Step-down chip. 188 digital tube car charger DCDC input terminal adopts SIIPOWER synchronous buck chip, model: SP1259HN, display master FH8B32S16 identification load voltage.
I think you want to subvert the general single-chip microcomputer when using a total positive drive, insteadCommon cathode type digital tube, and then use a solid-state relay as a switch, the general solid-state relay can withstand more than 5A current, the voltage can be as high as 380V, driving a digital tube is not a problem.
Is it PIC16F1507? It doesn't require an external passive crystal, and even if you buy it, you won't be able to write the transcription program.
The common anode is to connect the anodes of the eight leds together. The schematic diagram is as follows. The two COM ends of the pin diagram are connected together, which is a common end, and the common negative digital tube will ground it, and the common positive digital tube will connect it to the positive 5 volt power supply.
Push-pull circuit, can also use bridge circuit, because the power is not large, the bridge circuit is not cost-effective. If you choose a push-pull circuit, you can use either 3525 or 494. Specific models are KA3525A, KA3524, SG3524, SG3525, TL494, UC494 and so on.2, DCDC】 represents a DC power supply, such as dry batteries or vehicle batteries. The 220V power supply for home use is an AC power supply. If one DC voltage (0V) can be converted into another DC voltage (5V or 0V) through a converterThis converter is called a DC/DC converter, or a switching power supply or switch regulator.
3, lambda Japan is a full-service global company to provide customers with power supply, with switching power supply, uninterruptible power supply device (UPS) Japan lambda module, lambda power module PP and AS and PC series, input 5V, 12V, 24V, 48V, output 5V, 12V, 15V, 24V, 48V, power 5-25W, output voltage adjustable.
4, for AC, the transformer is the most capacitiveEasy, but large, not easy to adjust. The use of electronic circuit boost efficiency is low but easy to adjust and can obtain more stable voltage. The efficiency of switching power supply in electronic circuit is relatively high. For DC, electronic circuits must be used to turn DC into alternating current to boost voltage. The principle of switching power supply is to control the output voltage by controlling the turn-on and turn-off time.
5, as a low-power device, OBC is mainly responsible for providing convenient charging for our electronic devices through the on-board power supply, whether it is 12V for cars or 24V for trucks, it is compatible. It's a great way to charge lithium batteries for portable devices. YeahThe selection of power management chips has strict requirements: high voltage resistance, high efficiency, high reliability and low frequency switching power supply characteristics to ensure a safe and stable charging experience.
6, in the figure above, the optocoupler photocell (U2B) is connected between the 5-6 winding and the power chip, and the optocoupler LED (U2A) is connected in the 12V circuit. The increase or decrease of 12V will cause the brightness of U2A to change, the degree of U2B conduction changes with the brightness of U2A, and the C-pin potential of the power chip changes with the degree of U2B conduction. The power chip automatically adjusts the working state according to the potential of pin C, so that the output end is always stable at 1Two V.
Power supply. Ling-core micro LC1210-3V voltage regulator chip -- Shenzhen Hengli LC1210 is a 200mA, static power consumption is only 5uA, voltage up to 12V, low noise. Lichuang Mall provides LEADCHIP brand 53 product supply information, including linear voltage regulator (LDO), DCDC power chip, battery management, other gifts, monitoring and reset chip and other products.