L6229DP View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

L6229DP

DMOS driver for 3-phase brushless DC motor

STMicroelectronics 

L6229

11

Application information

Application information

A typical application using the L6229 device is shown in Figure 23. Typical component

values for the application are shown in Table 9. A high quality ceramic capacitor (C2) in the

range of 100 nF to 200 nF should be placed between the power pins VSA and VSB and

ground near the L6229 device to improve the high frequency filtering on the power supply

and reduce high frequency transients generated by the switching. The capacitor (CEN)

connected from the EN input to ground sets the shutdown time when an overcurrent is

detected (see Section 10: Non-dissipative overcurrent detection and protection). The two

current sensing inputs (SENSEA and SENSEB) should be connected to the sensing resistor

RSENSE with a trace length as short as possible in the layout. The sense resistor should be

non-inductive resistor to minimize the di/dt transients across the resistor. To increase noise

immunity, unused logic pins are best connected to 5 V (high logic level) or GND (low logic

level) (see Table 5: Pin description on page 6). It is recommended to keep power ground

and signal ground separated on PCB.

Table 9. Component values for typical application

Component

Value

C1

C2

C3

CBOOT

COFF

CPUL

CREF1

CREF2

CEN

CP

D1

D2

R1

R2

R3

R4

RDD

REN

RP

RSENSE

ROFF

RPUL

RH1, RH2, RH3

100 µF

100 nF

220 nF

220 nF

1 nF

10 nF

33 nF

100 nF

5.6 nF

10 nF

1N4148

1N4148

5.6 K

1.8 K

4.7 K

1 M

1 K

100 K

100 

0.6 

33 K

47 K

10 

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