SNVA757D August 2017 – September 2020 LP8860-Q1
The LP8860L-Q1 is configured for 3 strings × 80 mA using a 3.3-V VDD with charge pump and PWM input to control the brightness. LED current can be adjusted using an ISET resistor. Table 2-19 lists detailed configurations and full EEPROM information for LP8860L-Q1.
L | ||
---|---|---|
Boost | Switching Current imit | 3 A |
SYNC Input | Disabled | |
2 × Charge Pump | Enabled | |
Spread Spectrum | Enabled | |
ƒSW | 400 kHz | |
VDD | 3.3 V | |
Initial Boost Voltage | 28.5 V | |
LED Driver | Input Brightness Control Method | PWM pin input |
Maximum LED current per channel | 80 mA | |
ISET Resistor Control | Enabled | |
Number of Channels | 3 strings | |
Channel Phase Shift | 120 degrees (3 phases) | |
LED Output Dimming Method | Hybrid dimming | |
Current to PWM Switch Point | 0.125 | |
Current Linearity Correction Slope | 1 | |
Output PWM Dimming Frequency | 4.883 kHz | |
Dimming Resolution | 12-bit PWM + 4-bit dither | |
Drive Strength and Rise Time | 100 ns | |
Dimming Ratio | 4096:1 | |
Sloper | 105 ms | |
Driver Headroom Voltage | VSAT + 300 mV | |
Fault Handling | Short LED Fault Threshold | 10.6 V |
VIN OVP Level | Disabled | |
VIN UVLO Level | 3 V | |
VDD UVLO | 3 V | |
Input OCP Limit | 6 A | |
Powerline FET Type | PMOS | |
SD Pulldown Current | 440 µA | |
Temperature Compensation | Internal Temperature Compensation | Disabled |
External Temperature Compensation | Disabled | |
Current Dimming Knee Point | N/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 PLL | PLL | Enabled |
VSYNC input | Disabled | |
SYNC or HSYNC | N/A | |
PWM_SYNC | N/A | |
Pre-divider | N/A | |
Slow PLL Divider | N/A | |
R_SEL | N/A | |
SEL_Divider | N/A | |
PWM_FREQ | N/A | |
PWM_RES | N/A |
ADDRESS (HEX) | VALUE (BIN) | VALUE (HEX) |
---|---|---|
60 | 11110100 | F4 |
61 | 00001001 | 09 |
62 | 01000011 | 43 |
63 | 11000011 | C3 |
64 | 01011101 | 5D |
65 | 00010100 | 14 |
66 | 00111100 | 3C |
67 | 01110111 | 77 |
68 | 01110111 | 77 |
69 | 00000000 | 00 |
6A | 00001011 | 0B |
6B | 00000000 | 00 |
6C | 00000000 | 00 |
6D | 00110000 | 30 |
6E | 00010000 | 10 |
6F | 10000100 | 84 |
70 | 00000011 | 03 |
71 | 10101011 | AB |
72 | 01100000 | 60 |
73 | 00011001 | 19 |
74 | 01000101 | 45 |
75 | 00000000 | 00 |
76 | 10000010 | 82 |
77 | 00000000 | 00 |
78 | 00000000 | 00 |
Figure 2-10 shows the use case for the LP8860L-Q1