UCC3807

The UCC3807 is designed as one kind of high speed, low power integrated circuits contains all of the control and drive circuitry required for off-line and DC-to-DC fixed frequency current mode switching power supplies with minimal external parts count.These devices are similar to the UCC3800 family,but with the added feature of a user programmable maximum duty cycle.Oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor.The UCC3807 family also features internal full cycle soft start and internal leading edge blanking of the current sense input.Features of the UCC3807 are:(1)user programmable maximum PWM duty cycle;(2)100 A startup current;(3)operation to 1MHz;(4)internal full cycle soft start;(5)internal leading edge blanking of current sense signal;(6)1A totem pole output.

The absolute maximum ratings of the UCC3807 can be summarized as:(1)supply voltage:13.5V;(2)supply current:30mA;(3)out current:±1A;(4)analog inputs (FB, CS):-0.3V to (VDD +0.3V);(5)power dissipation at TA +25°C (N or J packages):1W;(6)power dissipation at TA +25°C (D package):0.65W;(7)storage temperature:-65°C to +150°C;(8)junction temperature:-65°C to +150°C;(9)lead temperature (soldering,10 sec.):+300°C.If you want to know more information such as the electrical characteristics about this part,please download the datasheet in www.seekic.com and www.chinaicmart.com .