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DC DC Power Converters electronics projects

DC DC Converters circuit projects design using buck converter, boost converter and flyback converter topology .

ISL62391, ISL62392 power supply controller

Using the ISL62391, ISL62392 power supply controller can be designed a very simple power supply circuit for battery-powered systems. This power supply controller circuit includes two pulse-width modulation (PWM) controllers, adjustable from 0.6V to 5.5V, and a linear regulator (LDO3) that generates a fixed 3.3V and can deliver up to 100mA. The ISL62391, ISL62392 include on-board power-up sequencing, a power good (PGOOD) output, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown.
As you can see in the circuit diagram , this electronic project require few external electronic parts .
This power supply converter electronic circuit project will provide a 5 and a 3.3 volt output voltage at a maximum output current of 8 amperes supporting a wide input voltage range from 5.5 volts , up to 25 volt.

The patented R3 PWM control scheme provides a low jitter system with fast response to load transients. Light-load efficiency is improved with period-stretching discontinuous conduction mode (DCM) operation. To eliminate noise in audio frequency applications, an ultrasonic DCM mode is included, which limits the minimum switching frequency to 28kHz.
The OVP fault detection circuit triggers after the FB pin voltage is above the rising overvoltage threshold for more than 2μs. The FB pin voltage is 0.6V in normal operation. The rising overvoltage threshold is typically 116% of that value, or 1.16*0.6V = 0.696V .
LDO3 and PVCC LDOs can dissipate non-trivial power inside the regulator at high input-to-output voltage ratios and full load conditions. To protect the silicon, continually monitor the die temperature. If the temperature exceeds +150°C, all outputs will be turned off to sharply curtail power dissipation. The outputs will remain off until the junction temperature has fallen below +135°C.

ISL62391, ISL62392 power supply controller electronic circuit diagram project

ISL8016 high power DC DC converter electronic circuit

A very efficiency high current DC DC converter electronic circuit project can be designed using the ISL8016 high efficiency, monolithic, synchronous step-down DC DC converter that can deliver up to 6A continuous output current from a 2.7V to 5.5V input supply. The output voltage of the ISL8016 DC converter is adjustable from 0.6V to VIN. With an adjustable current limit, reverse current protection, pre-bias start and over temperature protection the ISL8016 offers a highly robust power solution. This circuit uses current control architecture to deliver fast transient response and excellent loop stability.

The ISL8016 integrates a pair of low ON-resistance P-Channel and N-Channel internal MOSFETs to maximize efficiency and minimize external component count ( as you can see in the circuit diagram this schematic project require few external electronic parts) . 100% duty-cycle operation allows less than 200mV dropout at 6A output current. Adjustable frequency and synchronization allow the ISL8016 to be used in applications requiring low noise.
As you can see in the table bellow you must change just some electronic parts to design a new project with other output voltage .

ISL8016 DC DC converter electronic circuit project component selection
DC DC converter electronic circuit project can be designed using the ISL8016

LTC3872 5 to 12 volt converter electronic circuit project

A very simple high efficiency and high power 5 to 12 volt converter electronic circuit project can be designed using the LTC3872 constant frequency current mode boost DC DC controller that drives an N-channel power MOSFET and requires very few external components.
The No RSENSE architecture eliminates the need for a sense resistor, improves efficiency and saves board space.

The LTC3872 provides excellent AC and DC load and line regulation with 1.5% output voltage accuracy. This circuit incorporates an undervoltage lockout feature that shuts down the device when the input voltage falls below 2.3V.
High switching frequency of 550kHz allows the use of a small inductor . This converter electronic circuit require a 5 volt DC input and will provide a 12 volts output at a maximum output current of 2 ampere .

5 to 12 volt converter electronic circuit project using LTC3872

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