Key facts
- Brand
- Fairchild
- Model
- SG6858
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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Applying SG6858 to Control a Flyback Power Supply Application Note
The document describes a detailed design strategy for a high-efficiency, compact flyback converter utilizing the SG6858 controller. Key features include Green-mode PWM to reduce standby power, low start-up and operating currents, leading-edge blanking, constant output power limit, and universal input support.
Read onlineFairchild SG6858 specifications
| Start-up current | 10uA |
|---|---|
| Operating current | 2.5mA |
| Gate output voltage clamp | 17V |
Source: Applying SG6858 to Control a Flyback Power Supply Application Note
All Fairchild SG6858 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
How does the SG6858 handle light-load conditions?
It uses a proprietary green mode that provides off-time modulation to linearly decrease the switching frequency.
From: Applying SG6858 to Control a Flyback Power Supply Application Note
What is the maximum gate output voltage clamped to?
The SG6858's output driver clamps the gate output voltage at 17V.
From: Applying SG6858 to Control a Flyback Power Supply Application Note
What is the maximum startup current of the SG6858?
The maximum startup current is 10uA.
From: Fairchild SG6858 Low-Cost Green-Mode PWM Controller Datasheet
What is the maximum duty cycle?
The maximum duty cycle ranges from 70% to 80%.
From: Fairchild SG6858 Low-Cost Green-Mode PWM Controller Datasheet