TPD4125AK

2008-05-16

11

External Parts

Typical external parts are shown in the following table.

Part

Typical

Purpose

Remarks

25 V/2.2

μF

Bootstrap capacitor

(Note 1)

25 V/10

μF

(Note 2)

25 V/0.1

μF

(Note 2)

25 V/1

μF

(Note 2)

25 V/1000 pF

(Note 2)

5.1 k

Ω

DIAG pin pull-up resistor

(Note 3)

10 k

Ω

SD pin pull-up resistor

Note 1: The required bootstrap capacitance value varies according to the motor drive conditions. The capacitor is

Note 2: When using this product, adjustment is required in accordance with the use environment. When mounting,

place as close to the base of this product leads as possible to improve the ripple and noise elimination.

Note 3: The DIAG pin is open drain. If not using the DIAG pin, connect to the GND.

Handling precautions

（１）

Note that if the power supply is switched off as described above, this product may be destroyed if

disconnected by a relay or similar while the motor is still running.

（２）

The excess voltage such as the voltage surge which exceed the maximum rating is added, for

example, may destroy the circuit. Accordingly, be careful of handling this product or of surge voltage

in its application environment.