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8380 / TDA8380A / philips control circuit
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Control circuit for switched mode power supplies
The TDA8380A is an integrated circuit intended for use as a control circuit in low-cost switched mode power supplies for television, monitors and small industrial equipment. The TDA8380A operates using duty factor regulation in the fixed frequency mode.
A low-current initialization circuit (maximum 150 mA) which can be switched off
Circuitry for slow-start combined with an accurate setting of the maximum duty factor (Dmax)
Programmable low supply voltage protection with one default value
High supply protection circuitry
Error amplifier with a transfer characteristic generator (TCG)
Primary current protection circuitry for both cycle-by-cycle and trip mode
Protection against transformer saturation
A direct drive output stage (sink current 2.5 A, source current 0.75 A)
Protected against damage as a result of a short-circuited high-voltage transistor
RC oscillator with synchronization input
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