Infineon IR2184STRPBF High- and Low-Side Driver IC: Features and Application Circuits
The Infineon IR2184STRPBF is a high-performance, high-voltage power MOSFET and IGBT driver specifically engineered to control both high-side and low-side switches in bridge configurations. As a pivotal component in modern power electronics, it simplifies design and enhances reliability in applications ranging from motor drives to switch-mode power supplies.
Key Features of the IR2184STRPBF
This driver IC integrates numerous advanced features that make it a preferred choice for engineers. It boasts a floating channel designed for bootstrap operation, enabling efficient driving of high-side N-channel power MOSFETs or IGBTs. The device can withstand voltages up to 600 volts, making it suitable for robust industrial environments.
A critical feature is its built-in dead-time control (DTC). This logic input prevents shoot-through currents by ensuring that the high-side and low-side outputs are never active simultaneously, a common failure mode in bridge circuits that can be catastrophic. Furthermore, the IC offers exceptional immunity to negative voltage transients on the VS pin, thanks to its advanced HVIC and latch-proof CMOS technologies.
The matched propagation delays between the two channels ensure precise switching, which is crucial for maintaining efficiency and reducing distortion in output waveforms. The 3.3V, 5V, and 15V logic compatible inputs provide seamless interfacing with microcontrollers, DSPs, and other low-voltage control circuitry without requiring additional level-shifting components.
Application Circuits
The primary application for the IR2184STRPBF is in half-bridge and full-bridge power stages. A typical half-bridge circuit, fundamental to motor drives and inverters, is shown below.
In this setup:
1. The HIN and LIN pins receive complementary PWM signals from a microcontroller.
2. A bootstrap circuit, consisting of diode (Dbs) and capacitor (Cbs), is used to generate a floating supply voltage (VB) for the high-side driver section. This is a simple and cost-effective method for providing the necessary voltage above the bridge's switch-node (VS).
3. The IC's internal dead-time logic processes the input signals, inserting a fixed delay to prevent shoot-through.
4. The HO and LO outputs then drive the gates of the high-side and low-side MOSFETs/IGBTs with high peak current (typically ~1.4A source/1.8A sink), ensuring fast switching transitions to minimize power loss.
This architecture is easily scalable to a three-phase inverter by using three IR2184STRPBF drivers (one for each phase leg). The driver is also extensively used in applications like:
Uninterruptible Power Supplies (UPS)
AC and Brushless DC (BLDC) Motor Drives
Switching Amplifiers
The Infineon IR2184STRPBF stands out as a robust and highly integrated solution for driving bridge circuits. Its combination of high-voltage capability, built-in protective features like dead-time control, and logic compatibility makes it an indispensable component for designing efficient, reliable, and compact power conversion systems. It successfully reduces component count and design complexity while improving overall system performance.
Keywords:
1. Half-Bridge Driver
2. Bootstrap Operation
3. Dead-Time Control
4. High-Voltage IC
5. MOSFET/IGBT Driver
