ACTIVE
STR5A451D
Package : DIP8
RoHS : YES
The STR5A450 Series is power ICs for switching power supplies, incorporating a MOSFET and a current mode PWM controller IC for non-isolated Buck converter and Inverting converter topologies.
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 components.
Data Download
Design Support
- Technical Documents
- Related Information
Technical Documents
Related Information
Features
-
・Buck converter
・Inverting converter
・Current mode type PWM control
・Automatically changed operation mode in response to load
conditions
Fixed switching frequency mode, 60 kHz (typ.)
Green mode, 23 kHz (typ.) to 60 kHz (typ.)
Burst oscillation mode
・Built-in Startup Function
・Built-in Error Amplifier
・Random Switching Function
・Leading Edge Blanking Function
・Soft Start Function
・Protections
Overcurrent Protection (OCP): adjustabe by an external
resistor
Overload Protection (OLP): Auto-restart
Overvoltage Protection (OVP): Auto-restart
Thermal Shutdown with hysteresis (TSD): Auto-restart
Application
・White goods・Auxiliary power supply (lighting equipment with
microcomputer, etc.)
・Power supply for motor control (actuator, etc.)
・Telecommunication equipment (convertible from 48VDC
to 15VDC)
・Other Switching mode power supply, SMPS
Specifications
| Control Method | PWM |
|---|---|
| Type | Power IC |
| Output Current | IOUT(MAX)=0.7A W |
| RDS(ON) (max.) | 4.000 Ω |
| VDSS (min.) | 650 V |
| VCC (max.) | 32 V |
| Oscillating Frequency(typ.) | 60 kHz |
| OCP | YES |
| OLP | Auto Restart |
| OVP | Auto Restart |
| Brown-in / out | NO |
| TSD | Auto Restart |
| Power Consumption at No Load | |
| Package Weight (Typ.) | 0.51 g |
| Automotive Qualified | NO |
Typical Application
Block Diagram
Pin Configuration Definitions
Physical Dimensions
Selection Guide
STR5A450 SeriesVDSS(MIN)=650V
DIP8 package
| Products | RON | IOUT(MAX) |
|---|---|---|
| STR5A451D | 4.0Ω | 0.71A |
| STR5A453D | 1.9Ω | 0.9A |
Questions or Comments?
Please feel free to contact us if you cannot find the desired product from the lineup.