LM3405A is a 1A constant current buck LED driver designed to provide a simple high efficiency solution for driving high power LEDs. With a 0.205V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. Switching frequency is internally set to 1.6MHz, allowing small surface mount inductors and capacitors to be used. The LM3405A utilizes current-mode control and internal compensation offering ease of use and predictable, high performance regulation over a wide range of operating conditions. With a maximum input voltage of 22V, it can drive up to 5 High-Brightness LEDs in series at 1A forward current with the single LED forward voltage of approximately 3.7V. Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs, thermal shutdown, cycle-by-cycle current limit and over-current protection.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | EVM User's guide | AN-1899 LM3405A eMSOP Evaluation Board (Rev. B) | 01 May 2013 | |
| Certificate | LM3405AXMYEVAL EU Declaration of Conformity (DoC) | 02 Jan 2019 | ||
| Application note | Powering & Dimming High-Brightness LEDs w/ LM3405 Constant-Current Buck Reg (Rev. A) | 01 May 2013 | ||
| User guide | LM3405A Reference Design for MR16 LED Bulb, 600mA User Guide | 27 Jan 2012 |
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