Toshiba Semiconductor and Storage TK14V65W,LQ

Overview

TK14V65W from Toshiba Electronic Devices & Storage Corporation is a silicon N-channel super-junction MOSFET designed for high-voltage switching in offline power supplies. It features 650 V V_DSS, 0.25 Ω R_DS(ON) (typ.), 13.7 A I_D (DC), and DFN8x8 surface-mount package with integrated heatsink drain. It is optimized for PFC and main-switch stages in AC-DC adapters and industrial SMPS.

For engineers reviewing the TK14V65W datasheet, TK14V65W pinout, TK14V65W application, or TK14V65W equivalent, key selection criteria include avalanche ruggedness (E_AS = 179 mJ), gate threshold voltage range (2.5–3.5 V), channel-to-case thermal resistance (0.9 °C/W), and diode reverse recovery performance (t_rr = 240 ns, Q_rr = 2.8 µC).

Technical Context

This device implements Toshiba's DTMOS™ IV super-junction architecture to achieve low conduction loss while maintaining fast switching and robust dv/dt immunity (≥50 V/ns). Its dual-source configuration (Source1 for gate return, Source2 for main current path) enables precise control of gate loop inductance and minimizes shoot-through risk in half-bridge topologies.

The TK14V65W integrates an intrinsic body diode with characterized reverse recovery parameters-critical for ZVS operation in LLC resonant converters-and supports hard-switched applications up to 400 V bus voltage with guaranteed single-pulse avalanche capability at 3.7 A.

Key Specifications

Pinout & Package

TK14V65W uses the DFN8x8 (TOSHIBA 2-8T1A) thermally enhanced surface-mount package with exposed drain pad for heatsinking. The package weighs 0.175 g and features 0.5 mm pitch terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage MOSFET applications.

Compared with STP14N65M2 and IXTH12N65X2, the TK14V65W delivers superior power density via its DFN8x8 package and lowest R_DS(ON), enabling smaller magnetics and reduced PCB area-critical for space-constrained telecom and EV auxiliary systems.

Availability

TK14V65W is available at Aetrix Electronics and suitable for server power supplies, industrial AC-DC adapters, telecom rectifiers, and EV charger auxiliary power designs requiring stable component supply and long-term manufacturability.

Supply support for TK14V65W 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 storage solutions, with decades of expertise in high-voltage MOSFET technology.

The TK14V65W belongs to Toshiba's DTMOS™ IV super-junction MOSFET product line, engineered specifically for high-efficiency, high-reliability offline power conversion in industrial and infrastructure applications.

FAQ

What is the maximum continuous drain current for TK14V65W at T_c = 100 °C?

The TK14V65W supports 13.7 A DC drain current at case temperature T_c = 25 °C. At T_c = 100 °C, derating applies per the PD–T_c curve (Fig. 8.15); the practical continuous current drops to approximately 8.2 A to maintain T_ch ≤ 150 °C. This value assumes optimal PCB copper area and thermal vias beneath the drain pad. Always verify with actual thermal simulation for your layout before finalizing the TK14V65W design.

Does TK14V65W have a built-in body diode, and what are its reverse recovery characteristics?

Yes, the TK14V65W includes an integrated body diode with characterized reverse recovery behavior: t_rr = 240 ns (typ.), Q_rr = 2.8 µC (typ.), and I_rr = 24 A (typ.) under specified test conditions (IDR = 6.9 A, dI_DR/dt = 100 A/µs). These values are measured with V_DD = 400 V and are essential for designing snubbers and predicting EMI in flyback and LLC converters using the TK14V65W.

How should the dual-source pins (2, 3, 4) of TK14V65W be routed on the PCB?

Pin 2 (Source1) must be used exclusively as the gate driver return path and routed with minimal length and inductance to the gate driver IC ground. Pins 3 and 4 (Source2) carry the main switching current and must connect directly to the power ground plane with multiple thermal vias. Never tie Source1 and Source2 together on the PCB-this defeats the noise isolation benefit and risks gate oscillation. Proper separation is critical for stable operation of the TK14V65W in high-frequency SMPS.

Is TK14V65W suitable for avalanche operation, and what is its rated single-pulse energy?

Yes, the TK14V65W is fully rated for single-pulse avalanche operation with E_AS = 179 mJ (typ.) at T_ch = 25 °C, tested under V_DD = 90 V, L = 23.2 mH, R_G = 25 Ω, and I_AR = 3.7 A. This rating ensures robustness during inductive turn-off transients in non-resonant topologies. Repeated avalanche operation is not recommended; always design to avoid sustained avalanche stress in the TK14V65W.

What is the gate threshold voltage range for TK14V65W, and how does it affect drive requirements?

The TK14V65W has a gate threshold voltage V_th of 2.5–3.5 V (measured at V_DS = 10 V, I_D = 0.69 mA), confirming enhancement-mode operation. This range ensures reliable turn-on with standard 5 V logic-level drivers while preventing accidental conduction from noise. For full enhancement and minimal R_DS(ON), a V_GS ≥ 10 V is required-verified by the R_DS(ON) = 0.25 Ω (typ.) spec at V_GS = 10 V, I_D = 6.9 A. This makes the TK14V65W compatible with common isolated gate drivers.