DC2067A is a synchronous inverting DC/DC converter demonstration circuit based on LT8710 controller. It regulates a -5V, 6A output from a 4.5V to 28V input source, and operates at 300kHz switching frequency. The LT8710 features simple negative or positive output voltage programming. The DC2067 programs a -5V output with a single resistor. At light load, the LT8710 can operate at forced continuous conduction mode (CCM) or discontinuous conduction mode (DCM), set by its MODE pin. The DC2067A selects DCM, which maintains high efficiency at light load. The DC2067A can be modified from a CUK converter to other topology. Synchronous SEPIC and synchronous BOOST schematics are provided in the data sheet. Please consult the factory or LT8710 data sheet for details regarding how to customize the DC2067A or how to design different topologies for custom specifications. There are some optional components on the DC2067A to facilitate modifications. See Full Schematic Diagram for component designation.
The DC2067A is a demonstration circuit featuring the LT8710 switching controller, operating as a synchronous inverting converter with a CUK topology. It regulates a -5V, 6A output from a 4.5V to 28V input source and operates at a 300kHz switching frequency. The circuit allows for simple output voltage programming using a single resistor and can operate in forced continuous conduction mode (CCM) or discontinuous conduction mode (DCM) based on the MODE pin setting.
| Input Voltage | 4.5V to 28V |
|---|---|
| Output Voltage | -5V |
| Maximum Output Current | 6A |
| Output Voltage Ripple | 25 mV P-P |
| Typical Switching Frequency | 300 kHz |
| Efficiency (VIN=5V, IOUT=6A) | 85% |
The DC2067A operates at a typical switching frequency of 300kHz.
Yes, the DC2067A programs a -5V output with a single resistor.
Optional components include N-FET or P-FET for power delivery, RC snubber for feedback loop damping, and input/output capacitors to reduce voltage ripple.