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STR5A453D

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.

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)=0.9A W
RDS(ON) (max.) 1.900 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 Latch
Power Consumption at No Load

Typical Application

Typical Application

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Physical Dimensions

Physical Dimensions

Questions or Comments?

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