Discussion Overview
The discussion revolves around the characteristics of power supplies, specifically comparing variable and constant power supplies, and their implications for devices like CCTV cameras. Participants explore the effects of no-load voltage, voltage sag under load, and the potential risks of using different types of adapters.
Discussion Character
- Technical explanation
- Debate/contested
- Conceptual clarification
Main Points Raised
- One participant questions the terminology for power adapters that exhibit higher no-load voltage compared to those that maintain a constant voltage, seeking clarity on the implications for device compatibility.
- Another participant points out that the datasheet indicates a voltage tolerance of +/-3%, suggesting it applies across the load range, but raises concerns about the absence of no-load voltage data for the Meanwell adapter.
- There is a discussion about the significance of no-load voltage, with some participants arguing that it can overstress components and affect reliability, while others question its relevance.
- Participants note that ordinary adapters can experience significant voltage sag (up to 45%) at no load, while branded adapters like Meanwell exhibit much lower sag (around 3%).
- One participant inquires about the internal components of adapters that contribute to different sag characteristics, suggesting that power control and feedback mechanisms play a role.
- There is a debate about whether regulated power supplies can be used interchangeably with devices designed for ordinary adapters, with some asserting that devices have specific voltage input specifications that must be adhered to.
- A later reply suggests that using a regulated power supply should not damage devices, as they typically operate within a specified voltage range.
- Participants express skepticism about marketing claims related to power supplies, emphasizing the importance of reading datasheets thoroughly.
Areas of Agreement / Disagreement
Participants express differing views on the implications of using variable versus constant power supplies, the significance of no-load voltage, and the compatibility of regulated power supplies with various devices. The discussion remains unresolved regarding the specific characteristics of the Meanwell adapter in question.
Contextual Notes
There are limitations regarding the availability of specific input voltage specifications for devices, and the discussion highlights the complexity of power supply design without reaching a consensus on the implications of using different types of adapters.