NTE7154 Control Circuit for Switch Mode Power Supplies using CMOS Transistors PDIP-8
Info as pdf-file
Description:
The NTE7154 is an integrated circuit in an 8-Lead DIP type package which controls the MOS power
transistor and performs all necessary regulation and monitoring functions in free running flyback converters.
Since good load regulation over a wide load range is attained, this device is particularly suitable
for consumer as well as industrial power supplies.
Features:
- Fold-Back Characteristic Provides Overload Protection for External Diodes
- Burst Operation Under Short-Circuit and No Load Conditions
- Loop Error Protection
- Switch-Off In Case of Too Low Line Voltage (Under Voltage Switch-Off)
- Line Voltage Compensation of Overload Point
- Soft-Start for Smooth Start-Up
- Chip Over-Temperature Protection (Thermal Shutdown)
- On-Chip Parasitic Transformer Oscillation Suppression Circuitry
- Decrease of Regulated Voltage for Low Power Consumption
Absolute Maximum Ratings:
Supply Voltage (Pin1), V1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +3.0V
Supply Voltage (Pin2, Pin3, Pin4, Pin7), V2, V3, V4, V7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V
Supply Voltage (Pin6), V6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +20V
Supply Current (Pin1, Pin2, Pin3, Pin7), I1, I2, I3, I7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3mA
Supply Current (Pin4, Note 1), I4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.5A
Supply Current (Pin5, Note 1), I5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to +1.5A
Supply Current (Pin6, Note 1), I6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A
Supply Current (Pin8), I8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -3 to +3mA
Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C
Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20° to +85°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to +125°C
Thermal Resistance, Junction-to-Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85°C/W
Thermal Resistance, Junction-to-Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45°C/W
Note 1. tp ≤ 50μs, V ≤ 0.1.
Pictures are a guide only actual product may vary. Subject to alterations and errors. Help us to eliminate errors:
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