NTE7125 Datasheet, PDF (1/3 Pages) NTE Electronics – Integrated Circuit Switching Regulator

NTE7125 & NTE7126
Integrated Circuit
Switching Regulator
Description:
The NTE7125 and NTE7126 are integrated circuits in a 12–Lead SIP type package incorporating all
the power switching, amplifier, error detection, and overcurrent protection circuits required in a self–
extcitation type semi–regulated off–line switching regulator. As a result, these devices can be used
in the design of switching power supplies with a minimal number of external components. Further-
more, the adoption of MOSFET power switching elements supports a higher oscillation frequency
than possible with bi–polar transistors. This allows smaller pulse transformers and capacitors to be
used, making it possible to construct miniature power supply systems.
Features:
D Power MOSFET Devices
D Ideal for Semi–Regulated Control Switching Supplies
D Error Detection Circuit On–Chip (40.5V ±0.5V Set Refernce Voltage)
D Overcurrent Protection Circuit On–Chip
D Higher Oscillation Frequency allows the use of Smaller Pulse Transformers
D IMST Substrate acts as an Electromagnetic Shield, makinf Low–Noise Designs Possible
Applications:
D CRT/CTV Power Supplies
D Office Automation Equipment Power Supplies
Absolute Maximum Ratings: (T_A = +25°C unless otherwise specified)
Operating Substrate Temperature (Recommended value is +105°C), T_Cmax . . . . . . . . . . . . +115°C
AC Input Voltage, V_AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140V_rms
OPerating Temperature Range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10° to +85°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +115°C
Maximum Output Power (V_O = 135V), W_Omax
NTE7125 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110W
NTE7126 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145W
TR1
Drain Current, I_D
NTE7125 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6A
NTE7126 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8A
Pulse Drain Current, I_{D (pulse)} . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20A
Drain Reverse Current, I_DR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6A
Gate–Source Voltage, V_GSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±30V