IR2104 Half Bridge Driver IC DIP-8

IR2104 Half Bridge Driver IC DIP-8 is a powerful, high-voltage, high-speed power MOSFET and IGBT driver designed to implement efficient half-bridge topologies. This compact IC features independent high- and low-side referenced output channels. Therefore, it effortlessly drives two N-channel power switches in configurations commonly found in motor control and power conversion. The IR2104 incorporates a floating channel that expertly drives the high-side MOSFET/IGBT using a bootstrap technique, allowing simplified circuit design and reducing overall component count. Furthermore, its low quiescent current and robust operating characteristics make the IR2104 an ideal choice for high-frequency switching applications where space and efficiency are critical. Consequently, engineers rely on this driver for precise and safe control over medium- to high-power switching elements.

Key Features:

• Floating Channel Design: The device utilizes a high-side floating channel, enabling operation with voltages up to 600 V, perfect for line-powered applications.
• Bootstrap Operation: An integrated bootstrap diode simplifies the high-side power supply design, eliminating the need for an expensive, separate isolated power rail.
• Shoot-Through Prevention: The IR2104 incorporates a fixed 400 ns dead-time function, which expertly prevents simultaneous conduction (shoot-through) of the high and low-side MOSFETs, protecting the power stage.
• Logic Compatibility: Its input logic is fully compatible with standard CMOS and LSTTL outputs, facilitating direct interfacing with microcontrollers and digital signal processors.
• Undervoltage Lockout (UVLO): The driver includes UVLO circuitry on both the V_CC and V_BS supplies, ensuring the outputs remain low if the supply voltage is insufficient to drive the MOSFETs properly.

Technical Specifications:

• Maximum Offset Voltage (V_OFFSET): 600 V maximum
• Output Current Capability: 120 mA (Source) / 250 mA (Sink)
• V_CC Supply Range: 10 V to 20 V
• Fixed Dead Time (T_D): 400 ns (Typically)
• Logic Input Current (I_IN): ≈ 10 μA (Low power consumption)
• Propagation Delay: 600 ns (Turn-on) / 300 ns (Turn-off)
• Operating Junction Temperature: −40°C to +125°C

Mechanical Specifications:

• Package Type: DIP-8 (PDIP) Through-Hole
• Isolation: Non-isolated package (High-side circuit uses bootstrap)
• Lead Finish: Lead-free plating (typically SnAgCu)
• Moisture Sensitivity Level (MSL): MSL 1 (Unlimited floor life at ≤30°C/85% RH)

Dimensions:

• Body Length: ≈ 9.27 mm
• Body Width: ≈ 6.35 mm
• Row Spacing (Between rows): 7.62 mm (0.3 inch)
• Pin Pitch (Between pins): 2.54 mm (0.1 inch)
• Lead Length: ≈ 3.3 mm

Pinout and Wiring:

• Pin 1 (NC): No Connection (Leave unconnected).
• Pin 2 (HIN): Logic Input for the High-Side output (HO).
• Pin 3 (LIN): Logic Input for the Low-Side output (LO).
• Pin 4 (V_SS): Logic Supply Ground Reference.
• Pin 5 (V_CC): Low-Side and Logic Supply Voltage Input (10V to 20V).
• Pin 6 (LO): Low-Side Gate Drive Output (Connects to the gate of the low-side MOSFET).
• Pin 7 (V_B): High-Side Floating Supply Voltage (Bootstrap capacitor positive terminal).
• Pin 8 (H_O): High-Side Gate Drive Output (Connects to the gate of the high-side MOSFET).

Datasheet Reference:

• Download Infineon IR2104/IR2104S Datasheet

Commonly Used in:

• DC-DC and AC-DC Converters: Providing gate drive for the switching stage in various power supply circuits.
• Motor Control: Essential for driving half-bridge and full-bridge circuits used in brush DC and brushless DC (BLDC) motor control.
• Class D Audio Amplifiers: Forming the output stage driver for efficient high-power audio circuits.

Applications:

• Switching Power Supplies (SMPS): Drives the primary switches in various half-bridge topologies.
• Induction Heating Systems: Provides high-frequency gate control for resonant inverters.
• UPS and Inverter Circuits: Controls the high-voltage switches responsible for generating the AC output waveform.
• Lighting Ballasts: However, it also finds use in compact electronic ballast designs for fluorescent and high-intensity discharge (HID) lamps.

Equivalent Models:

• IRS2104: Infineon’s updated, often drop-in compatible, version of the IR2104, offering enhanced features.
• FAN7382: A comparable half-bridge gate driver IC from Fairchild (now Onsemi) that achieves similar functionality.
• L6384: STMicroelectronics offers this alternative half-bridge driver, which engineers often use as a functional replacement.

Package Includes:

• 1 x IR2104 Half Bridge Driver IC DIP-8