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LM3409HV Datasheet(PDF) 1 Page - Texas Instruments |
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LM3409HV Datasheet(HTML) 1 Page - Texas Instruments |
1 / 45 page IADJ EN CSN LM3409/HV UVLO D1 L1 CIN VIN ILED VCC COFF GND Q1 CSP CF ROFF PGATE COFF RUV2 RUV1 DAP VIN VO RSNS 1 2 3 4 5 6 7 8 9 10 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design 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. LM3409, LM3409-Q1, LM3409HV, LM3409HV-Q1 SNVS602L – MARCH 2009 – REVISED JUNE 2016 LM3409, -Q1, LM3409HV, -Q1 P-FET Buck Controller for High-Power LED Drivers 1 1 Features 1 • LM3409-Q1 and LM3409HV-Q1 are Automotive Grade Products: AEC-Q100 Grade 1 Qualified • 2- Ω, 1-A Peak MOSFET Gate Drive • VIN Range: 6 V to 42 V (LM3409, LM3409-Q1) • VIN Range: 6 V to 75 V (LM3409HV, LM3409HV- Q1) • Differential, High-Side Current Sense • Cycle-by-Cycle Current Limit • No Control Loop Compensation Required • 10,000:1 PWM Dimming Range • 250:1 Analog Dimming Range • Supports All-Ceramic Output Capacitors and Capacitor-less Outputs • Low-Power Shutdown and Thermal Shutdown • Thermally Enhanced 10-Pin, HVSSOP Package 2 Applications • LED Driver • Constant Current Source • Automotive Lighting • General Illumination 3 Description The LM3409, LM3409-Q1, LM3409HV, and LM3409HV-Q1 are P-channel MOSFET (PFET) controllers for step-down (buck) current regulators. They offer wide input voltage range, high-side differential current sense with low adjustable threshold voltage and fast output enable/disable function and a thermally enhanced 10-pin, HVSSOP package. These features combine to make the LM3409 family of devices ideal for use as constant current sources for driving LEDs where forward currents up to 5 A are easily achievable. The LM3409 devices use constant off-time (COFT) control to regulate an accurate constant current without the need for external control loop compensation. Analog and PWM dimming are easy to implement and result in a highly linear dimming range with excellent achievable contrast ratios. Programmable UVLO, low-power shutdown, and thermal shutdown complete the feature set. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM3409 HVSSOP (10) 3.00 mm × 3.00 mm PDIP (14) 19.177 mm × 6.35 mm LM3409-Q1 HVSSOP (10) 3.00 mm × 3.00 mm LM3409HV LM3409HV-Q1 (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Schematic |
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