UCC28704
- Efficiency Performance Exceeds DoE Level VI and EU CoC V5 Tier-2 External Power Supply Standards
- Primary-Side Regulation Eliminates Opto-Coupler and Secondary Feedback Components
- Compatible with Synchronous Rectifier
- Enables <30-mW No-Load Input Power
- ±5% Output Voltage (CV) and Current (CC) Regulation
- Enhanced Dynamic Load Response
- Constant Current Output Under-Voltage Protection (CCUV) with Auto-Restart Response
- Cable Compensation (300 mV at 5-V Full Load)
- 85-kHz Maximum Switching Frequency
- DCM Valley-Switching Operation
- Clamped Gate-Drive Output for MOSFET
- NTC Resistor Interface
- Resistor or External HV Depletion-Mode FET Start-Up
- Fault Protections: Input Low Line, Output Over-Voltage, Over-Current, and Short-Circuit
- SOT23-6 Package
The UCC28704 Off-line flyback controller is a highly integrated, 6-pin primary-side regulated PWM controller for designing high efficiency AC-to-DC power supplies with low standby power consumption to comply with global efficiency standards. The controller has ultra-low current consumption at start-up to enable designs with <30-mW no-load input power and save standby mode energy consumption. Intelligent primary-side sensing and control enables 5% output voltage and current control without using an opto coupler or secondary-side feedback circuits.
UCC28704 incorporates an enhanced load transient response technique which helps minimize the output capacitor, reducing the overall system size and cost. The controller also eliminates the need for loop compensation components which simplify the design and debugging process for power supply designers. The converter output voltage and current is regulated to prevent overstress conditions that may damage the load or connectors. Similarly, the CCUV shutdown feature monitors for an output under voltage fault to protect connectors from over heat or burn out from soft shorts, which greatly enhance overall system reliability. Board or component over temperature protection is facilitated with an NTC interface pin.
UCC28704 can be readily used with TI secondary-side synchronous rectifier (SR) controllers at 2-A or higher output current levels for higher conversion efficiency or more compact designs.
For all available packages, see the orderable addendum at the end of the datasheet.技術資料
設計および開発
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UCC28704EVM-724 — UCC28704 USB 電源アダプタ向け PSR（一次側レギュレーション）付き 5V/10W オフライン電源の評価モジュール
The UCC28704EVM-724 is a 10-W off-line isolated power supply providing 5-V output on a USB-A port. The converter output voltage and current are regulated to 5% accuracy without using an optocoupler or secondary-side feedback circuits. The EVM demonstrates a low-cost solution to comply with (...)
多くの TI リファレンス デザインには、UCC28704 があります。
TI のリファレンス デザイン セレクション ツールを使用すると、開発中のアプリケーションやパラメータとの適合度が最も高いデザインの確認と特定を進めることができます。
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| SOT-23 (DBV) | 6 | Ultra Librarian |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 使用原材料
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点