Integrated Circuits (ICs)

LM3429Q1MHX/NOPB

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AUTOMOTIVE SIMPLE N-CHANNEL CONTROLLER FOR CONSTANT CURRENT LED DRIVERS

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Search across all available documentation for this part.

DocumentsLED Drivers for Automotive Exterior Applications (Rev. B)MR16 or PAR38 LED Bulb Ref Design w/the LM3429 LED Driver User Guide +6

Integrated Circuits (ICs)

LM3429Q1MHX/NOPB

Active

Texas Instruments

AUTOMOTIVE SIMPLE N-CHANNEL CONTROLLER FOR CONSTANT CURRENT LED DRIVERS

Deep-Dive with AI

DocumentsLED Drivers for Automotive Exterior Applications (Rev. B)MR16 or PAR38 LED Bulb Ref Design w/the LM3429 LED Driver User Guide +6

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM3429Q1MHX/NOPB

Dimming	Analog, PWM
Frequency	2 MHz
Grade	Automotive
Internal Switch(s)	False
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Package / Case	14-PowerTSSOP
Package / Case [x]	0.173 in
Package / Case [y]	4.4 mm
Qualification	AEC-Q100
Supplier Device Package	14-HTSSOP
Topology	SEPIC, Step-Down (Buck), Step-Up (Boost)
Type	DC DC Controller
Voltage - Supply (Max) [Max]	75 V
Voltage - Supply (Min) [Min]	4.5 V

LM3429-Q1 Series

Automotive Simple N-channel controller for constant current LED drivers

Part	Features	Outputs and Type	Outputs and Type	Current - Output / Channel [custom]	Utilized IC / Part	Supplied Contents	Voltage - Input [Min]	Voltage - Input [Max]	Frequency	Type	Grade	Voltage - Supply (Min) [Min]	Voltage - Supply (Max) [Max]	Qualification	Mounting Type	Dimming	Supplier Device Package	Topology	Package / Case	Package / Case [y]	Package / Case [x]	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs
Texas Instruments LM3429BKBSTEVAL/NOPB	Dimmable	Non-Isolated	1	1 A	LM3429	Board(s)	10 V	70 V
Texas Instruments LM3429Q1MH/NOPB									2 MHz	DC DC Controller	Automotive	4.5 V	75 V	AEC-Q100	Surface Mount	Analog PWM	14-HTSSOP	SEPIC Step-Down (Buck) Step-Up (Boost)	14-PowerTSSOP	4.4 mm	0.173 in	-40 °C	125 ¯C	1
Texas Instruments LM3429Q1MHX/NOPB									2 MHz	DC DC Controller	Automotive	4.5 V	75 V	AEC-Q100	Surface Mount	Analog PWM	14-HTSSOP	SEPIC Step-Down (Buck) Step-Up (Boost)	14-PowerTSSOP	4.4 mm	0.173 in	-40 °C	125 ¯C	1
Texas Instruments LM3429MH/NOPB									2 MHz	DC DC Controller		4.5 V	75 V		Surface Mount	Analog PWM	14-HTSSOP	SEPIC Step-Down (Buck) Step-Up (Boost)	14-PowerTSSOP	4.4 mm	0.173 in	-40 °C	125 ¯C	1

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 3.83
		10	$ 3.44
		25	$ 3.25
		100	$ 2.82
		250	$ 2.67
		500	$ 2.40
		1000	$ 2.02
	Digi-Reel®	1	$ 3.83
		10	$ 3.44
		25	$ 3.25
		100	$ 2.82
		250	$ 2.67
		500	$ 2.40
		1000	$ 2.02
	Tape & Reel (TR)	2500	$ 1.79
Texas Instruments	LARGE T&R	1	$ 2.89
		100	$ 2.53
		250	$ 1.77
		1000	$ 1.43

Description

General part information

LM3429-Q1 Series

The LM3429 is a versatile high voltage N-channel MosFET controller for LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75V, makes the LM3429 ideal for illuminating LEDs in a very diverse, large family of applications.

Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3429 uses Predictive Off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.

The LM3429 includes a high-voltage startup regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions. Additional features include analog dimming, PWM dimming, overvoltage protection, undervoltage lock-out, cycle-by-cycle current limit, and thermal shutdown.