Features • Internal 40V Startup Regulator • 1A Peak MOSFET Gate Driver • VIN Range 6V to 40V • Duty Cycle Limit in Excess of 90% • Programmable UVLO with Hysteresis • Cycle-by-Cycle Current Limit • External Synchronizable (AC-coupled) • Single Resistor Oscillator Frequency Set • Slope Compensation • Adjustable Soft-start • LLP-12 (3mm x 3mm) Description The LM3430 is a high voltage low-side N-channel MOSFET controller. Ideal for use in a boost regulator, the LM3430 can power the LED backlight in LCD panels, such as in notebook PCs. It contains all of the features needed to implement single ended primary topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing inherent input voltage feed-forward. The LM3430 includes a start-up regulator that operates over a wide input range of 6V to 40V. The PWM controller is designed for high speed capability including an oscillator frequency range up to 2 MHz and total propagation delays less than 100 ns. Additional features include an error amplifier, precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope compensation, soft-start, external synchronization capability and thermal shutdown. The LM3430 is available in the LLP-12 package. Applications • LED Backlight Driver (companion to LM3432) • Boost Converter • SEPIC Converter

Also Recommended LM3481▲ No DHC, Vin 2.97V To 48V, MSOP-10 Package LM5020▲ No DHC, Vin 13V To 100V, MSOP-10 Package, All Other Features Identical LM5022▲ No DHC, Vin 6V To 60V, MSOP-10 Package, All Other Features Identical MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LM3430 Boost Controller for LED Backlighting	571 Kbytes	16-Mar-07	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1529: Application Note 1529 LM3430 Evaluation Board	2770 Kbytes	21-Aug-07	中文
	AN-1679: Application Note 1679 LED Backlighting Solution with LM3430 and LM3432	2763 Kbytes	18-Sep-07

More Application Notes

Title		Size	Date	Other Language
	AN-1937: Application Note 1937 LM3433 10A to 40A LED Driver Evaluation Board	1669 Kbytes	14-Jan-10
	AN-1907: Application Note 1907 LM3423 Buck-Boost Configuration Evaluation Board	879 Kbytes	8-Dec-08
	AN-1736: Application Note 1736 LM3433 HB LED Driver Evaluation Kit	1011 Kbytes	4-Feb-08
	AN-1764: Application Note 1764 LM3431 Evaluation Board	588 Kbytes	10-Jan-08	中文
	AN-1793: Application Note 1793 LM3433 4A to 20A LED Driver Evaluation Board	701 Kbytes	25-Aug-08	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM3430SD/NOPB LM3430SD RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1000 AVNET-EM Worldwide 1000 DIGIKEY Worldwide 2352 FARNELL Europe and Asia 930 FUTURE Worldwide 720 NEWARK Americas 693 RS COMPONENTS Worldwide 955	$1.00 each at 1K+ pcs	reel of 1000
LM3430SDX/NOPB LM3430SDX RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.00 each at 1K+ pcs	reel of 4500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Design Tools

Title	Size	Date
Article - Methods and Features of LED Drivers

CAD Symbols and Models Download LM3430 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM3430SD	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM3430SDX	ABCD150XV1	0	3868	0	0	2595000	2	736338335

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.