IR2103S SMD Half-Bridge MOSFET Driver IC SOIC-8 for Inverter and Motor Driver
The IR2103S is a half-bridge MOSFET and IGBT gate driver IC in an 8-pin SMD (SOIC-8) package. It drives two N-channel MOSFETs or IGBTs in a half-bridge: one low-side and one high-side switch whose floating supply can sit up to 600V above ground,...
Product details
The IR2103S is a half-bridge MOSFET and IGBT gate driver IC in an 8-pin SMD (SOIC-8) package. It drives two N-channel MOSFETs or IGBTs in a half-bridge: one low-side and one high-side switch whose floating supply can sit up to 600V above ground, powered by a simple bootstrap diode and capacitor. It is the surface-mount version of the IR2103, with the same pinout as the DIP-8 part. It is widely used in inverter, UPS, DC motor driver, H-bridge and SMPS boards. The logic inputs accept 3.3V, 5V or 15V signals, so it connects directly to an Arduino, ESP32, STM32 or PIC microcontroller, or to an SPWM chip. Key Features ⚡ 600V high-side floating channel – drives the top MOSFET of a half-bridge using bootstrap operation, no isolated supply needed. 🔧 10–20V gate drive supply – suits standard MOSFETs and IGBTs. ✅ 3.3V, 5V and 15V logic compatible – works straight from microcontroller pins. 🛡️ Built-in shoot-through protection – cross-conduction prevention logic and an internal dead time of about 520 ns stop both switches turning on together. 🔋 Undervoltage lockout – outputs switch off if VCC falls below about 8.2V, protecting MOSFETs from weak gate drive. 📏 SMD SOIC-8 package – small footprint for compact, machine-assembled boards. 🔁 dV/dt immune and tolerant to negative transients on the VS pin. IR2103S Specifications Part number IR2103S (SMD version of IR2103) Function Half-bridge MOSFET / IGBT gate driver Package SOIC-8 (SO-8), surface mount High-side offset voltage (VOFFSET) 600V max Gate drive supply (VCC, VBS) 10–20V VCC absolute maximum 25V Output current, source / sink 130 mA / 270 mA min (210 mA / 360 mA typ.) Logic input HIN in phase with HO, LIN inverted (out of phase with LO) Logic high / low threshold 3V min / 0.8V max Turn-on / turn-off delay 680 ns / 150 ns typ. Rise / fall time 100 ns / 50 ns typ. Internal dead time 520 ns typ. (400–650 ns) Undervoltage lockout (VCC) 8.9V on / 8.2V off typ. Power dissipation (SOIC-8) 0.625 W at 25 °C Operating ambient temperature -40 to +125 °C Body size 4.8–5.0 × 3.8–4.0 mm, 1.27 mm pin pitch IR2103S Pinout Pin Name Function 1 VCC Low-side and logic supply (10–20V) 2 HIN High-side logic input, in phase with HO 3 LIN (inverted) Low-side logic input, out of phase with LO 4 COM Ground / low-side return 5 LO Low-side gate drive output 6 VS High-side floating supply return (half-bridge midpoint) 7 HO High-side gate...
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