UCD8220-Q1 Datasheet, PDF (1/29 Pages) Texas Instruments – DIGITALLY MANAGED PUSH-PULL ANALOG PWM CONTROLLERS

UCD8220-Q1
www.ti.com
SLUSB36A – JUNE 2012 – REVISED JUNE 2012
DIGITALLY MANAGED PUSH-PULL ANALOG PWM CONTROLLERS
Check for Samples: UCD8220-Q1
FEATURES
1
•2 AEC-Q100 Qualified With the Following
Results:
– Device Temperature Grade 1: –40°C to
125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• 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
APPLICATIONS
• Digitally Managed Switch Mode Power
Supplies
• Push-Pull, Half-Bridge, or Full-Bridge
Converters
• Battery Chargers
DESCRIPTION
The UCD8220-Q1 analog pulse-width modulator
device is used in digitally managed power supplies
using a microcontroller or the TMS320 DSP family.
UCD8220-Q1 is a double-ended PWM controller
configured with push-pull drive logic.
Systems using the UCD8220-Q1 device close the
PWM feedback loop with traditional analog methods,
but the UCD8220-Q1 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.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
TMS320, TrueDrive, PowerPAD are trademarks of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated