Datasheet ADP1074 (Analog Devices) - 2

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ADP1074 Data Sheet TABLE OF CONTENTS
Features .. 1 Slope Compensation .. 20 Applications .. 1 Input/Output Current-Limit Protection .. 20 Simplified Block Diagram ... 1 Temperature Sensing ... 21 Revision History ... 2 Frequency Setting (RT Pin) .. 21 General Description ... 3 Maximum Duty Cycle ... 21 Specifications .. 4 Frequency Synchronization .. 21 Insulation and Safety Related Specifications .. 7 Synchronous Rectifier (SR) Drivers .. 22 Regulatory Information ... 8 Output Overvoltage Protection (OVP) ... 22 DIN V VDE V 0884-10 (VDE V 0884-10) Insulation Active Clamp (PGATE) .. 22 Characteristics .. 9 Leading Edge Blanking .. 22 DIN V VDE V 0884-10 (VDE V 0884-10) Insulation Gate Delay and SR Dead Time ... 22 Characteristics .. 10 Light Load Mode (LLM) and SR Phase In .. 22 Absolute Maximum Ratings ... 11 External Start-Up Circuit .. 23 Thermal Resistance .. 11 Soft Stop ... 23 ESD Caution.. 11 Power Good .. 23 Pin Configurations and Function Descriptions ... 12 OCP/Feedback Recovery ... 24 Typical Performance Characteristics ... 14 Output Voltage Tracking .. 24 Theory of Operation .. 16 Remote System Reset ... 24 Detailed Block Diagram .. 17 OCP Counter .. 26 Primary Side Supply, Input Voltage, and LDO.. 18 Insulation Lifetime ... 26 Secondary Side Supply and LDO ... 18 Layout Guidelines .. 27 Precision Enable ... 18 Typical Application Circuits ... 28 Soft Start Procedure ... 18 Outline Dimensions ... 31 Output Voltage Sensing and Feedback ... 19 Ordering Guide .. 31 Loop Compensation and Steady State Operation ... 19
REVISION HISTORY 4/2020—Rev. B to Rev. C
Changes to Table 3 .. 7 Moved General Description Section .. 3 Added DIN V VDE V 0884-10 (VDE V 0884-10) Insulation Added Table 1; Renumbered Sequential y .. 3 Characteristics Section, Table 5, and Figure 2; Renumbered Sequentially .. 8
8/2018—Rev. A to Rev. B
Added DIN V VDE V 0884-10 (VDE V 0884-10) Insulation Changes to Table 1 ... 3 Characteristics Section, Table 6, and Figure 3 .. 9 Changes to Input/Output Current-Limit Protection Section .. 19 Added Table 10 ... 10 Changes to Table 8 and Table 9 ... 10
8/2018—Rev. 0 to Rev. A
Added Figure 5 ... 11 Added CC-24-6 Package .. Throughout Changes to Input/Output Current Limit Protection Section .. 19 Changes to Features Section ... 1 Added Figure 15 ... 20 Changes to Table 1 ... 3 Updated Outline Dimensions .. 30 Changes to Table 2 ... 6 Changes to Ordering Guide .. 30 Added Table 4; Renumbered Sequential y .. 7
10/2017—Revision 0: Initial Version
Rev. C | Page 2 of 32 Document Outline FEATURES APPLICATIONS SIMPLIFIED BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY GENERAL DESCRIPTION SPECIFICATIONS INSULATION AND SAFETY RELATED SPECIFICATIONS REGULATORY INFORMATION DIN V VDE V 0884-10 (VDE V 0884-10) INSULATION CHARACTERISTICS DIN V VDE V 0884-10 (VDE V 0884-10) INSULATION CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION DETAILED BLOCK DIAGRAM PRIMARY SIDE SUPPLY, INPUT VOLTAGE, AND LDO SECONDARY SIDE SUPPLY AND LDO PRECISION ENABLE SOFT START PROCEDURE OUTPUT VOLTAGE SENSING AND FEEDBACK LOOP COMPENSATION AND STEADY STATE OPERATION SLOPE COMPENSATION INPUT/OUTPUT CURRENT-LIMIT PROTECTION TEMPERATURE SENSING FREQUENCY SETTING (RT PIN) MAXIMUM DUTY CYCLE FREQUENCY SYNCHRONIZATION SYNCHRONOUS RECTIFIER (SR) DRIVERS OUTPUT OVERVOLTAGE PROTECTION (OVP) ACTIVE CLAMP (PGATE) LEADING EDGE BLANKING GATE DELAY AND SR DEAD TIME LIGHT LOAD MODE (LLM) AND SR PHASE IN EXTERNAL START-UP CIRCUIT SOFT STOP POWER GOOD OCP/FEEDBACK RECOVERY OUTPUT VOLTAGE TRACKING REMOTE SYSTEM RESET OCP COUNTER INSULATION LIFETIME LAYOUT GUIDELINES TYPICAL APPLICATION CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE NOTES