L6226Q datasheet(13/29 Pages) STMICROELECTRONICS

Part #	L6226Q

Description	DMOS dual full bridge driver

PDF	29 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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13 / 29 page

L6226Q

Circuit description

Doc ID 14335 Rev 5

13/29

values and its magnitude is reported in Figure 12. The delay time tDELAY before turning off

the bridge when an overcurrent has been detected depends only by CEN value. Its

magnitude is reported in Figure 13.

CEN is also used for providing immunity to pin EN against fast transient noises. Therefore

the value of CEN should be chosen as big as possible according to the maximum tolerable

Delay Time and the REN value should be chosen according to the desired Disable Time.

The resistor REN should be chosen in the range from 2.2 kΩ to 180 kΩ. Recommended

values for REN and CEN are respectively 100 kΩ and 5.6 nF that allow obtaining 200 μs

disable time.

Figure 9.

Overcurrent protection simplified schematic

L6226Q Datasheet(PDF) 13 Page - STMicroelectronics