The NTE7125 and NTE7126 are integrated circuits in a 12鈥揕ead SIP type package incorporating all
the power switching, amplifier, error detection, and overcurrent protection circuits required in a self鈥?/div>
extcitation type semi鈥搑egulated off鈥搇ine 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鈥損olar 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鈥揜egulated Control Switching Supplies
D
Error Detection Circuit On鈥揅hip (40.5V
鹵0.5V
Set Refernce Voltage)
D
Overcurrent Protection Circuit On鈥揅hip
D
Higher Oscillation Frequency allows the use of Smaller Pulse Transformers
D
IMST Substrate acts as an Electromagnetic Shield, makinf Low鈥揘oise Designs Possible
Applications:
D
CRT/CTV Power Supplies
D
Office Automation Equipment Power Supplies
Absolute Maximum Ratings:
(T
A
= +25擄C unless otherwise specified)
Operating Substrate Temperature (Recommended value is +105擄C), T
C
max . . . . . . . . . . . . +115擄C
AC Input Voltage, V
AC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140V
rms
OPerating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +85擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +115擄C
Maximum Output Power (V
O
= 135V), W
O
max
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鈥揝ource Voltage, V
GSS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
鹵30V
1
2
3
