New Content (2)
Design NotesTwo Terminal Bipolar Power Supply
Features and Benefits
- Bipolar Output Cleanly Transitions Through 0V
- Output Can Source or Sink Current for Any Output Voltage
- CTRL Pin Externally Sets Output Voltage
- Wide Input Range: 4.5V to 80V
- Power Good Indication Pin (PG)
- Switching Frequency Up to 750kHz
- Can Be Synchronized to an External Clock
- High Gain EN Pin Accepts Slowly Varying Input Signals
- 20-Lead TSSOP Exposed Pad Package
The LT8714 is a synchronous PWM DC/DC controller designed for a four quadrant output converter. The output voltage cleanly transitions through zero volts with sourcing and sinking output current capability.
The LT8714 is ideal for regulating to positive, negative, or zero volts when configured for the novel four quadrant topology. Applications include four quadrant power supplies, high power bidirectional current sources, active loads, and high power, low frequency signal amplification. In addition, the LT8714 incorporates a power good feature to let the user know if VOUT is above or below its target regulation voltage.
The LT8714’s switching frequency range can be programmed between 100kHz and 750kHz via a resistor from the RT pin to GND. A SYNC pin is also provided if the user would like to synchronize the part to an external clock. Additional features such as current limiting and soft-start are included. The LT8714 is available in a 20‑lead TSSOP package.
- Four Quadrant Power Supplies
- Bidirectional Current Sources
- High Power, Low Frequency Signal Amplification
- Test and Measurement
- Electronic Window Tinting
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 2240A is a synchronous four quadrant converter featuring the LT8714 switching controller. The LT8714 can regulate to positive, negative, or zero volts when configured as a four-quadrant topology. The DC2240A regulates from a 10V to 14V input source to an adjustable output voltage from positive 5V to negative 5V with a 5A maximum current rating.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
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