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The LM3404/04HV are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 1.5A (typical) for step-down (Buck) regulators. Hysteretic controlled on-time and an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series-parallel connected LED arrays of varying number and type. LED dimming via pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set.
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Item code: |
LM3404MA |
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NS |
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SOP8 |
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¥12.50  Starting from: 10 pieces ¥9.50  Starting from: 100 pieces ¥8.75  Starting from: 500 pieces ¥8.00  Starting from: 1000 pieces ¥7.50  |
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Integrated with a 1A power switch, the LM3405 is a current-mode control switching buck regulator designed to provide a simple, high efficiency solution for driving high power LEDs. With a 0.205V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. Switching frequency is internally set to 1.6MHz, allowing small surface mount inductors and capacitors to be used. The LM3405 utilizes current-mode control and internal compensation offering ease of use and predictable, high performance regulation over a wide range of operating conditions. Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs, thermal shutdown, cycle-by-cycle current limit and over-current protection.
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Item code: |
LM3405XMK |
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Brand: |
NS |
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Package: |
SOT23-6L |
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Price: |
¥10.00  Starting from: 10 pieces ¥7.50  Starting from: 100 pieces ¥6.80  Starting from: 500 pieces ¥6.15  Starting from: 1000 pieces ¥5.75  |
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The LM3407 is a constant current output floating buck switching converter designed to provide constant current to high power LEDs. The device is ideal for automotive, industrial and general lighting applications. The LM3407 has an integrated power N-MOSFET that makes the application solution compact and simple to implement. An external 1% thick-film resistor allows the converter output voltage to adjust as needed to deliver constant current within 10% accuracy to a serially connected LED string of varying number and type. Converter switching frequency is adjustable from 300 kHz to 1 MHz. The LM3407 features a dimming input to enable LED brightness control by Pulse Width Modulation (PWM). Additionally, a separate enable pin allows for low power shutdown. An exposed pad eMSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution.
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Item code: |
LM3407MY |
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Brand: |
NS |
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Package: |
MSOP8 |
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Price: |
¥10.00  Starting from: 10 pieces ¥8.00  Starting from: 100 pieces ¥7.50  Starting from: 500 pieces ¥7.15  Starting from: 1000 pieces ¥6.85  |
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