KA8301 데이터 시트보기 (PDF) - Fairchild Semiconductor

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KA8301

Bi-Directional DC Motor Driver

Fairchild Semiconductor 

KA8301

Application Information

1. FORWARD AND REVERSE CONTROL LOGIC

Pin #5

L (0.7V ↓)

L (0.7V ↓)

H (2.0V ↑)

H (2.0V ↑)

Pin #6

L (0.7V ↓)

H (2.0V ↑)

L (0.7V ↓)

H (2.0V ↑)

Pin #2

L

L

H

H

Pin #10

L

H

L

H

Function

Brake

Reverse

Forward

Brake

• If pin #5=H, pin #6=L, load current flows from pin #2 to pin #10 through a motor.

• If pin #5=L, pin #6=H, load current flows from pin #10 to pin #2 through a motor.

• If pin #5=pin #6=L or pin #5=pin #6=H, the KA8301 stops supplying the power to motor while absorbing counter EMF

from the motor as a brake.

2. RUSH CURRENT RESTRICTING CIRCUIT

If a high voltage generated during reversing operation is applied across pin #2 and pin #10, an internal comparator activates

the rush current restricting circuit.

3. DRIVE CIRCUIT

In the forward mode, the drive circuit supplies a load current to the motor from pin #2 to pin #10.

In the reverse mode, it supplies the current from pin #10 to pin #2.

The output voltage (VOUT) applied to the motor is given by the followings;

VOUT = VZD − VCE(sat), where VZD: a zener voltage applied to pin #4

If pin #4 is left open, the output voltage is given by the followings;

VOUT = VCC1 − VCE(sat, pnp) − 2VF − VCE(sat)

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