ISL97636IRZ

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ISL97636IRZ is a voltage-mode and frequency-mode LED driver chip offered by Intersil Corporation. This chip integrates a proprietary Pulse Amplifier (PA) and a charge pump, enabling it to effectively drive 6 strings of up to 24 LEDs per string. It is especially suited for applications where dynamic control of current flow and brightness are required.

The ISL97636IRZ is designed for lighting applications, such as LCD backlighting, automotive lighting, and general illumination. This device is compatible with the 1- and 2-wire serial communications protocol and supports dimming control, allowing users to control the light output from their LEDs. The chip also offers built-in EMI protection, enabling it to meet the EMC requirements of today’s most demanding applications.

The ISL97636IRZ, as a PMIC-LED driver chip, consists of two parts: the LED Driver and the LED Transformer. The LED Driver provides the regulated current for each LED string. The current regulation is realized via a feedback loop in which the control signal is being sent back to the LED Driver. On the other hand, the LED Transformer is used in order to match the LEDs’ impedance to the external circuitry. This transformer also allows for current balancing amongst the individual LED strings.

Furthermore, the ISL97636IRZ has a built-in Linear Feedback Control (LFC) which helps to reduce power consumption and improve the efficiency of the device. This LFC uses feedback from the LEDs to adjust the voltage or the frequency of the output signal, thereby optimizing the output power. These features can also be configured over the 1- and 2-wire serial communications protocol.

The ISL97636IRZ can work in both voltage and frequency modes. In the voltage mode, the output current is maintained at a constant voltage level. This makes the device ideal for applications where a constant light output is required. In the frequency mode, the chip provides an output AC waveform in order to provide more efficient power delivery of the LEDs. This mode is beneficial in applications where dimming control is required.

In conclusion, the ISL97636IRZ is an optimal choice for PMIC-LED Driver applications which require dynamic control of current flow and brightness. The device offers integrated control features, along with efficient power delivery and EMI protection to meet the most demanding requirements. The ability to operate in both voltage and frequency modes ensures that the ISL97636IRZ is the ideal choice for a wide range of applications.

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