ACTIVE
STR3A251D
3D CAD Data
The STR3A200 series are power ICs for switching power supplies, incorporating a MOSFET and a current-mode PWM controller IC.
The products achieve low power consumption and low standby power by including a startup circuit and a standby function that automatically switch operation modes – PWM mode in normal operation and burst-oscillation mode under light-load conditions.
Well-equipped with protection functions, the products also enable power supply systems to be more cost-effective with only a few external components.
Features
-
・Low Thermal Resistance Package
・Current Mode Type PWM Control
・Soft Start Function
・Auto Standby Function
No Load Power Consumption < 15mW
・Operation Mode
Normal Operation: PWM Mode
Standby: Burst Oscillation Mode
・Random Switching Function
・Slope Compensation Function
・Leading Edge Blanking Function
・Bias Assist Function
・Protections
Overcurrent Protection (OCP): Pulse-by-Pulse
Overload Protection (OLP): Auto-restart
Overvoltage Protection (OVP): Auto-restart
Thermal Shutdown (TSD): Auto-restart
Application
-
・AC/DC adapter
・White goods
・Other SMPS
Specifications
| Control Method | PWM |
|---|---|
| Type | Power IC |
| Output Current | 23 W |
| RDS(ON) (max.) | 4.000 Ω |
| VDSS (min.) | 650 V |
| VCC (max.) | 32 V |
| Oscillating Frequency(typ.) | 67 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 |
Typical Application
Block Diagram
Pin Configuration Definitions
Physical Dimensions
Selection Guide
STR3A200 Series LineupVdss=650V
fosc=67kHz
| Products | OVP,TSD |
|---|---|
| STR3A25x | Latched shutdown |
| STR3A25xD | Auto Restart |
| Products | Ron | Pout* |
|---|---|---|
| STR3A251/51D STR3A253/53D STR3A255/55D | 4.0Ω 1.9Ω 1.1Ω | 23W 35W 44W |
Questions or Comments?
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