TA84007FG データシートの表示（PDF） - Toshiba

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TA84007FG

DC Motor Full Bridge Driver ICs (Forward/reverse switching driver ICs)

Toshiba 

TA84007PQ/SG/FG

Usage Precautions

Power Input

When turning on the power, first apply power to VCC and then apply power to VS. (NOTE: It is also okay to

apply power to both at the same time.) When turning off the power, first turn off VS and then turn off VCC.

(NOTE: It is also okay to turn off both at the same time.)

Input Circuitry

As shown in the drawing, input is high-active.

When you apply the defined VIN (H) amount of

voltage (or greater), the logic will go high and if you

apply the defined VIN (L) amount of voltage (or

lower) the corresponding pin will be grounded and

logic will go low.

In addition, when logic is high, input current IIN

will be inputted so be careful of the prior stage’s

output impedance.

Input hysteresis is 0.7 V (typ.)

When turning on the power (VCC), keep input

(both IN1 and IN2) low.

VCC standby

VIN

VIN

1 kΩ

5/9/7

or

6/1/9

5 kΩ

1/5/1

Output Circuitry

Output “H” Voltage

• Vref Voltage Operation

The voltage applied to Vref is filtered through the

Vref circuit and the resulting 2VBE (small signal)

high voltage is applied to Q2 (Pw Tr)’s base-A. The

resulting VBE (Q2) low voltage is output as VOUT (H).

VOUT = Vref + 2VBE − VBE (Q2) @ Vref + 0.7 V

• About the Vref Pin

When you aren’t using the Vref pin, don’t leave it

open but rather connect it to the VS pin using

protective resistance (of 3 kΩ or higher).

Also, design your application so that Vref ≤ VS.

TA84007PQ/SG/FG

Q1

Q2

A

Vref

circuit

1/5/1

8/6/15

or 10/3/13

2/7/4 VOUT

4/8/5 Vref

Protector Function

TA84007PQ/SG/FG

Overcurrent Protection

If the current flowing to the upper power transistor is detected as being over the configured current threshold

(about 2.5 A), the overcurrent protector turns off all output. However, this doesn’t protect against all potential

overcurrent scenarios. For example, it is possible to destroy the IC due to an output short-circuit or grounding

fault prior to the overcurrent protector even being activated. Please connect a resistor or fuse to the power (VS)

line as protection against such overcurrent scenarios. (Refer to the application example on the next page.)

Thermal Shutdown

If the chip’s temperature is detected as being over the configured temperature threshold (about 170°C), the

thermal shutdown circuit turns off all output.

9

2006-3-6

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