The L6598 is a high voltage resonant controller with features such as high voltage rail, dV/dt immunity, high driver current capability, and fast switching times. It is suitable for AC/DC adapters and resonant topology applications.
The L6598 is a high‑voltage resonant controller designed for AC/DC adapters and other applications requiring up to 600 V rail voltage. It integrates a soft‑start function, bootstrap diode, and sense op‑amp for closed‑loop control, providing driver source currents of 250 mA and sink currents of 450 mA.
The document details the pin configuration, thermal data, absolute maximum ratings, recommended operating conditions, and electrical characteristics such as supply voltage range (10‑600 V), dv/dt immunity (+50 V/ns), and a maximum switching frequency of 400 kHz. Block diagrams and timing diagrams illustrate the internal architecture and operation of the high/low side drivers and oscillator.
| High Voltage Rail | up to 600 V |
|---|---|
| dv/dt Immunity | +50 V/ns |
| Driver Current Capability | 250 mA source, 450 mA sink |
| Maximum Switching Frequency | 400 kHz |
| Supply Voltage Range | 10 V to 600 V |
The device is specified for a supply voltage between 10 V and 600 V.
It offers a dv/dt immunity of +50 V/ns.
The controller can source 250 mA and sink 450 mA.
The maximum switching frequency is 400 kHz.