MIC2289-34BML-TR

Voltage - Output:	34V
Base Part Number:	MIC2289
Supplier Device Package:	8-MLF® (2x2)
Package / Case:	8-VFDFN Exposed Pad, 8-MLF®
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Applications:	Backlight
Dimming:	Analog, PWM
Frequency:	1.2MHz
Current - Output / Channel:	750mA (Switch)
Series:	--
Voltage - Supply (Max):	10V
Voltage - Supply (Min):	2.5V
Number of Outputs:	1
Internal Switch(s):	Yes
Topology:	Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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MIC2289-34BML-TR Application Field and Working Principle

The MIC2289-34BML-TR belongs to the Power Management IC (PMIC) product family, specifically to LED Drivers. It is an extremely efficient driver for the white and RGB LEDs used in LCD TVs, mobile devices, and other indoor and outdoor backlighting applications. It offers a comprehensive feature set which includes Dual Independently Programmable Outputs with high current output capability (up to 30A/drain), High-Voltage Startup, True Output Dimming, Adjustable Output voltage, and High Temperature Operation.This device has a wide range of applications in LCD TVs, monitors, mobile devices, and other indoor and outdoor backlighting applications. It is specifically designed for usage in high-efficiency, high-current, high-voltage applications. It is designed with advanced power-saving features to deliver efficient power delivery and long battery life.The MIC2289-34BML-TR is an integrated PMIC solution for active-matrix LCD displays and LED backlight systems. It provides dual Buck channels, each capable of driving up to 30A of output current that can be programmed with independent voltage and current settings. The device includes several features such as thermal and over-current protection, as well as a soft-start function and a PWM dimming interface. The device also supports synchronization between channels to reduce input voltage and output current ripple.The working principle of the MIC2289-34BML-TR is based on the Buck-Boost converter circuit. The Buck-Boost converter is capable of providing both step-up and step-down DC/DC conversion. The device includes a high-voltage MOSFET to buffer the output current, and a high-efficiency synchronous PWM control scheme to reduce power loss and reduce ripple. Additionally, the device includes an on-chip over-current sensing circuit and thermal shutdown circuit to protect the device from thermal and over-current conditions.The MIC2289-34BML-TR also offers flexible integration and power management options with True Output Dimming. This feature allows the user to adjust the output voltage and current between a wide range of settings to accommodate various application requirements. The Dynamic Voltage Control (DVC) feature also allows for fine tuning of the output current and voltage for best efficiency and brightness control.In conclusion, the MIC2289-34BML-TR is an efficient and cost-effective LED driver with an extensive feature set and numerous applications in today’s LED products. It can be used in a wide range of LED backlighting and LED display applications, including LCD TVs, PCs, tablet PCs, and other consumer electronic products. The device provides high power efficiency, True Output Dimming, and adjustable output voltage, making it an ideal solution for high-voltage, high-current applications.

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