newrudeman

Laptop using L6563H and L6699, 19V-90W adapter with PFC

STEVAL-ISA138V1

Overview

The STEVAL-ISA138V1 solution evaluation board is a 90 W, wide-range mains, power-factor corrected, AC-DC adapter. Its electrical specifications are tailored to a typical hi-end portable computer power adapter.

The architecture is based on a two-stage approach: a front-end PFC pre-regulator based on the L6563H TM PFC controller and a downstream LLC resonant half bridge converter using the new L6699 resonant controller. Thanks to the chipset used, the main features of this design are very high overall efficiency, compliance with ENERGY STAR® eligibility criteria (EPA rev. 2.0 EPS), high efficiency even at light load, and compliance with the new ErP Lot 6 Tier2 requirements. No load input power consumption is very low also, well within the international regulation limits.
The controller of the LLC stage is the L6699, integrating innovative functions such as self-adjusting adaptive dead-time, anti-capacitive mode protection and proprietary "safe-start" procedure to prevent hard switching at startup.

Main features

Universal input mains range: from 90 to 264 Vac - frequency from 45 to 65 Hz
Output voltage: 19 V at 4.75 A continuous operation
Mains harmonics: meets EN61000-3-2 Class-D and JEITA-MITI Class-D
No load mains consumption: in accordance with ENERGY STAR 2.0 for external power supplies
Average efficiency: in accordance with ENERGY STAR 2.0 for external power supplies
Light load efficiency: in accordance with ErP Lot 6 Tier2 requirements

EMI: within EN55022-Class-B limits
Safety: meets EN60950 standards
Dimensions: 65 x 151 mm, 25 mm maximum component height
PCB: double-side, 70 µm, FR-4, mixed PTH/SMT
RoHS compliant

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-05-08 15:24:40

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