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Overview
| Topology | Buck Converter |
| Input voltage | 85-265 V |
| Switching frequency | 0.05-0.06 kHz |
| Output 1 | 24 V / 1 A |
| IC revision | 1.0 |
Description
The STR5A450 Series is power ICs for switching power supplies, incorporating a MOSFET and a current mode PWM controller IC for non-isolated Buck converters 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.
Features
・Buck converter・Inverting converter・Current mode type PWM control・Automatically changed operation mode in response to loadconditions 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 externalresistor Overload Protection (OLP): Auto-restart Overvoltage Protection (OVP): Auto-restart Thermal Shutdown with hysteresis (TSD): Auto-restart
Typical applications
- White goods
- Telecommunication equipment (convertible from 48VDC to 15VDC)
- Auxiliary power supply (lighting equipment with microcomputer, etc.)
- Power supply for motor control (actuator, etc.)
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | Application | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | Tol. C | Size | Operating Temperature | Q | Ceramic Type | Fl (mm) | IR (A) | L (mH) | RDC max. (Ω) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 890324023023 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-FTX2 Film Capacitors | Across the mains | 100 nF | X2 | 300 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 10 | Bulk | ±10% | Pitch 10 mm | -40 °C up to +105 °C | – | – | – | – | – | – | 275 | – | – | 13 | 7 | 13 | Boxed THT | ||
 | 7448640415 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-FC Common Mode Power Line Choke | – | – | – | – | – | – | – | – | – | – | UT20V | -40 °C up to +125 °C | – | – | – | 0.8 | 13 | 0.81 | 250 | 2000 | MnZn | 21.3 | 16.6 | 22.5 | THT | ||
 | 885012007060 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | 330 pF | – | – | – | 10 GΩ | – | – | 7" Tape & Reel | ±5% | 0805 | -55 °C up to +125 °C | 1000 | NP0 Class I | 0.5 | – | – | – | 50 | – | – | 2 | 1.25 | 0.6 | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 890324023023 | SPEC | |
| 7448640415 | SPEC | |
| 885012007060 | SPEC |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | Application | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | Tol. C | Size | Operating Temperature | Q | Ceramic Type | Fl (mm) | IR (A) | L (mH) | RDC max. (Ω) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples |
|---|