Infineon Technologies 1EDN8511BXUSA1

Overview

1EDN8511BXUSA1 from Infineon Technologies is a single-channel low-side gate driver IC designed to drive normal-level and superjunction MOSFETs (e.g., CoolMOS™) and GaN HEMTs in high-efficiency power stages. It delivers 4 A source / 8 A sink peak output current, features 19 ns typical propagation delay with ±6/∓4 ns accuracy, and incorporates 8.0 V / 7.0 V UVLO thresholds - enabling robust operation in industrial SMPS and EV off-board chargers.

For engineers reviewing the 1EDN8511BXUSA1 datasheet, 1EDN8511BXUSA1 pinout, 1EDN8511BXUSA1 application, or 1EDN8511BXUSA1 equivalent, key selection criteria include its separated source/sink outputs, -10 V input voltage robustness, 5 A reverse current tolerance, rail-to-rail drive capability, and compatibility with logic-level controllers in half-bridge configurations requiring fast, shoot-through-protected switching.

Technical Context

The 1EDN8511BXUSA1 implements a complementary MOS rail-to-rail output stage with discrete p-channel (source) and n-channel (sink) drivers, enabling asymmetric turn-off (faster) vs. turn-on timing critical for half-bridge "brake-before-make" operation. Its dual-input architecture (IN+, IN−) uses internal pull-down/pull-up biasing to ensure defined low-output state during power-up or floating inputs.

UVLO is set at 8.0 V (ON) / 7.0 V (OFF), protecting downstream MOSFETs from linear-mode conduction under undervoltage conditions. Input hysteresis is fixed at 1.1 V independent of supply voltage, and all inputs tolerate −10 V to prevent ground-shift-induced cross-currents in noisy power systems.

Key Specifications

Pinout & Package

1EDN8511BXUSA1 is packaged in PG-SOT23-6-2 (lead count: 6), a standard surface-mount package with exposed pad not present. Pin functions are validated per Infineon's official datasheet Rev. 2.3 (2022-01-21).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side gate driver applications.

Compared with 1EDN7511B and UCC27536DR, the 1EDN8511BXUSA1 uniquely combines 8 V UVLO, separated source/sink outputs, and integrated shoot-through protection - making it optimal for high-reliability industrial and automotive-grade half-bridge designs where gate timing integrity and fault resilience are non-negotiable.

Availability

1EDN8511BXUSA1 is available at Aetrix Electronics and suitable for industrial SMPS, EV off-board chargers, and solar micro-inverters requiring stable component supply across extended temperature ranges (−40 °C to +125 °C) and long production lifecycles.

Supply support for 1EDN8511BXUSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, sensor, and automotive ICs, with global R&D and manufacturing infrastructure.

The EiceDRIVER™ 1EDN family targets high-efficiency, high-reliability power conversion systems - specifically engineered for fast-switching, shoot-through-critical topologies like totem-pole PFC, LLC resonant converters, and GaN-based inverters.

FAQ

What is the function of the separated OUT_SRC and OUT_SNK pins on 1EDN8511BXUSA1?

The separated OUT_SRC (pin 2) and OUT_SNK (pin 3) provide independent high-side and low-side gate drive paths within a single low-side driver IC. This architecture enables hardware-enforced "brake-before-make" timing - ensuring the MOSFET gate is fully discharged before recharging - eliminating shoot-through risk without relying on controller-level dead-time programming or external logic.

Does 1EDN8511BXUSA1 require external bootstrap components for low-side operation?

No. As a dedicated low-side gate driver, 1EDN8511BXUSA1 operates with a single ground-referenced supply (VDD to GND) and does not require bootstrap diodes, capacitors, or high-side floating supplies. Its rail-to-rail output stage directly drives the MOSFET gate between VDD and GND, simplifying PCB layout and reducing BOM count in low-side switch configurations.

How does the −10 V input voltage rating improve system reliability?

The −10 V rating on IN+ and IN− pins allows the driver to withstand large ground potential differences between the controller and power stage - common in high-dV/dt environments like motor drives or multi-layer PCBs with split ground planes. This prevents false triggering, latch-up, or ESD structure damage during transient ground shifts, enhancing functional safety in industrial and automotive applications.

Can 1EDN8511BXUSA1 drive GaN HEMTs effectively despite being specified for MOSFETs?

Yes. Its 4 A source / 8 A sink capability, 19 ns propagation delay, and low output impedance (<0.85 Ω source / <0.35 Ω sink) are explicitly validated for GaN HEMTs in Infineon's application notes. The fast turn-off (enabled by 8 A sink) critically controls GaN's low Qg and high dV/dt, preventing dynamic Rds(on) rise and oscillation during hard switching at frequencies up to 1 MHz.