SD4938 is a current mode PWM controller with 150V MOSFET used for SMPS.
SD4938 integrates high-voltage start-up circuit. It enters burst mode at light load to reduce the system standby power dissipation; the frequency reduction function optimizes the conversion efficiency at light load; the soft startup function reduces the stress of device to avoid transformer saturation.
SD4938 features various protections, including VDD undervoltage protection, VDD overvoltage protection, lead edge blanking, over current protection, over temperature protection, etc. Meanwhile, if any protection occurs, the circuit will continue to restart automatically until the system recovers.
Input voltage: 20V~150V
Adjustable output voltage including: 12V, 15V and 18V
Output current: 0.5A
High-voltage self-startup
Burst mode at light load
Frequency reduction
Soft startup
VDD undervoltage protection
VDD overvoltage protection
Leading edge blanking
Output overload protection
Over current protection
Over temperature protection
Product Name | Package form | Marking | Hazardous Substance Control | Packing Type | Remarks |
---|---|---|---|---|---|
SD4938 | SOP-8-225-1.27 | SD4938 | Halogen free | Tube | |
SD4938TR | SOP-8-225-1.27 | SD4938 | Halogen free | Tape & Reel |
title | Types of | Size (KB) | date | Download the latest English version |
---|---|---|---|---|
SD4938 | 236 | 2023-12-27 | SD4938简要版说明书 |