MAX8722C Overview
Key Features
- Resonant operation maximizes striking capability and provides near-sinusoidal waveforms over the entire input range to improve CCFL lifetime
- The controller operates over a wide input voltage range (4.6V to 28V) with high power to light efficiency
- The MAX8722C achieves 10:1 dimming range by “chopping” the lamp current on and off using a digital pulsewidth modulation (DPWM) method
- The DPWM frequency can be accurately adjusted with a resistor or synchronized to an external signal
- The brightness is controlled by an analog voltage on the CNTL pin
- The device directly drives the four external n-channel power MOSFETs of the full-bridge inverter
- An internal 5.4V linear regulator powers the MOSFET drivers, the DPWM oscillator, and most of the internal circuitry
- The MAX8722C is available in a low-cost, 24-pin QSOP package and operates over a -40°C to +85°C temperature range
