The SDH7520SN is a high performance power factor correction (PFC) controller. The circuit operates in Critical conduction mode (BCM) under high load values. For light loads, it will operate in DCM.
SDH7520SN adopts high voltage power supply, and removes auxiliary winding by adopting MOS gate zero crossing detection technology.
It uses patented COMP-saving capacitor technology to achieve excellent power factor correction and constant voltage output with only a few peripheral components, which greatly reduces the system cost.
It provides various protections, such as output over voltage protection, output under voltage protection, CS cycle-by-cycle current limit and over temperature protection etc.
Single winding inductor booster system with reduced periphery
High voltage start-up and power supply
Gate Zero-crossing detection and critical conduction mode
Fixed on time control
Light load frequency reduction control
Patented closed-loop control technology, without peripheral compensation network, anti-moisture and anti-leakage
VCC under-voltage lockout
Output overvoltage protection and output under voltage protection
CS cycle-by-cycle current limit
Over temperature protection
| Product Name | Package form | Marking | Hazardous Substance Control | Packing Type | Remarks |
|---|---|---|---|---|---|
| SDH7520SNTR | SOP-8-225-1.27 | 7520SN | Halogen free | Tape & Reel | |
| SDH7520SN | SOP-8-225-1.27 | 7520SN | Halogen free | Tube |

| title | Types of | Size (KB) | date | Download the latest English version |
|---|---|---|---|---|
| SDH7520SN | 0 | 2025-10-30 | SDH7520SN Brief Datasheet |