POWER BLOCK
This power system is a Hybrid IC with a built-in power transistor and a separate excitation control IC,
designed for converter type switch m ode power supply application, The IC is capable of quasi-resonant
mode and requires sm all num ber of external com ponents, and sim plifies circuit design.
It is very syitable for downsizing and standardization of power supplies.
1. POW ER IC (STR-S5708) BLOCK DIAGRAM
2. PIN DESCRIPTION
PIN NO SYMBOLNAMEFUNCTION
1CCOLLECTORPOWER TR COLLECTOR
2GNDGROUNDGROUND (POWER TR EMITTER)
3BBASEPOWER TR BASE
4SINKSINKBASE CURRENT (IS) INPUT
5OCPOVER C PROTECTIONOVER CURRENT SENSING SIGNAL INPUT
6INHINHIBIT/LATCHSYNC, OFF TIME/LATCH CIRCUIT CONTROL INPUT
7F/B(SENS)SENSINGCONSTANT VOLTAGE CONTROL SIGNAL INPUT
8DRIVEDRIVEBASE DRIVE CURRENT (ID) OUTPUT
9VINVINSUPPLY VOLTAGE FOR CONTROL CIRCUIT
31 |