LP8556SQ-E00/NOPB
Active6 CHANNEL HIGH-EFFICIENCY/EFFICACY LED BACKLIGHT DRIVER
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LP8556SQ-E00/NOPB
Active6 CHANNEL HIGH-EFFICIENCY/EFFICACY LED BACKLIGHT DRIVER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LP8556SQ-E00/NOPB |
|---|---|
| Applications | Backlight |
| Current - Output / Channel | 50 mA |
| Dimming | PWM |
| Frequency | 1.25 MHz, 312 kHz, 625 kHz |
| Internal Switch(s) | True |
| Mounting Type | Surface Mount |
| Number of Outputs | 5 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -30 °C |
| Package / Case | 24-WFQFN Exposed Pad |
| Supplier Device Package | 24-WQFN (4x4) |
| Topology | Step-Up (Boost) |
| Type | DC DC Regulator |
| Voltage - Output [Max] | 43 V |
| Voltage - Output [Min] | 7 V |
| Voltage - Supply (Max) [Max] | 20 V |
LP8556 Series
6 channel high-efficiency/Efficacy LED backlight driver
| Part | Type | Dimming | Voltage - Output [Min] | Voltage - Output [Max] | Internal Switch(s) | Voltage - Supply (Max) [Max] | Topology | Supplier Device Package | Supplier Device Package [y] | Supplier Device Package [x] | Number of Outputs | Operating Temperature [Min] | Operating Temperature [Max] | Package / Case | Current - Output / Channel | Mounting Type | Frequency | Applications |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Texas Instruments | DC DC Regulator | I2C PWM | 7 V | 43 V | 20 V | Step-Up (Boost) | 20-DSBGA | 1.78 | 2.04 | 6 | -30 °C | 85 °C | 20-WFBGA DSBGA | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight | |
 Texas Instruments | DC DC Regulator | PWM | 7 V | 43 V | 20 V | Step-Up (Boost) | 20-DSBGA | 1.78 | 2.04 | 5 | -30 °C | 85 °C | 20-WFBGA DSBGA | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight | |
Texas Instruments | DC DC Regulator | PWM | 7 V | 43 V | 20 V | Step-Up (Boost) | 24-WQFN (4x4) | 6 | -30 °C | 85 °C | 24-WFQFN Exposed Pad | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight | |||
Texas Instruments | DC DC Regulator | PWM | 7 V | 43 V | 20 V | Step-Up (Boost) | 20-DSBGA | 1.78 | 2.04 | 6 | -30 °C | 85 °C | 20-WFBGA DSBGA | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight | |
Texas Instruments | DC DC Regulator | PWM | 7 V | 43 V | 20 V | Step-Up (Boost) | 24-WQFN (4x4) | 6 | -30 °C | 85 °C | 24-WFQFN Exposed Pad | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight | |||
Texas Instruments | DC DC Regulator | PWM | 7 V | 43 V | 20 V | Step-Up (Boost) | 24-WQFN (4x4) | 6 | -30 °C | 85 °C | 24-WFQFN Exposed Pad | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight | |||
Texas Instruments | DC DC Regulator | 7 V | 43 V | 20 V | Step-Up (Boost) | 20-DSBGA | 1.78 | 2.04 | 6 | -30 °C | 85 °C | 20-WFBGA DSBGA | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight | ||
Texas Instruments | DC DC Regulator | PWM | 7 V | 43 V | 20 V | Step-Up (Boost) | 20-DSBGA | 1.78 | 2.04 | 5 | -30 °C | 85 °C | 20-WFBGA DSBGA | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight | |
Texas Instruments | DC DC Regulator | PWM | 7 V | 43 V | 20 V | Step-Up (Boost) | 24-WQFN (4x4) | 5 | -30 °C | 85 °C | 24-WFQFN Exposed Pad | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight | |||
 Texas Instruments | DC DC Regulator | PWM | 7 V | 43 V | 20 V | Step-Up (Boost) | 24-WQFN (4x4) | 4 | -30 °C | 85 °C | 24-WFQFN Exposed Pad | 50 mA | Surface Mount | 1.25 MHz 312 kHz 625 kHz | Backlight |
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 | $ 2.82 | |
| 10 | $ 2.53 | |||
| 25 | $ 2.40 | |||
| 100 | $ 2.08 | |||
| 250 | $ 1.97 | |||
| 500 | $ 1.77 | |||
| Digi-Reel® | 1 | $ 2.82 | ||
| 10 | $ 2.53 | |||
| 25 | $ 2.40 | |||
| 100 | $ 2.08 | |||
| 250 | $ 1.97 | |||
| 500 | $ 1.77 | |||
| Tape & Reel (TR) | 1000 | $ 1.49 | ||
| 2000 | $ 1.42 | |||
| 5000 | $ 1.36 | |||
| Texas Instruments | SMALL T&R | 1 | $ 2.60 | |
| 100 | $ 2.00 | |||
| 250 | $ 1.48 | |||
| 1000 | $ 1.05 | |||
Description
General part information
LP8556 Series
The LP8556 device is a white-LED driver featuring an asynchronous boost converter and six high precision current sinks that can be controlled by a PWM signal or an I2C master.
The boost converter uses adaptive output voltage control for setting the optimal LED driver voltages as low as 7 V and as high as 43 V. This feature minimizes the power consumption by adjusting the output voltage to the lowest sufficient level under all conditions. The converter can operate at three switching frequencies: 312 kHz, 625 kHz, and 1250 kHz, which can be set with an external resistor or pre-configured via EPROM. Programmable slew rate control and spread spectrum scheme minimize switching noise and improve EMI performance.
LED current sinks can be set with the PWM dimming resolution of up to 15 bits. Proprietary adaptive dimming mode allows higher system power saving. In addition, phase shifted LED PWM dimming allows reduced audible noise and smaller boost output capacitors.
Documents
Technical documentation and resources