TPD4135K

2010-09-27

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)

0.2

Ω ± 1 % (1.5 W)

Current detection

(Note 2)

25 V/10

μF

(Note 3)

25 V

/0.1 μF

(Note 3)

25 V/1

μF

(Note 3)

25 V/1000 pF

(Note 3)

5.1 k

Ω

DIAG pull-up resistor

(Note 4)

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

Do not exceed a detection current of 3 A when using this product.

(Please go from the outside in the over current protection.)

Note 3: 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 4: 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 RS pin connecting the current detection resistor is connected to a comparator in the IC and also

functions as a sensor pin for detecting over current. As a result, over voltage caused by a surge

voltage, for example, may destroy the circuit. Accordingly, be careful of handling the IC or of surge

voltage in its application environment.