Texas Instruments UCC35702PWTR

Voltage Mode PWM Controller 1A 700kHz 14-Pin TSSOP T/R

Surface Mount ROHS3Compliant Transistor Driver Step-Up Step-Up/Step-Down DC to DC switching controller 0C~70C TA 100kHz 8.8V~15V

Pulse Width Modulation (PWM) Controller IC; Output Current:100mA; Frequency:700kHz; Supply Voltage Range:10V to 13V; Digital IC Case Style:TSSOP; No. of Pins:14; Operating Temperature Range:0°C to +70°C; Control Mode:Voltage

The UCC35701/UCC35702 family of pulse width modulators is intended for isolated switching power supplies using primary side control. They can be used for both off-line applications and DC/DC converter designs such as in a distributed power system architecture or as a telecom power source. The devices feature low startup current, allowing for efficient off-line starting, yet have sufficient output drive to switch power MOSFETs in excess of 500kHz. Voltage feed forward compensation is operational over a 5:1 input range and provides fast and accurate response to input voltage changes over a 4:1 range. An accurate volt-second clamp and maximum duty cycle limit are also featured. Fault protection is provided by pulse by pulse current limiting as well as the ability to latch off after a programmable number of repetitive faults has occurred. Two UVLO options are offered. UCC35701 family has turn-on and turn-off thresholds of 13V/9V and UCC35702 family has thresholds of 9.6V/8.8V. The UCC35701/2 and the UCC25701/2 are offered in the 14 pin SOIC (D), 14 pin PDIP (N) or in 14 pin TSSOP (PW) packages. The UCC15701/2 is offered in the 14 pin CDIP (J) package.