Switch Mode Secondary Side Post Regulator

The UCC3583 is a synchronizable secondary side post Regulator for preci- sion regulation of the auxiliary outputs of multiple output power supplies. It contains a leading edge pulse width Modulator which generates the Gate drive signal for a FET power Switch connected in series with the rectifying Diode The turn-on of the power Switch is delayed from the leading edge of the secondary power pulse to regulate the output voltage. The UCC3583 contains a ramp generator slaved to the secondary power pulse, a voltage error Amplifier a current error Amplifier a PWM Comparator and associ- ated Logic a Gate driver, a precision reference, and protection circuitry. The ramp discharge and termination of the Gate drive signal are triggered by the synchronization pulse, typically derived from the falling edge of the transformer secondary voltage. The ramp starts charging again once its low threshold is reached. The Gate drive signal is turned on when the ramp voltage exceeds the control voltage. This leading edge modulation tech- nique prevents instability when the UCC3583 is used in peak current mode primary controlled systems. The controller operates from a floating power supply referenced to the out- put voltage being controlled. It features an undervoltage lockout (UVLO) circuit, a soft start circuit, and an averaging current limit Amplifier The cur- rent limit CAN be programmed to be proportional to the output voltage, thus achieving foldback operation to minimize the dissipation under short circuit conditions . By Texas Instruments
UCC1583 's PackagesUCC1583 's pdf datasheet



UCC1583 Pinout, Pinouts
UCC1583 pinout,Pin out
This is one package pinout of UCC1583,If you need more pinouts please download UCC1583's pdf datasheet.

UCC1583 Application circuits
UCC1583 circuits
This is one application circuit of UCC1583,If you need more circuits,please download UCC1583's pdf datasheet.


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