The switching power supply circuit in the digital cable set-top box is shown in the figure. It can be seen from the figure that it is mainly composed of an AC input circuit, a rectification and filtering circuit, a switching oscillating circuit, a switching transformer T602, a secondary rectifying filter, and a voltage stabilizing circuit.
(l) AC input circuit
The AC input circuit is composed of a fuse F601, a mutual inductance filter T601, filter capacitors C601, C603, C604, and the like. Its function is to filter out the pulse interference in the AC input signal.
(2) Rectifier filter circuit
After the AC 220V voltage is filtered, the bridge rectifier R601, the rectification and filter capacitor C605, the filter and the bridge rectifier circuit output about 300V DC voltage are sent to the switch transformer T6024.
(3) Switching oscillator circuit
The switching oscillator circuit is mainly composed of JC601 and peripheral circuits. The oscillating circuit, the voltage regulator control circuit and the switching field effect transistor are all integrated in IC6 (tl(E2A265). After starting up, the AC 220V rectified output 300V DC voltage is applied to the IC601 through the switching transformer T601 primary winding 4~@ Solid, 5 pin, IC6014, @脚内开关 switch field effect transistor drain. At the same time of starting, DC 300V through R603. Forming the sway voltage is applied to pin 7 of IC601, powering the circuit in IC601, making IC601 The oscillation circuit is started, and the switching current is started in the primary winding 4@@ of the switching transformer 601T601.
Quickly brew the perfect cup of tea or make pour over coffee right at the table with the Electric Tea Kettle. With 1500 watts, this Electric Kettle boils water faster than a microwave, and is safer to use than a stovetop kettle because it automatically turns off when the water reaches a boil. Serving at the table is no problem as the kettle lifts off the base without the cord. Additional features include two water level windows and a pull-lid to make filling and serving easy.
Features:
- Thermostat Control – Having a thermostat control allows the kettle to [know" when to shut off. This will prevent damage to the heating element and is an important feature in all modern styles.
- Auto shut off/Boil Dry Protection/Fuse – these are three features that are great for protecting the safety of users as well as extending the life of the electric kettle. The fuse and boil dry protection shut the kettle off if the water gets down below a certain level or if it`s left on for an extended period of time, It doesn`t burn up the kettle.
- Colors and Designs – Electric kettles come in all shapes, sizes and colors. Finding one that will fit with the kitchen design is actually pretty easy. Finding one that matches and that has the features you`re looking for can be a bit harder, but with all the choices available and the newer models on the market today, you will be able to find the perfect electric kettle for your kitchen.
- Savety in Electric- the heating element is typically fully enclosed, with a power rating of 2–3 kW at 220V. In countries with 110V mains electricity, kettles may be less powerful (1–1.5 kW) to avoid drawing too much current and requiring a very thick supply wire.
Application:
Heat the tea thoroughly
Bottle the water/beer
Boil water
Electric Tea Kettle
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