一种FPWM中削减负向电感电流的电路
By introducing a mirror unit, a comparator unit, a discharge unit, and a shaping unit into the FPWM circuit, and using a soft-start signal and a reference voltage control, the oscillation frequency is increased, solving the problem of excessive negative inductor current in the FPWM circuit, and achieving stable release of inductor current and stable output voltage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SG MICRO CORP
- Filing Date
- 2021-12-21
- Publication Date
- 2026-07-17
AI Technical Summary
Existing FPWM circuits have problems such as excessive negative inductor current amplitude during startup, leading to latch-up effects, and the existing methods increase the risk of damage to the DC-DC converter.
The output is generated under the control of the soft-start signal and the reference voltage. The soft-start signal is coupled to the oscillator of the FPWM to increase the oscillation frequency and reduce the amplitude of the negative inductor current. The working mode is switched by using a mirror unit, a comparator unit, a discharge unit and a shaping unit.
This effectively reduces the amplitude of the negative inductor current, avoids the risk of damage caused by the accumulation of large amounts of inductor current, and ensures the stability of the output voltage.
Smart Images
Figure CN116317565B_ABST