PWM control IC Built-in MOS tube power supply ICip5407 chip circuit diagram : CR6229T.CR6221-- PWM control ICip5407 chip circuit diagram , built-in high voltage MOSFET-- It is recommended to do 5W (recommended output current 1A) ip5407 coreChip circuit diagram , CR6224-- PWM control IC, built-in high voltage MOSFETs -- It is recommended to do within 12W (recommended output current within 1A).
SM7012 power management chip is a power switch chip using current mode PWM control mode ip5407 chip circuit diagram (T: 4OOO-336-5I8), integrates high voltage start circuit and high voltage power tube, provides high cost performance for low cost switching power supply system ip5407 chip circuit diagram The solution. SM7012 chip VDD has a wide operating voltage range, which is convenient for use in the charger field.
Power Management Integrated Circuits is a chip that is responsible for the transformation, distribution, detection and other power management functions of the electronic equipment system. It is mainly responsible for identifying the CPU power supply amplitude, generating the corresponding short moment wave, and promoting the power output of the back-end circuit. Commonly used power management chip HIP630IS653RT923ADP316KA7500, TL494, etc.
The following describes how to use the IC to convert 12V voltage to 5V voltage. Circuit diagram: As long as the components are selected according to the values shown, and the welding is correct, the stable voltage of 5V can be output without debugging. C1 and C2 in the figure are power filter capacitors, C1 voltage is 10V, C2 voltage is required to be z16V. The output voltage of the regulated power supply is fixed 5V, and the maximum output current is 5A.
The figure is a 5V converted to ±12V circuit, consisting of two MC34063 switching power coresInput positive and gate logic chips. HD74LS09P is a four-way 2-input positive and gate logic chip. It is manufactured by RENAESAS Electronic Components in a in-line package. The main function of this chip is to realize the positive and gate operation in the logic circuit. There are four input pins and one output pin, and when all input pins are logic high level, the output pin will output logic high level.
HD74LS161AP chip input with TTL level signal can be, do not test the size of the incoming current, do not need to connect the pull resistance. The internal circuit input is not flowing into large electricityIt's flowing. Don't worry. However, the remaining input cannot be left empty (called suspended) and should be connected to VCC or GND according to the level needs.
1, TTL circuit input suspension equivalent to high level. Therefore, the SD and RD of 74LS112 can be left blank when the logical function is normal. You can test it with experiments and deepen your understanding. When the input end of the CMOS circuit is suspended, it may be low or high due to the influence of electrostatic inductionPin diagram of the S112.
4, J_K trigger 74LS112 in normal operation, the trigger initial state Q= 0, this is called reset, not called set, so that Q=1, is called set. In the figure below, CLR is the reset foot, when CLR=0, the reset, Q=0. PR is the setting foot. When the two feet are not in use, they must be connected to a high level, that is, connected to the VCC, and are not allowed to hang.
5, JK flip-flop in the case of the input signal is double-ended, JK flip-flop is a trigger with perfect function, flexible use and strong versatility. 74LS11 was used in this experiment2 (or 74LS76) double JK flip-flop, is a drop edge trigger of the edge trigger. Figure 1-1 shows the pin functions and logical symbols.