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UCC28700系列反激式電源控制器,此控制器在無需使用光耦合器的情況下提供恒定電壓(CV)和恒定電流(CC )輸出調(diào)節(jié)。此器件處理來自初級電源開關(guān)和一個輔助反激式繞組的信息以實現(xiàn)對輸出電壓和電流的精確控制。低啟動電流,動態(tài)控制運(yùn)轉(zhuǎn)狀態(tài)和一個定制的調(diào)制參數(shù)在不犧牲啟動時間
UCC28700系列中的控制算法使得運(yùn)行效率符合或者超過適用標(biāo)準(zhǔn)。輸出驅(qū)動接至一個MOSFET電源開關(guān)。帶有谷值<關(guān)鍵詞:開關(guān)頻率的調(diào)制和初級電流峰值振幅(FM和AM)在整個負(fù)載和線路范圍內(nèi)保持較高的轉(zhuǎn)換效率。
控制器有一個130kHz的最大開關(guān)頻率并且一直保持對變壓器內(nèi)初級峰值電流的控制。保護(hù)特性有助于保持控制中的初級和次級應(yīng)力分量UCC28701,UCC28702和UCC28703器件在提供固定線纜補(bǔ)償電平的同時使用一個負(fù)溫度系數(shù)(NTC)熱敏電阻實現(xiàn)遠(yuǎn)程溫度感測。
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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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UCC28703 | UCC28700 | UCC28701 | UCC28702 | UCC28704 | UCC28711 | UCC28720 | UCC28722 |
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Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? | Current ? ? |
99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? | 99 ? ? |
132 ? ? | 132 ? ? | 132 ? ? | 132 ? ? | 85 ? ? | 100 ? ? | 80 ? ? | 80 ? ? |
21/8.1 ? ? | 21/8.1 ? ? | 21/8.1 ? ? | 21/8.1 ? ? | 21/7.7 ? ? | 21/8 ? ? | 21/7.7 ? ? | 21/7.7 ? ? |
PSR Fixed CBC NTC Configurable CV/CC Control DCM ? ? | 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 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 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 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 BJT Switch Adjustable CBC CV/CC Control DCM Smart Meters Compatible IoT Compatible Power Delivery Compatible ? ? |
-20 to 125 ? ? | -20 to 125 ? ? | -20 to 125 ? ? | -20 to 125 ? ? | -40 to 125 ? ? | -40 to 125 ? ? | -40 to 125 ? ? | -40 to 125 ? ? |
SOT-23 ? ? | SOT-23 ? ? | SOT-23 ? ? | SOT-23 ? ? | SOT-23 ? ? | SOIC ? ? | SOIC ? ? | SOT-23 ? ? |
Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? |
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) ? ? |