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LM3429 Fiches technique(PDF) 1 Page - Texas Instruments |
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LM3429 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 62 page OVP nDIM LM3429 AGND VIN PGND NC DAP GATE COMP VIN CSH RCT IS HSP VCC HSN 1 2 3 4 5 6 7 14 13 12 11 10 9 8 ILED PWM Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3429, LM3429-Q1 SNVS616H – APRIL 2009 – REVISED JULY 2015 LM3429/-Q1 N-Channel Controller for Constant Current LED Drivers 1 Features 3 Description The LM3429 is a versatile high voltage N-channel 1 • LM3429-Q1 is AEC-Q100 Grade 1 Qualified for MosFET controller for LED drivers. It can be easily Automotive Applications configured in buck, boost, buck-boost and SEPIC • VIN Range From 4.5 V to 75 V topologies. This flexibility, along with an input voltage • Adjustable Current Sense Voltage rating of 75V, makes the LM3429 ideal for illuminating LEDs in a very diverse, large family of • High-Side Current Sensing applications. • 2- Ω, 1-A Peak MosFET Gate Driver Adjustable high-side current sense voltage allows for • Input Undervoltage Protection tight regulation of the LED current with the highest • Overvoltage Protection efficiency possible. The LM3429 uses Predictive Off- • PWM Dimming time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This • Analog Dimming method of control eases the design of loop • Cycle-by-Cycle Current Limit compensation while providing inherent input voltage • Programmable Switching Frequency feed-forward compensation. • Low Profile 14-lead HTSSOP Package The LM3429 includes a high-voltage startup regulator • Thermal Shutdown that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for 2 Applications adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions. Additional features • LED Drivers - Buck, Boost, Buck-Boost, SEPIC include analog dimming, PWM dimming, overvoltage • Indoor and Outdoor SSL protection, undervoltage lock-out, cycle-by-cycle current limit, and thermal shutdown. • Automotive • General Illumination Device Information(1) • Constant-Current Regulators PART NUMBER PACKAGE BODY SIZE (NOM) LM3429 HTSSOP (14) 5.00 mm × 4.40 mm LM3429-Q1 (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Boost Application Circuit 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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