MAX16840 Overview
Description
The MAX16840 is an LED driver IC for lighting applications. It includes all the necessary features to design lowcomponent-count LED drivers for 12V AC and 24V AC input (e.g., MR16) light bulbs.
Key Features
- to design lowcomponent-count LED drivers for 12V AC and 24V AC input (e.g., MR16) light bulbs
- The IC can be used in buck, boost, and buck-boost topologies and features
- It has an integrated 0.2I (max), 48V switching MOSFET
- The IC uses constant-frequency average current-mode control
- It senses the input current through the voltage at the FB pin, and regulates its average
- An input pin (REFI) allows the setting of the input-current level
- This nonlinear behavior of REFI allows its use to achieve thermal foldback, by connecting it to an NTC resistor
- EXT drives an external npn transistor
- Once the UVLO threshold of 5.5V is crossed on IN, EXT is pulled to ground and the external npn transistor is turned off
- The IC is available in a 3mm x 3mm, 10-pin TDFN power package, and is rated over the -40NC to +125NC operating temperature range
