The electronic circuit breaker is designed for retrofitting to direct current (DC) power supplies. Thanks to the use of high-performance STP60NO5 Power MOSFETs, the voltage drop is minimal even at high currents.
This feature provides a significant advantage in sensitive circuits and applications requiring high currents.
Furthermore, load reduction and adjustable trigger sensitivity prevent interruptions during sudden load surges.
Electronic Electronic Fuse General Information
Contents
An electronic Electronic Fuse has two main functions:
Power supply protection: It protects power sources (mains adapters, batteries, solar panels, etc.) against overcurrent situations.
Load protection: The electronic circuit breaker also protects the connected load by safely disconnecting it from situations such as overcurrent and short circuits.
The two most important parameters determining the performance of an electronic circuit breaker are:
Triggering current (threshold current): Determines at what value the current will be interrupted.
Response time (trip delay): Defines how long it takes for the circuit to be interrupted after an overcurrent is detected.
While it may seem advantageous for the circuit breaker to react as quickly as possible at first glance, this is not always true. Many electronic loads can generate short-term and permissible current peaks.
Also, small current pulses caused by switching should be considered within the scope of normal operation.
Electronic Electronic Fuse Diagram
An overly sensitive and fast-reacting fuse can mistake these transient current surges for faults, unnecessarily interrupting normal operation and leading to system instability.
On the other hand, a very slow-reacting fuse may fail to disconnect the load in time in the event of a real fault, causing irreversible damage.
Therefore, the maximum allowable current value and response time (delay) must be carefully selected according to the application-specific conditions.
Table 1 provides various values that can be used for different circuit limitations and the resulting current limiting characteristics. These alternatives can be easily adapted to the circuit if needed.
Diodes D5 and D6 are safety elements designed to protect the input of the operational amplifier and protect the integrated circuit from damage in case of overvoltage or reverse polarity.
The R7 resistor sets the zero reference point of the TLC271. This setting allows the circuit to accurately and stably detect and process even small currents of 0.5 A.
| C3 | TIME |
|---|---|
| 10nF | 200uS |
| 100nF | 2mS |
| 1uF | 20mS |
| 10uF | 200mS |
Electronic Fuse Technical Specifications and Application Areas
Designed for use in DC power systems operating from 10V to 42V.
Features an adjustable current range of 0.5A – 10A.
Offers a tripping delay that can be changed between 200 µs and 200 ms.
Thanks to these features, it can be used as a flexible and reliable retrofit protection solution in both sensitive electronic circuits and systems requiring higher currents.
Source: de.elv.com/p/elektronische-sicherung-05-10-a-P202853/
