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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 | C | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTX2 Film Capacitors, Across the mains, 100 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | Capacitance100 nF | Safety ClassX2 | Rate of Voltage Rise300 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch10 mm | PackagingBulk | Capacitance±10% | SizePitch 10 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | Rated Voltage275 V (AC) | – | – | Length13 mm | Width7 mm | Height13 mm | MountBoxed THT | ||||
 | WE-FC Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FC Common Mode Power Line Choke | – | – | – | – | – | – | – | – | SizeUT20V | Operating Temperature -40 °C up to +125 °C | – | – | – | Rated Current0.8 A | Inductance13 mH | DC Resistance0.81 Ω | Rated Voltage250 V (AC) | Insulation Test Voltage2000 V (AC) | MaterialMnZn | Length21.3 mm | Width16.6 mm | Height22.5 mm | MountTHT | ||||
| WCAP-CSGP MLCCs 50 V(DC), –, 330 pF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance330 pF | – | – | – | Insulation Resistance10 GΩ | – | Packaging7" Tape & Reel | Capacitance±5% | Size0805 | Operating Temperature -55 °C up to +125 °C | Q-Factor1000 % | Ceramic TypeNP0 Class I | Pad Dimension0.5 mm | – | – | – | Rated Voltage50 V (AC) | – | – | Length2 mm | Width1.25 mm | Height0.6 mm | – |