Agree that the 1st floor 5v regulated power supply chip , the 2nd floor says that the 7805 of the 5v regulated power supply chip is not OK, and the input voltage of the 7805 must reach at least 8V to work normally.
If you can only use 6V power supply, you can enableUse 1117-5V to regulate the voltage, it is an LDO chip. Many manufacturers have this product, SONY CXA1117, TI REG1117, NS LM1117 and so on, but it must be noted that 1117 has many kinds of voltage versions, must be -5V is 5V output, -ADJ is adjustable version.
LM78L065v voltage regulator chip : This is a 6-pin voltage regulator chip with an output voltage of 6V and a maximum output current of 100mA. LM2940: This is an output voltage of5V, 6-pin voltage regulator with maximum output current 1A. LM317: This is a 6-pin voltage regulator chip with adjustable output voltage, which can be adjusted through an external circuit with a maximum output current of 5A.
LM1117 can not be used, because its instability voltage is 1V~2V, at least higher than the output voltage 1V~2V above the input voltage it can work normally, for 5V output LM1117, the input voltage must be more than 1~2V.
Recommended at 2017-12-16 18:35:06 Best Answer 34063The maximum allowable current of the switch is 5A, and at 75% efficiency, the BUCK circuit 12VIN is enough to output 5V-1A-2A. No need to expand the flow. But the heat sink must be added. In addition, if the flow is expanded, choose the TO220 transistor or MOS as the expansion switch tube, and also need to add a radiator on it. It's just that similar radiators are easier to match. Switch tube selection as long as the current and switching speed are guaranteed.
V--5V circuit can be LM7805 to achieve the volume of a peanut. 6--7V circuit can be connected to 3 silicon rectifier tubes end to end, and then access the circuit silicon base twoThe diagram usually contains elements such as an input capacitor, a voltage regulator chip, an output capacitor, and a filter.
LD1117 is a low-voltage differential linear voltage regulator chip, and its voltage regulator output values are 2V, 8V, 5V, 85V, 3V, 3V, 5V, and the output current is 0.8A.
For 5V output LM2575 products, different packaging forms, the complete representation is LM2575T-0, LM2575T-0 Flow LB0LM2575N-0, LM2575M-0, LM2575S-0.
is a "three-terminal voltage regulator integrated voltage regulator IC", originally launched by the "National Half" (LM) company in the 1980s, is a high-precision, low ripple, high current (relatively speaking), greatly simplifying the traditional voltage regulator circuit integrated circuit, only three pins, the peripheral circuit is extremely simple. < / p > < p > hello: to the chip I enumerate several such as: (1), LM7807807807807801781787824And so on. The working principle of the above 78 series of chips is as follows: ①, the fixed three-end regulator belongs to the series voltage regulator circuit, that is, the linear voltage regulator circuit, so its principle is equivalent to the series voltage regulator circuit of the discrete component.
L78XX is a positive voltage stabilizer and value three-end integrated voltage stabilizer block, with the front facing the inscription logo, the left foot is the input pole, the middle is the common earth pole, and the right is the voltage stabilizer output pole. The L79XX is a three-end integrated regulator block with a negative voltage regulator setting value. The front face is marked by the inscription, the left foot is the common ground pole, the middle is the input pole, and the right side is the voltage regulator output pole.
This is a three-terminal voltage regulator78 means that the output voltage is positive, 24 means that the output voltage is 24 volts. Corresponding to 7924, the output is negative voltage. It's all DC.