DESCRIPTION

The UTC UC3844/3845 are化呢 high performance fixed frequency cur上窗rent mode controllers that specifica煙學lly designed for Off-Line and 報是DC to DC converter applications wi信新th minimal external parts coun站聽t. The differences betwe民信en UC3844 and UC3845 are 書高the maximum duty cycle ranges and裡畫 under-voltage locko好話ut thresholds. The UC3844公書 ideally suited to off-line app多鐘lications with UVLO thresholds of地技 16V(ON) and 10V(OFF), and UC紅通3845 has UVLO thresholds of 8報靜.5V(ON) and 7.6V(OFF) for是土 lower voltage applications子他.

FEATURES

* Operation output switching frequ大生ency up to 500 kHz

* Output deadtime adjust費下able from 50% to 70%

* Automatic feed forward com年外pensation

* Latching PWM for c行是ycle-by-cycle current 動些limiting

* High current totem pole output

* Internally trimmed reference with刀費 under voltage lockout

* UVLO with hysteresis

* Low startup and operating習器 current

ORDERING INFORMATION Order 如新Number Normal Lead Free Plating Packa短從ge Packing UC3844-D08-T UC3844L-D白技08-T DIP-8 Tube UC3844-S08-R UC3844L-玩錯S08-R SOP-8 Tape Reel UC3844-S08-T UC吧畫3844L-S08-T SOP-8 Tube UC384聽信5-D08-T UC3845L-D08-T DIP-8 Tube UC384線學5-S08-R UC3845L-S08-R 為的SOP-8 Tape Reel UC3845-S08-T UC38飛雨45L-S08-T SOP-8 Tube美放