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

1 LP8860-Q1 Version Summary

Table 1-1 below compares key features and operating conditions for all orderable versions of the LP8860-Q1. Boost switching frequency, the number of channels, maximum LED current, and input brightness control method are considered critical specs and are highlighted in bold.

Table 1-1 Summary of LP8860A - LP8860H EEPROM Configurations
PARAMETER A B C D E F G H
Boost ƒSW 300 kHz 300 kHz 2.2 MHz 400 kHz 400 kHz 400 kHz 400 kHz 800 kHz
Switching Current Limit 9 A 9 A 9 A 9 A 4 A 4 A 4 A 4 A
VDD 5 V 3.3 V 5 V 5 V 5 V 5 V 5 V 5 V
LED Driver Number of Channels 4 strings 3 strings 3 strings 4 strings 1 string 2 strings 1 string 4 strings
Maximum LED Current per Channel 130 mA 70 mA 104 mA 150 mA 400 mA 90 mA 400 mA 80 mA
ISET Resistor Control Disabled Enabled Enabled Enabled Disabled Disabled Disabled Disabled
Input Brightness Control Method I2C/SPI BRT Register PWM Pin Input PWM Pin Input PWM Pin Input I2C/SPI BRT Register PWM Pin Input (Direct) I2C/SPI BRT Register PWM Pin Input
LED Output Dimming Method PWM PWM PWM PWM Hybrid Dimming PWM Hybrid Dimming PWM
Output PWM Dimming Frequency 4.883 kHz Depends on VSYNC 4.883 kHz 4.883 kHz = 11 × F_VSYNC = F_PWMIN 4.883 kHz 4.883 kHz
Dimming Ratio 1024:1 1024:1 1024:1 1024:1 15000:1 > 32000:1 > 4096:1 1024:1
Fault Handling Short LED Fault Threshold 10.6 V 10.6 V 10.6 V 10.6 V 10.6 V 10.6 V 10.6 V 6.9 V
VIN OVP Level 22.5 V 22.5 V Disabled 22.5 V 22.5 V 22.5 V Disabled 22.5 V
VIN UVLO Level 3 V 3 V 3 V 3 V 3 V 3 V 3 V 5 V
VDD UVLO 3 V 3 V 3 V 3 V 3 V 3 V 3 V 3V
Input OCP Limit 8 A 8 A 8 A 8 A 6 A 6 A 6 A 6 A
TEMP COMP Internal Temperature Compensation Disabled Enabled, 100°C Disabled Disabled Disabled Disabled Disabled Disabled
External Temperature Compensation Disabled Enabled, current Enabled, current Disabled Disabled Disabled Disabled Disabled
SYNC VSYNC Input Disabled Enabled Disabled Disabled Enabled Disabled Disabled Disabled
Table 1-2 Summary of LP8860J - LP8860L EEPROM Configurations
PARAMETER J L N R
Boost ƒSW 2.2 MHz 400 kHz 2.2 MHz 2.2 MHz
Switching Current Limit 6 A 3 A 9 A 9 A
VDD 3.3 V 3.3 V 3.3 V 3.3 V
LED Driver Number of Channels 3 strings 3 strings 2 strings 4 strings
Maximum LED Current per Channel 80 mA 80 mA 150 mA 150 mA
ISET Resistor Control Enabled Enabled Enabled Enabled
Input Brightness Control Method I2C/SPI BRT Register PWM Pin Input I2C/SPI BRT Register PWM Pin Input
LED Output Dimming Method PWM Hybrid Dimming PWM PWM
Output PWM Dimming Frequency 9.766 kHz 4.883 kHz = 11 × F_VSYNC 4.883 kHz
Dimming Ratio 1024:1 4096:1 8192:1 1024:1
Fault Handling Short LED Fault Threshold 6.9 V 10.6 V 10.6 V 10.6 V
VIN OVP Level 22.5 V Disabled 22.5 V Disabled
VIN UVLO Level 5 V 3 V 3 V 3 V
VDD UVLO 3 V 3 V 2.5 V 2.5 V
Input OCP Limit 6 A 6 A 8 A 8 A
TEMP COMP Internal Temperature Compensation Disabled Disabled Disabled Disabled
External Temperature Compensation Enabled, current Disabled Disabled Disabled
SYNC VSYNC Input Disabled Disabled Enabled Disabled

Detailed configuration information and reference schematics for each LP8860-Q1 version is listed in the rest of the document. The full bit descriptions for the EEPROM registers are found in the LP8860-Q1 data sheet.