Renesas PS9402-E3-AX

Overview

PS9402-E3-AX from Renesas Electronics is a 16-pin SSOP photovoltaic gate driver IC designed for high-CMR IGBT and power MOSFET switching in industrial inverters and UPS systems. It delivers 2.5 A peak output current, 200 ns max propagation delay, 25 kV/μs common-mode transient immunity, and integrates desaturation detection and active Miller clamping.

For engineers reviewing the PS9402-E3-AX datasheet, PS9402-E3-AX pinout, PS9402-E3-AX application, or PS9402-E3-AX equivalent, this page provides verified functional specifications, validated pin assignments, confirmed safety certifications (UL, CSA, VDE Option), and real-world design context for high-reliability motor drive and power conversion circuits.

Technical Context

The PS9402-E3-AX implements an optically isolated architecture with GaAlAs LED input and monolithic photo-diode + signal processing + power transistor output stage. Its dual-supply output stage (VCC2/VEE) supports ±15 V negative rail operation and enables direct high-side gate driving with integrated UVLO hysteresis (11.3–12.3 V trip range).

Desaturation sensing operates via Pin 14 with 6.9 V typical threshold and 250–500 ns fault-to-output delay; Miller clamping activates at 2.0 V on Pin 12 to suppress parasitic turn-on. The device uses internal blanking capacitor charge/discharge control (−0.24 mA / 30 mA) to reject false DESAT triggers during switching transitions.

Key Specifications

Pinout & Package

The PS9402-E3-AX is housed in a 16-pin Shrink Small Outline Package (SSOP) with 0.64 mm pitch, 10.36 mm × 7.49 mm body, and 8 mm creepage distance. Lead bending is gull-wing for surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar IGBT gate driver applications.

Compared with ACPL-332J-500E and SI8261AD-D-IS, the PS9402-E3-AX offers unique integration of DESAT detection, Miller clamping, and UVLO hysteresis in a single optical package-enabling compact, self-protecting gate drive solutions for legacy IGBT-based industrial systems without redesigning fault-handling logic.

Availability

PS9402-E3-AX is available at Aetrix Electronics and suitable for industrial inverters, uninterruptible power supplies, and solar photovoltaic systems requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for PS9402-E3-AX 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

Renesas Electronics is a global semiconductor manufacturer specializing in microcontrollers, analog, and power devices for automotive, industrial, and infrastructure markets.

The PS9402-E3-AX belongs to Renesas' high-isolation gate driver product line, engineered specifically for robust IGBT and power MOSFET control in harsh electrical environments with fast transient immunity and integrated protection features.

FAQ

What is the maximum recommended forward current for the PS9402-E3-AX LED input?

The PS9402-E3-AX specifies a recommended forward current (IF(ON)) of 8–12 mA under normal operation. Absolute maximum forward current is 25 mA, but continuous operation above 12 mA reduces LED lifetime and increases thermal stress. At TA ≥ 85°C, derating applies: 0.52 mA/°C reduction from 12 mA baseline. Always use series current-limiting resistors calibrated to VCC1 and VF (1.2–1.8 V typ).

How does the PS9402-E3-AX implement desaturation detection?

The PS9402-E3-AX implements desaturation detection via Pin 14 (Desat), which monitors the IGBT collector-emitter voltage through an external resistor divider. When VDESAT exceeds 6.0–7.5 V (typical 6.9 V), the internal comparator triggers a fault state within 250–500 ns, pulling Pin 3 (FAULT) low. A blanking capacitor connected to Pin 14 provides 5 μs muting during turn-on to avoid false trips caused by tail current.

Can the PS9402-E3-AX drive both N-channel and P-channel IGBTs?

The PS9402-E3-AX is optimized for N-channel IGBTs and power MOSFETs. Its output stage is configured as a low-side sink/high-side source driver (VO pin), supporting only unidirectional gate drive with active Miller clamping. It does not provide complementary push-pull output or built-in level-shifting for P-channel devices. For P-channel IGBTs, external level-shifting circuitry and separate bias supplies would be required-making it unsuitable without significant redesign.

What safety certifications apply to the PS9402-E3-AX?

The PS9402-E3-AX holds UL certification (E72422), CSA certification (CA 101391), and optional DIN EN60747-5-2 (VDE 0884 Part 2) approval (No. 40024069). These cover reinforced insulation, 5000 Vrms isolation, 8 mm creepage, and partial discharge performance up to 2119 Vpeak. The "-V" suffix denotes VDE-compliant variants; PS9402-E3-AX is UL/CSA certified and compatible with VDE designs when used per its rated isolation parameters.

What is the purpose of the Vclamp pin (Pin 12) on the PS9402-E3-AX?

The Vclamp pin (Pin 12) on the PS9402-E3-AX enables active Miller clamping: when the VO output voltage rises above 2.0 V during IGBT turn-off, the internal clamp transistor activates and sinks current from the gate to VEE, holding the gate voltage near 2.0 V. This prevents parasitic turn-on caused by high dv/dt across the Miller capacitance-critical for reliability in high-speed, high-voltage IGBT applications like motor drives and UPS systems.