1. Industry background

Smart door locks, as standard security equipment standard in modern communities, are gradually penetrating into our daily life with their excellent user security and convenient identification and management functions.In 2024, the sales of home smart door locks will reach 20.5 million units.In the complex system of smart door locks, electronic components play an indispensable role, especially the separate devices, which have the characteristics of high accuracy, strong customization, high power, and high reliability. Functional cornerstone.

(Data source: China Business Intelligence Network)

2. Smart door lock composition

Smart door locks have greatly enhanced the convenience of life through fingerprints, passwords, facial recognition and other unlocking methods.Its core functional modules include, but not limited to: main control chip, antenna module and communication module, display module, speaker, bee, motor drive system, battery power supply system.The diodes can be seen everywhere in these systems, and which core applications are played in the family smart door lock. Let's take a look.

three,The diode is applied in the smart door lock

In such a highly integrated system,The diode plays the role of rectification, stabilization, switching, and detection.

Rectification:In AC power, the direction of the current is constantly changing.By connecting the diode with the load, the current can only flow over the load in one direction, so that the AC electricity can be converted into a DC electricity

Stabilization:diodeWith a stable breakdown voltage,,When the reverse voltage exceeds this value, the diode will start conducting electricity, which is limitedThe voltage production voltage is further increased to maintain the stability of the output voltage

switch:The diode is turned on when the bias is turned on, and it is cut off in the reverse bias.This characteristic allows the diode to be used as an electronic switch.In digital circuits, diode (especially transistor and field effect pipes) is often used as switch elements for logical door circuits to control the circuit to break

Detection:In the circuit of the radio receiver, the diode is often used as a detector, which extracts low -frequency signals (ie audio signals) from the modulated RF signal.When the radio frequency signal passes through the diode, due to its non -linear characteristics, the low -frequency current corresponding to the modulation signal can be generated to realize the demodulation of the signal.

Four,Product promotion

MDDofswitchDiode1N4148WAs well as1N4448WAs well asBav16wAs well asBav19wAs well asBav2owAs well asBav21w, etc.,,It is widely used in basic circuits such as voltage detection and circuit protection, helping smart door locks to achieve low -power and high stability design goals.

Used for surface stickers

Glass passivation chip node

Quick reverse recovery time

The ideal choice of automatic paste

Leadless, in line with the EU Rohs 2011/65/EU instruction Requirements