LP8860-Q1 - 4-Channel Automotive LED Driver | Texas Instruments
MPN: LP8860-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.1 | $2,100.00 |
Drop-in alternatives for LP8860-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LP8865C-Q1
β Drop-Inπ Reference alternative (not in catalog)
TPS61196-Q1
β Drop-Inπ Reference alternative (not in catalog)
MP3394
β Drop-Inπ Reference alternative (not in catalog)
LT3518EUF#PBF
β Drop-Inπ Reference alternative (not in catalog)
TPS92691
β Drop-Inβ In Stock
$1.38 / Unit
View Datasheet βLP8860-Q1 Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 |
| Output Current per Channel | 150 mA |
| Input Voltage Range | 3 V to 48 V |
| Switching Frequency | 100 kHz to 2.2 MHz |
| Dimming Method | Hybrid PWM and Current Dimming |
| Control Interface | PWM, I2C, SPI |
| Package | 32-HLQFP (7x7 mm) |
| Operating Temperature | -40Β°C to +125Β°C |
| AEC-Q100 Qualified | Yes |
| Spread Spectrum | Yes |
| Phase-Shift PWM | Yes |
| Adaptive Output Voltage | Yes |
| LED Fault Protection | Open/Short Detection |
| Overvoltage Protection | Yes |
| Overtemperature Protection | Yes |
LP8860-Q1 Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | GND β Ground |
| Pin 3 | SW β Switch node for boost converter |
| Pin 4 | BST β Bootstrap for high-side FET |
| Pin 5 | ISET β LED current set resistor |
| Pin 6 | TSENSE β Temperature sense input |
| Pin 7 | PWM β PWM dimming input |
| Pin 8 | SCL β I2C clock |
| Pin 9 | SDA β I2C data |
| Pin 10 | SPI_CLK β SPI clock |
| Pin 11 | SPI_DIN β SPI data in |
| Pin 12 | SPI_DOUT β SPI data out |
| Pin 13 | SPI_CS β SPI chip select |
| Pin 14 | LED1 β LED channel 1 sink |
| Pin 15 | LED2 β LED channel 2 sink |
| Pin 16 | LED3 β LED channel 3 sink |
| Pin 17 | LED4 β LED channel 4 sink |
| Pin 18 | FB β Feedback for boost output |
| Pin 19 | COMP β Compensation for boost loop |
| Pin 20 | EN β Enable input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LP8860-Q1 is suitable for 6 applications: Automotive Infotainment Display Backlight, Instrument Cluster Backlight, Heads-Up Display (HUD) Backlight, Automotive Lighting Systems, Industrial Display Backlight, Portable Device Backlight.
Automotive Infotainment Display Backlight
The LP8860-Q1 is ideal for backlighting LCD displays in automotive infotainment systems. Its four 150 mA channels can drive multiple LED strings, and the hybrid PWM/current dimming reduces EMI, which is critical in vehicles. The wide input voltage range (3-48V) accommodates battery voltage variations, and the AEC-Q100 qualification ensures reliability in harsh automotive environments. The boost controller steps up the input to the required LED string voltage, while adaptive output voltage control minimizes power dissipation, improving overall system efficiency.
Recommended
Instrument Cluster Backlight
In instrument clusters, the LP8860-Q1 provides precise current control for LED backlighting, ensuring consistent brightness across the display. The phase-shift PWM feature reduces audible noise, which is important in quiet vehicle cabins. The device's spread-spectrum capability helps avoid interference with AM radio, a key requirement in automotive electronics. With four channels, it can independently control different zones of the cluster, enabling dynamic lighting effects. The I2C/SPI interface allows for easy brightness adjustment and fault monitoring.
Recommended
Heads-Up Display (HUD) Backlight
The LP8860-Q1 is suitable for HUD backlighting, where high brightness and low EMI are essential. Its four channels can drive multiple LED strings to achieve the required luminance, while the hybrid PWM/current dimming provides smooth dimming without flicker. The wide input voltage range supports various automotive power rails, and the boost controller ensures sufficient voltage for LED strings. The device's small 32-HLQFP package saves PCB space, and its AEC-Q100 qualification guarantees performance in extreme temperatures.
