LDS8865002-T2-250

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Power management integrated circuits (PMICs) are computer components specifically designed to efficiently manage power supply and battery power in electronic devices. LED drivers are a specific type of PMICs, which are often used in applications where the management of LED power is critical to the life and performance of the device they are used in. The LDS88652-T2-250 is an LED driver from Toshiba which offers many features and design options. This article will explore the properties and working principles of the LDS88652-T2-250 LED driver as well as its application fields.

Features and Design Options

The LDS88652-T2-250 is a unique type of LED driver which is specifically designed for powering up to 6 strings of LEDs independently in a common single-stage buck-Boost converter. It offers an input voltage range of 4.5V to 28V, a wide output voltage range of 0.6V to 24V and a low output ripple voltage of 200mV. The device also features an output current of up to 250mA per string, and supports both PWM and PFM modes. Furthermore, the LDS88652-T2-250 has a built-in thermal protection circuit to protect the device and LED strings from thermal overloading.

In terms of design, the LDS88652-T2-250 is highly versatile and can meet the needs of a wide variety of applications. It is available in an 8-pin SOIC package and has a dimension of 12mm x 10mm. The device also features low power consumption with a power down current of 0.25uA and offers both constant voltage and constant current output. Furthermore, the LDS88652-T2-250 LED driver is capable of operating in a wide range of ambient temperatures, ranging from -40°C to 150°C.

Working Principle

The LDS88652-T2-250 is based on a single-stage buck-Boost converter topology,which uses integrated MOSFETs and a controller that synchronizes the operation of the two MOSFETs. It consists of two input voltage sources, one for the oscillator and the other for the main converter. The main converter works by controlling the duty cycle of the integrated MOSFETs (Q1 and Q2) to regulate the output voltage. This is done by controlling the on and off times of the integrated MOSFETs.

The oscillator controls the output of the main converter. The oscillator essentially acts as a clock signal for the main converter. When the oscillator voltage is low, the integrated MOSFETs are turned off and the current does not flow through the output. When the oscillator voltage is high, the integrated MOSFETs become on and the current flows through to the output. The duty cycle of the oscillator therefore directly affects the duty cycle of the integrated MOSFETs, and in turn the output voltage of the LDS88652-T2-250 LED driver.

Application Fields

The LDS88652-T2-250 LED driver is a versatile and efficient device that can be used in a variety of applications. It is well suited for use in lighting applications where the management of LED power is critical for the life and performance of the device. The device is also highly suitable for use in industrial and automotive lighting applications, specifically LED backlight applications. Additionally, the LDS88652-T2-250 LED driver is suitable for use in LED display and LED TV applications such as cell phones, tablets and photography equipment. Furthermore, the LDS88652-T2-250 can be used in DSLR and LCD camera flash operations and in energy harvesting applications.

Conclusion

The LDS88652-T2-250 LED driver from Toshiba is a highly efficient and versatile device with features specifically designed to meet the needs of a wide range of applications. It is based on a single-stage buck-boost converter topology and features an input voltage range of 4.5V to 28V, a wide output voltage range of 0.6V to 24V, a low output ripple voltage of 200mV and an output current of up to 250mA per string. The LDS88652-T2-250 LED driver is suited for use in lighting applications, particularly as a backlight in industrial and automotive applications, along with LED display and LED TV applications, energy harvesting and DSLR and LCD camera flash operations.

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