Toshiba Semiconductor and Storage TLP5751(LF4,E

Overview

TLP5751(LF4,E) from Toshiba Electronic Devices & Storage Corporation is a high-speed, rail-to-rail output photocoupler with integrated photodetector and infrared LED in a 6-pin SO6L package. It delivers ±1.0 A peak output current, 150 ns max propagation delay, ±35 kV/µs common-mode transient immunity, and 5000 Vrms isolation voltage-designed for driving IGBTs and MOSFETs in industrial inverters and induction cooktops.

For engineers reviewing the TLP5751(LF4,E) datasheet, TLP5751(LF4,E) pinout, TLP5751(LF4,E) application, or TLP5751(LF4,E) equivalent, key selection criteria include reinforced insulation compliance (EN IEC 60747-5-5, UL 1577), totem-pole logic output architecture, 15–30 V supply range, -40°C to +110°C operating temperature, and internal Faraday shield for noise-immune gate driving in high-dV/dt environments.

Technical Context

The TLP5751(LF4,E) integrates an infrared LED emitter and a high-gain, high-speed photodetector with a totem-pole (buffer logic) output stage, enabling rail-to-rail switching between VCC and GND. Its internal Faraday shield ensures ±35 kV/µs common-mode transient immunity-critical for reliable operation in noisy inverter power stages.

It operates with a threshold input current ≤4 mA and supports 15–30 V supply voltage, delivering fast switching (tpLH/tpHL ≤150 ns) and robust output drive (±1.0 A peak) without external pull-up/pull-down components. The device requires a 1 µF bypass capacitor between pins 6 (VCC) and 4 (GND) for stable high-gain amplifier operation.

Key Specifications

Pinout & Package

Package: 6-pin SO6L (Toshiba package code 11-4N101A), surface-mount, lead-forming option LF4 (wide forming), 2.3 mm max height, 8.0 mm min creepage/clearance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed photocoupler gate driver applications.

Compared with TLP5751(LF4,E), the TLP5752(LF4,E) offers dual-channel integration at the cost of functional redundancy for single-channel use, while the ACPL-332J-000E trades certified CMTI and compactness for raw current capability-making TLP5751(LF4,E) optimal for space-constrained, noise-intensive inverter gate drive where safety-certified isolation is mandatory.

Availability

TLP5751(LF4,E) is available at Aetrix Electronics and suitable for induction cooktop control, industrial motor inverter gate driving, and air conditioner inverter systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for TLP5751(LF4,E) 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

Toshiba Electronic Devices & Storage Corporation is a Japanese semiconductor manufacturer specializing in power devices, logic ICs, and optoelectronics with over 50 years of reliability engineering heritage.

The TLP575x series was developed specifically for high-noise, high-reliability gate driving in industrial and home appliance inverters-emphasizing certified reinforced insulation, rail-to-rail output, and industry-leading CMTI performance.

FAQ

What is the maximum operating temperature for the TLP5751(LF4,E)?

The TLP5751(LF4,E) has a specified operating temperature range of -40°C to +110°C. This rating applies to the junction temperature under continuous operation and is validated per Toshiba's absolute maximum ratings and recommended operating conditions. The device maintains its ±1.0 A output current and ±35 kV/µs CMTI performance across this full range, making it suitable for sealed, thermally demanding environments like induction cooktop control boards and HVAC inverter modules. Thermal derating is not required within these limits.

Does the TLP5751(LF4,E) require an external bypass capacitor?

Yes, the TLP5751(LF4,E) requires a 1 µF ceramic bypass capacitor connected between pin 6 (VCC) and pin 4 (GND). This is explicitly mandated in Toshiba's datasheet (Section 6 and Section 9 Notes) to stabilize the internal high-gain linear amplifier and prevent improper switching behavior. The capacitor must be placed within 1 cm of the pins to maintain high-frequency decoupling effectiveness-omitting it risks erratic output transitions and reduced noise immunity in real-world inverter applications.

What safety certifications does the TLP5751(LF4,E) hold?

The TLP5751(LF4,E) is UL-recognized (UL 1577, File No. E67349), cUL-recognized (CSA Component Acceptance Service No. 5A, File No. E67349), VDE-approved for EN IEC 60747-5-5 and EN IEC 62368-1, and CQC-approved for GB4943.1. These certifications confirm compliance with reinforced insulation requirements for end-equipment safety standards. Note that VDE approval requires ordering the D4 option variant (e.g., TLP5751(D4-LF4,E)); the base TLP5751(LF4,E) meets UL/cUL/CQC but not VDE unless specified.

Can the TLP5751(LF4,E) drive both IGBTs and MOSFETs?

Yes, the TLP5751(LF4,E) is explicitly qualified for both IGBT and MOSFET gate driving, as confirmed in its official Applications list and Electrical Characteristics table. Its ±1.0 A peak output current, rail-to-rail VO swing (0 V to VCC), and 15–30 V supply range enable direct connection to standard gate terminals without external buffers. Toshiba specifies performance down to 15 V VCC, supporting logic-level MOSFETs, and up to 30 V, accommodating high-threshold IGBTs used in industrial inverters and induction heating systems.

What is the purpose of Pin 2 (N.C.) on the TLP5751(LF4,E)?

Pin 2 on the TLP5751(LF4,E) is designated N.C. (No Connection) and must remain unconnected on the PCB. It is electrically isolated from all internal circuitry and serves only as a mechanical placeholder in the SO6L package mold. Connecting Pin 2 to any net-including ground, VCC, or signal lines-violates Toshiba's absolute maximum ratings and may compromise isolation integrity, CMTI performance, or long-term reliability. The datasheet explicitly states "N.C." in Section 5 (Pin Assignment) and warns against routing or soldering to this terminal.