ZHCSD93A january 2015 – december 2020 UCC28700-Q1
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Applications and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Transformer Parameter Verification
- 8.2.2.2 Output Capacitance
- 8.2.2.3 VDD Capacitance, CDD
- 8.2.2.4 VDD Start-Up Resistance, RSTR
- 8.2.2.5 VS Resistor Divider, Line Compensation, and Cable Compensation
- 8.2.2.6 Input Bulk Capacitance and Minimum Bulk Voltage
- 8.2.2.7 Transformer Turns Ratio, Inductance, Primary-Peak Current
- 8.2.2.8 Standby Power Estimate
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
-
11Device and Documentation Support
- 11.1
Device Support
- 11.1.1
Device Nomenclature
- 11.1.1.1 Capacitance Terms in Farads
- 11.1.1.2 Duty Cycle Terms
- 11.1.1.3 Frequency Terms in Hertz
- 11.1.1.4 Current Terms in Amperes
- 11.1.1.5 Current and Voltage Scaling Terms
- 11.1.1.6 Transformer Terms
- 11.1.1.7 Power Terms in Watts
- 11.1.1.8 Resistance Terms in Ω
- 11.1.1.9 Timing Terms in Seconds
- 11.1.1.10 Voltage Terms in Volts
- 11.1.1.11 AC Voltage Terms in VRMS
- 11.1.1.12 Efficiency Terms
- 11.1.1
Device Nomenclature
- 11.2 Documentation Support
- 11.3 Trademarks
- 11.1
Device Support
- Mechanical, Packaging, and Orderable Information
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
- DBV|6
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
8.2.2.6 Input Bulk Capacitance and Minimum Bulk Voltage
Determine the minimum voltage on the input capacitance, CB1 and CB2 total, in order to determine the maximum Np to Ns turns ratio of the transformer. The input power of the converter based on target full-load efficiency, minimum input RMS voltage, and minimum AC input frequency are used to determine the input capacitance requirement.
Maximum input power is determined based on VOCV, IOCC, and the full-load efficiency target.
The below equation provides an accurate solution for input capacitance based on a target minimum bulk capacitor voltage. To target a given input capacitance value, iterate the minimum capacitor voltage to achieve the target capacitance.
