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.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | UCD8220 Digitally Managed Push-Pull Analog PWM Controllers 数据表 (Rev. E) | PDF | HTML | 2020-1-29 | ||
| * | 用户指南 | 200-VA HF Inverter Design Based on UCD8220 and MSP430G2330 for Automotive Applications | 2013-3-7 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
TIDA-00122 — 汽车 200VA 高频逆变器设计
此设计展示了一款基于 TI MSP430 和 UCD8220 数字管理推挽式控制器的低成本、小尺寸、稳健的 200VA 直流转交流逆变器。该设计主要面向汽车逆变器及商用领域的小型逆变器。在此设计中，UCD8220 用于升压级，将 12V 电池的电压提升至 250V 直流。MSP430 充当主机控制器，为 UCD8220 提供 100kHz 时钟信号并驱动输出直流-交流电桥。该逆变器的峰值效率为 90%，具有自然冷却功能，无需风扇进行冷却。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
订购和质量
推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。