Semtech Corporation SC4812
The SC4812 is a highly integrated current mode PWM controller designed for isolated or non-isolated dc-dc converters in telecommunication and data communication applications. It minimizes the amount of external discrete components needed and leads to substantial cost and space saving converter designs. It is disabled during regular opera- tion and improves efficiency.| Part No. | SC4812 |
|---|---|
| Datasheet | SC4812 Download |
| Manufacturer |  Semtech Corporation |
| Description | Current Mode PWM Controller |
| Buy | Stock & Price |
DESCRIPTION
SC4812FEATURES
Wide input range 12V to 90V High-voltage start-up circuit Current mode control Transconductance error amplifier Leading-edge blanking Cycle by cycle current limit Programmable external soft-start Thermal shutdown SO-8 package. Fully WEEE and RoHS compliant The circuitry of the SC4812 includes an integrated high voltage start-up circuit suitable for telecom/industrial voltage applications. It is disabled during regular opera- tion and improves efficiency. Current mode control with leading-edge blanking simplifies control loop design and internal ramp compensation circuit stabilizes the current loop when operating above 50% duty cycle. Internal error amplifier could be used for non-isolated applications.APPLICATIONS
IP phones, PoE Telecom isolated converters Off-line isolated power supplies Instrumentation power supplies Battery chargers Typical Application Circuit Vin T1 C2 C3 R2 1 U1 D1 C1 Vout R1 C4 VIN VCC 8 Q1 7 5 6 R5 2 3 C5...
