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UL497 Datasheet(PDF) 3 Page - Unisonic Technologies |
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UL497 Datasheet(HTML) 3 Page - Unisonic Technologies |
3 / 8 page UL497 Preliminary LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 3 of 8 www.unisonic.com.tw QW-R118-015.a PIN DESCRIPTION (Cont.) PIN NO. PIN NAME DESCRIPTION 11 DWELL CONTROL The average voltage on the capacitor CW connected between this pin and ground depends on the motor speed and the voltage supply. The comparison between V CW and V CT voltage determines the timing for the dwell control. 12 BIAS CURRENT The internal current which used to drive the external capacitors of the dwell control(pin10 and11)permanent conduction protection (pin 9) and slow recovery time (pin 8) can be set by a resistor(recommended 62KΩ) connected between this pin and ground. 13 CURRENT SENSING Connection for the Coil Current Limitation. The current limitation value is given by : Isens=0.32×(R10+R11)÷(RS×R11) RS: sensing resistor 14 DRIVER EMITTER OUTPUT Current Driver for the External Darlington. 15 OVER VOLTAGE LIMIT The internal divider R3/R2 defines the limitation value given by: VOVP=(22.5/R3+5×10 -3)×R2+22.5 16 DRIVER COLLECTOR INPUT Through this pin The collector current of the internal driver which drives the external limits darlington is supplied. Then the external resistor R6 the maximum current supplied to the base of the external darlington. |
Similar Part No. - UL497_15 |
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Similar Description - UL497_15 |
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