The LM3409, LM3409-Q1, LM3409HV, and LM3409HV-Q1 are P-channel MOSFET (PFET) controllersfor step-down (buck) current regulators. They offer wide input voltage range, high-sidedifferential current sense with low adjustable threshold voltage and fast output enable/disablefunction 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 currentsup to 5 A are easily achievable.
The LM3409 devices use constant off-time (COFT) control to regulate an accurate constantcurrent without the need for external control loop compensation. Analog and PWM dimming are easy toimplement 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.
For all available packages, see the orderable addendum at the end of the data sheet.| Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | LM3409, -Q1, LM3409HV, -Q1 P-FET Buck Controller for High-Power LED Drivers datasheet (Rev. L) | PDF | HTML | 23 may 2016 |
| Application note | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 03 may 2013 | ||
| User guide | AN-2150 LM3450A Evaluation Board (Rev. B) | 03 may 2013 | ||
| EVM User's guide | AN-1953 LM3409HV Evaluation Board (Rev. D) | 01 may 2013 | ||
| User guide | AN-1954 LM3409 Demonstration Board (Rev. D) | 01 may 2013 | ||
| Application note | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 23 abr 2013 | ||
| User guide | LM3409HV MR16 Buck-Boost Reference Design User Guide | 27 ene 2012 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
This evaluation board showcases the LM3409HV PFET controller for a buck current regulator. It is designed to drive 12 LEDs (VO = 42V) at a maximum average LED current (ILED = 1.5A) from a DC input voltage (VIN = 48V). The switching frequency (fSW = 400 kHz) is targeted for the nominal operating (...)
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In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23880.
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| HVSSOP (DGQ) | 10 | Ultra Librarian |
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