NTE7078
Integrated Circuit
Hybrid Switching Voltage Regulator
Absolute Maximum Ratings:
Maximum Peak Input Voltage, V
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 850V
Input Current, I
IN
Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6A
Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12A
Power Dissipation (T
C
= +100°C), P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27W
Power Transistor Junction Temperature, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Operating Temperature Range (Case Temperature, Note 1), T
opr
. . . . . . . . . . . . . . . –20° to +125°C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +125°C
Note 1. Recommended Operating Temperature: T
opr
= +100°C
Electrical Characteristics:
(T
A
= +25°C unless otherwise specified)
Parameter
Output Voltage
Sensing Voltage (Fixed Voltage)
Line Regulation
Load Regulation
Output Voltage Temperature
Coefficient
Saturation Voltage
Symbol
V
O
V
O
Test Conditions
V
IN
= 220V, I
O
= 700mA, Note 2
I
IN
= 7mA
Min
Typ
Max
Unit
V
V
V
V
mV/°C
V
V
113.5 115.0 116.5
41.3
41.8
42.3
Initial Value
±1V
Initial Value
±2V
–
–
–
15
–
–
–
–
±2
–
–
–
–
1.8
–
–
–
0.4
1.5
38
1
–
11.0
0.5
mA
°C/W
µs
µs
Reg
LINE
V
IN
= 180V to 280V, I
O
= 700mA
Reg
LOAD
V
IN
= 220V, I
O
= 400mA to 700mA
K
t
V
CE(sat)
V
BE(sat)
h
FE
I
CEX
R
ΘJC
t
s
t
f
T
C
= –20° to +100°C, I
IN
= 7mA
I
C
= 2A, I
B
= 400mA
I
C
= 2A, I
B
= 400mA
I
C
= 1A, V
CE
= –4V
V
CE
= 850V, V
BE
= –1.5V
Between Junction and Case
I
C
= 2A, I
B1
= 400mA, I
B2
= –400mA,
R
L
= 100Ω
Ω
DC Current Gain
Collector Cutoff Current
Power Transistor Thermal
Resistance
Switching Time
Note 2. Output voltage is determined by the ratio between the sensing winding “D” and the secondary
winding “S”.
NTE [ NTE ELECTRONICS ]
