Maxim Integrated MAX14521EETG T

Description
The MAX14521E is a quad-output high-voltage DC-AC converter that drives four electroluminescent (EL) lamps. It features a 2.7V to 5.5V input range, allowing it to accept various voltage sources like single-cell lithium-ion batteries. The lamp outputs generate up to 300Vp-p for maximum lamp brightness. The high-voltage outputs are ESD protected up to ±15kV Human Body Model (HBM), ±6kV Contact Discharge, and ±8kV Air Gap Discharge.
The MAX14521E uses a high-voltage full-bridge output stage to convert the high voltage generated by the boost converter to a sinusoidal output waveform. It utilizes a high-frequency spread-spectrum oscillator to reduce EMI/EFI generation.
The device provides an I2C interface to set the boost converter and EL output switching frequencies through an 8-bit register and the peak output voltages with 5 bits of resolution. It also offers an adjustable automatic ramping feature that slowly increases or decreases the peak output voltage when the output amplitude changes. The slew rate of the automatic ramp is set with 3 bits of resolution through the I2C interface and is independent for each channel.
The MAX14521E features an audio auxiliary input (AUX) that modulates the EL output voltage and frequency for dynamic lighting effects.

Features
Integrated ±15kV ESD protection
Low number of needed discrete components
4mm x 4mm, 24-pin TQFN package
300Vp-p maximum output for highest brightness
±3% EL output frequency accuracy for truest EL panel color
Individually adjustable output brightness ramping rate and individual dimming control
Audio input for dynamic lighting effects
I2C interface for control of brightness, EL frequency, boost frequency, shape
Sinusoidal output for low audible noise
High-frequency spread-spectrum oscillator reduces EMI/EFI generation
Ideal for battery-powered devices
100nA shutdown current
2.7V to 5.5V input voltage range

Applications
Keypad backlighting
LCD backlighting
PDAs
Smartphones