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8
NO.
15
16
17
18
19
20
21
22
23
24
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26
NAME
CSB
FLTB
ADDR
FBO2
FBI1
FBO1
S8
G8
D8
S9
G9
D9
DESCRIPTION
Chip select bar
CSB is the MSL2162 SPI bus chip select input for SPI transactions. Drive CSB low to enable serial
interface communication.
Fault indication output (active low)
Open drain output FLTB sinks current to ground whenever the MSL2162 detects and verifies a fault. FLTB
remains low until the fault registers are read, and reasserts if the fault persists.
Slave ID selection inputs
Connect ADDR to ground through a resistor to set the SPI bus address.
Efficiency Optimizer output 2
Connect FBO2 to the second power supply’s feedback node.
Connect FBO2 to ground if unused.
Efficiency Optimizer input 1
Connect FBI1 to FBO1 of the next device when connecting MSL2162s in series.
If unused connect FBI1 to ground.
Efficiency Optimizer output 1
Connect FBO1 to the first power supply’s feedback node. Connect FBO1 to ground if unused.
Current sense input 8
Current sense input for LED string 8.
Connect S8 to the source of the external MOSFET and to the current sense resistor for LED string 8.
The full-scale LED current threshold is 500mV is across the current sense resistor.
Gate output 8
Gate drive output for external MOSFET 8.
Connect G8 to the gate of the external MOSFET driving LED string 8.
Drain sense input 8
Drain sense input for external MOSFET 8.
Connect D8 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 8.
Current sense input 9
Current sense input for LED string 9.
Connect S9 to the source of the external MOSFET and to the current sense resistor for LED string 9.
The full-scale LED current threshold is 500mV is across the current sense resistor.
Gate output 9
Gate drive output for external MOSFET 9.
Connect G9 to the gate of the external MOSFET driving LED string 9.
Drain sense input 9
Drain sense input for external MOSFET 9.
Connect D9 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 9.
Atmel LED Driver-MSL2162
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