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

2.11 N Version

The LP8860N-Q1 is configured for two strings × 150 mA using a 3.3-V VDD and I2C or SPI to control brightness. LED current can be adjusted using an ISET resistor. Table 2-21 lists detailed configuration and full EEPROM information for LP8860N-Q1.

Table 2-21 Detailed EEPROM Configuration: LP8860N-Q1
J
BoostSwitching Current Limit9 A
SYNC InputEnabled
2 × Charge PumpEnabled
Spread SpectrumEnabled
ƒSW2.2 MHz
VDD3.3 V
Initial Boost Voltage34 V
LED DriverInput Brightness Control MethodI2C/SPI BRT Register
Max LED current per channel150 mA
ISET Resistor ControlEnabled
Number of Channels2 strings
Channel Phase Shift180 degrees (2 phases)
LED Output Dimming MethodPWM
Current to PWM Switch PointN/A
Current Linearity Correction SlopeN/A
Output PWM Dimming Frequency= 11 × F_VSYNC
Dimming Resolution10-bit PWM + 4-bit dither
Drive Strength and Rise Time100 ns
Dimming Ratio8192:1
Sloper105 ms + advanced slope
Driver Headroom VoltageVSAT + 50 mV
Fault HandlingShort LED Fault Threshold10.6 V
VIN OVP Level22.5 V
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 = 8192 × 11 × F_VSYNC
VSYNC inputEnabled
VSYNC or HSYNCVSYNC
PWM_SYNC1
Pre-divider0
Slow PLL Divider10
R_SEL0
SEL_DividerSlow
PWM_FREQ0
PWM_RES3
Table 2-22 EEPROM Register Values: LP8860N-Q1
ADDRESS (HEX) VALUE (BIN) VALUE (HEX)
6011111111FF
6111111111FF
6211011100DC
6311110100F4
64010111115F
6511111011FB
6611111010FA
670111011177
680111011177
690111000070
6A001111113F
6B0000000000
6C11001010CA
6D11010000D0
6E10110000B0
6F1000011187
7011001111CF
7110100111A7
7211100101E5
7311100100E4
740011010135
7510101110AE
760101001052
7711111111FF
78001111103E

Figure 2-11 shows the use case for the LP8860N-Q1.

GUID-ADD7F108-740F-429F-B3DB-C6CF932C7F92-low.gifFigure 2-11 Use Case for LP8860N-Q1