DESCRIPTION
After several automatic restart attempts, a definitive shutdown of the circuit is done if the shortcircuit or over current persists over an externally adjustable time, until the TD230 is reset by temporary INHIBIT signal or temporary switching off of the power supply (hot disconnection/reconnection). If the board is disconnected from the positive supply by the TD230 it will automatically be disjoncted from the negative supply too. TD230 integrates an induction step-up converter that provides 13.5V above the positive rail to drive the high side MOSFET. October 1998 TD230I PIN CONNECTIONS P Vcc 1 16 15 14 13 12 11 10 9 REF1 GC1 S ENSP INHIBIT SHUTDOWN SENS N GC2 REF2 LBOOS T 2 CBOOST 3 OS CGND 4 PM1 GND PM2 NVcc 5 6 7 8 TD230 BLOCK DIAGRAM PVcc STEP -UP LBOOST o sc CBOOS T OS C GND R EF1 VSP 1 IP1 INHIBIT S W1 GC1 PVcc P M1 S E NSP IP 2 S HUTDOWN VSP 3 IP3 VSP 2 G ND VSN3 IN3 P M2 IN2 S ENSN VSN2 P Vcc P Vcc IN1 S W2 GC2 VSN1 R EF2 NVcc ABSOLUTE MAXIMUM RATINGS
Symbol VCC + P...
STMicroelectronics
