Datasheet ADP1074 (Analog Devices) - 6

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ADP1074 Data Sheet Parameter Symbol Test Conditions/Comments Min Typ Max Unit
Overcurrent Protection (OCP) 40 ns Comparator Delay Time in OCP Before Entering 1.5 ms Hiccup Mode OCP Hiccup Time See Input/Output Current-Limit Protection 40 ms section FB PIN AND ERROR AMPLIFIER Feedback Accuracy Voltage VFB TJ = −40°C to +85°C 1.2 − 0.85% +1.2 1.2 + 0.85% V TJ = −40°C to +125°C 1.2 − 1.25% +1.2 1.2 + 1.25% V Temperature Coefficient 76 ppm/°C FB Input Bias Current −100 +1 +100 nA Transconductance gm 230 250 270 µA/V Output Current Clamp Minimum −57 µA Maximum 43 µA COMP Clamp Voltage Minimum 20 μA sinking current from COMP pin 0.7 V Maximum 20 μA sourcing current to COMP pin 2.52 V Open-Loop Gain 80 dB Output Shunt Resistance 5 GΩ Gain Bandwidth Product 1 MHz PRECISION ENABLE THRESHOLD EN Threshold VEN EN rising 1.14 1.2 1.26 V EN Hysteresis VEN < 1.2 V 4 µA VEN > 1.2 V 1 µA EN Hysteresis Current 3 µA MODE PIN Light Load Mode Current Connect a resistor from MODE to AGND2 6 6.5 7 µA Source Hysteresis 24 40 60 mV TEMPERATURE Thermal Shutdown 155 °C Hysteresis −15 °C SOFT START SS1 AND SS2 PINS Primary Side SS1 Current During soft start only 9.1 µA Source Secondary Side SS2 Current During soft start only, post handover 20 µA Source SS2 Discharging Current During a fault condition or soft stop 30 µA SYNC PIN Synchronization Range 100 600 kHz Input Pulse Width 100 ns Number of Cycles Before 7 Cycles Synchronization Input Voltage Low 0.4 V High 3 V Leakage Current 1 μA iCOUPLER DELAY COMP Signal Delay Through 600 ns iCoupler Rev. C | Page 6 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