L6208Q datasheet(24/34 Pages) STMICROELECTRONICS

24 / 34 page

Application information

L6208Q

24/34

DocID018710 Rev 3

Application information

A typical application using the L6208Q device is shown in Figure 25. Typical component

values for the application are shown in Table 6. 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 L6208Q to improve the high frequency filtering on the power supply and reduce high

frequency transients generated by the switching. The capacitors connected from the EN

input to ground set the shutdown time when an overcurrent is detected (see Section 5.9 on

page 20). 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 EN) are best connected to 5

V (high logic level) or GND (low logic level) (see Section 3 on page 6). It is recommended to

keep power ground and signal ground separate on the PCB.

Table 6. Component values for typical application

Component

Value

100

F

100 nF

1 nF

CBOOT

220 nF

10 nF

CENB

5.6 nF

CREF

68 nF

1N4148

39 k



39 k



REN

100 k



100



RSENSEA

0.3



RSENSEB

0.3



L6208Q Datasheet(PDF) 24 Page - STMicroelectronics

L6208Q Datasheet(HTML) 24 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

Datasheet Download

Link URL