SNVA757D August   2017  – September 2020 LP8860-Q1

 

  1. 1LP8860-Q1 Version Summary
  2. 2Specific EEPROM Versions
    1. 2.1  A Version
    2. 2.2  B Version
    3. 2.3  C Version
    4. 2.4  D Version
    5. 2.5  E Version
    6. 2.6  F Version
    7. 2.7  G Version
    8. 2.8  H Version
    9. 2.9  J Version
    10. 2.10 L Version
    11. 2.11 N Version
    12. 2.12 R Version
  3. 3Revision History

2.10 L Version

The LP8860L-Q1 is configured for 3 strings × 80 mA using a 3.3-V VDD with charge pump and PWM input to control the brightness. LED current can be adjusted using an ISET resistor. Table 2-19 lists detailed configurations and full EEPROM information for LP8860L-Q1.

Table 2-19 Detailed EEPROM Configuration: LP8860L-Q1
L
BoostSwitching Current imit3 A
SYNC InputDisabled
2 × Charge PumpEnabled
Spread SpectrumEnabled
ƒSW400 kHz
VDD3.3 V
Initial Boost Voltage28.5 V
LED DriverInput Brightness Control MethodPWM pin input
Maximum LED current per channel80 mA
ISET Resistor ControlEnabled
Number of Channels3 strings
Channel Phase Shift120 degrees (3 phases)
LED Output Dimming MethodHybrid dimming
Current to PWM Switch Point0.125
Current Linearity Correction Slope1
Output PWM Dimming Frequency4.883 kHz
Dimming Resolution12-bit PWM + 4-bit dither
Drive Strength and Rise Time100 ns
Dimming Ratio4096:1
Sloper105 ms
Driver Headroom VoltageVSAT + 300 mV
Fault HandlingShort LED Fault Threshold10.6 V
VIN OVP LevelDisabled
VIN UVLO Level3 V
VDD UVLO3 V
Input OCP Limit6 A
Powerline FET TypePMOS
SD Pulldown Current440 µA
Temperature CompensationInternal Temperature CompensationDisabled
External Temperature CompensationDisabled
Current Dimming Knee PointN/A
EXT_TEMP_GAIN[3:0]N/A
EXT_TEMP_LEVEL_HIGH[3:0]N/A
EXT_TEMP_LEVEL_LOW[3:0]N/A
VSYNC and PLLPLLEnabled
VSYNC inputDisabled
SYNC or HSYNCN/A
PWM_SYNCN/A
Pre-dividerN/A
Slow PLL DividerN/A
R_SELN/A
SEL_DividerN/A
PWM_FREQN/A
PWM_RESN/A
Table 2-20 EEPROM Register Values: LP8860L-Q1
ADDRESS (HEX) VALUE (BIN) VALUE (HEX)
6011110100F4
610000100109
620100001143
6311000011C3
64010111015D
650001010014
66001111003C
670111011177
680111011177
690000000000
6A000010110B
6B0000000000
6C0000000000
6D0011000030
6E0001000010
6F1000010084
700000001103
7110101011AB
720110000060
730001100119
740100010145
750000000000
761000001082
770000000000
780000000000

Figure 2-10 shows the use case for the LP8860L-Q1

GUID-F2674E19-EC31-41F3-8DCF-90E4E09B7AF6-low.gifFigure 2-10 Use Case for LP8860L-Q1