PowerPAD Is a trademark of Texas InstrumentS
DescriptionThe UCD8220PWP analog pulse-width modulator device is used in digitally managed power supplies using a microcontroller or the TMS320? DSP family.
UCD8220PWP ia a double-ended PWM controller configured with push-pull drive logic.
Systems using the UCD8220PWP device close the PWM feedback loop with traditional analog methods, but the UCD8220PWP 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. Thiseases 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.
Feature
- For Digitally Managed Power Supplies Using μCs or the TMS320?:DSP Family
- Voltageor 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
DescriptionThe 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. Thiseases 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.
