Infineon IR2136STRPBF 3-Phase Bridge Driver IC: Datasheet, Pinout, and Application Circuit Guide

The Infineon IR2136STRPBF is a high-voltage, high-speed power MOSFET and IGBT driver specifically designed for 3-phase bridge configurations. It is a robust and versatile integrated circuit capable of driving both high-side and low-side switches in applications ranging from motor drives to industrial inverters. Its built-in protection features and level-shifting circuitry make it a preferred choice for complex power conversion systems.

Key Features from the Datasheet

The IR2136STRPBF integrates six independent drivers: three for high-side and three for low-side switches. Its operational bootstrap capability allows it to drive all three high-side switches, simplifying the power supply design. Key specifications include:

High Voltage Operation: The chip can handle floating well voltages up to 600V, making it suitable for driving stages connected directly to high DC bus voltages.

Gate Drive Current: It delivers typical peak output currents of ±250mA, enabling fast switching of power devices and minimizing switching losses.

Integrated Protections: The IC includes advanced protection circuitry such as undervoltage lockout (UVLO) for all channels, overcurrent shutdown, and fault reporting. A programmable dead-time prevents shoot-through in the bridge legs.

Compatibility: It accepts logic-level inputs (3.3V/5V TTL/CMOS compatible) from a microcontroller, making it easy to interface with modern digital control systems.

Pinout Configuration

Understanding the pinout is crucial for PCB layout and system design. The IR2136STRPBF is available in a 28-pin SOIC package.

Input Pins (HIN1/2/3, LIN1/2/3): These logic inputs control the state of the corresponding high-side and low-side driver outputs.

Fault & Shutdown (ITRIP, FAULT, SD): The `ITRIP` pin is for overcurrent sensing input. `FAULT` is an open-drain output that goes low upon a fault condition. `SD` is used to immediately disable all outputs.

Bootstrap Pins (VB1/2/3, VS1/2/3): These pins are for the bootstrap capacitors and diodes required to generate the floating supply for the high-side drivers.

Driver Output Pins (HO1/2/3, LO1/2/3): These are the high-current gate drive outputs connected directly to the gates of the MOSFETs or IGBTs.

Power Supply Pins (VCC, VSS, COM): `VCC` is the low-side and logic supply voltage (typically 10-20V). `VSS` is the logic ground, and `COM` is the low-side return path for the lower drivers.

Typical Application Circuit Guide

A standard 3-phase inverter bridge circuit using the IR2136 is structured as follows:

1. Microcontroller Interface: The six PWM outputs from an MCU are connected to the HIN1/2/3 and LIN1/2/3 pins, often through a small series resistor for signal integrity.

2. Bootstrap Circuit: Each high-side driver requires a bootstrap circuit consisting of a fast-recovery diode and a capacitor connected between the `VBx` and `VSx` pins. This circuit provides the necessary voltage above the phase node (`VSx`) to fully enhance the high-side switch.

3. Gate Resistors: Each driver output (HO1/2/3, LO1/2/3) is connected to the gate of its respective power device through a gate resistor. This resistor controls the switching speed and dampens ringing.

4. Overcurrent Protection: The `ITRIP` pin is connected to a current sense resistor in the DC bus or in each phase leg via a small RC filter network. When the sensed voltage exceeds a threshold (typically ~0.5V), the IC shuts down all outputs and pulls the `FAULT` pin low to alert the MCU.

5. Decoupling: Proper decoupling is critical. A high-quality ceramic capacitor (e.g., 100nF) must be placed as close as possible between the `VCC` and `COM` pins, and a larger electrolytic capacitor (e.g., 47µF) should be used for bulk decoupling.

ICGOODFIND Summary

The Infineon IR2136STRPBF is an all-in-one solution for driving 3-phase power bridges, significantly reducing component count and design complexity. Its integrated 600V bootstrap functionality and comprehensive suite of protections make it an exceptionally reliable and efficient driver IC for demanding industrial and automotive applications. Proper attention to the bootstrap component selection and PCB layout is essential for achieving optimal performance.

Keywords:

1. 3-Phase Bridge Driver

2. Bootstrap Circuitry

3. High-Voltage Gate Driver

4. Integrated Protection

5. MOSFET/IGBT Driver