LP8555YFQR
ActiveHIGH-EFFICIENCY LED BACKLIGHT DRIVER FOR TABLET PCS
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LP8555YFQR
ActiveHIGH-EFFICIENCY LED BACKLIGHT DRIVER FOR TABLET PCS
Technical Specifications
Parameters and characteristics for this part
| Specification | LP8555YFQR |
|---|---|
| Applications | Backlight |
| Current - Output / Channel [custom] | 180 mA |
| Dimming | PWM |
| Frequency | 1 MHz, 500 kHz |
| Internal Switch(s) | True |
| Mounting Type | Surface Mount |
| Number of Outputs | 12 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 36-WFBGA, DSBGA |
| Supplier Device Package | 36-DSBGA |
| Topology | Step-Up (Boost) |
| Type | DC DC Regulator |
| Voltage - Output [Max] | 28 V |
| Voltage - Output [Min] | 7 V |
| Voltage - Supply (Max) [Max] | 20 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 3.09 | |
| Digi-Reel® | 1 | $ 3.09 | ||
| Tape & Reel (TR) | 3000 | $ 1.55 | ||
| 6000 | $ 1.49 | |||
| Texas Instruments | LARGE T&R | 1 | $ 2.33 | |
| 100 | $ 2.04 | |||
| 250 | $ 1.43 | |||
| 1000 | $ 1.16 | |||
Description
General part information
LP8555 Series
The LP8555 is a high efficiency LED driver with integrated dual DC-DC boost converters. It has 12 high-precision current sinks that can be controlled by a PWM input signal, an I2C master, or both.
Dual-boost configuration of LP8555 shares the load to two inductors and allows thinner overall solution size and better efficiency compared to single-boost solutions. 12 LED strings allows driving high number of LEDs with optimal efficiency since boost conversion ratio can be kept low.
The boost converter has adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions.
Documents
Technical documentation and resources