资 源 简 介
The TDA 16846 is opTImized to control free running or fixed frequency flyback converterswith or without Power Factor CorrecTIon (Current Pump). To provide low powerconsumpTIon at light loads, this device reduces the switching frequency conTInuouslywith load, towards an adjustable minimum (e. g. 20 kHz in standby mode). Additionally,the start up current is very low. To avoid switching stresses of the power devices, thepower transistor is always switched on at minimum voltage. A special circuit isimplemented to avoid jitter. The device has several protection functions: VCC over- andundervoltage, mains undervoltage, current limiting and 2 free usable fault comparators.Regulation can be done by using the internal error amplifier or an opto coupler feedback(additional input). The output driver is ideally suited for driving a power MOSFET, but itcan also be used for a bipolar transistor. Fixed frequency and synchronized operationare also possible.