Recommended
Automotive Lighting Systems
Beyond displays, the LP8860-Q1 can be used in automotive lighting systems such as ambient lighting and interior lighting. Its four channels allow independent control of different lighting zones, and the PWM dimming enables dynamic lighting effects. The device's low-EMI design is crucial for automotive EMC compliance, and its wide input voltage range accommodates load dump and cold crank conditions. The boost controller can drive LED strings with high forward voltage, making it versatile for various lighting applications.
Recommended
Industrial Display Backlight
The LP8860-Q1 can also be used in industrial displays, where reliability and wide input voltage range are important. Its four channels can drive LED strings in harsh environments, and the hybrid PWM/current dimming provides efficient brightness control. The device's spread-spectrum feature reduces EMI, which is beneficial in industrial settings with sensitive equipment. The wide operating temperature range (-40Β°C to +125Β°C) ensures operation in extreme conditions, and the I2C/SPI interface allows for remote monitoring and control.
Recommended
Portable Device Backlight
Although designed for automotive, the LP8860-Q1 can be used in portable devices that require high-brightness LED backlighting. Its wide input voltage range (3-48V) allows operation from various battery configurations, and the boost controller can drive LED strings with high voltage. The device's small package and low-EMI design make it suitable for space-constrained applications. However, the AEC-Q100 qualification is not required for consumer devices, so designers may consider non-automotive alternatives for cost savings.
Recommended
Recommended Products Summary
Engineering reference data for LP8860-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LP8865C-Q1 | TPS61196-Q1 | MP3394 | LT3518EUF#PBF |
|---|---|---|---|---|---|
| Package | 32-HLQFP (7x7) | 32-HLQFP (7x7) | 32-HLQFP (7x7) | 32-HLQFP (7x7) | 32-HLQFP (7x7) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Monolithic Power Systems | Analog Devices |
| Number of Channels | 4 | 4 | 6 | 4 | 1 |
| Output Current per Channel | 150 mA | 150 mA | 100 mA | 200 mA | 1 A |
| Input Voltage Range | 3 V to 48 V | 3 V to 48 V | 4.5 V to 40 V | 4.5 V to 40 V | 3 V to 30 V |
| Switching Frequency | 100 kHz to 2.2 MHz | 100 kHz to 2.2 MHz | 100 kHz to 2.2 MHz | 200 kHz to 1 MHz | 250 kHz to 2.5 MHz |
| Dimming Method | Hybrid PWM and Current | Hybrid PWM and Current | PWM | PWM | PWM |
| AEC-Q100 Qualified | Yes | Yes | Yes | No | No |
Key Differentiators
- Hybrid PWM and current dimming (vs TPS61196-Q1)
- Four channels with 150 mA each (vs MP3394)
- AEC-Q100 qualified (vs LT3518EUF#PBF)
Design Notes
For optimal performance, place the boost inductor and input/output capacitors close to the LP8860-Q1. Use a solid ground plane and minimize the loop area of the switch node (SW) to reduce EMI. The datasheet recommends a 4-layer PCB with dedicated power and ground planes for automotive applications.
The LP8860-Q1 can dissipate significant power when driving high LED currents. Ensure adequate copper area on the PCB for heat sinking, especially under the exposed pad. The thermal resistance from junction to ambient (ΞΈJA) depends on PCB layout; a typical value is 30Β°C/W with proper thermal vias. Monitor the TSENSE pin to implement thermal derating if needed.
When setting the LED current with the ISET resistor, use a 1% tolerance resistor to maintain accuracy. The TSENSE pin should be connected to a thermistor or left floating if not used. Ensure the boost output voltage is set correctly to provide sufficient headroom for the LED strings, but not too high to avoid excessive power dissipation. Also, verify that the switching frequency does not interfere with AM radio bands; use spread-spectrum if necessary.
Compliance Information
AEC-Q100 qualified per TI product page. RoHS and REACH compliant per TI datasheet.
