UTC3843A Datasheet Text
DataSheet.in
UTC UC3842A / 3843A LINEAR INTEGRATED CIRCUIT
CURRENT MODE PWM CONTROL CIRCUITS
DESCRIPTION
The UTC UC3842A/3843A provide the necessary functions to implement off-line or DC to DC fixed frequency current mode , controlled switching circuits with a minimal external part count
SOP-8
Features
- Low external part count.
- Low start up current ( Typical 0.12mA )
- Automatic feed forward pensation
- Pulse-by-Pulse current limiting
- Under-voltage lockout with hysteresis
- Double pulse Suppression
- High current totem pole output to drive MOSFET directly
- Internally trimmed band gap reference
- 500kHz operation
DIP-8
BLOCK DIAGRAM
7
Vcc
Vref
8
Internal Bias 1/2Vref
5V REF
S/R
5 GND
Vref Good Logic 1/3Vref U.V.L.O CURRENT SENSE PARATOR R PWM LATCH S
7
Vcc
VFB P...
