MAX25530

Automotive I²C-Controlled 4-Channel 150mA Backlight Driver and 4-Output TFT-LCD Bias

顶部

概览

4-Output TFT-LCD Bias Power
- 2.8V to 5.5V Input for the TFT-LCD Section
- Integrated 430kHz or 2.2MHz Boost and Buck-Boost Converters
- Positive and Negative 10mA Gate Voltage Regulators (Tripler/Inverting Doubler) with Adjustable Output Voltage
- Flexible Resistor-Programmable Sequencing through the SEQ Pin
- Undervoltage Detection on All Outputs
- Low-Quiescent-Current Standby Mode
4-Channel LED Backlight Driver
- Up to 150mA Current per Channel
- 4.5V to 42V Input Voltage Range
- Integrated Boost/SEPIC Controller (440kHz or 2.2MHz)
- Dimming Ratio 10,000:1 at 200Hz
- Adaptive Voltage Optimization to Reduce Power Dissipation in the LED Current Sinks
- Open-String, Shorted-LED, and Short-to-GND Diagnostics
Low EMI
- Phase-Shift Dimming of LED Strings
- Spread Spectrum on LED Driver and TFT
- Selectable Switching Frequency
I²C Interface for Control and Diagnostics
- Fault Indication through the FLTB pin and I²C
- Auto-Retry after Fault Detection
Overload and Thermal Protection
-40°C to +105°C Ambient Temperature Operation
40-Pin (6mm x 6mm) TQFN Package with Exposed Pad
AECQ100 Grade 1

应用

Evaluation Kit for the MAX25530

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应用

Demonstrates Robustness of MAX25530
2.8V to 5.5V Input Range for TFT Power Section
4.5V to 42V Input Range for LED Driver Section
2.2MHz or 430kHz I²C programmable Boost and Inverted Buck-Boost Switching Frequency with Spread-Spectrum Option on TFT Power Section
2.2MHz or 440kHz I²C programmable Boost Frequency with Spread-Spectrum Option on LED Driver Section with four 150mA LED drivers
TFT Section Default Output Voltages (Stand-alone Mode)
- +6V Output at 120mA (Step-Up Switching Regulator)
- -6V Output at 100mA (Inverting Buck-Boost Switching Regulator)
- +16V Output at 10mA (Positive-Charge Pump)
- -7V Output at 10mA (Negative-Charge Pump)
HB LED String Output Currents Configurable for 20mA, 50mA, 100mA, 120mA or 150mA
Flexible Resistor-Programmable TFT Output Sequencing (Stand-alone Mode)
Demonstrates Cycle-by-Cycle Current-Limit and Thermal-Shutdown Features on Boost LED Driver
Demonstrates Adaptive Voltage Optimization on LED Driver Section
I²C Programmability
Dedicated GUI
Proven PCB Layout and Thermal Design
Fully Assembled and Tested