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Solutions Search - Constant Current / Constant Voltage Regulation

DC780B - LT1618 Demo Board | CC/CV Boost, 3.3V ≤ VIN ≤ 4.2V, Vout = 12V@250mA(CV) or 3.5V@500mA(CC)

Jul 25th 2016
Demonstration circuit 780B is a Constant-Current Constant- Voltage 1.4MHz Step-up DC/DC Converter featuring the LT ® 1618. DC780B demonstrates a general purpose Boost converter with a 12V, 250mA output from a 3.3V-4.2V source. The demo board can also be used as an LED driver, where a Luxeon LED (not installed), is driven ...

Demo Board 


LT1618 USB to 12V Boost Converter (with Selectable 100mA/500mA Input Current Limit)

Sep 12th 2014
The LT1618 step-up DC/DC converter combines a traditional voltage feedback loop and a unique current feedback loop to operate as a constant-current, constant-voltage source. This fixed frequency, current mode switcher operates from a wide input voltage range of 1.6V to 18V, and the high switching frequency of 1.4MHz permits ...

Circuit LTspice 


Doubling the LTC4120 Wireless Power Receiver for Higher Battery Charge Current

Andy Bishop - Design Engineer
Gabino Alonso - Strategic Marketing Engineer
Aug 27th 2014
The LTC4120 is a constant-current/constant-voltage wireless receiver and battery charger. The charge current is programmed up to 400mA with an external resistor. If more than 400mA is required, then use two LTC4120 devices operating in parallel as shown in this schematic. In this case the two LTC4120 operate from one transmitter ...

Blog Post Circuit LTspice 


LT3796 SEPIC LED Driver with 100:1 Analog Dimming

Aug 25th 2014
The LT®3796/LT3796-1 are DC/DC controllers designed to regulate a constant-current or constant-voltage and are ideal for driving LEDs. The fixed frequency and current mode architecture result in stable operation over a wide range of supply and output voltages. Two ground referred voltage FB pins serve as the input for several ...

Circuit LTspice 


LTC3225 5V Supercapacitor Back-Up Supply

Aug 7th 2014
The LTC3225/LTC3225-1 are programmable supercapacitor chargers designed to charge two supercapacitors in series to a selectable fixed output voltage (4.8V/5.3V for the LTC3225 and 4V/4.5V for the LTC3225-1) from input supplies as low as 2.8V to 5.5V. Automatic cell balancing prevents overvoltage damage to either supercapacitor. ...

Circuit LTspice 


LT3763: 70W, Solar Energy Harvester with Maximum Power Point Regulation

Oct 9th 2012
The LT3763 is a fixed frequency, synchronous, step-down DC/DC controller designed to accurately regulate output currents up to 20A. The average current mode control- ler will maintain inductor current regulation over a wide output voltage range from 0V to 55V. Output current is set by analog voltages on the CTRL pins and an ...

Circuit LTspice 


DC1696A - LTM8026 Demo Board | CVCC Buck uModule, 6V ≤ VIN ≤ 36V, Vout = 3.3V @ 5A

Feb 21st 2012
Demonstration circuit 1696 is a 36V, 5A, CVCC step-down μModule regulator featuring the LTM8026. The demo circuit is designed for a 3.3V output from an input voltage range of 6V to 36V. The output can source 5A. The circuit can be operated in either constant voltage mode or constant current mode. ...

Demo Board LTspice 


LTC3783: Single Inductor Buck-Boost LED Driver with Analog and PWM Dimming

Dec 15th 2005
The LTC3783 is a current mode LED driver and boost, flyback and SEPIC controller that drives both an N-channel power MOSFET and an N-channel load PWM switch. When using an external load switch, the PWMIN input not only drives PWMOUT, but also enables controller GATE switching and error amplifier operation, allowing the controller ...

Circuit LTspice