Ordering number:EN*6107
Thick Film Hybrid IC
STK740-470
5V/5A Single Output Separate Excitation Chopper Regulator
Prel...
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. Therefore, external components required are input and output capacitors and a choke coil only and this allows this IC to be used to construct a large-current (5A) chopper
regulator as if a 3-pin
regulator were used. DC8V to 18V input voltage can be handled and up to 5A of output current is supported.
Package Dimensions
unit:mm 4170-SIP28
[STK740-470]
46.6 41.2 8.5
12.7
1 2.54 (6.63)
4.0
12 0.5
1.0
3.6
25.5
0.4 2.9
Applications
Local power supply for the equipment of which input rating is DC9V to 15V.
11×2.54=27.94
SANYO : SIP-28
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 voltage enable. 50 kHz operating frequency. Low-RON resistance power MOSFET adopted. Low-VF
Schottky barrier diode adopted.
Any and all SANYO products described or contained...