LM3404HVMR

Voltage - Output:	73V
Base Part Number:	LM3404
Supplier Device Package:	8-SO PowerPad
Package / Case:	8-PowerSOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Applications:	Automotive, Lighting
Dimming:	PWM
Frequency:	1MHz
Current - Output / Channel:	1A
Series:	--
Voltage - Supply (Max):	75V
Voltage - Supply (Min):	6V
Number of Outputs:	1
Internal Switch(s):	Yes
Topology:	Step-Down (Buck)
Type:	DC DC Regulator
Part Status:	Discontinued at Digi-Key
Packaging:	Tube

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PMIC - LED Drivers
The LM3404HVMR is a high-voltage white LED driver integrated circuit (IC) specifically designed for white LED applications. It is an ideal energy-saving alternative to traditional fluorescent lighting, with advantages like low power consumption and long life. The LM3404HVMR is well suited for a wide range of applications, from residential lighting and backlighting for mobile phones and TVs to automotive lighting and automotive rear-view mirror LED applications.The LM3404HVMR is designed to drive up to 32 white LEDs in parallel, at up to 10 mA and 20 V each. It has a power supply range of 3 V to 32 V, and a maximum output current of 1.5 A. The LM3404HVMR has a wide range of features and benefits, including adjustable current control, thermal foldback, open-LED and short-LED protection, and programmable current slew rate. The LM3404HVMR is capable of driving up to four series strings of up to eight LEDs in parallel, or a single string of up to 32 LEDs in parallel. The parallel string connection configuration allows the LM3404HVMR to achieve very high density white LED backlighting without the need for multiple driver ICs. The LM3404HVMR is protected against input under-voltage lockout, thermal shutdown and open-LED and short-LED protection.The LM3404HVMR is designed for use with a switching buck (step-down) DC-DC converter. The switching buck converter allows the LM3404HVMR to achieve high efficiency and low thermal stress, providing higher reliability and longer life. The LM3404HVMR also has programmable current slew rates, allowing for optimised efficiency for various loads. The LM3404HVMR has built-in adjustable current control to control the total LED current. This allows the LED currents to be regulated to achieve uniform brightness, provided LED variations are taken into account. Also, the device can be used in combination with the optional LM3404LOAD resistor to ensure that the LED string always operates with a current that is within the safe operating limits of the LED. The LM3404HVMR also has adjustable thermal foldback circuitry that reduces the LED current when the device temperature rises beyond optimal levels. The thermal foldback can be programmed by setting two external resistors, making it very robust against high temperatures while protecting the device against heat-dissipation-related issues. In addition, the LM3404HVMR has protection features such as open-LED and short-LED protection to protect the LEDs from damage. These protection measures are designed to detect any abnormal conditions in the LED-string and react accordingly, to protect both the LEDs and the IC. The open-LED protection detects any open-circuits in the LED string, while the short-LED protection detects any short-circuits. In conclusion, the LM3404HVMR is a versatile, high-voltage monolithic white LED driver IC, specifically designed for driving up to 32 LEDs in parallel. It offers easy and adjustable current control, as well as built-in thermal protection. With its wide range of features and benefits, the LM3404HVMR is well suited for a range of applications, from residential lighting to automotive lighting and backlighting.

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