Triode can amplify weak signals into electrical signals with large amplitude in the circuit, which is the current amplification ability of triode. Secondly, triode as a contactless switch is also very common. In this issue, Hottech mainly introduces an NPN transistor D882 with SOT-89 package, which is widely used in amplifier circuits, audio amplifier circuits and voltage regulator circuits.

Characteristics of D882

The package of D882 has three pins, namely base (b), emitter (e) and collector (c), which has good heat dissipation performance, stability and reliability. This D882 transistor is made of NPN channel. Its collector base voltage is 40V, collector emitter voltage is 30V, emitter base voltage is 6V, collector current is 3000mA, minimum magnification is 60, maximum magnification is 400, dissipation power is 500mW, and the weight of a single transistor is about 0.055g.. Hottech's D882 triode is packaged in SOT-89, which has the characteristics of high reliability, small size, excellent thermal performance and convenient installation.

Application of D882 Triode

As an excellent transistor product, transistor D882 can be used in voltage stabilizer, power amplifier, switching circuit, speaker equipment, wireless communication, power management, LED driver and various consumer electronic products.

Take the schematic diagram of the power tool application in the above figure as an example. The D882 triode plays a role of signal amplification in the power tool. As a very common electric tool, electric drill is powered by AC power or DC battery, and is widely used in furniture, buildings, decoration, etc. It is usually composed of electric drill shell, small motor, power switch, control switch, drill chuck, battery and drill bit. In the working state, the lithium battery transmits electric energy to the motor, and the motor works to convert it into kinetic energy, and then drives the drill bit to rotate at high speed to drill the material to be processed through gear transmission.



Take the electric drill driving board scheme adopted by a customer as an example. The PCB board of the whole circuit will use MCU chip, resistor, diode, triode, MOS tube, indicator light, capacitor, power cord and other parts and products. H-bridge motor control circuit is a classic and commonly used motor drive and control circuit.

Hottech D882 product plays the role of current signal amplification in this circuit. It has good switching speed, good switching characteristics, low switching loss and high switching efficiency. Reasonable circuit design and parameter selection can maximize the performance of D882. In practical application, customers need to choose according to the actual application requirements. The triode produced by Hottech has good performance and strong stability, and is the preferred supplier for customer procurement.