Index 2 - Power-Supply Circuits-DC to DC - power supply circuit - SeekIC.com

The MAX732/733 is a DC-DC current PWM step-up regulator. The MAX732 has an output voltage of +12V with a maximum output current of 200mA and an output voltage range of +4.0V to +9.3V. The MAX733 features an output voltage of +15V, a maximum current of 125mA, and an output voltage range of 4.0V to 11V. The typical full load efficiency ranges from 85% to 92%, while the empty load current is 1.7mA. The oscillation frequency is 170 kHz. This regulator includes protective circuits for periodic current-proof, overcurrent-proof, undervoltage-proof, and programmable soft-start. The MAX714/715/716 series represents a power supply system powered by cell batteries, featuring a microprocessor for detection. This system consists of a four-loop logic-controlled +5V regulator, a three-loop switched regulator, a fixed positive output single-loop (+12V or +15V), a software-controlled negative output single-loop, and a fixed negative single-loop. The static current is 20A. This system is equipped with a spare cell battery switch, a low voltage warning, and the capability to restart if the cell fails. The step-down variable power circuit, composed of the MC34063, is depicted in the diagram. The MC34063 is a type of highly active switching mode DC/DC converter. Its internal components include a reference voltage source with temperature compensation, a comparator, a duty ratio controllable oscillator with a current-limiting circuit, a driver, and a heavy current output switch. The +25V/+5V step-down variable power circuit is shown in the figure, with specifications including a line regulation of 12mV ±0.12% and load regulation of 3mV ±0.03% at an input voltage of 25V and output current of 500mA. The ripple voltage is 120mV, which can be reduced to 40mV with a one-level filter. The conversion efficiency is 82%, and the short-circuit limiting current is 1.1A. The EPC-755A photoelectric encoder exhibits excellent performance and anti-interference capabilities for angle and displacement measurements. It provides stable and reliable output pulse signals, which can be measured digitally. In the development of a driving simulator for a car, the EPC-755A photoelectric encoder is selected as the sensor for measuring the steering wheel rotation angle. Its output circuit utilizes an open collector configuration, and the output resolution is set to 360 pulses per circle, allowing for both clockwise and counterclockwise counting of the steering wheel's bidirectional rotation. The diagram illustrates a digitally controlled adjustable integrated regulated power supply circuit composed of CW117, CW217, and CW317. The figure represents a digital control adjustable integrated regulated power supply, with an 8-bit binary code input. Careful selection of resistors R0 to R8 allows for an adjustable output voltage range from 2.5V to 120V, with a stepping value of 0.5V. High precision is required for resistors R0 to R8, particularly for the highest binary code resistance. For example, when the accuracy of R0 and R8 is ±0.1%, the output precision at 120V is approximately 0.5V. When the 8-bit binary code is 00000000, all transistors VT1 to VT8 are off, resulting in maximum output voltage. Conversely, when the binary code is 11111111, all transistors are on, and the combined resistance of R0 to R8 is equivalent to the resistance R2 of the standard circuit, yielding the lowest output voltage. The output voltage must be adjusted to ensure that the input and output voltages of the integrated regulator remain below the permissible value of 40V. The MC3406A is a new monolithic buck-boost DC-DC converter integrated circuit that accepts an input voltage range of 3V to 40V, with an adjustable output voltage. The output switch current can reach up to 1.5A, and it features a temperature-compensated voltage reference along with current limiting capabilities. The IC requires only a few external components to create boost, buck, and anti-transition configurations.

The MAX732 and MAX733 regulators are designed for applications requiring efficient step-up voltage conversion. Their specifications make them suitable for battery-powered devices where efficiency and compact size are critical. The inclusion of protective features enhances reliability, ensuring stable operation under varying load conditions.

The MAX714/715/716 series is particularly advantageous in applications where battery management is essential, providing a robust power supply solution with built-in detection and safety features. The microprocessor control allows for intelligent management of power delivery, optimizing performance while safeguarding against potential failures.

The MC34063 step-down converter is ideal for applications needing a reliable and efficient means of reducing voltage while maintaining output stability. Its versatility in handling different input voltages and its current limiting feature make it suitable for a wide range of applications, from simple power supplies to more complex systems requiring precise voltage regulation.

