7078

NTE7078
Integrated Circuit
Hybrid Switching Voltage Regulator
Absolute Maximum Ratings:
Maximum Peak Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 850V
Input Current, IIN
Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6A
Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12A
Power Dissipation (TC = +100°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27W
Power Transistor Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Operating Temperature Range (Case Temperature, Note 1), Topr . . . . . . . . . . . . . . . –20° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +125°C
Note 1. Recommended Operating Temperature: Topr = +100°C
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Voltage
VO
VIN = 220V, IO = 700mA, Note 2
113.5 115.0 116.5
V
Sensing Voltage (Fixed Voltage)
VO
IIN = 7mA
41.3
V
41.8
42.3
Line Regulation
RegLINE VIN = 180V to 280V, IO = 700mA
Initial Value ±1V
V
Load Regulation
RegLOAD VIN = 220V, IO = 400mA to 700mA
Initial Value ±2V
V
TC = –20° to +100°C, IIN = 7mA
–
±2
–
mV/°C
VCE(sat)
IC = 2A, IB = 400mA
–
–
0.4
V
VBE(sat)
IC = 2A, IB = 400mA
–
–
1.5
V
DC Current Gain
hFE
IC = 1A, VCE = –4V
15
–
38
Collector Cutoff Current
ICEX
VCE = 850V, VBE = –1.5V
–
–
1
mA
Power Transistor Thermal
Resistance
RΘJC
Between Junction and Case
–
1.8
–
°C/W
IC = 2A, IB1 = 400mA, IB2 = –400mA,
RL = 100Ω
Ω
–
–
11.0
µs
–
–
0.5
µs
Output Voltage Temperature
Coefficient
Saturation Voltage
Switching Time
Kt
ts
tf
Note 2. Output voltage is determined by the ratio between the sensing winding “D” and the secondary
winding “S”.
Pin Connection Diagram
(Front View)
5 VOUT Adjust
4 GND
3 Input
2 Base Drive
1 Voltage Sensing
.700 (17.7)
.177 (4.5)
.700 (17.7)
.177 (4.5)
.196
(5.0)
1.101
(527.9)
1
2
3
4
OR
5
1
2
3
4
5
1.691
(42.9)
.133 (3.4)
.276
(7.0)
.590
(15.0)
.237
(6.0)
.100 (2.54)
.150 (3.8)
.500 (12.7)
.100 (2.54)
.150
(3.8)
.500 (12.7)
.177
(4.5)
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