STR6A100HZ
STR6A100HZ is Off-Line PWM Controllers manufactured by Sanken.
Description
The STR6A100HZ series are power ICs for switching power supplies, incorporating a 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-performance power supply systems with few external ponents.
Features
- 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
- Brown-in and Brown-out Function
- No Load Power Consumption, PIN < 25m W
- Automatically changed operation mode in response to load conditions
- Fixed switching frequency mode, 100 k Hz (typ.) in normal operation.
- Green mode, 25 k Hz (typ.) to 100 k Hz (typ.) in middle to light load.
- Burst oscillation mode in light load.
- Random Switching Function
- Slope pensation Function
- Leading Edge Blanking Function
- Bias Assist Function
- Protections
- Two Types of Overcurrent Protection (OCP): Pulse-by-Pulse, built-in pensation circuit to minimize OCP point variation on AC input voltage
- Overload Protection with timer (OLP): Ato restart
- Overvoltage Protection (OVP): Latch shutdown
- Thermal Shutdown (TSD): Latch shutdown
Typical Application
VAC BR1
C1 ROCP C4
RC C3
PC1
T1
D51
U1
1 S/OCP
D/ST 8
2 BR
D/ST 7
3...
