BA6209N

更新时间： 2024-02-25 15:46:45

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BA6209N 技术参数

Motor driver ICs

BA6209 / BA6209N

FCircuit operation

Input / output truth table

(3) Rush current absorption circuit

When a high voltage (caused by such as a motor rever-

sal) is generated on OUT1 and OUT2, an internal

comparator detects the high voltage and turns on an in-

ternal circuit that absorbs rush currents.

(4) Drive circuit

The forward direction of the motor connected between

OUT1 and OUT2 corresponds to the current flow from

OUT1 to OUT2, and the reverse direction corresponds to

the current flow from OUT2 to OUT1. The output voltage

(V^OUT) applied to the motor is given by the equation :

V^OUT(V) = VZD * VCE (sat.) = VZD * 0.2 (IOUT = 100mA)

where V^ZDis the zener voltage of the constant voltage

diode (ZD) connected to pin 4.

Forward / reverse control, forced stop, and rush current

absorption are controlled by the combination of F^INand

R^INinput states.

(1) Forward / reverse control circuit

When F^INis HIGH and RIN is LOW, current flows from

OUT1 to OUT2. When F^INis LOW and RIN is HIGH, cur-

rent flows from OUT2 to OUT1 (refer to the truth table).

(2) Forced stop circuit

If V^refis left OPEN, the output voltage (VOUT) is given by

the equation :

V^OUT(V) = VCC1 * VCE (sat.) (PNP) * 2VF * VCE (sat.)

By setting R^INand FIN both HIGH or both LOW, power

supply to the motor is shut down and a brake is applied

by absorbing the motor counter-electromotive force.

= V^CC1 * 1.8 (IOUT = 100mA)

FPin descriptions

390

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