SSC3S937
SSC3S937 is LLC Current-resonant Off-line Switching Controller manufactured by Sanken.
Description
The SSC3S937 is a controller with SMZ- method for LLC current resonant switching power supplies, incorporating a floating drive circuit for a high-side power MOSFET. The IC includes useful functions such as standby function, automatic dead time adjustment, and capacitive mode detection. The IC achieves high efficiency, low noise and high cost-effective power supply systems with few external ponents.
- SMZ: Soft-switched Multi-resonant Zero Current switch, achieved soft switching operation during all switching periods.
Features
- Pb-free (Ro HS pliant)
- Standby Mode Change Function by External Signal
▫ Output Power at Light Load: PO = 150 m W (PIN = 0.27 W)
▫ Burst Operation in Standby Mode ▫ Soft-on/Soft-off Function: Reduces Audible Noise
- Soft-start Function
- Capacitive Mode Detection Function
- Reset Detection Function
- Automatic Dead Time Adjustment Function
- Built-in Startup Circuit
- X-capacitor Discharge Function (AC Input Mode)
- Input Capacitor Discharge Function (DC Input Mode)
- Protections
- Input Voltage Protection
Input Overvoltage Protection (HVP): Auto-restart Input Undervoltage Protection (UVP): Auto-restart
- High-side Driver UVLO: Auto-restart
- Overcurrent Protection (OCP): Auto-restart, Peak Drain Current Detection, Two Types Protection
- Overload Protection (OLP): Auto-restart
- VCC Pin Overvoltage Protection (VCC_OVP): Auto-restart
- REG Pin Overvoltage Protection (REG_OVP): Auto-restart
- Thermal Shutdown (TSD): Auto-restart
Typical Application
X-Cap PFC OUT
VSEN VCC FB SB CSS CL RC CD
MODE
5 U1 14
VGH VS VB
REG VGL GND
Package
SOP18
Not to scale
Applications
Switching power supplies for electronic devices such as:
- Digital Appliances (e.g., Television)
- Office Automation (OA) Equipment (e.g.,...
