L99MH98 datasheet(26/147 Pages) STMICROELECTRONICS

Part #	L99MH98

Description	Automotive octal half-bridge pre-driver

PDF	147 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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26 / 147 page

Figure 10. VDH and VDD high, EN pin goes high and low

VDH

VDD

VENH

3.3 V or 5 V

VENL

The second case of a possible power-on sequence is shown in the Figure 11. In this case the VDD is raised while

the VDH and EN pins are kept low. After the VDD pin is high and stable, the EN pin is raised to turn on the logic of

the L99MH98 or lowered to turn it off. L99MH98 turns on when the EN pin exceeds the rising VENH threshold and

will turn off when it drops below the falling VENL threshold.

Figure 11. VDH and VDD high, EN pin goes high and low

VDH

VDD

VENH

3.3 V or 5 V

VENL

Another case of a possible power-on sequence of L99MH98 is shown in the Figure 12. In this case VDD, VDH and

EN pins are raised at the same time with the same slew rate.

Figure 12. VDH, VDD and EN pin goes high and low with the same slew rate

VDH

VDD

3.3 V or 5 V

VBAT (13 V typ)

L99MH98

Functional description

DS14611 - Rev 3

page 26/147

L99MH98 Datasheet(PDF) 26 Page - STMicroelectronics