The UCC3807 family 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.
The UCC3807 family offers a variety of package options, temperature range options, and choice of critical voltage levels. The family has UVLO thresholds and hysteresis levels for off-line and battery powered systems. Thresholds are shown in the table below.
|Part number||Order||Topology||Control method||VCC (Min) (V)||VCC (Max) (V)||Frequency (Max) (kHz)||UVLO thresholds on/off (V)||Duty cycle (Max) (%)||Gate drive (Typ) (A)||Features||Rating||Operating temperature range (C)||Package Group||Package size: mm2:W x L (PKG)|
Leading Edge Blanking
|Catalog||0 to 70||
PDIP | 8
SOIC | 8
See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)