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PDF NTE7117 Data sheet ( Hoja de datos )
| Número de pieza | NTE7117 | |
| Descripción | Integrated Circuit Switched-Mode Power Supply Controller | |
| Fabricantes | NTE Electronics | |
| Logotipo |  |
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NTE7117
Integrated Circuit
Switched–Mode Power Supply Controller
Description:
The NTE7117 is a control circuit in an 8–Lead DIP type package designed for use in switched–mode
power supplies. It contains an internal temperature–compensated supply, PWM, sawtooth oscillator,
over–current 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–by–Cycle)
D Sawtooth Generator
D Stabilized Power Supply
D Double–Pulse Protection
D Internal Temperature–Compensated Reference
Applications:
D Switch–Mode Power Supplies
D DC Motor Controller Inverter
D DC/DC Converter
Absolute Maximum Ratings:
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Output Current, IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA
Output Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98%
Maximum Total Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW
Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
DC Electrical Characteristics: (VCC = 12V, TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Reference Section
Internal Reference Voltage
Internal Zener Reference
Temperature Coefficient of VREF
Temperature Coefficient of VZ
Oscillator Section
VREF
VZ
TA = +25°C
TA = 0° to +70°C
IL = 7mA
3.69 3.75 3.84 V
3.66 – 3.87 V
7.8 8.2 8.8
V
– ±100 – ppm/°C
– ±100 – ppm/°C
Frequency Range
Initial Accuracy
Duty Cycle Range
f TA = 0° to +70°C
RT and CT Constant
fo = 20kHz
50 – 100k Hz
–5–
%
0 – 98 %
1 page | ||
| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet NTE7117.PDF ] | |
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