NTE1840 & NTE1841
Integrated Circuit
Hybrid Switching Voltage Regulator
Features:
D Triple Diffused Transistor Chips Incorporated
D Compact Plastic Package with Industry Standard Reliability
D Output Voltage is Pre–Fixed – No External Adjustment is Required
Absolute Maximum Ratings:
Peak Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550V
Input Current, IIN
Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6A
Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12A
Power Dissipation (TC = +100°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27W
Maximum Power Transistor Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Operating Temperature Range (TC), Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +125°C
Electrical Characteristics: (TA = +25°C unles otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Voltage
V
O
V
O
V
= 120V, I = 900mA
114.5 116.0 117.5
V
IN
O
Detecting Voltage (Fixed Output)
NTE1840
I = 7mA
in
41.3
42.5
41.8
43.0
42.3
43.5
V
V
NTE1841
Load Regulation
Reg
V
= 120V, I = 500mA to 900mA
Initial Value ±1
±2
V
LOAD
IN
O
Output Voltage Temperature
Coefficient
T = –20° to +100°C, I = 7mA
C
–
–
mV/°C
in
Saturation Voltage
V
V
I = 2A, I = 400mA
–
–
–
–
1.0
1.5
40
1.0
–
V
V
CE(sat)
C
B
I = 2A, I = 400mA
BE(sat)
C
B
DC Current Gain
h
FE
I = 1A, V = 4V
10
–
–
C
CE
Collector Cutoff Current
I
V
CE
= 550V, V = –1.5V
–
mA
CEX
BE
Power Transistor Thermal
Resistance
R
Between Junction and Stem
Upper Surface
–
1.8
°C/W
thJC
Switching Time
t
–
–
–
–
12
7
µs
µs
I = 2A, I = 300mA, I = 300mA,
L
s
C
B1
B2
R = 50Ω
t
f
Note 1. Recommended Case Temperature: Topr = +100°C.