IRS21851SPBF

PMIC - Gate Drivers

IRS21851SPBF is a low-side gate driver from Intersil Corporation, designed for applications such as automotive battery protection, industrial lighting, and DC-to-DC conversion. It has a low quiescent current, high drive current and very high slew rate, making it an ideal choice for driving difficult loads.

The IRS21851SPBF boasts the following features: High voltage operation capabilities of up to 48V, high current capability of 6A, and low quiescent current of 1mA. It also offers a wide range of output frequencies, up to 150kHz, and high slew rate of up to 20V/us. This makes it well suited for applications such as tight loop control, power factor correction, and motor control. The Gate Driver also features low threshold voltage and tight timing tolerances. It is available in both SOP-8 and TSSOP-8 packages, providing a compact and highly integrated solution.

Application Field

The IRS21851SPBF is well suited for a variety of applications not limited to:

• Incandescent Lamp Control
• Motor Control
• Power Factor Correction for Low/Medium-Power Supplies
• Battery Protection
• DC-to-DC Conversion
• LED Lighting

Working Principle

The IRS21851SPBF utilizes a MOSFET as its output stage. The MOSFET is capable of providing high drive current up to 6A and high voltage up to 48V. The output stages are connected to the input latch, which is clocked by the oscillator circuit. As the latch is shifted, the output voltage changes according to the value of the input. The output voltage can be controlled from –5V to 48V.

The Gate Driver also features a high slew rate, which enables it to drive inductive loads quickly and accurately. In addition, the output frequency can be adjusted from 0 to 150kHz, to reduce current consumption. Lastly, the output voltage tolerance is tightly controlled, ensuring accurate output voltage at all times. This makes the IRS21851SPBF an ideal choice for applications where accuracy is critical.

Conclusion

The IRS21851SPBF is a low-side gate driver, designed for applications such as automotive battery protection, industrial lighting, and DC-to-DC conversion. It boasts a high voltage operation up to 48V, high current capability of 6A and low quiescent current of 1mA. In addition, it features a wide range of output frequencies and high slew rate, both of which make it well suited for tight loop control, power factor correction and motor control. Lastly, the output voltage tolerance is tightly controlled, ensuring accurate output voltage at all times.