UCD8220 数字辅助推挽 PWM 控制器
UCD8220 描述
The UCD8220 analog pulse-width modulator device is used in digitally managed power supplies using a microcontroller or the TMS320TM DSP family.
UCD8220 ia 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. This 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
|
UCD8220 |
| Control Method |
Current Mode,voltage Mode |
| Duty Cycle(Max)(%) |
96 |
| Frequency(Max)(kHz) |
2000 |
| PWM Outputs(#) |
2 |
| Topology |
Full-Bridge,Half-Bridge,Push-Pull |
| UVLO Thresholds On/Off(V) |
4.5/4.25 |
| Pin/Package |
16HTSSOP, 16QFN |
| Operating Temperature Range(°C) |
-40 to 105 |
UCD8220 特性
- For Digitally Managed Power Supplies Using uCs 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/uC Compatible Inputs
- Dual ±4-A TrueDrive 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
- APPLICATIONS
- Digitally Managed Switch Mode Power Supplies
- Push-Pull, Half-Bridge, or Full-Bridge
Converters
UCD8220 芯片订购指南
UCD8220 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| UCD8220PWP |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCD8220PWP |
UCD8220PWP |
| UCD8220PWPG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCD8220PWPG4 |
UCD8220PWPG4 |
| UCD8220PWPR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCD8220PWPR |
UCD8220PWPR |
| UCD8220PWPRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCD8220PWPRG4 |
UCD8220PWPRG4 |
UCD8220 应用技术支持与电子电路设计开发资源下载
- UCD8220 数据资料 dataSheet 下载.PDF
- TI 德州仪器Fusion Digital Power(TM) PWM 控制器产品选型与价格 . xls
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- 高速数据转换 (PDF 1967 KB)
UCD8220 相关工具