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See Technical Specifications

LM3407MY/NOPB

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

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

LM3407MY/NOPB
Datasheet:

LM3407MY/NOPB Datasheet (PDF)
Type:

DC DC Regulator
Topology:

Step-Down (Buck)
Internal Switch(s):

Yes
Number of Outputs:

1
EDA/CAD Models:

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LM3407MY/NOPB General 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.

Key Features

Input Operating Range 4.5 V to 30 V
Output Voltage Range: 0.1 V_IN to 0.9 V_IN
Accurate Constant Current Output
Independent Device Enable (CMOS Compatible) and PWM Dimming Control
Converter Switching Frequency Adjustable From 300 kHz to 1 MHz
No External Control Loop Compensation Required
Supports Ceramic and Low ESR Output Capacitors
Input Undervoltage Lockout (UVLO)
Thermal Shutdown Protection
MSOP-8 PowerPAD Package

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)LED Drivers	Series	-
Type	DC DC Regulator	Topology	Step-Down (Buck)
Internal Switch(s)	Yes	Number of Outputs	1
Voltage - Supply (Min)	4.5V	Voltage - Supply (Max)	30V
Voltage - Output	-	Current - Output / Channel	350mA
Frequency	300kHz ~ 1MHz	Dimming	PWM
Applications	Lighting	Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount	Base Product Number	LM3407
Product Category	LED Lighting Drivers	Mounting Style	SMD/SMT
Output Current	350 mA	Input Voltage, Min	4.5 V
Input Voltage, Max	30 V	Operating Frequency	300 kHz to 1 MHz
Output Voltage	Adjustable	Minimum Operating Temperature	- 40 C
Maximum Operating Temperature	+ 125 C	Features	PWM Dimming, Constant Current
Height	0.86 mm	Input Voltage	4.5 V to 30 V
Length	3 mm	Number of Channels	1 Channel
Output Type	Constant Current	Product	LED Drivers
Product Type	LED Lighting Drivers	Factory Pack Quantity	1000
Subcategory	Driver ICs	Supply Current - Max	980 uA
Width	3 mm	Unit Weight	0.001097 oz