STR5A464D |Sanken Electric



Data Sheetdownload (PDF:1110.22KB)
Application Note


The STR5A460 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.


・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


・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
・No need for current detection resistor, building in a MOSFET used as current sense resistor
・Built-in Startup Function
・Built-in Error Amplifier
・Random Switching Function
・Leading Edge Blanking Function
・Soft Start Function
   Overload Protection (OLP): Auto-restart
   Overvoltage Protection (OVP): Auto-restart
   Thermal Shutdown with hysteresis (TSD): Auto-restart


STR5A460 Series

Products RON IDLIM Package
STR5A464D 13.6Ω 0.41A DIP8
STR5A464S 13.6Ω 0.41A SOIC8


Package Name:DIP8

Package Diagram

Design Support


Control MethodPWM
Output PowerIDLIM=0.41A
VCC Breakdown Voltage(Max.)32V
Oscillating Frequency(Typ.)60Hz

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Representative Circuit

Internal Block Diagram

Pin-Out Diagrams

Data Sheetdownload (PDF:1110.22KB)
Application Note
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