LP8551TLX/NOPB
ActiveFOUR CHANNEL HIGH-EFFICIENCY LED BACKLIGHT DRIVER FOR NOTEBOOKS WITH VDDIO PWM LOGIC LEVEL
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LP8551TLX/NOPB
ActiveFOUR CHANNEL HIGH-EFFICIENCY LED BACKLIGHT DRIVER FOR NOTEBOOKS WITH VDDIO PWM LOGIC LEVEL
Technical Specifications
Parameters and characteristics for this part
| Specification | LP8551TLX/NOPB |
|---|---|
| Applications | Backlight |
| Current - Output / Channel | 50 mA |
| Dimming | PWM |
| Internal Switch(s) | True |
| Mounting Type | Surface Mount |
| Number of Outputs | 4 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -30 °C |
| Package / Case | DSBGA, 25-WFBGA |
| Supplier Device Package | 25-DSBGA |
| Topology | Step-Up (Boost) |
| Type | DC DC Regulator |
| Voltage - Output | 40 V |
| Voltage - Supply (Max) [Max] | 22 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 3000 | $ 1.01 | |
| 6000 | $ 0.97 | |||
| Texas Instruments | LARGE T&R | 1 | $ 1.66 | |
| 100 | $ 1.37 | |||
| 250 | $ 0.98 | |||
| 1000 | $ 0.74 | |||
Description
General part information
LP8551 Series
The LP8551 is a white LED driver with integrated boost converter. It has four adjustable current sinks which can be controlled by PWM input or with I2C-compatible serial interface.
The boost converter has adaptive output voltage control based on the LED driver voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions.
LED outputs have 8-bit current resolution and up to 13-bit PWM resolution to achieve smooth and precise brightness control. Proprietary Phase Shift PWM control is used for LED outputs to reduce peak current from the boost converter, thus making the boost capacitors smaller. The Phase Shifting scheme also eliminates audible noise.
