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UCD8220-Q1 Datasheet Preview

UCD8220-Q1 Datasheet

Digitally Managed Push-Pull Analog PWM Controllers

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UCD8220-Q1
SLUSB36C – JUNE 2012 – REVISED JANUARY 2015
UCD8220-Q1 Digitally Managed Push-Pull Analog PWM Controllers
1 Features
1 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 2
– Device CDM ESD Classification Level C4B
• 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
2 Applications
• Automotive HEV/EV and Powertrain
• Digitally Managed Switch Mode Power Supplies
• Push-Pull, Half-Bridge, or Full-Bridge Converters
• Battery Chargers
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. The device circuitry 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.
The UCD8220-Q1 device can be configured for either
peak current mode or voltage mode control. The
device provides a programmable current-limit function
and a digital output current-limit flag which can be
monitored by the host controller to set the current
limit operation. For fast switching speeds, the output
stage uses the TrueDrive output circuit architecture,
which delivers rated current of ±4-A into the gate of a
MOSFET. Finally the device also includes a 3.3-V,
10-mA linear regulator to provide power to the digital
controller or act as a reference in the system.
The UCD8220-Q1 controller is compatible with the
standard 3.3-V I/O ports of UCD9K digital power
controllers, DSPs, microcontrollers, or ASICs and is
offered in the PowerPAD™ integrated circuit package
HTSSOP.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCD8220-Q1
HTSSOP (16)
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
UCD8220-Q1 Typical Simplified Push-Pull
Converter Application Schematic
UCD8220-Q1
3 Description
The UCD8220-Q1 analog pulse-width modulator
(PWM) device is used in digitally managed power
supplies using a microcontroller or the TMS320 DSP
family.
The UCD8220-Q1 device is a double-ended PWM
controller configured with push-pull drive logic.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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UCD8220-Q1 Datasheet Preview

UCD8220-Q1 Datasheet

Digitally Managed Push-Pull Analog PWM Controllers

No Preview Available !

UCD8220-Q1
SLUSB36C – JUNE 2012 – REVISED JANUARY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Timing Requirements ................................................ 6
6.7 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 12
7.1 Overview ................................................................. 12
7.2 Functional Block Diagram ....................................... 13
7.3 Feature Description................................................. 13
7.4 Device Functional Modes........................................ 17
8 Application and Implementation ........................ 18
8.1 Application Information............................................ 18
8.2 Typical Application ................................................. 18
9 Power Supply Recommendations...................... 22
10 Layout................................................................... 23
10.1 Layout Guidelines ................................................. 23
10.2 Layout Example .................................................... 23
10.3 Thermal Considerations ........................................ 24
11 Device and Documentation Support ................. 24
11.1 Documentation Support ........................................ 24
11.2 Trademarks ........................................................... 24
11.3 Electrostatic Discharge Caution ............................ 24
11.4 Glossary ................................................................ 24
12 Mechanical, Packaging, and Orderable
Information ........................................................... 24
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (July 2014) to Revision C
Page
• Added the following sections to the data sheet: Device Functional Modes, Application Information, Design
Requirements, Application Curves, Power Supply Recommendations, and Layout Example............................................... 1
• Changed the Handling Ratings table to ESD ratings and moved the storage temperature into the Absolute Maximum
Ratings table .......................................................................................................................................................................... 4
Changes from Revision A (June 2012) to Revision B
Page
• Updated the data sheet format to meet the new TI data sheet standards ............................................................................ 1
• Deleted VIN (input to internal start-up circuitry) from the Pin Functions table ...................................................................... 3
• Added the Clearing the Current-Limit Flag (CLF) section .................................................................................................... 17
Changes from Original (June 2012) to Revision A
Page
• Device went from preview to production ................................................................................................................................ 1
2
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Copyright © 2012–2015, Texas Instruments Incorporated
Product Folder Links: UCD8220-Q1


Part Number UCD8220-Q1
Description Digitally Managed Push-Pull Analog PWM Controllers
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