ADP1071-1/ADP1071-2

Data Sheet

Rev. B | Page 2 of 27

TABLE OF CONTENTS

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

 

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

 

Functional Block Diagram .............................................................. 1

 

General Description ......................................................................... 1

 

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

 

Specifications..................................................................................... 3

 

Insulation and Safety Related Specifications ............................ 6

 

Regulatory Information............................................................... 7

 

Absolute Maximum Ratings............................................................ 8

 

Thermal Resistance ...................................................................... 8

 

ESD Caution.................................................................................. 8

 

Pin Configurations and Function Descriptions ........................... 9

 

Typical Performance Characteristics ........................................... 12

 

Theory of Operation ...................................................................... 14

 

Detailed Block Diagram ............................................................ 15

 

Primary Side Supply, Input Voltage, and LDO........................... 16

 

Secondary Side Supply and LDO ............................................. 16

 

Precision Enable ......................................................................... 16

 

Soft Start Procedure ................................................................... 17

 

Output Voltage Sensing and Feedback .................................... 18

 

Loop Compensation and Steady State Operation .................. 18

 

Slope Compensation .................................................................. 18

 

Input/Output Current-Limit Protection..................................... 18

 

Temperature Sensing ................................................................. 19

 

Frequency Setting (RT Pin) ...................................................... 19

 

Maximum Duty Cycle ............................................................... 19

 

Frequency Synchronization ...................................................... 19

 

Synchronous Rectifier (SR) Driver .......................................... 20

 

Output Overvoltage Protection (OVP) ................................... 20

 

SR Dead Time ............................................................................. 20

 

Light Load Mode (LLM) and Continuous Conduction Mode

(CCM).......................................................................................... 20

 

Soft Stop....................................................................................... 21

 

OCP/Feedback Recovery .......................................................... 21

 

Output Voltage Tracking ........................................................... 21

 

Remote System Reset ................................................................. 21

 

OCP Counter .............................................................................. 22

 

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

 

Insulation Lifetime ..................................................................... 23

 

Layout Guidelines....................................................................... 24

 

Applications Information .............................................................. 25

 

Typical Application Circuits ..................................................... 25

 

Outline Dimensions ....................................................................... 26

 

Ordering Guide .......................................................................... 27

 

REVISION HISTORY

4/2019—Rev. A to Rev. B

Added 44-Terminal LGA Section.....................................Universal

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

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

Change to Regulatory Information Section .................................. 7

Added Table 3 Title and Table 4; Renumbered Sequentially ........... 7

Changes to Table 6 and Table 7....................................................... 8

Added Table 8.................................................................................... 8

Change to Figure 2 Caption, Figure 3 Caption, and

Table 9 Title ....................................................................................... 9

Added Figure 4; Renumbered Sequentially, Figure 5, and

Table 10 ............................................................................................ 10

Changes to Insulation Lifetime Section....................................... 23

Updated Outline Dimensions ....................................................... 26

Changes to Ordering Guide .......................................................... 27

11/2018—Rev. 0 to Rev. A

Changes to Frequency Setting (RT Pin) Section ........................ 17

9/2018—Revision 0: Initial Version