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Digitally Assisted Push Pull PWM Controller


Package | PIN: PWP | 16
Temp: S (-40 to 105)
Carrier: Partial Tube
Qty Price
1-9 $4.14
10-24 $3.72
25-99 $3.47
100-249 $3.04
250-499 $2.85
500-749 $2.42
750-999 $2.04
1000+ $1.95


  • 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
    • Digitally Managed Switch Mode Power Supplies
    • Push-Pull, Half-Bridge, or Full-Bridge
    • Battery Chargers

PowerPAD Is a trademark of Texas InstrumentS

Texas Instruments  UCD8220PWP

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.