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

2.6 F Version

The LP8860F-Q1 is configured for two strings × 90 mA using a 5-V VDD and PWM pin to control brightness. LP8860F-Q1 is configured into direct-PWM mode, which bypasses mode brightness path features similar to the LP8861-Q1. Table 2-11 lists detailed configurations and full EEPROM information for the LP8860F-Q1.

Table 2-11 Detailed EEPROM Configuration: LP8860F-Q1
F
BoostSwitching Current Limit4 A
SYNC InputDisabled
2 × Charge PumpDisabled
Spread SpectrumEnabled
ƒSW400 kHz
VDD5 V
Initial Boost Voltage26 V
LED DriverInput Brightness Control MethodPWM pin input (direct)
Maximum LED Current per Channel90 mA
ISET Resistor ControlDisabled
Number of Channels2 strings
Channel Phase ShiftNo phase shift
LED Output Dimming MethodPWM
Current to PWM Switch PointN/A
Current Linearity Correction SlopeN/A
Output PWM Dimming Frequency= F_PWMIN
Dimming ResolutionN/A
Drive Strength and Rise Time100 ns
Dimming Ratio> 32000:1
SloperN/A
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 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 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 2-12 EEPROM Register Values for LP8860F-Q1
ADDRESS (HEX) VALUE (BIN) VALUE (HEX)
6011111110FE
610110011066
6211010100D4
6311010100D4
6411011111DF
650000010105
660111001173
670111011177
680111011177
690111000171
6A001110113B
6B0000000000
6C000010100A
6D0010000020
6E10110100B4
6F1000010084
7011000100C4
7111110011F3
7211100101E5
7311010100D4
740011010135
750000000000
7611011100DC
7711111111FF
78001111103E

Figure 2-6 shows the use case for the LP8860F-Q1.

GUID-02033E2A-F3AC-460B-B262-FD033CB57439-low.gifFigure 2-6 Use Case for LP8860F-Q1