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)
- Voltage gain of each channel
4-CH input resistances are as follows,
CH1, CH3, CH4 : 11K ohm
CH2
: 7.5K ohm
So, the voltage gain is calculated as following equation.
GV 134 = 20 log | 55K |
R + 11K
GV 2 = 20 log | 110K |
R + 7.5K
* R is an external resistor which is connected to input pins (pin17,18,20,22)
- Power supply voltage
IP9001 has two kinds of power supply pins. One is power supply for output stage(pin36), the others are
signal power supply for pre driver(pin12, pin15). All power supply pins should be attached by-pass capacitor
with each other.
2. DC/DC converter
- Output voltage
IP9001 has internal buck/boost control circuit and the output voltage is calculated as follows,
Figure1. output voltage set up method
R1× R3
VCC1 = Vref
× (1 +
R1
R2
+
×
R
R
3
4
)
R2 + R4
* vref =1.2V
* R1 : External resistor
* R2 : External resistor
* R3 : 35K ohm
* R4 : 21K ohm
If there is no external resistor,
Then default VCC1 value is as follows,
VCC1default = Vref × (1 + R3 ) = 1.2 × (1 + 35K ) = 3.2V
R4
21K
September. 2003 (Rev.0)
www.interpionsemi.com
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