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MAX8822EVKIT

Evaluation Kit for the MAX8822

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet Evaluation Kit for the MAX8822 Feb 18, 2008

Support & Training

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Key Features

  • Powers Up to 4 White LEDs
    • Independent Adaptive Voltage Supply for Each LED
    • 24mA to 0.1mA Dimming Range
    • 1% (typ) Current Accuracy and 0.3% (typ) Current Matching
  • Dual 200mA Low-Noise, High PSRR LDOs
    • 16 Selectable LDO Output Voltage Combinations from OFF Up to 3.3V
  • MAXQ2000 Microprocessor Circuit for LED and LDO Serial-Pulse Control
    • Sequential UP/DOWN LED Dimming Pushbutton Control
    • DIP-Selectable LDO Output Voltages
  • 2.7V to 5.5V Input Range
  • Selectable Microprocessor Circuit Power Input (IN1, IN2)
  • WLED and LDO Short-Circuit and Thermal Protection
  • Small, Low-Profile Components
  • Lead-Free and RoHS-Compliant
  • Fully Assembled and Tested

Applications/Uses

  • Cell Phones and Smartphones
  • White LED Backlighting

Description

The MAX8822 evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) that demonstrates the MAX8822 ultra-efficient negative charge-pump LED driver with dual LDOs. The MAX8822 drives up to four white LEDs (WLEDs) for backlighting and contains two 200mA, low-noise, high power-supply-rejection-ratio (PSRR) LDOs to power external camera modules or other loads. The EV kit includes a MAXQ2000 microcontroller circuit that provides the serial-pulse control necessary to adjust WLED brightness and LDO output voltages. Through the MAXQ2000, WLED brightness levels are sequentially incremented/decremented between 0.1mA and 24mA and shut down by pushbutton controls. Sixteen different LDO output-voltage combinations (from off to 3.3V) are selected by DIP-switch positions and latched by a pushbutton. The MAX8822 IC includes soft-start, WLED and LDO short-circuit protection, and thermal shutdown.

Simplified Block Diagram

Technical Docs

Data Sheet Evaluation Kit for the MAX8822 Feb 18, 2008

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .