Inverting Output Switching Regulator provides -12V From 5V DC Using MC34063

INVERTING OUTPUT SWITCHING REGULATOR 5V TO -12V OUTPUT (2)

The DC/DC inverting switching regulators project is specifically designed to invert input voltages to negative outputs. It offer input voltage ranges from 4.5V to 6V and output -12V 100mA The MC34063A IC is heart of the project from On semiconductor. The MC33063A is a monolithic control circuit containing the primary functions required for DC-DC converters, This device consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This IC specially designed to be incorporated step-down, step-up, and voltage-inverting applications with minimum number of external components.

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Features

  • Input 4.5V To 6V DC
  • Output -12V 100mA
  • Output Fine Adjustable By On-board Preset
  • Header Connector for Output/Input Connections
  • Low Standby Current
  • On Board Filter To Provide Low Ripple Output
  • PCB Dimensions 31.75mmX34.93MM

 

PR1=Output Voltage Adjust

CN1=Output -12V 100mA (Negative 12V)

CN2=Supply Input 4.5V to 6V DC

 

INVERTING OUTPUT SWITCHING REGULATOR 5V TO -12V OUTPUT (3) INVERTING OUTPUT SWITCHING REGULATOR 5V TO -12V OUTPUT (1) INVERTING OUTPUT SWITCHING REGULATOR 5V TO -12V OUTPUT (1)

28V Output From 12V DC Input Step Up DC-DC Converter Using MC34063

Step Up DC-DC Converter 28V Output from 12V DC IN Using MC34063 (1)

The Step-Up DC-DC Converter project provides 28V, 175mA output with input of 12V DC. The  MC34063A IC is heart of the project from On semiconductor. The MC33063A is a monolithic control circuit containing the primary functions required for DC-DC converters, This device consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This IC specially designed to be incorporated step-down, step-up, and voltage-inverting applications with minimum number of external components.

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Features

  • Input 12V DC
  • Output 28V, 175mA
  • Output Fine Adjustable By On-board Preset
  • Header Connector for Output/Input Connections
  • Low Standby Current
  • On Board Filter To Provide Low Ripple Output
  • PCB Dimensions 28mmX33MM

 

Step Up DC-DC Converter 28V Output from 12V DC IN Using MC34063 (3) Step Up DC-DC Converter 28V Output from 12V DC IN Using MC34063 (2) Step Up DC-DC Converter 28V Output from 12V DC IN Using MC34063 (1)

 

 

 

 

 

 

 

5V 500mA Step Down DC-DC Converter Using MC34063

5V OUTPUT STEP DOWN DC-DC CONVERTER USING MC34063 (3)

The Tiny Step-Down DC-DC converter project provides 5V 500mA output from supply input up to 25V DC. MC34063A IC is heart of the project from on semiconductor. The MC33063A is a monolithic control circuit containing the primary functions required for DC-DC converters, This device consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This IC specially designed to be incorporated step-down, step-up, and voltage-inverting applications with minimum number of external components.

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Note : Connect digital millimeter at  output and adjust the on board preset to obtain 5V DC output, before you connect the convertor to load.

Features

  • Input 12- 25V
  • Output 5V, 500mA
  • Output filter for clean output
  • Output Voltage Fine Adjustable 20%
  • Header Connector for Output/Input Connections
  • Low Standby Current

 

5V OUTPUT STEP DOWN DC-DC CONVERTER USING MC34063 (4) 5V OUTPUT STEP DOWN DC-DC CONVERTER USING MC34063 (2) 5V OUTPUT STEP DOWN DC-DC CONVERTER USING MC34063 (1)

5V To 12V Step Up DC-DC Converter Using LM2577

5V TO 12V Step Up DC-DC Converter Using LM2577ADJ (1)

Step up DC-DC converter is based on LM2577-ADJ IC, this project provides 12V output using 5V input, maximum output load 800mA. The LM2577 are monolithic integrated circuits that provide all of the power and control functions for step-up (boost), fly back, and forward converter switching regulators. The device is available in three different output voltage versions: 12V, 15V, and adjustable.

Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Listed in this data sheet are a family of standard inductors and fly back transformers designed to work with these switching regulators. Included on the chip is a 3.0A NPN switch and its associated protection circuitry, consisting of current and thermal limiting, and under voltage lockout. Other features include a 52 kHz fixed-frequency oscillator that requires no external components, a soft start mode to reduce in-rush current during start-up, and current mode control for improved rejection of input voltage and output load transients.

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Features

  • Requires Few External Components
  • Input 5V DC
  • Output 12V DC
  • Output Load 800mA
  • Current-mode Operation for Improved Transient Response, Line Regulation, and Current Limit
  • 52 kHz Internal Oscillator
  • Soft-start Function Reduces In-rush Current During Start-up
  • Output Switch Protected by Current Limit, Under-voltage Lockout, and Thermal Shutdown

 

Project is based on LM2577-ADJ IC for flexibility to obtain other output voltages by changing value of feedback resistors R2 and R3

 

Output Voltage Formula V Out=1.23V (1+R2/R3) (Read Data Sheet for more information about Inductor value, Capacitor, Feedback resistors, Output current and voltage)

 

How It Works

LM2577 turns its output on and off at a frequency of 52 KHz, and this creates energy in the inductor L1.

When the NPN switch turns on, the inductor current charges up at a rate of vin/L1, storing current in the inductor. When the switch turns off,, the lower end of the inductor flies above Vin, discharging its current through diode into the output capacitor at rate of (Vout-Vin)/L1. Thus energy stored in the inductor during the switch on time is transferred to the output during the switch off time. The output voltage is controlled by amount of energy transferred which , in turn, is controlled by modulating the peak inductor current. This is done by feeding back portion of the output voltage to the error amp, which amplifies the difference between the feedback voltage and a 1.23V reference. The error amp output voltage is compared to a voltage proportional to the switch current ( ie., inductor current during the switch on time)

The comparator terminates the switch on time when the two voltages are equal, thereby controlling the peak switch current to maintain a constant output voltage.

5V TO 12V Step Up DC-DC Converter Using LM2577ADJ (3)

5V TO 12V Step Up DC-DC Converter Using LM2577ADJ (2) 5V TO 12V Step Up DC-DC Converter Using LM2577ADJ (1)

5V TO 12V Step Up DC-DC Converter Using LM2577ADJ (2)

2 Cell – Battery to 5V Step Up DC-DC Converter Using LM2623

TWO CELL-BATTERY TO 5V STEP UP DC-DC CONVERTER (1)

This project has been designed around Texas Instrument’s LM2623 IC, The LM2623 is a high efficiency, general purpose step-up DC-DC switching regulator for battery powered and low input voltage systems. It accepts an input voltage between 2.4V to 12V volts and coverts it into 5V DC. Efficiency up to 90% are achievable with the LM2623.

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Features:

  • Good Efficiency over a very wide load range
  • Very low output voltage ripple
  • 4V to 5V (Possible Input Supply up to 14V-operating voltage)
  • 5V output voltage (Other output voltages possible by changing R3 and R4)

Application:

  • Hand held instruments
  • Cameras, PDA, Cellphones
  • White LED driver

 

TWO CELL-BATTERY TO 5V STEP UP DC-DC CONVERTER (2) TWO CELL-BATTERY TO 5V STEP UP DC-DC CONVERTER (1)

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1.2V To 35V Adjustable Power Supply Using LM2576-ADJ Step Down DC-DC Converter

1.2V 35V Adjustable Power Supply Using LM2576-ADJ Step Down DC-DC Converter (1)

1.2V to 35V Adjustable DC-DC Converter project has been design around TI’s  LM2576-ADJ IC. Inputs supply 40 VDC.  LM2576-ADJ is a monolithic integrated circuit that provides all the active functions for step down switching regulator, capable of driving 3A load with excellent line and load regulation. This board has minimum number of components.

