TEA5170 - ST Microelectronics

TEA5170 SWITCH-MODE POWER-SUPPLY

The TEA5170 is designed to work in the secondary part of an off-line SMPS, sending pulses to the slaved TEA2260/61 which are located on the primary side of the main transformer. An accurate regulated voltage is obtained by duty cycle control. The TEA5170 can be externally synchronized by higher or lower frequency signal, then it could be used in applications.

Features

APACITOR GROUND GND E OUT VOLTAGE ERROR AMPLIFIER OUTPUT VOLTAGE ERROR AMPLIFIER E INVERTING INPUT 5170-01.EPS September 1993 1/9 TEA5170 BLOCK DIAGRAM Rt 8 Comparator Ct 7 OSCILLATOR LOGIC (SYNCHRO) POWER OUTPUT STAGE 2.7V Csf 1 SOFT START AND DUTY CYCLE LIMITING PWM LOGIC Error Amplifier E- 5 x -1 PWM 2V V CC Monitor 6 Eout 4 GND 2 V CC 3 P out 5170-02.EPS ABSOLUTE MAXIMUM RATINGS Symbol VCC Tj Tstg Supply Voltage Operating Junction Temperature Storage Temperature Range Parameter Value 15 150
  – 40, + 150 Unit V °C °C 5170-01.TBL 5170-03.TBL 5170-02.TBL THERMAL DATA Symbol Rth .