IP9001 View Datasheet(PDF) - Interpion semiconductor
Part Name
Description
MFG CO.
'IP9001' PDF : 32 Pages View PDF
IP9001
4-CH MOTOR DRIVE IC FOR PORTABLE CDP
APPLICATION SUMMARY (Continued)
3. PWM power supply driving circuit
Power supply driving circuit detects a maximum output voltage among the 4-CH output pins, and then
control external PNP TR to reduce the power consumption.
This buck converter consists of external PNP TR, Schottky barrier diode, Inductor, and capacitors.
Figure2. PWM power supply driving circuit
4. Empty detector circuit
When the sensing voltage of SENS(pin1) falls below detecting voltage, then EMP(pin35) goes from High
level to low level. The detector voltage has 50mV hysteresis.
According to the SEL(pin42) voltage level, the detector voltage varies as following table,
SEL
LOW
High-impedance
Detector voltage
2.2V typ
1.8V typ
Table4. EMP detector voltage
Return voltage
2.25V typ
1.85V typ
September. 2003 (Rev.0)
www.interpionsemi.com
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