NTE7166
Integrated Circuit
Flyback Switching Regulator
Description:
The NTE7166 is an integrated circuit in a 5-Lead Staggered TO3P type package and is specifically
designed to satisfy the requirements for increased integration and reliability in off-line quasi-resonant
flyback converters. This device incorporates a primary control and drive circuit with discrete ava-
lanche-rated power MOSFETs.
Cycle-by-cycle current limiting, under-voltage lockout with hysteresis, over-voltage protection, and
thermal shutdown protects the power supply during th normal overload an fault conditions. Over-
voltge protection and thermal shutdown are latched after a short delay. The latch may be reset by cycl-
ing the input supply. Low-current startup and a low-power standby mode selected from the secon-
dary circuit completes a comprehensive suite of features.
Features:
D Flyback Operation with Quasi-Resonant Soft Switching for Low Power Dissipation and EMI
D Rugged Avalanche-Rated MOSFET
D Full Over-Current Protection (No Blanking)
D Under-Voltage Lockout with Hysteresis
D Over-Voltage Protection
D Direct Voltage Feedback
D Low Start-Up Current
D Low-Frequency, Low-Power Standby Operation
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Control Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
Drain-Source Voltage, VDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450V
Drain Switching Current, ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A
Peak Drain Current, IDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26A
Avalanche Energy, EAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327mJ
OCP/FB Voltage Range, VOCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V
Power Dissipation (VIN x IIN(ON)), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8W
FET Channel Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Internal Case Temperature, TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C
Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to +125°C
Thermal Resistance, Junction-to-Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.75°C/W