Key facts
- Brand
- Fairchild
- Model
- SG6741
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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FAIRCHILD AN-6741 Flyback Power Supply Control with the SG6741 handbook
The document details the design strategy for a high-efficiency, compact flyback converter utilizing the SG6741 series of PWM controllers. Key features include high-voltage startup, low operating current of 4mA, and a proprietary green mode that linearly decreases the switching frequency to 22KHz at light-load conditions to meet power conservation requirements. The controller also incorporates frequency hopping to reduce EMI and peak-current-mode control with synchronized slope compensation.
Read onlineFairchild SG6741 specifications
| Operating Current | 4mA |
|---|---|
| Minimum PWM Frequency | 22KHz |
| Gate Output Maximum Voltage Clamp | 18V |
| Over-Voltage Protection Threshold | 26V |
| Turn-on Threshold Voltage | 16.5V |
| Turn-off Threshold Voltage | 10.5V |
| Feedback Pin Termination Voltage | 1.2V |
| Leading Edge Blanking Time | 350ns |
Source: FAIRCHILD AN-6741 Flyback Power Supply Control with the SG6741 handbook
All Fairchild SG6741 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the operating current of the SG6741?
The SG6741 is manufactured using BiCMOS process, which allows an operating current of only 4mA.
From: FAIRCHILD AN-6741 Flyback Power Supply Control with the SG6741 handbook
How does the SG6741 reduce EMI emission?
The SG6741 integrates an internal frequency hopping function to reduce the EMI emission of a power supply with minimal line filtering.
From: FAIRCHILD AN-6741 Flyback Power Supply Control with the SG6741 handbook
What is the operating current of the SG6741?
The device features a low operating current of only 4mA.
Does the SG6741 include protection against open-loop failures?
Yes, it provides an internal open-loop protection circuit to ensure safety during such failures.