IR21591

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The IR21591 is a synchronous, multiport, fixed frequency, non-isolated switch mode power supply (SMPS) ballast controller. The device integrates a high-performance, fixed frequency, PWM controller and an array of power MOSFET switches to provide a variety of control and protection functions for a variety of lighting applications. The IR21591 can be used to provide a constant output current or voltage depending on external components. The IR21591 is designed to provide a highly efficient and low cost solution with a minimum number of external components.

The IR21591 is a dedicated, self-oscillating SMPS controller designed for lighting applications such as fluorescent lighting, incandescent lighting, HID lighting and LED lighting. The device is capable of operating over a wide range of input voltages, from 6 V to 60 V. The IR21591 not only offers high voltage hold up capability, but also offers programmable frequency, adjustable current limit and over temperature protection (OTP) functionality. The IR21591 is also capable of providing high-frequency fault protection and suppressing current inrush by monitoring the voltage and current at the output.

The IR21591 integrates an array of power MOSFET switches, which enable a variable frequency operation with a good efficiency over a wide range of input voltage and load conditions. The device also integrates a slew rate control (SRC) circuit and a number of control logic circuits to accurately control the current and voltage at the output. The SRC circuit controls the switching frequency and switching times of the power MOSFETs for better efficiency and reduced EMI. The IR21591 also incorporates a variety of protection features to ensure safe operation. These features include under voltage lockout (UVLO), programmable overload protection (OLP) and over temperature protection (OTP). The device also offers a programmable frequency in the range from 500 kHz to 2 MHz, adjustable current limit and programmable dead time.

The IR21591 is ideal for a wide range of lighting applications such as fluorescent lighting, incandescent lighting, HID lighting and LED lighting. The device offers a low component count, high efficiency and a wide operating voltage range making it suitable for the most demanding applications. The device also offers a wide range of protection features such as UVLO, OLP and OTP making it an ideal choice for lighting applications.

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