LM3409MY_PFET Buck Controller for High Power LED Drives

Model:	LM3409MY_PFET Buck Controller for High Power LED Drives
Category:	Chipshooters / Chip Mounters
Condition:	new
Location:	China
Offered by:	Jotrin Electronics Limited

The LM3409/09HV are P-channel MOSFET (PFET) controllers for step-down (buck) current regulators which are ideal for driving LED loads. They have wide input voltage range allowing for regulation of a variety of LED loads.
The high-side differential current sense, with low adjustable threshold voltage, provides an excellent method for regulating output current while maintaining high system efficiency.
The LM3409/09HV uses a Controlled Off-Time (COFT) architecture that allows the converter to be operated in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) with no external control loop compensation, while providing an inherent cycle-by-cycle current limit. The adjustable current sense
threshold provides the capability to amplitude (analog) dim the LED current over the full range and the fast output enable/disable function allows for high frequency PWM dimming using no external components.
When designing, the maximum attainable LED current is not internally limited because the LM3409/09HV is a controller. Instead it is a function of the system operating point, component choices, and switching frequency allowing the LM3409/09HV to easily provide constant currents up to 5A. This simple controller contains all the features necessary to implement a high-efficiency versatile LED drive.

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