STMicroelectronics L6498LTR

Overview

L6498LTR 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 output drive capability at 25 °C. 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 L6498LTR datasheet, L6498LTR pinout, L6498LTR application, or L6498LTR 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, and SO-8 package compatibility with compact PCB layout requirements.

Technical Context

The L6498LTR implements a floating high-side driver architecture using BCD6 "OFF-LINE" process, supporting DC rail up to 500 V and transient peaks to 600 V. Its interlocking function prevents simultaneous high-side and low-side output activation, eliminating shoot-through risk in half-bridge topologies.

UVLO thresholds are independently set at 8.7 V (turn-on) and 8.2 V (turn-off) for VCC, and 8.6 V / 7.5 V for VBO (BOOT–OUT), ensuring safe operation under brown-out conditions. The integrated bootstrap diode (R_DS(on) = 175 Ω typ.) replaces external fast-recovery diodes while maintaining <120 µA steady-state HVG supply current.

Key Specifications

Pinout & Package

Available in RoHS-compliant SO-8 package (ECOPACK®), with 1.27 mm pitch, 4.9 mm × 6.0 mm body size, and thermal resistance R_th(JA) = 185 °C/W. Compact footprint supports dense power stage layouts and simplified thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR2104STRPBF and UCC27211D, the L6498LTR uniquely combines 600 V transient rating, integrated bootstrap diode, and dual UVLO in SO-8 - making it optimal for industrial 400–600 V bus applications where reliability and BOM reduction are critical.

Availability

L6498LTR is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, and induction heating systems requiring stable component supply and long-term production continuity.

Supply support for L6498LTR 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, specializing in power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.

The L6498LTR belongs to ST's high-voltage gate driver product line, engineered specifically for robust half-bridge control in 400–600 V industrial power conversion systems with emphasis on noise immunity, integration, and thermal resilience.

FAQ

What is the maximum allowable switching frequency for the L6498LTR?

The L6498LTR supports up to 800 kHz maximum switching frequency when driving a 1 nF capacitive load, as specified in the recommended operating conditions. This limit assumes proper PCB layout, adequate bootstrap capacitor sizing (e.g., ≥100 nF for 30 nC gate charge), and thermal derating per SO-8 R_th(JA) = 185 °C/W. Real-world operation typically remains ≤200 kHz in motor drives and UPS due to thermal and layout constraints.

Does the L6498LTR require an external bootstrap diode?

No - the L6498LTR integrates a bootstrap diode with 175 Ω typical on-resistance, eliminating the need for an external high-voltage fast-recovery diode. This reduces BOM count, PCB area, and leakage-related voltage droop. An external diode is only recommended if C_BOOT charging time is insufficient or if V_BOOT drop exceeds design margin (e.g., >0.6 V under sustained high-duty cycles).

How does the interlocking function prevent shoot-through?

The interlocking logic hardware-enforces that HVG and LVG outputs cannot both be high simultaneously: when one input (HIN or LIN) goes high, the opposite output is forced low before the active output rises. This creates guaranteed dead time, verified in the truth table and characterized with ≤30 ns matching error between HS/LS turn-on/off delays - preventing cross-conduction in half-bridge power stages.

Can the L6498LTR drive IGBTs with gate-emitter threshold voltages above 5 V?

Yes - the L6498LTR delivers 2 A source current at 25 °C, enabling fast charging of IGBT gates requiring high V_GE(th). Its 2.5 A sink current ensures rapid turn-off even for IGBTs with high Miller capacitance. The 3.3 V/5 V logic inputs interface directly to controllers, while the 8.6 V V_BO UVLO threshold ensures sufficient gate drive voltage (>10 V) is maintained for reliable IGBT saturation under all operating conditions.