BCP56-QF this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including BCP56-QF price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for BCP56-QF to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.
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Application Scenario: Overcurrent Protection Circuit
A practical application for the BCP56-QF is in an overcurrent protection circuit for a DC power supply, where it can be used to protect the load from excessive currents.
Circuit Connection:
1. Sensing Resistor (Rs): Place a low-value sensing resistor (Rs) in series with the load to convert the load current into a voltage drop across Rs.
2. Voltage Divider Network (R1 and R2): Connect resistors R1 and R2 in a voltage divider configuration across Rs. The junction of R1 and R2 is connected to the base (B) of the BCP56-QF.
3. Transistor Configuration: Connect the emitter (E) of the BCP56-QF directly to the ground. The collector (C) of the BCP56-QF is connected to the control terminal of a power switch (e.g., a relay or a MOSFET) that controls the power supply to the load.
4. Diode for Feedback (D1): With its anode connected to ground and its cathode linked to the intersection of R1 and R2, place a diode (D1) in parallel with the sensing resistor Rs. In the event that the transistor shuts off, D1 offers a channel for any stored charge in the BCP56-QF base to release.
Design Considerations:
- Sensitivity to Overcurrent: The values of R1, R2, and Rs should be chosen such that the base-emitter voltage (Vbe) of the BCP56-QF reaches the threshold for turning on the transistor when the current through Rs exceeds the desired limit.
- Speed of Response: The BCP56-QF's fast switching capability ensures a quick response to overcurrent conditions, protecting the load from damage.
- Power Dissipation: Ensure that the power dissipated in the BCP56-QF and Rs is within their respective ratings, especially during overcurrent conditions.
- Temperature Stability: Consider the temperature coefficient of the sensing resistor Rs to maintain accuracy in overcurrent detection across different temperatures.
- Protection of Transistor: The feedback diode D1 protects the BCP56-QF from negative voltage spikes that can occur when the transistor turns off and the magnetic field in the load (if inductive) collapses.
In conclusion, the BCP56-QF transistor can be effectively utilized in an overcurrent protection circuit to safeguard DC power supplies and their loads from damage due to excessive currents. The design of the circuit should take into account the sensitivity to overcurrent, the speed of response, and the thermal management of the components involved.
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All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the BCP56-QF we delivered, we will accept the replacement or return of the BCP56-QF only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of BCP56-QF.
(3)The PartNo is unused and only in the original unpacked packaging.
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