L6226Q datasheet(17/29 Pages) STMICROELECTRONICS

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L6226Q

Application information

Doc ID 14335 Rev 5

17/29

Application information

A typical application using L6226Q is shown in Figure 14. Typical component values for the

application are shown in Table 8. A high quality ceramic capacitor in the range of 100 to 200

nF should be placed between the power pins (VSA and VSB) and ground near the L6226Q

to improve the high frequency filtering on the power supply and reduce high frequency

transients generated by the switching. The capacitors connected from the ENA/OCDA and

ENB/OCDB nodes to ground set the shut down time for the bridge A and bridge B

respectively when an over current is detected (see overcurrent protection). The two current

sources (SENSEA and SENSEB) should be connected to power ground with a trace length

as short as possible in the layout. To increase noise immunity, unused logic pins are best

connected to 5 V (high logic level) or GND (low logic level) (see pin description). It is

recommended to keep power ground and Signal Ground separated on PCB.

Table 8.

Component values for typical application

Component

Value

100 nF

100 µF

CBOOT

220 nF

10 nF

CENA

5.6 nF

CENB

5.6 nF

CREF

68 nF

1N4148

RCLA

5 k

RCLB

5 k

RENA

100 k

RENB

100 k

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