STMicroelectronics L6498DTR

Overview

L6498DTR from STMicroelectronics is a high-voltage half-bridge gate driver IC for N-channel MOSFETs and IGBTs, featuring 600 V transient withstand voltage, ±50 V/ns dV/dt immunity, and 2 A source / 2.5 A sink peak output current. It integrates bootstrap diode, interlocking logic, and independent UVLO on both high-side and low-side sections, enabling robust motor control in industrial inverters and UPS systems.

For engineers reviewing the L6498DTR datasheet, L6498DTR pinout, L6498DTR application, or L6498DTR equivalent, key selection criteria include propagation delay (85 ns), rise/fall time (25 ns with 1 nF load), TTL/CMOS-compatible 3.3 V/5 V inputs with hysteresis, SO-8 package thermal resistance (185 °C/W), and dual UVLO thresholds (VCC: 8.7 V ON / 8.2 V OFF; VBO: 8.6 V ON / 8.0 V OFF).

Technical Context

The L6498DTR implements a BCD6 "OFF-LINE" process-based half-bridge driver with floating high-side section rated for DC rail up to 480 V and transient peaks to 600 V. Its interlocking function prevents simultaneous high-side and low-side output activation, eliminating shoot-through risk in bridge topologies.

It supports bootstrap operation via integrated 175 Ω R_DS(on) diode structure, eliminating external fast-recovery diodes. Logic inputs accept 3.3 V or 5 V TTL/CMOS signals with defined hysteresis (0.6 V typ.), and UVLO circuits independently monitor VCC (low-side supply) and VBO = VBOOT − VOUT (high-side floating supply).

Key Specifications

Pinout & Package

Package: SO-8, surface-mount, ECOPACK® compliant, 185 °C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage half-bridge gate driver applications.

Compared with IR2110STRPBF and UCC27211D, the L6498DTR uniquely combines integrated bootstrap diode, 3.3 V logic compatibility, and sub-100 ns propagation delay in an SO-8 footprint-optimizing for compact, cost-sensitive industrial motor and power supply designs requiring robustness over raw speed.

Availability

L6498DTR is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies (UPS), and induction heating systems requiring stable component supply across multi-year production cycles.

Supply support for L6498DTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The L6498 belongs to ST's high-voltage gate driver product line, engineered specifically for robust, compact half-bridge control in off-line power conversion and motor drive applications up to 600 V.

FAQ

What is the maximum allowable switching frequency for L6498DTR?

The L6498DTR supports up to 800 kHz maximum switching frequency when driving a 1 nF capacitive load, as specified in the Recommended Operating Conditions table. This limit arises from combined propagation delay (85 ns), rise/fall times (25 ns each), and minimum dead-time requirements to avoid shoot-through. At higher frequencies, thermal dissipation in the SO-8 package (185 °C/W R_thJA) and bootstrap capacitor recharge time become limiting factors.

Can L6498DTR drive silicon carbide (SiC) MOSFETs?

Yes, the L6498DTR can drive SiC MOSFETs provided gate voltage requirements (typically 15–20 V) and gate charge fall within its 2 A source / 2.5 A sink capability and 480 V DC output rating. However, its 175 Ω integrated bootstrap diode R_DS(on) may cause excessive voltage drop during high-frequency SiC gate charging; external bootstrap diode or dedicated SiC driver may be preferred for >200 kHz operation.

How does the interlocking function prevent shoot-through?

The interlocking function is implemented in hardware: when either HIN or LIN is high, the opposite output is forced low regardless of the other input state. This ensures HVG and LVG cannot both be high simultaneously-even during transient input glitches or mismatched signal edges-eliminating cross-conduction risk in half-bridge configurations without requiring external logic or dead-time insertion.

Is the L6498DTR pin-compatible with L6498D?

Yes, L6498DTR and L6498D share identical SO-8 pinout, electrical specifications, and functional behavior; the only difference is packaging-DTR is tape-and-reel, D is tube. Both use the same die and meet identical production data specs per DocID030318 Rev 3, making them fully interchangeable in PCB layout and firmware design.