The USB Power Delivery Testing Problem You Don't Know You Have

When designing USB Type-C products, chargers, or power delivery systems, you face an increasingly complex challenge: verifying that your devices actually deliver what they promise. The USB Power Delivery specification has evolved rapidly with Extended Power Range (EPR) supporting up to 240W at 48V, multiple voltage profiles, and advanced protocols like Adjustable Voltage Supply (AVS) and Programmable Power Supply (PPS).​

But here's the real problem: Most engineers rely on budget USB testers that only measure basic voltage and current at the standard 5V level. These tools cannot trigger the various PD profiles, cannot test modern EPR implementations, and cannot properly validate charger compliance under realistic load conditions. This creates a dangerous gap—you might ship a product that claims USB PD support but fails to deliver power correctly under real-world charging scenarios.​​

The Gaps in DIY Testing

Consumer-grade USB testers and basic load resistors have significant limitations:​

• No profile negotiation – They can't trigger or validate different voltage levels (9V, 15V, 20V, 28V, 36V, 48V)

• Limited load simulation – Real devices demand dynamic; variable loads that simple resistors cannot provide

• No compliance verification – They provide data readings but no structured compliance testing

• Safety blind spots – They won't catch the design flaws that lead to catastrophic failures under load

The result? Non-compliant chargers flooding the market. Faulty power banks with overrated capacities. USB cables that violate safety standards. And your products at risk of failing in the field or worse—creating safety hazards.​

The Professional Solution

The PassMark USB Power Delivery Tester PRO is purpose-built to solve this problem comprehensively. It's not just another USB tester—it's an engineering validation tool that integrates naturally into your development workflow.​

What makes it different:

Test Comprehensive Power Delivery Standards – Full support for USB PD 2.0, 3.0, and 3.1 (including EPR up to 240W), Quick Charge 4+, Thunderbolt 3/4, and proprietary protocols like Apple and Samsung fast charging.​

Validate True Device Compliance – Negotiates voltage profiles with host PD controllers, applies real-world loads up to 240W continuously, and measures ripple, voltage stability, and current under stress.​

Emulate Real Charging Scenarios – Configure custom charger profiles (5V to 20V, up to 100W) to test how your devices respond to different power sources.​

Measure Actual Device Performance – Determine real battery capacities in mAh, test power bank output claims under load, and assess true charging speeds under various conditions.​

Stress Test for Safety – Create dynamic step loads to verify chargers react safely to sudden demand changes, catching design flaws before products reach consumers.​

Diagnose Cable Quality – Test USB Type-C cables for voltage drops, verify E-Marker compliance, and ensure power rating correctness.​

Why This Matters

USB PD compliance isn't optional—it's critical for product safety and market acceptance. A 2023 compliance study found that nearly 10% of all USB-C product failures were PD-related, with common issues being voltage instability, inadequate power delivery under load, and safety mechanism failures. The PassMark tester catches these issues before they become expensive field recalls or worse.​

Designed for Professional Use

The PassMark USB Power Delivery Tester PRO is engineered for design engineers, quality assurance teams, and embedded systems developers who need to validate products properly. It integrates into your testing workflow cleanly, provides comprehensive compliance reporting, and helps you confidently ship products that meet both specifications and real-world demands.​

To Know More:

Visit PassMark USB Power Delivery Tester PRO to explore detailed specifications, user guides, and technical documentation.