LM3407 Series

350-mA constant, constant current output floating buck switching converter for high power LEDs

Catalog

350-mA constant, constant current output floating buck switching converter for high power LEDs

Part	Outputs and Type	Utilized IC / Part	Features	Voltage - Output	Supplied Contents	Voltage - Input [Min]	Voltage - Input [Max]	Current - Output / Channel	Voltage - Supply (Min) [Min]	Voltage - Supply (Max)	Frequency [Min]	Frequency [Max]	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Applications	Type	Package / Case	Package / Case [custom]	Package / Case [custom]	Supplier Device Package	Dimming	Topology	Mounting Type	Outputs and Type
Texas Instruments LM3407EVAL/NOPB	1 Non-Isolated Output	LM3407	Dimmable	4.5 V	Board(s)	4.5 V	30 V	350 mA
Texas Instruments LM3407MYX/NOPB								350 mA	4.5 V	30 V	300 kHz	1 MHz	1	-40 °C	125 ¯C	Lighting	DC DC Regulator	8-MSOP 8-PowerTSSOP	3 mm	0.118 in	8-HVSSOP	PWM	Step-Down (Buck)	Surface Mount
Texas Instruments LM3407EVAL	Non-Isolated	LM3407	Dimmable	4.5 V	Board(s)	4.5 V	30 V	350 mA																	1

Catalog

350-mA constant, constant current output floating buck switching converter for high power LEDs

Key Features

• Input Operating Range 4.5 V to 30 VOutput Voltage Range: 0.1 VINto 0.9 VINAccurate Constant Current OutputIndependent Device Enable (CMOS Compatible) and PWM Dimming ControlConverter Switching Frequency Adjustable From 300 kHz to 1 MHzNo External Control Loop Compensation RequiredSupports Ceramic and Low ESR Output CapacitorsInput Undervoltage Lockout (UVLO)Thermal Shutdown ProtectionMSOP-8 PowerPAD PackageInput Operating Range 4.5 V to 30 VOutput Voltage Range: 0.1 VINto 0.9 VINAccurate Constant Current OutputIndependent Device Enable (CMOS Compatible) and PWM Dimming ControlConverter Switching Frequency Adjustable From 300 kHz to 1 MHzNo External Control Loop Compensation RequiredSupports Ceramic and Low ESR Output CapacitorsInput Undervoltage Lockout (UVLO)Thermal Shutdown ProtectionMSOP-8 PowerPAD Package

Description

The LM3407 device is a constant current output floating buck switching converter designed to provide constant current to high-power LEDs. The device is ideal for automotive, industrial, and general lighting applications. The LM3407 has an integrated power N-channel MOSFET that makes the application solution compact and simple to implement. An external 1% thick-film resistor allows the converter output voltage to adjust as needed to deliver constant current within 10% accuracy to a serially connected LED string of varying number and type. Converter switching frequency is adjustable from 300 kHz to 1 MHz. The LM3407 features a dimming input to enable LED brightness control by Pulse Width Modulation (PWM). Additionally, a separate enable pin allows for low-power shutdown. An exposed pad MSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution. The LM3407 device is a constant current output floating buck switching converter designed to provide constant current to high-power LEDs. The device is ideal for automotive, industrial, and general lighting applications. The LM3407 has an integrated power N-channel MOSFET that makes the application solution compact and simple to implement. An external 1% thick-film resistor allows the converter output voltage to adjust as needed to deliver constant current within 10% accuracy to a serially connected LED string of varying number and type. Converter switching frequency is adjustable from 300 kHz to 1 MHz. The LM3407 features a dimming input to enable LED brightness control by Pulse Width Modulation (PWM). Additionally, a separate enable pin allows for low-power shutdown. An exposed pad MSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution.