UCD8220
- For digitally managed power supplies using µCs or the TMS320 ™ DSP family
- Voltage or peak current mode control with cycle-by-cycle current limiting
- Clock input from digital controller to set operating frequency and max duty cycle
- Analog PWM comparator
- 2-MHz switching frequency
- 110-V input startup circuit and thermal shutdown (UCD8620)
- Internal programmable slope compensation
- 3.3-V, 10-mA linear regulator
- DSP/µC compatible inputs
- Dual ±4-A TrueDrive™ integrated circuit high current drivers
- 10-ns typical rise and fall times with 2.2-nF
- 25-ns input-to-output propagation delay
- 25-ns current sense-to-output propagation delay
- Programmable current-limit threshold
- Digital output current-limit flag
- 4.5-V to 15.5-V supply voltage range
- Rated from –40°C to 105°C
The UCD8220 analog pulse-width modulator (PWM) device is used in digitally managed power supplies using a microcontroller or the TMS320 DSP family.
The UCD8220 device is a double-ended PWM controller configured with push-pull drive logic.
Systems using the UCD8220 device close the PWM feedback loop with traditional analog methods, but the UCD8220 controller includes circuitry to interpret a time-domain digital pulse train. The pulse train contains the operating frequency and maximum duty cycle limit which are used to control the power supply operation. The device circuitry eases implementation of a converter with high level control features without the added complexity or possible PWM resolution limitations of closing the control loop in the discrete time domain.
The UCD8220 device can be configured for either peak current mode or voltage mode control. The device provides a programmable current-limit function and a digital output current-limit flag which can be monitored by the host controller to set the current limit operation. For fast switching speeds, the output stage uses the TrueDrive output circuit architecture, which delivers rated current of ±4-A into the gate of a MOSFET. Finally the device also includes a 3.3-V, 10-mA linear regulator to provide power to the digital controller or act as a reference in the system.
The UCD8220 controller is compatible with the standard 3.3-V I/O ports of UCD9K digital power controllers, DSPs, microcontrollers, or ASICs and is offered in the PowerPAD™ integrated circuit package HTSSOP.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | UCD8220 Digitally Managed Push-Pull Analog PWM Controllers datasheet (Rev. E) | PDF | HTML | 2020/1/29 | ||
| * | 使用指南 | 200-VA HF Inverter Design Based on UCD8220 and MSP430G2330 for Automotive Applications | 2013/3/7 |
設計與開發
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TIDA-00122 — 車用 200VA 高頻逆變器設計
此設計展現低成本、小尺寸、穩健的 200VA DC 至 AC 逆變器，以 TI 的 MSP430 與 UCD8220 數位管理推挽式控制器為基礎。其目標用途為商業應用的車用逆變器與小型區段逆變器。在此設計中，UCD8220 用於升壓級，可從 12V 電池取得 250V DC。MSP430 可做為主機控制器，為 UCD8220 提供 100kHz 時鐘，並驅動輸出 DC-AC 橋接器。此逆變器的峰值效率為 90%，且具有自然冷卻功能，不需要風扇進行冷卻。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。