The EPC-755A encoder's high-resolution output is essential for applications in robotics and automotive systems, where accurate measurement of position and movement is crucial. Its ability to operate in both directions allows for comprehensive data collection in dynamic environments.

The digitally controlled adjustable power supply circuit represents a significant advancement in precision power delivery, allowing for fine-tuning of output voltages in various applications. The careful selection of resistor tolerances is critical for achieving the desired output precision, making this circuit suitable for laboratory and industrial applications where exact voltage levels are necessary.

Lastly, the MC3406A's buck-boost capabilities expand its usability in diverse electronic designs, accommodating various input and output requirements while ensuring reliable performance across a broad spectrum of operating conditions.MAX732/733 refers to the DC-DC current PWM step-up regulator. As to MAX732, output voltage is +12V, maximum output current is 200mA, output voltage range is +4. 0~+9. 3V. And as to MAX733, the relevant values are +15V, 125mA and 4. 0V~11. V respectively. Typical value of full load efficiency is 85%~92%, of empty load current is 1. 7mA. Oscillation frequency is 170 kHz. The regulator has protection circuits for periodic current-proof, overcurrent-proof, undervoltage-proof and programmable soft-start. (View) MAX714/715/716 refers to the power supply system powered by cell piles. It has a micro-processor for detection. This system consists of a four-loop logic-controlled +5-V regulator and a three-loop switched regulator, a fixed positive output single-loop(+12V or +15V), a software-controlled negative output single-loop and a fixed negative single-loop.

Its static current is 20A. This system has a spare cell piles switch, a low voltage warner and it can restart if the cell lapses. (View) Step-down Vary Power Circuit Composed ofMC34063 is shown in the diagram. MC34063 is a type of switching modehighly active DC/DC Changed circuits. Its internalincludes reference voltage source withthe function of temperature compensation, comparator, duty ration controllable oscillator with limited current circuit, driver and heavy current output switch tube.

The +25V/+5V step-down vary power composed of it is shown in the picture, the features are: (VIN=25V when IO=500mA) line regulation is 12mV ±0. 12%; load regulation is 3mV ±0. 03%; ripple voltage is 120mV. If one-level filter (shown in figure) output ripple reduced to 40mV; conversion efficiency is 82%; short-circuit limiting current is 1.

1A. (View) EPC-755A photoelectric encoder has good performance and has good anti-interference in angle and displacement measuring. EPC-755A photoelectric encode also owns stable and reliable output pulse signal, and the pulse signal can be obtained after the count is measured in digital signal.

On the steering wheel rotation angle measurement EPC-755 A photoelectric encoder is chosen as sensor when we develop a driving simulator in the car. Its output circuit chooses open collector and output resolution selects 360 pieces of pulses/circles, which can be clockwise and counterclockwise, considering the steering wheel rotation is bidirectional, and it can be counted after detecting the output signal of the encoder.

(View) Here is the diagram of digital controlled adjustable integrated regulated power supply circuit composed of CW117, CW217 and CW317. The figure shows the digital control adjustable integrated regulated power supply. Digital control input is 8-bit binary code. Reasonable choice for the resistance resistance R0 ~ R8 can get the CNC adjustable integrated regulated power supply that its output voltage is 2.

5 ~ 120V and stepping value is 0. 5V. The precision requirement of resistance R0 ~ R8 is high. The requirement of the high binary code resistance is highest. Such as when the accuracy of R0 and R8 is ± 0. 1%, the output precision of 120V high-voltage is about 0. 5V. When the 8-bit binary code is 00000000, the transistor VT1 ~ VT8 all stop, the output voltage is maximum. When the 8-bit binary code shows 11111111, the transistor VTl ~ VT8 are all turned on, R0 ~ R8 9 resistors in parallel is equivalent to the resistance R2 of the standard circuit, then the output voltage is the lowest.

Adjust the output voltage to make the input and output voltage of the integrated regulator is less than the allowed value(40V). (View) MC3406A is a new monolithic buck-boost DC-DC converter integrated circuit, the input voltage is 3 ~ 40V, output voltage isadjustable, the output switch current can up to l.

5A, and it hasa temperature compensated voltage reference, it has the function of current limit. The IC is equipped with only a few external components, then it can form boost, buck, anti-transition 🔗 External reference