Renesas PS9331L2-AX

Overview

PS9331L2-AX from Renesas Electronics is a 6-pin SDIP surface-mount photocopler optimized for IGBT and power MOSFET gate driving in high-noise industrial inverters and servo systems. It delivers 2.5 A peak output current, achieves 175 ns max propagation delay, and sustains ±50 kV/μs common-mode transient immunity at 125 °C ambient operation.

For engineers reviewing the PS9331L2-AX datasheet, PS9331L2-AX pinout, PS9331L2-AX application, or PS9331L2-AX equivalent, key selection criteria include creepage distance (8 mm min), UVLO thresholds (10.8–13.4 V), and isolation voltage (5,000 V_r.m.s.).

Technical Context

The PS9331L2-AX integrates a GaAlAs LED input stage with a monolithic output stage comprising photo-diode, signal processing circuitry, and dual power MOSFETs - enabling single-chip isolated gate drive without external level-shifting or driver transistors. Its architecture supports direct connection to IGBT gates with integrated under-voltage lockout (UVLO) and high-speed switching.

Designed for long creepage (8 mm min) and high CMR, the device uses shielded 6-pin SDIP packaging with gull-wing leads and internal shielding to suppress capacitive coupling between input and output sides. It operates across −40 °C to +125 °C with 30 V max supply range (V_CC−V_EE) and requires no external bootstrap components.

Key Specifications

Pinout & Package

PS9331L2-AX uses a 6-pin Shrink Dual In-line Package (SDIP) with gull-wing surface-mount leads and internal shielding. Package dimensions: 11.5 ±0.3 mm × 6.8 ±0.25 mm × 4.58 ±0.3 mm (L×W×H), 8 mm minimum outer creepage distance, and 0.4 mm minimum isolation distance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLP350 and FOD3180, PS9331L2-AX uniquely combines 8 mm creepage, integrated UVLO with 1.3 V hysteresis, and 175 ns max propagation delay - making it optimal for space-constrained, safety-critical industrial inverters requiring minimal external components.

Availability

PS9331L2-AX is available at Aetrix Electronics and suitable for industrial inverter, AC servo, and motor control applications requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for PS9331L2-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 PS9331L2-AX belongs to Renesas' high-CMR photocopler product line, engineered specifically for robust isolated gate driving in noisy power conversion systems - emphasizing speed, safety certification, and thermal resilience.

FAQ

What is the maximum recommended forward current for the PS9331L2-AX LED input?

The PS9331L2-AX has an absolute maximum forward current (I_F) of 25 mA, but its recommended operating condition specifies 8–12 mA. Operating at 10 mA provides optimal CTR stability and lifetime reliability while ensuring full logic transition at the output stage. Exceeding 12 mA continuously may accelerate LED degradation and reduce isolation barrier longevity.

Does the PS9331L2-AX require an external bypass capacitor, and if so, what value is specified?

Yes, the PS9331L2-AX requires a ≥1.0 μF bypass capacitor between V_CC and V_EE, placed within 10 mm of the device pins. This capacitor stabilizes the output supply rail during high di/dt gate switching events and suppresses voltage droop that could trigger unintended UVLO activation. Ceramic or low-ESR tantalum types are recommended to maintain impedance below 100 mΩ at 10 MHz.

Can Pin 2 (NC) on the PS9331L2-AX be used as a ground connection or signal return?

No - Pin 2 is explicitly designated as NC (No Connection) and must remain unconnected or tied only to the input-side GND (VEE on LED side). Using it as a signal return, bypass path, or mechanical anchor degrades internal noise immunity and may compromise common-mode rejection. The datasheet strictly prohibits routing any signal through Pin 2, even if electrically floating.

What is the purpose of the UVLO function in the PS9331L2-AX, and how does it behave during power-up?

UVLO in the PS9331L2-AX prevents gate turn-on until V_CC reaches a safe threshold (10.8–13.4 V), avoiding weak or partial IGBT conduction. During power-up, the output remains low until V_CC crosses V_UVLO+; hysteresis (0.4–1.3 V) ensures clean release without oscillation. If V_CC drops below V_UVLO− during operation, the output forces gate discharge to protect the IGBT from shoot-through.

How does the PS9331L2-AX achieve ±50 kV/μs common-mode transient immunity?

The PS9331L2-AX achieves ±50 kV/μs CMR through monolithic integration of input and output circuits on a single die with internal shielding, minimized interconnect capacitance (<30 pF input capacitance), and symmetrical layout design. Its 6-pin SDIP package includes a metal shield layer between input and output leads, and the 0.4 mm minimum isolation distance is maintained by mold compound with CTI ≥175 - collectively suppressing capacitive coupling during fast dV/dt events.