voltage (30X45V). FFeatures 1) Output changes are small against input voltage variations. 2) Temperature compensation circuit provides stable output. FBlock diagram 3) Reduced number of attached parts. FPin descriptions 261 Regulator ICs FAbsolute maximum ratings (Ta = 25_C) BA6161N / BA6161F FElectrical characteristics (unless otherwise noted, Ta = 25_C and Vin = 9.0V) FMeasurement circuit 262 Regulator ICs FCircuit operation A zener diode on the feedback pin provides reference voltage and compensates for temperature changes. Feedback current is fed from the zener diode to the oscillator. BA6161N / BA6161F Blocking oscillation is provided by connecting the external coil L between the oscillator drive pin and the VIN pin. The potential at the oscillator drive pin can be raised by using this oscillation. The output voltage is constant because the feedback current is always supplied to the oscillation circuit. FApplication example FOperation notes (1) When an output voltage greater than the reference output voltage (33.3V) is required, use a variable resistor (Murata RVG6P02-104M or equivalent product) with good temperature characteristics as shown in the application circuit. Make sure, however, that the voltage of the oscillator drive pin does not exceed 42V. (2) The coil to be connected between pins 2 and 3 should have the lowest possible DC resistance (under 10) and an inductance of 4.7mH (Sumida Electronics RC095-472K or equivalent product). 263 Regulator ICs FElectrical characteristics curves BA6161N / BA6161F 264 Regulator ICs FExternal dimensions (Units: mm) BA6161N / BA6161F 265 |
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