ZHCSJL9B April 2019 – April 2019 TPS566235
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機(jī)械、封裝和可訂購信息
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RJN|13
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購信息
7.4.3 Advanced Eco-Mode™ Control
The advanced Eco-Mode™ control scheme to maintain high efficiency at light loads. As the output current decreases from heavy load conditions, the inductor current is also reduced and eventually comes to a point where the rippled valley touches zero level, which is the boundary between continuous conduction and discontinuous conduction modes. The low-side MOSFET is turned off when a zero inductor current is detected. As the load current further decreases, the converter runs into discontinuous conduction mode. The on-time is kept almost the same as it is in continuous conduction mode so that it takes more time to discharge the output to the level of reference voltage with a smaller load current. The light load current where the transition to Eco-Mode™ operation happens ( IOUT(LL) ) can be calculated from Equation 2.
After identifying the application requirements, design the output inductance (LOUT) so that the inductor peak-to-peak ripple current is approximately between 20% and 30% of the IOUT(max) (peak current in the application).