Renesas PS9505L3-AX

Overview

PS9505L3-AX from Renesas Electronics is a surface-mount, gull-wing lead-bent photovoltaic IGBT gate driver optocoupler with 2.5 A peak output current, ±25 kV/μs common-mode transient immunity, and 0.25 μs max propagation delay. It isolates high-voltage IGBT gate control in industrial inverters and induction heating systems while providing UVLO protection with hysteresis.

For engineers reviewing the PS9505L3-AX datasheet, PS9505L3-AX pinout, PS9505L3-AX application, or PS9505L3-AX equivalent, key selection criteria include its 8 mm creepage distance, Pb-free gull-wing DIP package, 30 V max supply voltage, and guaranteed 2.0 A min output current under 10 μs pulse conditions.

Technical Context

The PS9505L3-AX integrates a GaAlAs LED input stage with a monolithic photo-diode, signal processor, and power output transistor on a single chip. Its dual-transistor output stage enables complementary high- and low-side drive capability with independent VO pins (pins 6 and 7) referenced to VEE (pin 5) and supplied by VCC (pin 8).

UVLO circuitry monitors VCC–VEE with 12.3 V turn-on threshold and 1.3 V hysteresis, preventing IGBT misfiring during undervoltage conditions. The internal shield (exposed metal pad) enhances noise immunity, supporting stable operation in high-dv/dt motor drive environments up to 110°C ambient.

Key Specifications

Pinout & Package

PS9505L3-AX uses an 8-pin gull-wing surface-mount DIP package (9.25 × 6.5 mm body, 11.8 mm overall length with bent leads), optimized for long creepage and automated assembly. Lead bending conforms to JEDEC MO-150AA.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLP350 and FOD3180, PS9505L3-AX uniquely balances 25 kV/μs immunity, 0.25 μs speed, 8 mm creepage, and integrated UVLO-making it optimal for space-constrained, safety-critical industrial inverters requiring full IEC 61800-5-1 compliance.

Availability

PS9505L3-AX is available at Aetrix Electronics and suitable for industrial inverter motor control, induction heating systems, solar PV string inverters, and uninterruptible power supplies requiring stable component supply across multi-year production cycles.

Supply support for PS9505L3-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 leader specializing in microcontrollers, analog, power, and mixed-signal solutions for industrial, automotive, and infrastructure markets.

The PS9505L3-AX belongs to Renesas' high-CMR photovoltaic gate driver family, engineered specifically for robust IGBT/MOSFET drive in noisy, high-voltage industrial power conversion systems.

FAQ

What is the maximum allowable forward current for the PS9505L3-AX LED input?

The PS9505L3-AX supports 25 mA absolute maximum forward current (IF), but recommended operating conditions specify 7–16 mA for reliable switching. Exceeding 16 mA continuously risks accelerated LED degradation; pulsed operation up to 1.0 A is permitted only for <1 μs width at ≤0.2% duty cycle. Always verify IF with series resistor selection based on VF = 1.56 V typical at 10 mA.

Does the PS9505L3-AX require external components for stable operation?

Yes - a minimum 0.1 μF bypass capacitor must be placed between VCC and VEE within 10 mm of the PS9505L3-AX package. This stabilizes the output-stage supply during high di/dt gate switching. Additionally, input-side series resistance must be selected to limit IF to 7–16 mA, and PCB layout must separate high-voltage IGBT collector/emitter traces from the LED input side to prevent capacitive coupling-induced false triggering.

How does the UVLO function protect the IGBT when using PS9505L3-AX?

The PS9505L3-AX UVLO circuit disables both output transistors when VCC–VEE falls below 11.0 V (turn-off threshold) and re-enables them only above 12.3 V (turn-on threshold), providing 1.3 V hysteresis. This prevents partial gate turn-on that could cause IGBT thermal runaway during brownout or startup. The UVLO response time is 0.8 μs turn-on and 0.6 μs turn-off, ensuring rapid fault containment.

Can pins 1 and 4 of the PS9505L3-AX be used as grounding points or signal returns?

No - pins 1 and 4 are explicitly designated NC (No Connection) in the PS9505L3-AX datasheet. They must remain unconnected or be tied to the LED-side ground plane only. Using them as signal paths, bypass nodes, or mechanical anchors degrades internal noise immunity and may compromise isolation integrity. The exposed shield pad (bottom thermal pad) serves as the sole internal reference for noise suppression.

What reflow profile is certified for PS9505L3-AX gull-wing mounting?

The PS9505L3-AX is qualified for infrared reflow with peak package surface temperature ≤260°C for ≤10 seconds, time above 220°C ≤60 seconds, and preheat (120–180°C) duration of 120±30 seconds. Up to three reflow cycles are allowed. Rosin flux with ≤0.2 wt% chlorine is required; freon- or chlorine-based cleaning solvents must be avoided post-soldering to prevent corrosion.