The LM36922H is an
ultra-compact, highly efficient, two-string white-LED driver designed for LCD display backlighting. The
device can power up to 12 series LEDs at up to 25 mA per string. An adaptive current regulation
method allows for different LED voltages in each string while maintaining current regulation.
The LED current is adjusted via an I2C interface or through a
logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus
allowing for a wide range of PWM frequencies with noise-free operation from 50 µA to 25 mA.
Other features include an auto-frequency mode, which can automatically change the
frequency based on load current in order to optimize efficiency.
The device operates over the 2.5-V to 5.5-V input voltage range and a –40°C to +85°C
For all available packages, see the orderable addendum at the
end of the data sheet.
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