UCD8220 - 数字辅助推挽 PWM 控制器

UCD8220是TI德州仪器公司的一款数字电源隔离式控制器产品，UCD8220是数字辅助推挽 PWM 控制器，本站介绍了UCD8220的封装应用图解、特点和优点、功能等，并给出了与UCD8220相关的TI元器件型号供参考。

UCD8220 - 数字辅助推挽 PWM 控制器 - 数字电源隔离式控制器 - 数字电源控制解决方案 - 德州仪器

产品描述

The UCD8220 analog pulse-width modulator device is used in digitally managed power supplies using a microcontroller or the TMS320™ 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.

产品特性

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 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
- Battery Chargers

PowerPAD Is a trademark of Texas InstrumentS

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