Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsPMICsPMIC - LED driver Linear TQFN 64 Surface-mount

Package Connection Description

PIN # MSL2166 MSL2164 PIN DESCRIPTION

1 G4 G4 Gate Output 4: External MOSFET Gate Drive Output for LED string 4. Connect G4 to the gate of the external MOSFET driving LED string 4. If unused, leave G4 unconnected.

2 D4 D4

Drain Sense Input 4: External MOSFET Drain Sense Input for LED string 4. Connect D4 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 4. If unused,

connect D4 to ground.

3 S5 S5

Source Sense Input 5: Source and Current Sense Input for LED string 5. Connect S5 to the source of the external MOSFET and to the current sense resistor for LED string 5. The full

scale LED current is reached when 500mV is across the current sense resistor. If unused, connect S5 to ground.

4 G5 G5 Gate Output 5: External MOSFET Gate Drive Output for LED string 5. Connect G5 to the gate of the external MOSFET driving LED string 5. If unused, leave G5 unconnected.

5 D5 D5

Drain Sense Input 5: External MOSFET Drain Sense Input for LED string 5. Connect D5 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 5. If unused,

connect D5 to ground.

6 S6 S6

Source Sense Input 6: Source and Current Sense Input for LED string 6. Connect S6 to the source of the external MOSFET and to the current sense resistor for LED string 6. The full

scale LED current is reached when 500mV is across the current sense resistor. If unused, connect S6 to ground.

7 G6 G6 Gate Output 6: External MOSFET Gate Drive Output for LED string 6. Connect G6 to the gate of the external MOSFET driving LED string 6. If unused, leave G6 unconnected.

8 D6 D6

Drain Sense Input 6: External MOSFET Drain Sense Input for LED string 6. Connect D6 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 6. If unused,

connect D6 to ground.

9 S7 S7

Source Sense Input 7: Source and Current Sense Input for LED string 7. Connect S7 to the source of the external MOSFET and to the current sense resistor for LED string 7. The full

scale LED current is reached when 500mV is across the current sense resistor. If unused, connect S7 to ground.

10 G7 G7 Gate Output 7: External MOSFET Gate Drive Output for LED string 7. Connect G7 to the gate of the external MOSFET driving LED string 7. If unused, leave G7 unconnected.

11 D7 D7

Drain Sense Input 7: External MOSFET Drain Sense Input for LED string 7. Connect D7 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 7. If unused,

connect D7 to ground.

12 MISO MISO Master Input Slave Output: MISO is the MSL2164/MSL2166 (slave) SPI serial data output and the master data input. Connect MISO to the SPI master data input

13 MOSI MOSI Master Output Slave Input: MOSI is the MSL2164/MSL2166 (slave) SPI serial data input and the master data output. Connect MOSI to the SPI master data output.

14 SCK SCK SCK is the SPI interface clock input. The SPI master generates the clock. Connect SCK to the master SPI interface clock output.

15 CSB CSB Chip Select Bar: CSB is the SPI interface chip select input. Drive CSB low to enable SPI transactions.

16 FLTB FLTB

Fault Indication Output (Open Drain, Active Low): Open drain output FLTB sinks current to GND whenever a fault is detected. FLTB remains low until the fault registers are read, and

reasserts if the fault persists.

17 ADDR ADDR Slave ID Selection Inputs: Connect ADDR to GND through a resistor to set the serial interface address.

- FBO3 Efﬁciency Optimizer Output 3: Connect FBO3 to the third power supply’s feedback node.

FBO2 - Efﬁciency Optimizer Output 2 : Connect FBO2 to the second power supply’s feedback node.

- FBO2 Efﬁciency Optimizer Output 2: Connect FBO2 to the second power supply’s feedback node.

FBIN1 - Efﬁciency Optimizer Input 1: Connect FBI1 to FBO1 of the next device when chaining devices (Figure 8-5). If unused connect FBI1 to ground.

20 FBO1 FBO1 Efﬁciency Optimizer Output 1 : Connect FBO1 to the ﬁrst power supply’s feedback node.

21 S8 S8

Source Sense Input 8 : Source and 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 is reached when 500mV is across the current sense resistor. If unused, connect S8 to ground.

22 G8 G8 Gate Output 8: External MOSFET Gate Drive Output for LED string 8. Connect G8 to the gate of the external MOSFET driving LED string 8. If unused, leave G8 unconnected.

23 D8 D8

Drain Sense Input 8: External MOSFET Drain Sense Input for LED string 8. Connect D8 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 8. If unused,

connect D8 to ground.

24 S9 S9

Source Sense Input 9: Source and 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 is reached when 500mV is across the current sense resistor. If unused, connect S9 to ground.

25 G9 G9 Gate Output 9: External MOSFET Gate Drive Output for LED string 9. Connect G9 to the gate of the external MOSFET driving LED string 9. If unused, leave G9 unconnected.

26 D9 D9

Drain Sense Input 9: External MOSFET Drain Sense Input for LED string 9. Connect D9 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 9. If unused,

connect D9 to ground.

27 S10 S10

Source Sense Input 10 : Source and Current Sense Input for LED string 10. Connect S10 to the source of the external MOSFET and to the current sense resistor for LED string 10. The

full scale LED current is reached when 500mV is across the current sense resistor. If unused, connect S10 to ground.

28 G10 G10 Gate Output 10: External MOSFET Gate Drive Output for LED string 10. Connect G10 to the gate of the external MOSFET driving LED string 10. If unused, leave G10 unconnected.

29 D10 D10

Drain Sense Input 10: External MOSFET Drain Sense Input for LED string 10. Connect D10 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 10. If

unused, connect D10 to ground.

30 S11 S11

Source Sense Input 11 : Source and Current Sense Input for LED string 11. Connect S11 to the source of the external MOSFET and to the current sense resistor for LED string 11. The

full scale LED current is reached when 500mV is across the current sense resistor. If unused, connect S119 to ground.

31 G11 G11 Gate Output 11: External MOSFET Gate Drive Output for LED string 11. Connect G11 to the gate of the external MOSFET driving LED string 11. If unused, leave G11 unconnected.

32 D11 D11

Drain Sense Input 11: External MOSFET Drain Sense Input for LED string 11. Connect D11 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 11. If

unused, connect D11 to ground.

33 S12 S12

Source Sense Input 12 : Source and Current Sense Input for LED string 12. Connect S12 to the source of the external MOSFET and to the current sense resistor for LED string 12. The

full scale LED current is reached when 500mV is across the current sense resistor. If unused, connect S12 to ground.