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Features

  • Output 1.2 to 35 VDC @ 3 A regulated low ripple DC voltage
  • Onboard potentiometer for output voltage adjust
  • Onboard bridge rectifier for AC voltage input
  • LED indication at input
  • Screw Terminal connectors for input and output
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 70 mm x 63 mm

 

Applications

  • Small Bench Top Power Supplies
  • Battery Chargers
  • LED Drivers

1.2V 35V Adjustable Power Supply Using LM2576-ADJ Step Down DC-DC Converter (6) 1.2V 35V Adjustable Power Supply Using LM2576-ADJ Step Down DC-DC Converter (4) 1.2V 35V Adjustable Power Supply Using LM2576-ADJ Step Down DC-DC Converter (5) 1.2V 35V Adjustable Power Supply Using LM2576-ADJ Step Down DC-DC Converter (3) 1.2V 35V Adjustable Power Supply Using LM2576-ADJ Step Down DC-DC Converter (2) 1.2V 35V Adjustable Power Supply Using LM2576-ADJ Step Down DC-DC Converter (1)

1.2V To 57V 2Amp Adjustable Power Supply Using LM2576HV-ADJ

1.2V to 57V 3Amps Output Adjustable Power Supply Using LM2576HV-ADJ (1)

1.2V to 57V Adjustable DC-DC Converter project has been design around TI’s  LM2576-ADJ IC. Inputs supply 60 VDC.  LM2576HV-ADJ is a monolithic integrated circuit that provides all the active functions for step down switching regulator, capable of driving 2A load with excellent line and load regulation. This board has minimum number of components.

Features

  • Output 1.2 to 57 VDC @ 2 A regulated low ripple DC voltage
  • Onboard potentiometer for output voltage adjust
  • Onboard bridge rectifier for AC voltage input
  • LED indication at input
  • Screw Terminal connectors for input and output
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 70 mm x 63 mm

 

Applications

  • Small Bench Top Power Supplies
  • Battery Chargers
  • LED Drivers

 

1.2V to 57V 3Amps Output Adjustable Power Supply Using LM2576HV-ADJ (3) 1.2V to 57V 3Amps Output Adjustable Power Supply Using LM2576HV-ADJ (2) 1.2V to 57V 3Amps Output Adjustable Power Supply Using LM2576HV-ADJ (1)

1 Cell ( One AA Battery ) To 5V @ 1A Step Up DC-DC Converter Using MAX1703

1 Cell-Battery to 5V Step Up DC-DC Converter Using MAX1703 (1)

The DC-DC converter board has been designed around MX1703 IC from Maxim. The MAX1703 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. It uses a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate a 5V output from battery inputs, such as one to three NiCd/NiMH cells or one Li-Ion cell. The device includes a 2A, 75mΩ, N-channel MOSFET switch and a 140mΩ, P-channel synchronous rectifier.

With its internal synchronous rectifier, the MAX1703 delivers up to 5% better efficiency than similar nonsynchronous converters. It also features a pulse-frequency-modulation (PFM) low-power mode to improve efficiency at light loads, and a 1µA shutdown mode.

The MAX1703 comes in a 16-pin narrow SO package and includes an uncommitted comparator that generates a power-good or low-battery-warning output. It also contains a linear gain block that can be used to build a linear regulator.

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Key Features

  • Input Supply 1 Cell AA Battery
  • Output 5V DC
  • Up to 95% Efficiency
  • Up to 1A Output
  • Low-Power Mode (300µW)
  • Low-Noise, Constant-Frequency Mode (300kHz)

Applications

  • Digital Cordless Phones
  • Handheld Instruments (PDAs, Palmtops)
  • Palmtop Computers
  • PCS Phones
  • Personal Communicators
  • Two-Way Paging
  • Wireless Handsets

 

1 Cell-Battery to 5V Step Up DC-DC Converter Using MAX1703 (2) 1 Cell-Battery to 5V Step Up DC-DC Converter Using MAX1703 (1) 1 Cell-Battery to 5V Step Up DC-DC Converter Using MAX1703 (3)