XRP7620IHTR-F

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PMIC - LED Drivers is a key and important part in different products and applications. XRP7620IHTR-F is one of the respected products in this subject, which has been well received by customers. This article will introduce the working principle and application field of XRP7620IHTR-F.

First, XRP7620IHTR-F is an integrated step-down LED driver which needs to be connected with a dc input voltage (4.2V~20V). It is designed to drive up to 10 strings of LEDs at up to 35mA per string with the combined peak current up to 1.5A. Furthermore, the built-in 1.8V voltage regulator will be provided to the FBx pin when the electrical parameters of the system significantly changes between the power on and power off periods. It is realized to reduce the LED current ripple due to changing LED forward voltage.

In addition, XRP7620IHTR-F is featured with the PFM-PWM operating mode. Users can easily select the desired operating mode through the open pin, which is internally connected to a pull-down resistor. When the open pin is connected to the VIN, the device will enter PFM (pulse frequency modulation) mode with higher efficiency. Otherwise, it will remain in PWM (pulse-width modulation) mode. Also the frequency of the internal oscillator can be modified via the open pin with default frequency of 1MHz.

Moreover, it is able to recognize the number of strings of LEDs and provide accurate current-based dimming control. This means that users can choose from analog current dimming control or digital signal dimming control based on their own requirements. At the same time, a built-in under-voltage lock-out (UVLO) restricts the power on of the device until the VIN is at an appropriate level of greater than 4.2V. It prevents possible damage or malfunction caused by incorrect startup sequence.

In terms of its application fields, we can easily find that XRP7620IHTR-F is widely used in many areas such as commercial, industrial, and residential applications as it has multiple features that significantly improve system energy efficiency and reduce complications associated with remote dimming. For commercial applications, it can help control the multiple strings of LEDs in outdoor lighting, such as street lamps, landscape lighting, etc. For industrial applications, it can be used for the multiple strings of LEDs in the machine vision. Moreover, it may also be used for the backlight of LCD displays in the residential applications.

To sum up, XRP7620IHTR-F, as one of the well-known products in PMIC-LED Drivers, has such great features as multi-string LED driver, PFM/PWM operating mode, analog/digital current dimming control, and so on. Its application field is diverse and its advantages are plenty that make this product valuable. It is believed that it will be widely used in more areas and become more popular in future.

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