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STR3A426MD
Package : DIP8
RoHS : YES
The STR3A426MD is a power IC for switching power supplies, incorporating a MOSFET and a current mode PWM controller IC.
To enhance efficiency in all load ranges, the IC automatically shifts its operation to the green mode or burst oscillation mode, depending on the load. The product achieves high cost-performance power supply systems with few external components.
Data Download
Design Support
- Technical Documents
Technical Documents
Features
- Pb-free
- Low Thermal Resistance Package
- 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
- Soft Start Function
- Automatic Standby Function
Input Power at No Load, PIN < 15mW - Operation Mode
Normal Operation: PWM Mode
Light Load Operation: Green-Mode
Standby: Burst Oscillation Mode - Random Switching Function
- Slope Compensation Function (for Subharmonic Oscillation Suppression)
- Leading Edge Blanking Function
- Bias Assist Function
- Protections
Overcurrent Protection (OCP): Pulse-by-Pulse
Two Different OCPs, with Input Compensation Function
Overload Protection (OLP): Auto-restart
Overvoltage Protection (OVP): Auto-restart
Thermal Shutdown (TSD): Auto-restart with hysteresis
Application
- AC/DC adapter
- White goods
- Other SMPS
Specifications
| Control Method | PWM |
|---|---|
| Type | Power IC |
| Output Current | 49 W |
| RDS(ON) (max.) | 0.920 Ω |
| VDSS (min.) | 700 V |
| VCC (max.) | 32 V |
| Oscillating Frequency(typ.) | 65 kHz |
| OCP | YES |
| OLP | Auto Restart |
| OVP | Auto Restart |
| Brown-in / out | NO |
| TSD | Auto Restart |
| Power Consumption at No Load | <15mW |
| Package Weight (Typ.) | 0.51 g |
| Automotive Qualified | NO |
Typical Application
Block Diagram
Pin Configuration Definitions
Physical Dimensions
Selection Guide
STR3A420HD/MDSeries| Products | VDSS | RON | POUT (Open Frame) | fOSC |
|---|---|---|---|---|
| STR3A424HD | 700V | 1.4Ω | 40W | 100kHz |
| STR3A424MD | 1.4Ω | 40W | 65kHz | |
| STR3A426HD | 0.92Ω | 49W | 100kHz | |
| STR3A426MD | 0.92Ω | 49W | 65kHz |
Questions or Comments?
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