STK740-470 Datasheet (Sanyo Semicon Device) - 5V/5A Single Output Separate Excitation Chopper Regulator

STK740-470, 5V/5A Single Output Separate Excitation Chopper Regulator

Number Pin name Description No.6107 *3/10 STK740-470 Test Circuit 12 11 10 9 8 7 6 5 4 3 2 1 ON/OFF Vo adjust DC INPUT C1 FB L1 C2 OUTPUT (5V) GND C1 C2 L1 FB : 47µF/25V (OS capacitor) : 1000µF/16V×2 : 30µH : Ferrite-bead core GND Overvoltage Protection Circuit In a constant-vo

Ordering number:EN 6107 Thick Film Hybrid IC STK740-470 5V/5A Single Output Separate Excitation Chopper Regulator Preliminary Overview The STK740-470 is a separate-excitation step-down chopper regulator hybrid IC for the secondstage circuit.

This IC incorporates in the package all the necessary circuits for a chopper regulator including power switch, error amplifier, soft start, shutdown type output short protection, low-voltage malfunction prevention, on/off, and snubber circuits.

Therefo

STK740-470 Features

* Adoption of Sanyo IMST ; Insulated Metal Substrate Technology, allows the circuit to be operated without using a heat sink (see “No Fin Output Current Derating” chart in the page 6).

* Typical efficiency of 90% at DC 12V input, 2.5A output.

* Fine adjustment of output volta