UC3842 Power pin (7 pin) voltage On the threshold of 16V, off the threshold of 10V, the maximum voltage must not exceed 34V.
Pin 1: This is the power supply pin of 3842, which is usually connected to a positive power supply voltage. Pin 2: This is the ground pin of 3842 and needs to be connected to the ground wire. Pin 3: This is the output pin of 3842, which is usually connected to the load of the external circuit.
Pin functions are detailed as follows: ① The pin is the output end of the error amplifier, and the external resistance and capacitance element is used to improve the gain and frequency characteristics of the error amplifier. The foot is the input end of the feedback voltage, and the voltage of the foot is compared with the 5V reference voltage at the same phase of the error amplifier to generate the error voltage, so as to control the pulse width.
is generally between 10-30V. 7 is the power pin, and 20v is normal. In general, just switchRich interface and a variety of memory, but also built-in high precision timer.
2, according to your requirements, the current market is easier to purchase, low price, easy to develop ARM core microcontroller can choose NXP LPC111x series. You have all the peripherals you require, but the power consumption is slightly excessive, at 12M main frequency, you need 3mA/3V.
3, Freescale's Kinetis E series single-chip microcomputer supports wide operating voltage, this series chip uses ARM Cortex-M0 core, low power consumption.
1, Zhenbang Micro Technology launched a new 3V 5V (AH6901) switching market 6291 boost chip, AH6901 is a small package (SOT23-6), CC (constant current) mode PWM boost IC, suitable for lithium battery (3 ~ 2V) output 5V 1A mobile power applications.
2, the voltage boost chip principle Voltage boost chip is an electronic component that can boost the input voltage to a higher voltage, thereby providing a higher voltage.Its principle is to use the characteristics of electronic components to convert the input voltage into a higher voltage.
3, V to 12V 1A booster chip: SX1318 is a wide voltage output, DC-DC converter.
Can work at 3V-40V input voltage. With short circuit current limiting function. Low static operating current. Output switching current up to 5A (noneExternal triode). The output voltage is adjustable, the maximum output voltage is 36V. Operating oscillation frequency from 100HZ to 100KHZ.
Of course is to use the DC-DC boost circuit (boost topology), by adjusting the feedback, get the voltage you need to increase. The efficiency is more than 80%. The boost output must be connected to the capacitor, generally within 10UF is enough, the ripple is very small, are millivolt level, MCU application can not care about this ripple.
VCC is the so-called high voltage you need. If the positive power supply of STM32 is 3V, connect it to 3V.Either circuit will do. If the STM32 positive supply voltage is lower than 3V, you can only use the left circuit, connect the VCC to 3V. OUT, OUT- is the output end, the IO port control end sets the push-pull output.
After the boost (24V) current to reach a few hundred amps (200A), the output power will reach 4800 watts, and the 12V power supply to provide 4800 watts of power, the output current must reach at least 450A (efficiency according to 90%), such a current wire is estimated not to be a general wire, but should use conductive copper bar or cable.
1, FS4059D is a 5V input, support four lithium battery boost charge management IC. FS4059D built-in MOS tube, the use of asynchronous switching architecture, so that it needs only a few peripheral devices in the application, can effectively reduce the overall scheme size, reduce the BOM cost.
2, single battery boost: PW5100 This PW5100 boost IC is your ideal choice, it can adjust the voltage range of 3-5V to5V, maximum efficiency up to 95%, operating frequency of 2MHz, and static current of only 10uA. Its low power consumption makes it particularly useful in applications where high performance is required.
3, Zhenbang Micro technology launched a new 3V 5V (AH6901) switching market 6291 boost chip, AH6901 is a small package (SOT23-6), CC (constant current) mode PWM boost IC, suitable for lithium battery (3 ~ 2V) output 5V 1A mobile power applications.