ISL2101AABZ-T

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC – Gate Drivers are integrated circuits (ICs) which generate the pulses needed for a MOSFET to turn on or off. This technology is rapidly becoming the preferred choice for power supply design for two main reasons – firstly, it helps to minimize switching losses and ensure high efficiency, and secondly, it is able to offer greatly improved surge power capabilities and fault protection. The ISL2101AABZ-T is a fixed-frequency, controller and driver circuit which can be used to actively manage power switching in a range of applications. In this article, we take a look at its application field and working principle.

One of the major applications that ISL2101AABZ-T can be used for is medium and high power factor (PF) offline flyback converters. These converters need a robust, programmable and cost-effective controller, which can allow the integration of features like minimum on-time, burst mode over-voltage protection, and frequency jittering. The ISL2101AABZ-T, with its power-good signal, error amplifier with adjustable minimum off-time, and programmable line over-voltage protection feature, suits these applications admirably.

The ISL2101AABZ-T controller does not require frequency synchronization and can be operated using a wide range of frequencies (50kHz-350kHz). Furthermore, it is designed to work seamlessly with a variety of MOSFETs, such as N- and P-channel HEXFETs, IBCs and intelligent power devices. This flexibility provides designers with great freedom when designing their system architecture. In addition, the ISL2101AABZ-T offers excellent power efficiency – up to 94% efficiency under typical load conditions.

The ISL2101AABZ-T also allows designers to easily implement features like over-voltage protection, open-loop current-mode control, and EMI reduction. This makes it suitable for a wide range of power supply applications, such as personal electronics, telecommunication, and industrial automation equipment. Moreover, its high integration and compatibility with different MOSFETs, as well as its thermal protection capability, make it an ideal solution for demanding applications where efficiency, size and cost are key design considerations.

In terms of manufacturability, the ISL2101AABZ-T is designed for wet solder flow conditions and passes IPC-A-600G Visual Standard. It also conforms to JEDEC Standard 5-2 Mullite, as well as IPC-1752/D Profile Standard. This means that it is reliable and ready for mass production.

The ISL2101AABZ-T controller is designed to work in a fixed operating frequency range, with a wide range of operating frequencies (50kHz-350kHz). It operates in two modes – burst and continuous. In burst mode, the MOSFET is switched off in the time interval when the voltage of the output filter exceeds the reference value. In continuous mode, the sawtooth signal generated at the oscillator of the circuit is applied to an internal error amplifier, thereby controlling the switching frequency.

In order to ensure fast transient response, the ISL2101AABZ-T has a dedicated voltage-mode controller. This is coupled with a programmable minimum on-time of 0.2μs, which helps to ensure a very fast turn-on and turn-off of the MOSFET. Moreover, the controller features an integrated PWM comparator with an accuracy of ±2% and an adjustable error amplifier, which accurately adjusts the switching frequency with an accuracy of ±20%.

The ISL2101AABZ-T comes with integrated safety features, such as automatic restart after fault detection, under-voltage lockout, and thermal shutdown. Moreover, this robust controller circuit is compliant with the recent energy-related regulations, such as the CoC Tier-2 requirements.

In conclusion, the ISL2101AABZ-T is a sophisticated and powerful controller and driver circuit, which offers great flexibility for developers of medium to high power factor offline flyback converters. It is easy to use, reliable and highly efficient, making it an ideal choice for designers of power supplies for a range of applications.

The specific data is subject to PDF, and the above content is for reference