LM27964SQX-A/NOPB

Voltage - Output:	2 V ~ 4 V
Base Part Number:	LM27964
Supplier Device Package:	24-WQFN (4x4)
Package / Case:	24-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-30°C ~ 85°C (TA)
Applications:	Backlight
Dimming:	I²C
Frequency:	700kHz
Current - Output / Channel:	30mA, 80mA
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	2.7V
Number of Outputs:	7
Internal Switch(s):	Yes
Topology:	Switched Capacitor (Charge Pump)
Type:	DC DC Regulator
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

A LED driver is an electronic device that regulates the flow of electricity to a LED light. It converts the voltage or current input to the desired level required for a LED to illuminate. The LM27964SQX-A/NOPB is a high-performance, constant current LED driver from Texas Instruments that drives a single or multi-string LEDs with up to 30V input voltage from a wide input voltage range, making it ideal for automotive, industrial and consumer applications.

Application Field

The LM27964SQX-A/NOPB is a high-efficiency, step-down DC-DC converter with a constant current output. It enables energy-saving and brighter LED designs in a wide range of applications such as automotive lighting, industrial lighting, consumer lighting and more.For automotive lighting applications, the LM27964SQX-A/NOPB provides a low power dissipation solution with a low quiescent current of less than 10µA and a single string LED current of up to 1.2A. It is also optimized for fanless operation, enabling silent and efficient LED lighting in-vehicle.In industrial and consumer lighting applications, the LED driver is suitable for LED panel light bars, LED decorative lights, LED spotlights and landscape lighting among many other applications. It features a wide input voltage range, up to 32V, which gives it excellent flexibility and compatibility with different power sources. Additionally, it is also highly efficient and can drive multiple strings of LEDs while keeping power dissipation and thermal resistance to a minimum.

Features and Benefits

The LM27964SQX-A/NOPB features a low ripple current, adjustable soft start and thermal protection, making it an optimal solution for high-performance LED lighting applications. The low ripple current of the LM27964SQX-A/NOPB helps maintain longer LED illumination time by avoiding any light flickering or dimming. The adjustable soft start feature prevents inrush currents from damaging the LEDs and ensures smooth power on/off transitions. The thermal protection feature of the LED driver also safeguards the LEDs from any damage caused due to over-temperature. All these features combine to make the LM27964SQX-A/NOPB an ideal solution for high performance LED lighting applications.

Workings principle

The LM27964SQX-A/NOPB is a high-performance, constant current LED driver that operates in a step-down configuration. It uses two external power MOSFETs and an inductor to convert the input voltage to a stable, constant current output.The LM27964SQX-A/NOPB step-down LED driver uses a switched-mode power supply (SMPS) to control the voltage transfer ratio. It consists of an internal oscillator, a power switching circuit and a voltage feedback control circuit. The oscillator generates a frequency signal, which is supplied to the power switching circuit. This switching circuit then converts the voltage from the input voltage source to the desired output voltage. The voltage feedback control circuit then compares the output voltage with a reference voltage and adjusts the switching frequency accordingly, ensuring a stable output voltage. The LM27964SQX-A/NOPB also features a wide input voltage range and can be used with a wide variety of power sources. It is also highly efficient due to its low power dissipation, meaning that it can be used for longer periods of time without worrying about thermal issues.

Conclusion

The LM27964SQX-A/NOPB is a high-performancw, constant current LED driver optimized for automotive, industrial and consumer lighting applications. It features wide input voltage range, up to 32V, adjustable soft start and thermal protection. It also has low power dissipation and a low quiescent current of less than 10µA, making it an optimal choice for efficient and reliable LED lighting.

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