This article mainly explains the application of diodes/transistors produced by Hecotai in hotel smart door locks. Hotel locks (ie hotel smart locks) use the whole process management to empower hotels, which greatly improves the efficiency of hotel check-in and room management. At present, the popularity of hotel locks has been relatively high, and hotels in many places have installed hotel locks, which not only facilitates the management and maintenance of the hotel, but also greatly improves the overall safety of the hotel.

Hotel smart lock functions include: main control module, antenna module, WIFI/BT/NB-IOT communication module, display, speaker, buzzer, indicator light, motor and driver, fingerprint collector, touch keyboard, NFC, etc.;

The discrete devices produced by Heketai have been widely used in hotel smart lock products, mainly in basic circuits to assist system function realization and low power consumption design.

The following figure is the lock block diagram of the hotel smart lock. Including:

B, power management circuit

C, power detection circuit

D. Anti-reverse circuit

E. Small signal controls four circuits. Next, the specific device selection of the four circuits is explained.

1. Power management circuit

In this circuit, the main products used by Hecotech are:

Transistor: S8050 MMBT3904 BC817 S9013 S9014 (packaged with SOT-23)

MOS tube: SI2301 SI2309 AO3401 (packaged with SOT-23)

2. Power detection circuit

In this circuit, the main products used by Hecotech are:

Diodes: 1N4148 1N4001 M1 BAV99 (packaged with SOD-523 SOD-323 SOD-123)

Transistor: S8050 S8550 MMBT3904 MMBT3906 BC807 BC817 (packaged with SOT-23)

3. Anti-reverse circuit, there are two schemes for anti-reverse circuit

In this circuit, the main products used by Hecotech are:

Schottky diodes: RB520 1N5817 1N5819 SS14 BAT54 (packaged with SOD-523 SOD-323 SOD-123 SMA)

Diodes: 1N4148 1N4001 M1 BAV99 (packaged with SOD-523 SOD-323 SOD-123)

MOS tube: SI2301 SI2302 AO3401 AO3400 2N7002 (packaged with SOT-23)

4. Small signal control circuit

In this circuit, the main products used by Hecotech are:

Transistor: S8050 S8550 MMBT3904 MMBT3906 BC807 BC817 (packaged with SOT-23)

MOS tube: SI2301 SI2302 AO3401 AO3400 2N7002 (packaged with SOT-23)

The hot-selling models of Hecotai products in hotel smart locks are as follows:

Heketai Electronics is a supplier specializing in the development and production of various discrete devices such as diodes, triodes, MOS tubes, rectifier bridges, etc. The products include Schottky diodes, rectifier diodes, TVS diodes, switching diodes and other diode series; Bipolar transistors, digital transistors, three-terminal voltage regulators and other triode series; medium and low voltage MOS tube series; SMD rectifier bridge series; annual production capacity of 12 billion.