ZHCSJM5D September 2009 – April 2019 TPS61093
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機械、封裝和可訂購信息
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
- DSK|10
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
- DSK|10
訂購信息
8.2.1.2.5 Switch Duty Cycle
The maximum switch duty cycle (D) of the TPS61093 is 90% (minimum). The duty cycle of a boost converter under continuous conduction mode (CCM) is given by:
The duty cycle must be lower than the specification in the application; otherwise the output voltage cannot be regulated.
The TPS61093 has a minimum ON pulse width once the PWM switch is turned on. As the output current drops, the device enters discontinuous conduction mode (DCM). If the output current drops extremely low, causing the ON time to be reduced to the minimum ON time, the TPS61093 enters pulse-skipping mode. In this mode, the device keeps the power switch off for several switching cycles to keep the output voltage in regulation. See Figure 14. The output current when the IC enters skipping mode is calculated with Equation 4.
where
- Tmin_on = Minimum ON pulse width specification (typically 65-ns);
- L = Selected inductor value;
- fSW = Converter switching frequency (typically 1.2-MHz)