1.PL4054. The LTH7 (Model: PL4054) is a complete single lithium-ion battery with constant current/constant voltage linearityThe charger. Its SOT package and low number of external components make the PL4054 ideal for portable applications.
2, the charger online search information is a lot, the principle is much the same, the general power chip, comparator, optocoupler chip, there are different combinations, the schematic is also introduced, the chip is polished, there is no way to identify.
3, your circuit board is not a charger, it is a switching power supply, that is, AC to DC circuit board. There are many kinds of circuits, and different types of integrated blocks on the upper 8 pins are different. For example, UC384LM358. Label it6V, what is the reason '> Switching power supply chip AP8012 output pin voltage is 36V, what is the reason
1, over temperature, over voltage, over current protection pin refers to the connection from the internal circuit of the integrated circuit (chip) to the peripheral circuit, the pin constitutes the interface of this chip. According to the function, the AT89S52 pin can be divided into main power supply, external crystal oscillator or oscillator, multi-function I/O port, and control, gating and reset four categories.
2, this should be the switch is not closed. If you want to measure voltage, use a voltmeter, and the voltage shown by this test pen is extremely unreliable.
3, check CD6 two components, if the two components have no problems and no virtual welding, it may be a problem with the chip. Your component model should be AP8012 or ViPer12.
Pin 1 of the chip is the compensation end, pin 2 is the feedback end, pin 3 is the overcurrent detection end, pin 4 is the RC clock end, pin 5 is the power supply end, pin 6 is the control output end, pin 7 is the positive end of the power supply, pin 8 is the reference powerPress the end. Common fault of the charger: high voltage fault.
PIC12F675. Electric car is a common scooter, and after the electric car charger post-op amp chip, the 8-pin package and 8-pin ground is the PIC12F675 model, which is a very commonly used power supply model in the electric car charger.
is estimated to be a single chip computer, even if you know the model can not do it, bought a new, can not work without a program. If it is not a single chip computer, it is difficult to guess the model, can you find the manufacturer to repair it?
Operating voltage of each pin of UC3842BAs follows: 1 pin COMP-OUT: 5V; 2 feet FB (-) IN: 5V; 3 pins LNSS-IN: 0.5mV; 4 pin RT/CT: 4V; 5 pin GND: 0V; 6-pin V-OUT: 2V; 7-pin Vcc-IN: 14V; Pin 8 VREF-OUT: 5V.
Pin switching power supply chips U6117 and U6217. The U6117 is used on a 12V 1A charger. The U6117 is a multi-mode, high-precision primary-side feedback control (PSR) constant-current and constant-voltage (CC/CV) controlA surname
1, the OB3396 is a high precision, low cost switching power controller that provides a comprehensive range of automatic recovery protection.
2, PN8680. The octagon chip has LM35PN8680, NE555 and other models, and the octagon chip on the power board of Kehai Everywhere is PN8680. Octagonal chip, also known as octagonal integrated circuit chip, is a form of integrated circuit chip.
3. LM324 can be used instead. The LM324 series device is a quad operational amplifier with a true differential input. They have some significant advantages over standard operational amplifiers for single-supply applications. The quad amplifier can operate at supplies as low as 0 volts or as high as 32 volts with a static current one-fifth that of the MC1741.
4, there are two kinds of octagonal, one is as big as the thumbnail of the big finger BIOS chip. Smaller than a matchbox is a graphics chip.
1, if it is a passive speaker, it is the kind that does not need to be plugged in, this circuit board is a power divider, the external terminal is connected to the input end of the divider through two wires, the divider is sent to the high, medium and subwoofer through the combination of inductance, capacitance and resistance.
2, crystal transistor, is one of the basic components of semiconductor, with current amplification, is the core component of electronic circuit.
3, power amplifier chip, model TDA2030/UTC2030It's a five-legged one. The full name of audio power amplifier is audio power amplifier, which is used to promote the sound of the speaker, so as to reproduce the sound of the power amplifier device, which is used in the electronic products that sound.