General Description
The ELP3322 is a 1MHz PWM boost switching regulator designed for constant-current white LED driver
applications.
The ELP3322 can drive a string of up to 8 white LEDs in series, ensuring uniform brightness and Eliminating several ballast resistors.
The ELP3322 implements a constant frequency 1MHz PWM control scheme.
The high frequency PWM operation also saves board space by reducing external component sizes.
To improve efficiency, the feedback voltage is set to 200 mV, which reduces the power dissipation in the current setting resistor.
Features
◆High Efficiency: 92%
◆1MHzFixed-Frequency PWM Operation
◆Maximum Output Voltage up to 29V
◆Operating Range : 2.2V to 5.5V
◆Shutdown Supply Current:<1uA
◆Available in SOT23-6 Package
◆Built-in 29V Over Voltage Protection
◆Minimize the External Component
◆RoHS Compliant and 100% Lead (Pb)-Free
Applications
◆WLED Backlight driver
◆OLED Backlight driver
◆PDA
◆MID/PTV
