LM4970SD/NOPB Integrated Circuits (ICs)

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The LM4970SD/NOPB is a highly integrated Pulse Width Modulation (PWM) current regulator and protector of LEDs drivers. It is designed to drive high and medium pressing power (HPP and MPP) LEDs in a highly efficient and cost- effective way. It is also suitable for any application where a low voltage, low noise and low current regulator is needed. This product is a part of the LM499 family. It is a high-performance and cost-effective solution for lighting applications that require high luminous intensity of LEDs and protection against short-circuit faults or higher voltage supply.

The LM4970SD/NOPB is a jitter-free, fixed frequency, PWM current source used to drive LEDs. It features a wide input voltage range, from 0.8V to 40V, a wide output current range up to 1.5A and is housed in a SSOP-10 package. The wide output current range allows it to drive as high as three buck converters, two of which are highly robust against over-voltage, making the product suitable for lighting applications. The large output current range also allows it to drive multiple LEDs in either series or parallel, making it an ideal choice for luminaires.

In order to provide the safest and most reliable operation of the LM4970, built-in current limit protection taps are integrated into the package. By connecting to external sense resistor, this product can be used as a voltage regulator, allowing it to provide a steady output current up to 1.5A. The presence of over-temperature limit function allows for easy system protection in the case of excessive LED load or short-circuit. The PWM frequency is adjustable, which allows the user to pick the proper frequency for the application.

The LM4970SD/NOPB has several key features that makes it ideally suited for LED driving applications. It includes integrated high-side/low-side current sense amplifier and current limit/protect devices. Without external components, the product can achieve a wide input voltage range (from 0.8V to 40V), wide peak current control up to 1.5A and voltage regulation up to 10V. The low noise operation, the wide operating temperature range (-40°C to +125°C) and the integrated high-side/low-side current senses amplifier guarantees optimal performance for both linear and PWM applications.

The LM4970 is suitable for cost-sensitive, high power LED applications, including flashing/fading, blinking and dimming applications. It is also easy to integrate into system designs, eliminating board complexity due to the integrated current sense amplifiers and current limit devices. All these features make the LM4970 an ideal choice for LED driving applications.

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