Transistor undervoltage reset circuit
Source: InternetPublisher:天天都吃好吃的 Keywords: Power supply regulated power supply Updated: 2020/07/23
The working principle of the undervoltage reset circuit (as shown in the figure) w When the power is turned on, the +5V voltage starts to rise from "0V". Before rising to 3.6V, the Zener diode DH03 is in the cut-off state, and QH01 (PNP tube) is also in the Cut-off state, no reset voltage output.
When the +5V power supply voltage is higher than 3.6V, the Zener diode DH03 reversely breaks down and "clamps" the voltage at both ends at 3.6V.
When the +5V power supply voltage is higher than 4.3V, QH01 begins to conduct, and the reset voltage begins to form. When the +5V power supply voltage approaches +5V, QH01 has saturated conduction, and the reset voltage reaches a stable state.
- Redundancy principle of power management system, a redundant design strategy in outdoor power BMS
- Build a simple buck-boost regulator and test it on a breadboard
- Fabrication of multi-cell lithium battery charging circuit
- Introduction and principle analysis of switching regulated power supply
- INA155/INA156 is used to form a single-supply high-side current monitor for detecting load current
- Parallel DC regulated power supply circuit diagram
- Homemade low-power UPS
- 0.7～24V continuously adjustable current limiting power supply
- Electric bicycle battery charger circuit
- Reconstruction of the tube pre-stage by using low voltage difference power supply
- Power circuit of STR5412
- Three-way DC-DC converter circuit
- Commonly used power circuits in printers
- FGDF-3 three-phase low-temperature iron-plated power supply circuit
- Timing switch AC power circuit
- Karaoke light controller circuit (1)
- Household emergency power circuit 02
- Antenna amplifier synchronous power supply circuit
- Telephone power circuit
- High quality power supply circuit schematic diagram
京公网安备 11010802033920号