ISL97635AIRZ-T

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ISL97635AIRZ-T is an LED driver in the Power Management IC (PMIC) family. It is a LED driver, used for driving LED lighting components for illumination, display backlight, automotive lighting and other applications. This IC offers two separate outputs that are capable of driving up to two series of LEDs with a constant current of 500mA or 1000mA, enabling successful light production. It has a high level of integration and is available in a low profile, Surface Mount Technology (SMT) package, reducing supply times and manufacturing costs.

ISL97635AIRZ-T features an integrated current sensing reference, allowing the user to accurately monitor the output current. The current feedback is by using a resistor (Rsense) placed in series with the LEDs. When the sensed current exceeds the set amount, the output current is turned off. This allows the chip to have a high degree of protection against current overshoot and provide a consistent output current.

The PMIC is delivered in a low profile, SMT package. Its size enables faster manufacturing processes, reduce supply times, and keep costs down. The IC offers a wide input voltage operating range of 6V to 42V, as well as a wide operating temperature range of -20°C to 85°C. In addition, the ISL97635AIRZ-T is RoHS compliant and supports lead-free soldering.

The ISL97635AIRZ-T also features a programmable over-voltage protection (OVP) and over-temperature protection (OTP). The OVP prevents device damage when a voltage exceeding a preset threshold is applied to the input. The OTP shuts down the device in the event of an excessive temperature is detected, protecting the device against irreversible damage.

The working principle of the ISL97635AIRZ-T LED driver is based on a switching frequency of 400kHz. The LED current is digitally regulated by a Pulse Width Modulation (PWM) system. The IC utilizes an external resistor (R_CAL) to sense the output current, with different internal registers as references. When the sense voltage exceeds the set level, the output current is shut down. The output current can be adjusted through the R_CAL resistor connected to the ISEN pin. The VFB pin can be used to monitor the output voltage.

The ISL97635AIRZ-T is suitable for a variety of applications, including color control, illumination and display backlighting. It is used in automotive lighting applications, such as license plate lamps, tail lamps and daytime running lights, as well as general lighting applications. The chip is also used in automotive interior lighting systems, gaming consoles, home theater systems and mobile devices.

In conclusion, the ISL97635AIRZ-T LED driver is a highly integrated Power Management IC. It offers two independent outputs and an integrated current sensing reference, capable of driving up to two series of LEDs with a constant current of 500mA or 1000mA. The chip is delivered in a low profile, SMT package, with a wide input voltage operating range of 6V to 42V, as well as a wide operating temperature range of -20°C to 85°C. It also supports over-voltage protection (OVP) and over-temperature protection (OTP). This chip is suitable for a variety of applications, including automotive and general lighting, gaming consoles, home theaters, and mobile devices.

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