BA6289F 데이터 시트보기 (PDF) - ROHM Semiconductor

부품명

상세내역

제조사

BA6289F

Reversible motor driver

ROHM Semiconductor 

Motor driver ICs

BA6289F / BA6417F

(10) In-rush current

There are no circuits built into these ICs that prevent in-

rush currents. Therefore, it is recommended to place a

current limiting resistor or other physical countermea-

sure.

(11) Factors regarding the thermal, power supply, and

motor conditions

If the potential of the output pin sways greatly and goes

below the potential of ground, the operation of the IC may

malfunction or be adversely affected. In such a case,

place a diode between the output and ground, or other

measure, to prevent this.

(12) HIGH level output voltage setting pin

The output voltage can be varied by controlling the Vref

voltage :

VOH=Vref+VBE (PNP)–VBE (NPN)+(VOUT–Vref offset)

(13) The input pins (pins 4 and 5 have temperature de-

pendent characteristics. Take the temperature effect into

consideration when using the IC.

(14) To eliminate motor noise, connect a capacitor be-

tween OUT1 (pin 1) and GND and between OUT2 (pin 7)

and GND. Alternatively, connect a capacitor between

OUT1 and OUT2, and also a diode between OUT1 and

GND and between OUT2 and GND.

The voltage applied to the Vref pin should not exceed the

motor supply voltage (pin 2) or the VCC voltage. The Vref

input range over which the HIGH level output voltage can

be controlled according to the above equation is between

0V and (VCC–VSAT–VBE).

The output may oscillate if the Vref voltage is controlled by

a low-impedance circuit. Set the voltage by either provid-

ing an impedance of about 10kΩ or connecting a capaci-

tor between the Vref and GND pins. Because the optimum

impedance and capacitance values depend on such fac-

tors as the type of motor, the PCB pattern, and the load

current, the values must be determined separately for

each application.

(13) Thermal shutdown circuit

When the thermal shutdown circuit is activated at the IC

junction temperature of about 175_C (typical), all driver

outputs are turned OFF. There is a temperature differ-

ence of about 15_C (typical) between the temperatures

at which the circuit is activated and deactivated.

458

Share Link: