NTE7117
Integrated Circuit
Switched鈥揗ode Power Supply Controller
Description:
The NTE7117 is a control circuit in an 8鈥揕ead DIP type package designed for use in switched鈥搈ode
power supplies. It contains an internal temperature鈥揷ompensated supply, PWM, sawtooth oscillator,
over鈥揷urrent sense latch, and output stage. This device is intended for low cost SMPS applications
where extensive housekeeping functions are not required.
Features:
D
Pulse Width Modulator
D
Current Limiting (Cycle鈥揵y鈥揅ycle)
D
Sawtooth Generator
D
Stabilized Power Supply
D
Double鈥揚(yáng)ulse Protection
D
Internal Temperature鈥揅ompensated Reference
Applications:
D
Switch鈥揗ode Power Supplies
D
DC Motor Controller Inverter
D
DC/DC Converter
Absolute Maximum Ratings:
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Output Current, I
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA
Output Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98%
Maximum Total Power Dissipation, P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW
Operating Temperature Range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0擄 to +70擄C
DC Electrical Characteristics:
(V
CC
= 12V, T
A
= +25擄C unless otherwise specified)
Parameter
Reference Section
Internal Reference Voltage
Internal Zener Reference
Temperature Coefficient of V
REF
Temperature Coefficient of V
Z
Oscillator Section
Frequency Range
Initial Accuracy
Duty Cycle Range
f
T
A
= 0擄 to +70擄C
R
T
and C
T
Constant
f
o
= 20kHz
50
鈥?/div>
0
鈥?/div>
5
鈥?/div>
100k
鈥?/div>
98
Hz
%
%
V
REF
V
Z
T
A
= +25擄C
T
A
= 0擄 to +70擄C
I
L
= 7mA
3.69
3.66
7.8
鈥?/div>
鈥?/div>
3.75
鈥?/div>
8.2
鹵100
鹵100
3.84
3.87
8.8
鈥?/div>
鈥?/div>
V
V
V
ppm/擄C
ppm/擄C
Symbol
Test Conditions
Min
Typ
Max
Unit
NTE7117相關(guān)型號PDF文件下載
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