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ADP1621-EVAL 数据表(PDF) 2 Page - Analog Devices

部件名 ADP1621-EVAL
功能描述  Constant-Frequency, Current-Mode Step-Up DC/DC Controller
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADP1621-EVAL 数据表(HTML) 2 Page - Analog Devices

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ADP1621
Rev. A | Page 2 of 32
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Typical Application Circuit ............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
Simplified Block Diagram ............................................................... 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Theory of Operation ...................................................................... 12
Control Loop............................................................................... 12
Current-Sense Configurations.................................................. 12
Current Limit .............................................................................. 13
Undervoltage Lockout ............................................................... 13
Shutdown..................................................................................... 13
Soft Start ...................................................................................... 13
Internal Shunt Regulators.......................................................... 13
Setting the Oscillator Frequency and Synchronization
Frequency .................................................................................... 13
Application Information: Boost Converter................................. 14
Duty Cycle ................................................................................... 14
Setting the Output Voltage........................................................ 14
Inductor Current Ripple............................................................ 14
Inductor Selection ...................................................................... 14
Input Capacitor Selection.......................................................... 15
Output Capacitor Selection....................................................... 15
Diode Selection........................................................................... 15
MOSFET Selection..................................................................... 16
Loop Compensation .................................................................. 16
Slope Compensation .................................................................. 17
Current Limit .............................................................................. 18
Light Load Operation ................................................................ 18
Recommended Component Manufacturers........................... 19
Layout Considerations................................................................... 20
Efficiency Considerations ............................................................. 21
Examples of Application Circuits................................................. 22
Standard Boost Converter—Design Example ........................ 22
Bootstrapped Boost Converter................................................. 23
SEPIC Converter Circuit ........................................................... 27
Low Voltage Power-Input Circuit ............................................ 27
LED Driver Application Circuits ............................................. 28
Related Parts.................................................................................... 30
Outline Dimensions ....................................................................... 31
Ordering Guide .......................................................................... 31
REVISION HISTORY
12/06—Rev.
0 to Rev. A
Changes to Table 1............................................................................ 3
Changes to Table 2............................................................................ 5
Added Table 3.................................................................................... 5
Changes to Table 5.......................................................................... 19
Changes to Ordering Guide .......................................................... 31
7/06—Revision 0: Initial Version


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