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

2.4 D Version

The LP8860D-Q1 is configured for four strings × 150 mA using a 5-V VDD and PWM pin to control brightness. LED current can be adjusted using an ISET resistor. Table 2-7 lists detailed configurations and full EEPROM information for LP8860D-Q1.

Table 2-7 Detailed EEPROM Configuration for LP8860D-Q1
D
BoostSwitching Current Limit9 A
SYNC InputDisabled
2 × Charge PumpDisabled
Spread SpectrumDisabled
ƒSW400 kHz
VDD5 V
Initial Boost Voltage25 V
LED DriverInput Brightness Control MethodPWM pin input
Max LED current per channel150 mA
ISET Resistor ControlEnabled
Number of Channels4 strings
Channel Phase Shift90 degrees (4 phases)
LED Output Dimming MethodPWM
Current to PWM Switch PointN/A
Current Linearity Correction SlopeN/A
Output PWM Dimming Frequency4.883 kHz
Dimming Resolution10-bit PWM + 4-bit dither
Drive Strength and Rise Time200 ns
Dimming Ratio1024:1
Sloper105 ms + advanced slope
Driver Headroom VoltageVSAT + 50 mV
Fault HandlingShort LED Fault Threshold10.6 V
VIN OVP Level22.5
VIN UVLO Level3 V
VDD UVLO3 V
Input OCP Limit8 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 PLLPLLDisabled, 5-MHz oscillator
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 2-8 EEPROM Register Values for LP8860D-Q1
ADDRESS (HEX) VALUE (BIN) VALUE (HEX)
6011101111EF
6111111111FF
6211011100DC
6311110000F0
6411011111DF
6511100101E5
6611111000F8
670111011177
680111011177
690111000171
6A001111113F
6B10110111B7
6C0001011117
6D11101111EF
6E10110000B0
6F1000011187
7011001110CE
710111001173
7211100101E5
7311010010D2
740011010135
750000011006
7611011100DC
7711111111FF
78001111103E

Figure 2-4 shows the use case for the LP8860D-Q1.

GUID-BC09FD50-66E8-4D76-9ED0-83BD651C4FF2-low.gifFigure 2-4 Use Case for LP8860D-Q1