STMicroelectronics L6598D013TR

Overview

L6598D013TR from STMicroelectronics is a high-voltage resonant controller IC designed for half-bridge LLC and series-resonant AC/DC power supplies. It integrates high-side and low-side gate drivers (450 mA sink / 250 mA source), a current-controlled oscillator (60–120 kHz soft-start, 58–62 kHz min freq), undervoltage lockout (10.7 V turn-on), and a rail-to-rail sense op amp - enabling closed-loop frequency modulation in 50–400 kHz switching applications.

For engineers reviewing the L6598D013TR datasheet, L6598D013TR pinout, L6598D013TR application, or L6598D013TR equivalent, key selection criteria include dV/dt immunity (±50 V/ns), integrated bootstrap diode, Zener-clamped Vs pin (15.6 V), deadtime control (0.27 µs typ.), and SO16N package compatibility with high-density PCB layouts.

Technical Context

The L6598D013TR implements a dual-driver architecture with independent high-side (HVG) and low-side (LVG) outputs, internally synchronized to enforce 0.27 µs minimum deadtime and prevent shoot-through. Its oscillator uses a programmable current source (I_fmin/I_fstart) fed by external R/C networks (R_fmin, R_fstart, C_f, C_SS) to shift frequency from 120 kHz down to 60 kHz during soft-start.

The integrated sense op amp (GBW = 1 MHz, V_io = ±10 mV) supports real-time current-mode protection or frequency tuning via direct connection to R_fmin. The bootstrap section replaces the external fast-recovery diode with a patented DMOS+diode structure (R_DS(on) = 150 Ω typ.), reducing BOM count while maintaining 600 V V_BOOT capability and ±50 V/ns dV/dt immunity across –40°C to +125°C.

Key Specifications

Pinout & Package

Package: SO16N (Small Outline, 16-pin, 3.9 mm body width, 1.27 mm pitch). RoHS-compliant, ECOPACK®2 rated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FAN7688 and UCC256301, the L6598D013TR uniquely combines 600 V HV capability, integrated bootstrap diode, and ±50 V/ns dV/dt immunity in a single SO16N package - making it the only option among the three qualified for universal-input (85–265 VAC) resonant adapters without external HV protection components.

Availability

L6598D013TR is available at Aetrix Electronics and suitable for server PSUs, industrial AC/DC modules, USB-C PD adapters, and LED drivers requiring stable component supply across multi-year production cycles.

Supply support for L6598D013TR 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 L6598 belongs to ST's high-voltage resonant controller product line, engineered specifically for LLC and series-resonant topologies in AC/DC adapters and industrial power supplies - emphasizing integration, ruggedness, and ease of EMI-compliant layout.

FAQ

What is the maximum allowable V_BOOT voltage for continuous operation?

The L6598D013TR supports a maximum continuous V_BOOT of 618 V, as specified in Table 1 (Absolute Maximum Ratings). This rating is validated across the full operating temperature range (–40°C to +125°C) and includes margin for transient spikes. Operation above this level risks permanent damage to the internal bootstrap DMOS structure and is not recommended under any condition.

Can the sense op amp be used for overvoltage protection instead of overcurrent?

Yes - the sense op amp's common-mode input range (–0.2 V to 3 V) and differential range (–5 V to +5 V) allow direct monitoring of auxiliary winding voltages or scaled bus voltages. When configured as a comparator with external resistive divider, it can trigger frequency foldback or EN1 shutdown for overvoltage events, provided the signal remains within its specified input voltage limits.

How does the integrated bootstrap diode affect PCB layout versus discrete solutions?

The integrated bootstrap diode eliminates the need for a high-voltage, fast-recovery discrete diode and its associated high-di/dt loop. This reduces parasitic inductance in the bootstrap path, minimizes ringing on the V_BOOT rail, and allows tighter placement of the bootstrap capacitor near pins 14–16 - directly improving EMI performance and ZVS consistency at frequencies above 200 kHz.

Is the L6598D013TR pin-compatible with earlier L6598 variants like L6598D?

Yes - the L6598D013TR is a tape-and-reel variant of the L6598D in SO16N package and shares identical pinout, electrical characteristics, and thermal behavior per DocID6554 Rev 8. The "013TR" suffix denotes packaging (13-inch reel); no functional or parametric differences exist between L6598D and L6598D013TR.