LT3476IUHF#PBF

Voltage - Supply (Max):	16V
Base Part Number:	LT3476
Supplier Device Package:	38-QFN (5x7)
Package / Case:	38-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Applications:	Backlight
Dimming:	PWM
Frequency:	200kHz ~ 2MHz
Current - Output / Channel:	1.5A (Switch)
Voltage - Output:	2.2 V ~ 36 V
Series:	--
Voltage - Supply (Min):	2.8V
Number of Outputs:	4
Internal Switch(s):	Yes
Topology:	Step-Down (Buck), Step-Up (Boost)
Type:	DC DC Regulator
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tube

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The LT3476IUHF#PBF is a type of power management integrated circuit [1](PMIC). In particular, it is a LED driver that provides variable output, high voltage control and fast turn-on times. It is designed for applications such as portable lighting, flashlights, LED displays, decorative LED lighting, LED signage, LED lamps, and LED back lights.

Working Principle

The LT3476IUHF#PBF is designed to provide high current drive for high power LEDs. It is capable of driving up to 40 A continuous current and up to 75 A peak current. It also supports a wide input voltage range from 3.3V to 20V, allowing it to be used in a wide range of applications. The LT3476IUHF#PBF features a step-up/down switching regulator that is capable of providing up to 75 W of output power. It has a programmable frequency range of 200 kHz to 2.4 MHz and a synchronous rectifier to reduce power dissipation. The device also features an integrated low-dropout (LDO) linear regulator for controlling the output voltage. The LT3476IUHF#PBF is also capable of dimming control with its integrated PWM controller and analog control. The PWM controller features programmable frequency, duty cycle, and active time settings to provide precise control over the light intensity. The analog control pin can be used to adjust the output voltage and current to control the brightness of the LEDs. The device also supports a variety of input sources such as PWM, analog dimming, and digital control.

Conclusion

The LT3476IUHF#PBF is a high-performance power management IC that is designed to provide high current drive and voltage regulation for high power LEDs. It features a step-up/down switching regulator, a programmable frequency range, and an integrated LDO linear regulator for controlling the output voltage. It also provides dimming control with its integrated PWM controller and analog control. It is suitable for a wide range of applications such as portable lighting, flashlights, LED displays, decorative LED lighting, LED signage, LED lamps, and LED back lights.

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