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UCC28720反激式電源控制器在不使用光耦合器的情況下可提供隔離輸出恒定電壓(CV)和恒定電流(CC)輸出穩壓。此器件處理來自初級電源開關和一個輔助反激式繞組的信息以實現對輸出電壓和電流的精確控制。
一個內部700V啟動開關,動態控制的工作狀態和一個定制的調制配置文件在不犧牲啟動時間或輸出瞬態響應的同時支持超低待機功耗。
UCC28720中的控制算法使得運行效率滿足或者超過適用標準。輸出驅動接至一個雙極晶體管電源開關。帶有谷值開關的斷續傳導模式(DCM)減少了開關損耗。開關頻率的調制和初級電流峰值振幅(FM和AM)在整個負載和線路范圍內保持較高的轉換效率。
此控制器有一個80kHz的最大開關頻率并且一直保持對變壓器內峰值初級電流的控制。保護特性有助于抑制初級和次級應力分。UCC28720可由一個外部電阻器設定為對電纜中的壓降進行補償。
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Control Method |
Duty Cycle (Max) (%) |
Frequency (Max) (kHz) |
UVLO Thresholds On/Off (V) |
Features |
Operating Temperature Range (C) |
Package Group |
Rating |
Package Size: mm2:W x L (PKG) |
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UCC28720 | UCC28700 | UCC28701 | UCC28702 | UCC28703 | UCC28704 | UCC28710 | UCC28711 | UCC28722 | UCC28740 | UCC28742 |
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Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? |
99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? |
80 ? ? | 132 ? ? | 132 ? ? | 132 ? ? | 132 ? ? | 85 ? ? | 100 ? ? | 100 ? ? | 80 ? ? | 100 ? ? | 105 ? ? |
21/7.7 ? ? | 21/8.1 ? ? | 21/8.1 ? ? | 21/8.1 ? ? | 21/8.1 ? ? | 21/7.7 ? ? | 21/8 ? ? | 21/8 ? ? | 21/7.7 ? ? | 21/7.75 ? ? | 22/7.7 ? ? |
PSR HV Start-up BJT Switch Adjustable CBC CV/CC Control DCM Current Limiting Green Mode HV Start-up Input Line Monitor Leading Edge Blanking Light Load Efficiency Low Power Soft Start Smart Meters Compatible IoT Compatible Power Delivery Compatible ? ? | PSR Adjustable CBC CV/CC Control DCM Power Delivery Compatible ? ? | PSR NTC Configurable CV/CC Control DCM Power Delivery Compatible ? ? | PSR Fixed CBC NTC Configurable CV/CC Control DCM ? ? | PSR Fixed CBC NTC Configurable CV/CC Control DCM ? ? | PSR HV Start-up Configurable Fixed CBC NTC Configurable CV/CC Control DCM USB Type-C Compatible IoT Compatible Power Delivery Compatible ? ? | PSR HV Start-up Adjustable CBC CV/CC Control DCM Green Mode Input Line Monitor Leading Edge Blanking Light Load Efficiency Low Power Soft Start Smart Meters Compatible IoT Compatible Power Delivery Compatible ? ? | PSR HV Start-up NTC Configurable CV/CC Control DCM Green Mode Input Line Monitor Leading Edge Blanking Light Load Efficiency Low Power Soft Start Smart Meters Compatible IoT Compatible Power Delivery Compatible ? ? | PSR BJT Switch Adjustable CBC CV/CC Control DCM Smart Meters Compatible IoT Compatible Power Delivery Compatible ? ? | SSR HV Start-up CV/CC Control DCM Smart Meters Compatible IoT Compatible USB Type-C Compatible Power Delivery Compatible ? ? | SSR DCM Smart Meters Compatible IoT Compatible Power Delivery Compatible ? ? |
-40 to 125 ? ? | -20 to 125 ? ? | -20 to 125 ? ? | -20 to 125 ? ? | -20 to 125 ? ? | -40 to 125 ? ? | -40 to 125 ? ? | -40 to 125 ? ? | -40 to 125 ? ? | -40 to 125 ? ? | -40 to 125 ? ? |
SOIC ? ? | SOT-23 ? ? | SOT-23 ? ? | SOT-23 ? ? | SOT-23 ? ? | SOT-23 ? ? | SOIC ? ? | SOIC ? ? | SOT-23 ? ? | SOIC ? ? | SOT-23 ? ? |
Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? |
7SOIC: 29 mm2: 6 x 4.9(SOIC) ? ? | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) ? ? | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) ? ? | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) ? ? | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) ? ? | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) ? ? | 7SOIC: 29 mm2: 6 x 4.9(SOIC) ? ? | 7SOIC: 29 mm2: 6 x 4.9(SOIC) ? ? | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) ? ? | 7SOIC: 29 mm2: 6 x 4.9(SOIC) ? ? | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) ? ? |