ADP1074

Data Sheet

Rev. D | Page 2 of 32

TABLE OF CONTENTS

Features .............................................................................................. 1

 

Applications ...................................................................................... 1

 

Simplified Block Diagram ............................................................... 1

 

Revision History ............................................................................... 2

 

General Description ......................................................................... 3

 

Specifications .................................................................................... 4

 

Insulation and Safety Related Specifications............................ 7

 

Regulatory Information............................................................... 8

 

DIN V VDE V 0884-10 (VDE V 0884-10) Insulation

Characteristics .............................................................................. 9

 

DIN V VDE V 0884-10 (VDE V 0884-10) Insulation

Characteristics ............................................................................ 10

 

Absolute Maximum Ratings ......................................................... 11

 

Thermal Resistance .................................................................... 11

 

ESD Caution................................................................................ 11

 

Pin Configurations and Function Descriptions......................... 12

 

Typical Performance Characteristics........................................... 14

 

Theory of Operation ...................................................................... 16

 

Detailed Block Diagram ............................................................ 17

 

Primary Side Supply, Input Voltage, and LDO.......................... 18

 

Secondary Side Supply and LDO ............................................. 18

 

Precision Enable ......................................................................... 18

 

Soft Start Procedure ................................................................... 18

 

Output Voltage Sensing and Feedback ................................... 19

 

Loop Compensation and Steady State Operation ................. 19

 

Slope Compensation.................................................................. 20

 

Input/Output Current-Limit Protection.................................... 20

 

Temperature Sensing................................................................. 21

 

Frequency Setting (RT Pin) ...................................................... 21

 

Maximum Duty Cycle ............................................................... 21

 

Frequency Synchronization...................................................... 21

 

Synchronous Rectifier (SR) Drivers ........................................ 22

 

Output Overvoltage Protection (OVP)................................... 22

 

Active Clamp (PGATE) ............................................................ 22

 

Leading Edge Blanking.............................................................. 22

 

Gate Delay and SR Dead Time................................................. 22

 

Light Load Mode (LLM) and SR Phase In.............................. 22

 

External Start-Up Circuit.......................................................... 23

 

Soft Stop....................................................................................... 23

 

Power Good ................................................................................ 23

 

OCP/Feedback Recovery........................................................... 24

 

Output Voltage Tracking .......................................................... 24

 

Remote System Reset................................................................. 24

 

OCP Counter .............................................................................. 26

 

Insulation Lifetime..................................................................... 26

 

Layout Guidelines ...................................................................... 27

 

Typical Application Circuits......................................................... 28

 

Outline Dimensions....................................................................... 31

 

Ordering Guide .......................................................................... 31

 

REVISION HISTORY

6/2020—Rev. C to Rev. D

Changes to Ordering Guide.......................................................... 31

4/2020—Rev. B to Rev. C

Moved General Description Section.............................................. 3

Added Table 1; Renumbered Sequentially.................................... 3

8/2018—Rev. A to Rev. B

Changes to Table 1 ........................................................................... 3

Changes to Input/Output Current-Limit Protection Section.... 19

8/2018—Rev. 0 to Rev. A

Added CC-24-6 Package ..............................................Throughout

Changes to Features Section ........................................................... 1

Changes to Table 1 ........................................................................... 3

Changes to Table 2 ........................................................................... 6

Added Table 4; Renumbered Sequentially ....................................7

Changes to Table 3 ............................................................................7

Added DIN V VDE V 0884-10 (VDE V 0884-10) Insulation

Characteristics Section, Table 5, and Figure 2; Renumbered

Sequentially ........................................................................................8

Added DIN V VDE V 0884-10 (VDE V 0884-10) Insulation

Characteristics Section, Table 6, and Figure 3 ..............................9

Added Table 10............................................................................... 10

Changes to Table 8 and Table 9 ................................................... 10

Added Figure 5 ............................................................................... 11

Changes to Input/Output Current Limit Protection Section .. 19

Added Figure 15 ............................................................................. 20

Updated Outline Dimensions ...................................................... 30

Changes to Ordering Guide.......................................................... 30

10/2017—Revision 0: Initial Version