Made with hex inverter DC DC converter circuit

A TTL hex inverter circuit can function as a DC/DC converter, converting 5V to 12V. This circuit encompasses all necessary functionalities for DC/DC conversion. It relies on a TTL switching threshold voltage regulator. The components U1A and U1B form an oscillator with a switching frequency of 1MHz. The output of the oscillator drives three parallel inverters, U1C, U1D, and U1E, which provide high output current and power. The internal output transistor, along with inductor L1 and diode D1, creates a standard boost converter. When the output is low, current flows through inductor L1; when the output goes high, the energy stored in L1 causes the anode of D1 to become high, allowing D1 to conduct and charge capacitor C1. U1F monitors the output voltage through feedback resistors R1 and R2, which create a voltage divider. When the voltage across C1 exceeds 12V, the TTL logic input of U1F exceeds its threshold (approximately 1.2V), causing U1F's output to go low and inhibit further voltage increase. Conversely, if the output voltage drops below 1.2V, U1F reactivates, allowing the oscillator to continue driving the switching power supply. The circuit exhibits line and load characteristics better than 1%, with the output voltage remaining stable within a range of 0 to 50V, with only a 7% variation. The 7406 hex inverter operates as an open-collector device, capable of outputting 30V at 40mA, enabling the three parallel switches to drive a peak current of 120mA.

The circuit design incorporates a TTL hex inverter, which is essential for establishing the necessary voltage levels and switching characteristics for effective DC/DC conversion. The oscillator, formed by U1A and U1B, operates at a frequency of 1MHz, ensuring rapid switching necessary for efficient energy transfer. The parallel configuration of inverters U1C, U1D, and U1E enhances the output current capacity, making the circuit suitable for applications requiring higher power levels.

In the boost converter topology, inductor L1 plays a pivotal role in energy storage. During the low output phase, L1 accumulates energy, which is subsequently released when the output transitions high, driving the diode D1 into conduction. This process effectively steps up the voltage, charging capacitor C1 to the desired output level.

The feedback mechanism involving U1F is crucial for maintaining output voltage regulation. By monitoring the voltage across C1 through the voltage divider formed by resistors R1 and R2, U1F provides a control signal that modulates the operation of the oscillator. This negative feedback loop ensures that the output voltage remains within specified limits, preventing overvoltage conditions that could damage downstream components.

The circuit's performance metrics, such as line and load regulation, indicate its robustness in varying operational conditions. With a regulation better than 1% and minimal output voltage variation, the design is well-suited for applications requiring stable power supply characteristics. The use of the 7406 hex inverter in an open-collector configuration is advantageous, as it allows for higher voltage outputs while maintaining the ability to drive significant current loads, thereby enhancing the overall efficiency and reliability of the DC/DC converter circuit. As shown by a circuit TTL hex inverter can constitute a DC/DC converter, the 5V into 12V. This circuit provides all the functionality required for DC/DC conversion. The circuit relies TTL switching threshold voltage regulator. U1A and U1B formed oscillator switching frequency 1MHz. The oscillator output drives three parallel inverter U1C, U1D and U1E, provides high output current and output power. Its internal output transistor, L1 and D1 form a standard boost converter, when the output is low, the current will flow through the inductor L1; when its output goes high, the energy stored in the inductor forces the anode of D1 becomes high, D1 conducts to charge C1.

U1F monitor the output voltage feedback resistors R1 and R2 on the partial pressure, when the C1 voltage is higher than 12V, U1F TTL logic input exceeds the threshold (approximately 1.2V), U1F output goes low, inhibit voltage continues to rise; when the output voltage landing is less than 1.2V, U1F closed again to allow the oscillator driver switching power supply. The circuit line and load characteristics of better than 1%, the output voltage in the range of 0 ~ 50 only 7%.

7406 requires the use of open-collector hex inverter, the inverter can output 30V, 40mA, so the three parallel switch can drive 120mA peak current.