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Digitally assisted push pull PWM controller

Inventory: 4,705

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-2-260C-1 YEAR
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View

Packaging information

Package | Pins Package qty | Carrier Operating temperature range (°C)
HTSSOP (PWP) | 16 90 | TUBE
-40 to 105
Package | Pins HTSSOP (PWP) | 16
Package qty | Carrier 90 | TUBE
Operating temperature range (°C) -40 to 105
View TI packaging information

Features for the 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

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Description for the UCD8220

The UCD8220 analog pulse-width modulator (PWM) device isused in digitally managed power supplies using a microcontroller or the TMS320 DSP family.

The UCD8220 device is a double-ended PWM controllerconfigured with push-pull drive logic.

Systems using the UCD8220 device close the PWM feedbackloop with traditional analog methods, but the UCD8220 controllerincludes circuitry to interpret a time-domain digital pulse train. The pulse train contains theoperating frequency and maximum duty cycle limit which are used to control the power supplyoperation. The device circuitry eases implementation of a converter with high level controlfeatures without the added complexity or possible PWM resolution limitations of closing the controlloop in the discrete time domain.

The UCD8220 device can be configured for either peakcurrent mode or voltage mode control. The device provides a programmable current-limit function anda digital output current-limit flag which can be monitored by the host controller to set thecurrent limit operation. For fast switching speeds, the output stage uses the TrueDrive outputcircuit architecture, which delivers rated current of ±4-A into the gate of a MOSFET. Finally thedevice also includes a 3.3-V, 10-mA linear regulator to provide power to the digital controller oract as a reference in the system.

The UCD8220 controller is compatible with the standard3.3-V I/O ports of UCD9K digital power controllers, DSPs, microcontrollers, or ASICs and is offeredin the PowerPAD™ integrated circuit package HTSSOP.


Qty Price (USD)
1-99 3.466
100-249 3.037
250-999 2.13
1,000+ 1.716