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IP4011

5-CH MOTOR DRIVE IC

Interpion semiconductor 

IP4011

5-CH MOTOR DRIVE IC

The level shifter changes the direction of the current(Iconv) as the same amount,

and then supply it to the power AMP.

The resistor Ra(10.6K) converts current into voltage with the DC offset of Pref.

Vin- Vref

Va=20K x

+Pref

10k

Vin- Vref

- Va =-20K x

+Pref

10k

when

Pref

VCC1

=

- Vbe

2

The power amp has unity gain.

So the total differential voltage gain of the IP4002 is as follows,

Vin- Vref

Vin- Vref

{[20k x

+Pref]- [(-)20k x

+Pref]}

Gain=20log

10k

10k

Vin- Vref

= 12dB

If you want to reduce the total gain of the BTL drive part, use additional series resistor into the

input pin(pin#3, 10,19,25)

You can also increase or decrease the voltage gain of the CH1, CH4 using adjustable pin

(pin#4, pin24) by inserting an external series resistor.

August. 2002 (Rev.5)

WWW.INTERPIONSEMI.COM

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