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

2.12 R Version

The LP8860R-Q1 is configured for four strings × 150mA using a 3.3-V VDD and PWM input to control brightness. LED current can be adjusted using an ISET resistor. Table 2-23 lists detailed configuration and full EEPROM information for the LP8860R-Q1.

Table 2-23 Detailed EEPROM Configuration: LP8860R-Q1
J
BoostSwitching Current Limit9 A
SYNC InputDisabled
2 × Charge PumpEnabled
Spread SpectrumEnabled
ƒSW2.2 MHz
VDD3.3 V
Initial Boost Voltage30 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 Frequency4.833 kHz
Dimming Resolution12-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 UVLO2.5 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 PLLPLLEnabled, 20-MHz PLL
VSYNC inputDisabled
VSYNC 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 2-24 EEPROM Register Values: LP8860R-Q1
ADDRESS (HEX) VALUE (BIN) VALUE (HEX)
60001011112F
6111111111FF
6211011100DC
6311110000F0
6411011111DF
6511110101F5
6611111000F8
670111011177
680111011177
6911100001E1
6A001111113F
6B10110111B7
6C0001011117
6D11111111FF
6E10110000B0
6F1000010084
7011001111CF
7111000111C7
7211100101E5
7311011100DC
740011010135
751000011086
76010111105E
7710111111BF
78001111103E

Figure 2-12 shows the use case for the LP8860R-Q1.

GUID-37675AB6-97BD-4987-8CDA-E6EFAB84FF8D-low.gifFigure 2-12 Use Case for LP8860R-Q1