LP8545SQX/NOPB
ActiveTexas Instruments
SIX CHANNEL HIGH-EFFICIENCY LED BACKLIGHT DRIVER FOR NOTEBOOKS WITH FLEXIBLE EXT/INT FET CONTROL
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LP8545SQX/NOPB
ActiveTexas Instruments
SIX CHANNEL HIGH-EFFICIENCY LED BACKLIGHT DRIVER FOR NOTEBOOKS WITH FLEXIBLE EXT/INT FET CONTROL
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Technical Specifications
Parameters and characteristics commom to parts in this series
| Specification | LP8545SQX/NOPB | LP8545 Series |
|---|---|---|
| Applications | Backlight | Backlight |
| Current - Output / Channel | 50 mA | 50 mA |
| Dimming | PWM | PWM |
| Frequency | 1.25 MHz, 156 kHz, 625 kHz, 312 kHz | 1.25 - 625 MHz |
| Internal Switch(s) | True | True |
| Mounting Type | Surface Mount | Surface Mount |
| Number of Outputs | 6 | 6 |
| Operating Temperature [Max] | 85 C | 85 C |
| Operating Temperature [Min] | -30 °C | -30 °C |
| Package / Case | 24-WFQFN Exposed Pad | 24-WFQFN Exposed Pad |
| Supplier Device Package | 24-WQFN (4x4) | 24-WQFN (4x4) |
| Topology | Step-Up (Boost) | Step-Up (Boost) |
| Type | DC DC Regulator | DC DC Regulator |
| Voltage - Output | 40 V | 40 V |
| Voltage - Supply (Max) [Max] | 22 V | 22 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
LP8545 Series
Six channel high-efficiency LED backlight driver for notebooks with flexible ext/int FET control
| Part | Dimming | Voltage - Supply (Max) [Max] | Supplier Device Package | Package / Case | Type | Frequency | Current - Output / Channel | Voltage - Output | Internal Switch(s) | Mounting Type | Operating Temperature [Min] | Operating Temperature [Max] | Applications | Topology | Number of Outputs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments LP8545SQX/NOPBThe LP8545 is a white LED driver with integrated boost converter. It has six 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 with additional 1-3 bit dithering 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.
Internal EEPROM is used for storing the configuration data. This makes it possible to have minimum external component count and make the solution very small.
LP8545 has safety features which make it possible to detect LED outputs with open or short fault. As well low input voltage and boost over-current conditions are monitored and chip is turned off in case of these events. Thermal de-rating function prevents overheating of the device by reducing backlight brightness when set temperature has been reached.
LP8545 is available in TI’s WQFN 24-pin package.
The LP8545 is a white LED driver with integrated boost converter. It has six 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 with additional 1-3 bit dithering 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.
Internal EEPROM is used for storing the configuration data. This makes it possible to have minimum external component count and make the solution very small.
LP8545 has safety features which make it possible to detect LED outputs with open or short fault. As well low input voltage and boost over-current conditions are monitored and chip is turned off in case of these events. Thermal de-rating function prevents overheating of the device by reducing backlight brightness when set temperature has been reached.
LP8545 is available in TI’s WQFN 24-pin package. | PWM | 22 V | 24-WQFN (4x4) | 24-WFQFN Exposed Pad | DC DC Regulator | 1.25 MHz, 156 kHz, 312 kHz, 625 kHz | 50 mA | 40 V | Surface Mount | -30 °C | 85 C | Backlight | Step-Up (Boost) | 6 | |
Texas Instruments LP8545SQE/NOPBThe LP8545 is a white LED driver with integrated boost converter. It has six 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 with additional 1-3 bit dithering 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.
Internal EEPROM is used for storing the configuration data. This makes it possible to have minimum external component count and make the solution very small.
LP8545 has safety features which make it possible to detect LED outputs with open or short fault. As well low input voltage and boost over-current conditions are monitored and chip is turned off in case of these events. Thermal de-rating function prevents overheating of the device by reducing backlight brightness when set temperature has been reached.
LP8545 is available in TI’s WQFN 24-pin package.
The LP8545 is a white LED driver with integrated boost converter. It has six 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 with additional 1-3 bit dithering 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.
Internal EEPROM is used for storing the configuration data. This makes it possible to have minimum external component count and make the solution very small.
LP8545 has safety features which make it possible to detect LED outputs with open or short fault. As well low input voltage and boost over-current conditions are monitored and chip is turned off in case of these events. Thermal de-rating function prevents overheating of the device by reducing backlight brightness when set temperature has been reached.
LP8545 is available in TI’s WQFN 24-pin package. | PWM | 22 V | 24-WQFN (4x4) | 24-WFQFN Exposed Pad | DC DC Regulator | 1.25 MHz, 156 kHz, 312 kHz, 625 kHz | 50 mA | 40 V | Surface Mount | -30 °C | 85 C | Backlight | Step-Up (Boost) | 6 |
Description
General part information
LP8545 Series
The LP8545 is a white LED driver with integrated boost converter. It has six 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 with additional 1-3 bit dithering 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.