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L99LD01 Fiches technique(PDF) 27 Page - STMicroelectronics

No de pièce L99LD01
Description  High efficiency constant current LED driver for automotive applications
PDF  69 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99LD01 Fiches technique(HTML) 27 Page - STMicroelectronics

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L99LD01
Functional description
68
Figure 17. LED overvoltage detection due to a possible battery VS overvoltage
Figure 18. Behavior of LED overvoltage recovery bit with low on-time of PWM_L
2.2.11
Programming the over/under voltage threshold
The voltage across the LED string is continuously sensed by the external resistor divider
R5/R6 and reported inside the chip trough the apposite pin VLED. Considering negligible the
voltage drop due to the sense resistor and the VDS of external mosfet M2 respect to the LED



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