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What Is the IR2104? Half-Bridge Driver with Dead-Time and Uses

November 1, 2026 5 min read
Quick answer

The IR2104 is a half-bridge gate driver with internal dead-time. With a single input (IN) and a shutdown (SD) pin it produces complementary drive for the top and bottom MOSFET; it is used in synchronous bucks and motor drives. Its difference from the IR2110: a single input + internal dead-time (reducing shoot-through risk). It still needs bootstrap.

The IR2104 is a half-bridge gate driver with internal dead-time. With a single input (IN) and a shutdown (SD) pin it produces complementary (dead-time) drive for the top and bottom MOSFET. For the concept, see what is a gate driver.

What is the IR2104 used for?

Safely driving two MOSFETs in half-bridges, synchronous bucks and motor drives. Its difference from the IR2110: a single input + internal dead-time (reducing shoot-through risk) and easy enable/shutdown.

Key pins (functional — PDIP-8)

  • IN: logic input.
  • SD: shutdown/enable.
  • VCC / COM: gate-drive supply / reference.
  • HO / LO: top / bottom gate output.
  • VB / VS: high-side bootstrap / reference.

For exact pin numbers see the datasheet.

Watch out

It still needs bootstrap (VB-VS capacitor + diode). Internal dead-time is this driver's advantage, but still mind layout and gate resistors at high di/dt.

Equivalents

  • IR2110: independent HIN/LIN, no dead-time.
  • IR2101 / IR2103: close half-bridge drivers.
  • L6384: an alternative half-bridge driver.

Find it in our catalog

Use the IR2104 search.

Frequently Asked Questions

What is the IR2104?+
The IR2104 is a half-bridge gate driver with internal dead-time. With a single input (IN) and a shutdown (SD) pin it produces complementary drive for the top and bottom MOSFET; it is used in synchronous bucks and motor drives.
What is the difference between the IR2104 and the IR2110?+
The IR2104 offers a single input + internal dead-time (reducing shoot-through risk); the IR2110 has independent HIN/LIN but does not generate internal dead-time. Both need bootstrap.
How much dead-time does the IR2104 provide?+
The IR2104 produces a fixed internal dead-time (the value given in the datasheet); this prevents the top and bottom switches from overlapping (shoot-through).
What is an equivalent to the IR2104?+
The independent-input IR2110; the close IR2101/IR2103; the alternative L6384.
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