L99LDLH32 datasheet(37/142 Pages) STMICROELECTRONICS

Part #	L99LDLH32

Description	32-channel LED driver with automotive CAN FD Light interface

PDF	142 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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37 / 142 page

DS12879 Rev 6

37/142

L99LDLH32

Functional description

141

Figure 11. Short to ground fault management

5.3.9

Channel output – Open load detection

The L99LDLH32 features the open load (no current regulation) detection, implemented both

in Bus mode and Fail Safe / Stand Alone mode as well.

The open load detection is masked when the O/LED supply voltage is below a power good

threshold (VPG_TH_VPRE_REG), which is configurable in the range of [VPG_TH_VPRE_REG_min

÷ VPG_TH_VPRE_REG_max] with a step equal to VPG_TH_VPRE_REG_step.

There is one status bit (PG_NOT_VPRE_REG - see RAM memory map, Chapter 7) for the

VPRE_REG group to indicate the selected voltage threshold to enable open load diagnostic is

reached. If this bit is equal to “0”, the desired voltage threshold is not reached and the open

load diagnostic is disabled; otherwise, the threshold is reached and the diagnostic enabled.

L99LDLH32 Datasheet(PDF) 37 Page - STMicroelectronics