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Применения > > Evaluation Kit for the MAX8822 (MAX8822EVKIT)

Evaluation Kit for the MAX8822 (MAX8822EVKIT) (MAX8822EVKIT)

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.

Возможности

  • 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

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