L6207Q datasheet(19/27 Pages) STMICROELECTRONICS

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DocID018993 Rev 3

19/27

L6207Q

Application information

A typical application using the L6207Q device is shown in Figure 18. Typical component

values for the application are shown in Table 7. 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 L6207Q 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

and ENB inputs to ground set the shutdown time for bridge A and bridge B, respectively,

when an overcurrent is detected (see Section 5.5). The two current sensing inputs

(SENSEA and SENSEB) should be connected to the sensing resistors with a trace length as

short as possible in the layout. The sense resistors should be non-inductive resistors to

minimize the di/dt transients across the resistor. To increase noise immunity, unused logic

pins (except ENA and ENB) are best connected to 5 V (high logic level) or GND (low logic

level) (see Section 3). It is recommended to keep power ground and signal ground

separated on the PCB.

Table 7. Component values for typical application

Component

Value

100

F

100 nF

1 nF

CBOOT

220 nF

10 nF

CENA

5.6 nF

CENB

5.6 nF

CREFA

68 nF

CREFB

68 nF

1N4148

39 k



39 k



RENA

100 k



RENB

100 k



100



RSENSEA

0.3



RSENSEB

0.3



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