The LM3528 current mode boost converter offers two separate outputs. The first output (MAIN) is a constant current sink for driving series white LED's. The second output (SUB/FB) is configurable as a constant current sink for series white LED bias, or as a feedback pin to set a constant output voltage for powering OLED panels.
As a dual output white LED bias supply the LM3528 adaptively regulates the supply voltage of the LED strings to maximize efficiency and insure the current sinks remain in regulation. The maximum current per output is set via a single external low power resistor. An I2C compatible interface allows for independent adjustment of the LED current in either output from 0 to max current in 128 exponential steps. When configured as a white LED + OLED bias supply, the LM3528 can independently and simultaneously drive a string of up to 5 white LEDs and deliver a constant output voltage of up to21V for OLED panels.
Applications:
| Type | Title | Date | ||
|---|---|---|---|---|
| * | EVM User's guide | AN-1823 LM3528 Evaluation Board (Rev. A) | 30 Apr 2013 | |
| Certificate | LM3528TMEV EU Declaration of Conformity (DoC) | 02 Jan 2019 |
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