M54649L 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

부품명

상세내역

제조사

M54649L

DUAL Bi-DIRECTIONAL MOTOR DRIVER

MITSUBISHI ELECTRIC  

MITSUBISHI <CONTROL / DRIVER IC>

M54649L

DUAL Bi-DIRECTIONAL MOTOR DRIVER

CAUTIONS

1. Input Circuit Format

For ON voltage (VIH), apply a voltage of 3.5V to VCC1. For OFF

voltage (VIL), apply a voltage of 0 to 1V.

When the input voltage is approx. 7.8V or more, the impedance

changes to approx. 5 k . Therefore, set the voltage to 7V or less.

VCC1

5k

NC

To internal circuit

6. ASO Curve

2.0

1.6

1.0

0

0

Time of continuity : 50msec

4

8

12

14

16

20

Voltage between collector and emitter : VCE (V)

∼–

VZ

7.8V

10k

From internal

circuit

GND

2. Output Voltage Control

The output control circuit by VR pin is as shown in the diagram

below. A voltage almost equal to the voltage at VR pin is output (to

the high-level side).

The maximum output voltage is achieved with VCC2 VCC1 when VR

pin is opened, and the voltage is given by the following formula:

VO = VCC1-Vsat(Tr1)-VBE(Tr2)-VBE(Tr3)

In this status, the output voltage can be controlled by varying VCC1.

7. Others

The capacitance between the power supply and the ground should

be placed at a position close to the IC, if possible. If it is placed far

away from the IC, oscillation may take place.

When the motor back electromotive force is large with the brakes

applied, for example, malfunction may occur in internal parasitic Di.

If flyback current of 1A or more flows, add Schottky Di to the

portion between the output and the GND.

When the IC is used at a high speed for PWM, etc., note that

switching of output results in delay of approx. 10µs.

Tr1

Tr2

VCC1

VCC2

Tr3

OUT

VR

3. Caution for Braking

As soon as the status of a rotating motor is switched to the brake

status, other motor may be adversely affected. Be careful when

the IC is actually used.

4. Allowable Power Dissipation

The allowable power dissipation of IC (Pd) is calculated by the

following formula, with VCC2 VCC1:

Pd = VCC1xICC1+IO {(VCC2-VOH)+VOL}

Make a design in such a way that the power dissipation cannot

exceed the maximum allowable power dissipation.

5. Thermal Shutdown

To prevent thermal breaking with excessive power applied, this IC

is equipped with a thermal shutdown circuit.

When the temperature of the IC chip reaches 150˚C (125˚C min.),

this function works. When the IC is placed in the all output OPEN

mode, and the temperature goes down to 100˚C (125˚C max.), this

function is released.

Since the thermal protection function of this IC may not work in

abnormal status (oscillation, low supply voltage, output short-

circuit, etc.), check the operation in the IC installation status when

using this function.

Share Link: