Description
The STR6S161HXD is power IC for switching power
supplies, incorporating a power MOSFET and a current
mode PWM controller IC.
The operation mode is automatically changed, in
response to load, to the fixed switching frequency, to the
switching frequency control, and to the burst oscillation
mode. Thus, the power efficiency is improved.
The product achieves high cost-effective power
supply systems with few external components.

Features
● Pb-free (RoHS compliant)
● Improving circuit efficiency (Since the step drive
control can keep VRM of secondary rectification
diodes low, the circuit efficiency can be improved by
low VF)
● Current Mode Type PWM Control
● AC Input Voltage Detection Function
- Overvoltage Protection Function (HVP)
- Brown-In and Brown-Out Function
● No Load Power Consumption, PIN < 40 mW
● Automatically changed operation mode in response to
load conditions
- Fixed switching frequency mode, 100 kHz (typ.) in
normal operation.
- Green mode, 25 kHz (typ.) to 100 kHz (typ.) in
middle to light load.
- Burst oscillation mode in light load.
● Random Switching Function
● Slope Compensation Function
● Leading Edge Blanking Function
● Bias Assist Function
● Protections
- Two Types of Overcurrent Protection (OCP):
Pulse-by-Pulse, built-in compensation circuit to
minimize OCP point variation on AC input voltage
- Overload Protection with timer (OLP): Auto-restart
- Overvoltage Protection (OVP): Auto-restart
- Thermal Shutdown (TSD): Auto-restart

Applications
● White Goods
● Office Automation Equipment
● Audio Visual Equipment
● Industrial Equipment
● Other Switched Mode Power Supplies