MAX8821EVKIT：Evaluation Kit for the MAX8821
The MAX8821 evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating the MAX8821 white LED charge pump with a mono Class D audio amplifier and dual LDOs. The MAX8821 EV kit operates from a 2.7V to 5.5V input supply range and is controlled by an I²C interface. The MAX8821 features a high-efficiency, adaptive-mode inverting charge pump that drives up to six LEDs with constant current for uniform brightness.
The EV kit also includes Windows® 2000/XP/Vista®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the MAX8821. The EV kit software features an I²C interface to control the LED current, ramp-up/ramp-down time, and blink on/off-time. An internal temperature derating function reduces the current above +40°C to protect the LEDs.
The MAX8821 also features a mono Class D audio amplifier with adjustable gain, through the I²C interface, from -3dB to +24dB in ten 3dB steps. The I²C control interface selects the audio amplifier fixed-frequency mode or spread-spectrum mode, in addition to selecting individual LDO output voltages.
Key Features- Windows 2000/XP/Vista (32-Bit)-Compatible Software
- CMAXQBUSB+ Interface Board with USB PC Connection (Cable Included)
- Proven PCB Layout
- Fully Assembled and Tested
- White LED Inverting Charge Pump
- Independent Adaptive Current Regulators for Each LED
- Six Low-Dropout Current Regulators
- Flexible I²C Dimming Control for Each LED
- Ramp Up/Down Current Control for Each LED
- Low 70µA (typ) Quiescent Current
- TA Derating Function Protects LEDs
- Mono 2W Class D Loudspeaker Amplifier
- 85% Efficiency (RL = 8Ω, POUT = 600mW)
- Low 0.05% THD+N at 1kHz
- High 65dB PSRR at 1kHz
- Fully Differential Inputs
- -3dB to +24dB Gain Settings in 3dB Steps
- Integrated Click-and-Pop Suppression
- Low Quiescent Current
- Dual Low-Noise LDO
- 45µVRMS Output Noise, 73dB PSRR
- Flexible I²C-Controlled Output Voltages
- 200mA and 300mA Output Current Drive
| Applications/Uses- Cell Phones and Smartphones
- MP3 Players, GPS Devices
- PDAs, Digital Cameras, Camcorders
|
DataSheet
Ordering Information
| Part Number | Status | Recommended Replacement | Package |
|---|
| MAX8821EVKIT+ | Active | | EVKIT; |
