Key facts
- Brand
- Linear Technology
- Model
- LTC3805
- Category
- Power Management
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
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Linear Technology LTC3805 Flyback DC/DC Controller Application Note
This document details the design decisions made when creating a flyback DC/DC converter using the LTC3805 controller. It describes methods for altering the design for various applications, including isolated versions. The text covers power and start-up configurations, output voltage programming, and frequency selection.
Read onlineLinear Technology LTC3805 specifications
| Shutdown Current | 40µA |
|---|---|
| VCC Falling Threshold | 4V |
| RUN Pin Rising Threshold | 1.2V |
| Synchronization Lock-on Time | two cycles |
| Synchronization Recovery Time | two cycles |
Source: Linear Technology LTC3805 Flyback DC/DC Controller Application Note
All Linear Technology LTC3805 documents by type
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
How is the soft-start rate programmed?
The rate of change of VOUT at start-up is programmed by the capacitor on the SSFLT pin.
From: Linear Technology LTC3805 Flyback DC/DC Controller Application Note
How is overcurrent protection set?
The overcurrent protection level is set by a resistor in series with the OC pin using a constant 10µA current sourced by the OC pin.
From: Linear Technology LTC3805 Flyback DC/DC Controller Application Note
What output voltage and current does the example circuit produce?
The design generates -3.3V at 3A from a negative input rail.
From: Linear Technology LTC3805 Negative Buck Converter Design Note 1022
At what load current does the converter enter short-circuit protection?
The converter enters this state when the output current reaches 5.0A.
From: Linear Technology LTC3805 Negative Buck Converter Design Note 1022