Yaohua KDY XXDXXXX-2W Service Manual

KDY series products are isolated wide voltage input stabilized output series, this kind of products have high efficiency, high accuracy, good stability performance, low output ripple, no need for external inductors, capacitors and other characteristics. It is suitable for battery power supply and long distance power supply circuits, especially for circuits with high voltage stability requirements and noise sensitive circuits.


Yaohua KDY XXDXXXX-2W Service Manual - cover page
Brand
yaohua
Category
Power Management
Document type
Service Manual
Language
Chinese
Pages
4
File format
PDF
File size
336 KB
Published
16 January, 2012
Updated
01 October, 2023
MD5 checksum
A535174975CB6CD3535AC6BA44A8FE2E

About this manual

The KDY series provides high efficiency, high precision, low output ripple and does not require external inductors or capacitors. It is suited for battery‑powered and long‑distance power‑supply circuits, especially where voltage stability and low noise are critical.

The manual includes load recommendations (30‑80 % of full load for optimal performance, with a minimum ~20 % load when idle), short‑circuit protection details, ripple mitigation advice, and warnings against parallel operation and reverse‑polarity connection. Installation and wiring guidelines are also provided. This manual is written in Chinese.

What's inside

  • General Characteristics
  • Model Specification Table
  • Technical Parameters
  • Installation Guidelines
  • Load Recommendations
  • Short‑Circuit Protection
  • Ripple and Filtering Advice
  • Parallel Use Warning
  • Polarity Protection

Specifications

Insulation Strength1000 VDC
Short‑Circuit ProtectionYes (self‑recovering)
Insulation Resistance1000 MΩ
Storage Humidity≤95 %
Operating Temperature-40 °C ~ 85 °C
Cooling MethodNatural Air Cooling
Switching Frequency130 kHz ±20 %
Maximum Temperature Rise30 °C
Voltage Regulation±0.5 %
Temperature Drift Coefficient0.02 %/°C
Load Regulation±0.5 %

Frequently asked questions

Does the module have short‑circuit protection?

Yes, the output stage includes self‑recovering short‑circuit protection.

Can multiple modules be paralleled for higher current?

Parallel operation is not recommended for this module.

How should reverse‑polarity protection be implemented?

A Schottky diode should be placed before the input to protect against reverse polarity.

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