KA3031 데이터 시트보기 (PDF) - Fairchild Semiconductor

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KA3031

6-Channel Motor Drive IC

Fairchild Semiconductor 

KA3031

4. REGULATOR & RESET FUNCTION

The regulator and reset circuits are as illustrated in Figure 1.

where R1=R2.

• The external circuit is composed of the transistor, KSB772 and a capacitor, about 33[µF]. The capacitor is used as a ripple

eliminator and should have good temperature characteristics.

• The regulator output voltage (pin 46) is decided as follows.

Vout = 2 × 2.5 = 5[V] (where R1 = R2)

• When the voltage of pin 43 (Vreset) is at 5[V], the regulator output voltage (pin 46) because 5[V]. If the voltage

of pin 43 is 0[V], the output voltage of pin 46 because 0[V].

VCC

KSB772

REG OUT

+

33µF

Vreset

2.5V

+

−

47 46 44 43

39

R1

R2

KA3031

Figure 1. Regulator circuit

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