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L99LD01 Folha de dados(PDF) 21 Page - STMicroelectronics

Nome de Peças L99LD01
Descrição Electrónicos  High efficiency constant current LED driver for automotive applications
PDF  69 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99LD01 Folha de dados(HTML) 21 Page - STMicroelectronics

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L99LD01
Functional description
68
So in this case the LED driver goes:
•
In stand-by mode with a low level on ENABLE pin operated by the microcontroller
•
In normal mode with a high level on ENABLE pin operated by the microcontroller
The inverted FSO signal, coming from the power management device ensures, putting
trough the inverter and the external OR diode ENABLE pin high, that the LED driver
correctly restarts even if the microcontroller fails.
Figure 9. Operation with a standalone LIN and ENABLE
Figure 10. Operation with PM device and ENABLE (FSO active Low)
1.
An inverter network is required.
2.2.9
Frequency setting and dither effect
The internal main converter oscillator structure is reported in Figure 11.



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