Low Power Pulse Width Modulator

The UCC1570 UCC2570 UCC3570 family of pulse width Modulators is intended for application in isolated switching supplies using primary side control and a voltage mode feedback loop. Made with a BiCMOS process, these devices feature low startup current for efficient off-line starting with a bootstrapped low volt- age supply. Operating current is also very low; yet these devices maintain the ability to drive a Power MOSFET Gate at frequencies above 500kHz. Voltage feedforward provides fast and accurate response to wide line volt- age variation without the noise sensitivity of current mode control. Fast cur- rent limiting is included with the ability to latch off after a programmable number of repetitive faults has occurred. This allows the power supply to ride through a temporary overload, while still shutting down in the event of a permanent fault. Additional versatility is provided with a maximum duty cycle clamp programmable within a 20% to 80% range and line voltage sensing with a programmable window of allowable operation. By Texas Instruments
UCC1570 's PackagesUCC1570 's pdf datasheet
UCC1570J
UCC2750N




UCC1570 Pinout, Pinouts
UCC1570 pinout,Pin out
This is one package pinout of UCC1570,If you need more pinouts please download UCC1570's pdf datasheet.

UCC1570 Application circuits
UCC1570 circuits
This is one application circuit of UCC1570,If you need more circuits,please download UCC1570's pdf datasheet.


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