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

2.3 C Version

The LP8860C-Q1 is configured for three strings × 104 mA using a 5-V VDD and PWM pin to control brightness. LED current can be adjusted using an ISET resistor. Table 2-5 lists detailed configurations and full EEPROM information for the LP8860C-Q1.

Table 2-5 Detailed EEPROM Configuration for LP8860C-Q1
C
BoostSwitching Current Limit9 A
SYNC InputDisabled
2 × Charge PumpDisabled
Spread SpectrumDisabled
ƒSW2.2 MHz
VDD3.3 V
Initial Boost Voltage46 V
LED DriverInput Brightness Control MethodPWM pin input
Maximum LED Current per Channel125 mA
ISET Resistor ControlEnabled
Number of Channels3 strings
Channel Phase Shift120 degrees (3 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 LevelDisabled
VIN UVLO Level3 V
VDD UVLO3 V
Input OCP Limit8 A
Powerline FET TypePMOS
SD Pulldown Current440 µA
Temperature CompensationInternal Temperature CompensationDisabled
External Temperature CompensationEnabled, current dimming mode
Current Dimming Knee Point5 µA
EXT_TEMP_GAIN[3:0]5
EXT_TEMP_LEVEL_HIGH[3:0]22.67 kΩ
EXT_TEMP_LEVEL_LOW[3:0]22.67 kΩ
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 2-6 EEPROM Register Values for LP8860C-Q1
ADDRESS (HEX) VALUE (BIN) VALUE (HEX)
60011011016D
61010111005C
6211011100DC
6311110010F2
64010111115F
6511100101E5
6611111000F8
670111011177
680111011177
6910110001B1
6A10111111BF
6B11111111FF
6C0001011117
6D11101111EF
6E10110000B0
6F0000010004
7011001110CE
710000011107
7211100101E5
7311111100FC
740011010135
7510101110AE
7611011100DC
770011001133
78001111113F

Figure 2-3 shows the use case for the LP8860C-Q1.

GUID-D07567FB-873E-400F-BA21-19222D354337-low.gifFigure 2-3 Use Case for LP8860C-Q1