9.00CHF
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NTE7098 Current Mode PWM Pulse Width Modulator PDIP-8

Bestell-Nr.:    NTE7098


Verfügbarkeit:     PICTURE_ONLY_FOUR
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NTE7098 NTE-7098 | ECG7098 ECG-7098 | NTE Electronics NTE7098
Integrated Circuit Current Mode Pulse Width Modulator (PWM) Control Circuit 8-PIN DIP

See also >>> NTE7099

Description:
The NTE7098 and NTE7099 are integrated circuits in 8-Lead DIP type packages that incorporate a new precision temperature-controlled oscillator to minimize variations in frequency. An internal toggle flip-flop, which blanks the output off every other clock cycle, limits the duty-cycle range to less than 50%. An under-voltage lockout ensures that VREF is stabilized before the output stage is enabled. Other features include low start-up current, pulse-by-current limiting, and high-current totem pole output for driving capacitive loads, such as the gate of a power MOSFET. The output is low in the off state, consistent with N-channel devices.

Features:
- Optimized for Off-Line Control
- Temperature Compensated Oscillator
- 50% Maximum Duty-Cycle Clamp
- Vref Stabilized before Output Stage is Enabled
- Low Start-Up Current
- Pulse-by Pulse Current Limiting
- Improved U/V Lockout
- Double Pulse Suppression
- 1% Trimmed Bandgap Reference
- High Current Totem Pole Output

Info as pdf-file
NTE-ECG replacement list as pdf-file
Diagrams and Info of most NTE-ECG Components

Absolute Maximum Ratings:
Supply Voltage (ICC < 30mA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Self Limiting
Supply Voltage (Low Impedence Source) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1A
Output Energy (Capacitive Load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5μJ
Analog Inputs (VFB, VSENSE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VCC
Error Amp Output Sink Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA

Electrical Characteristics: (0° </= TA </= +70°C, VCC = +15V, Rt = 10k, Ct = 3.3nF for sawtooth mode, Note 1 unless otherwise specified)
Parameter Test Conditions Min Typ Max Unit
Reference Section
Output Voltage TJ = +25°C, Iref = 1mA 4.9 5.0 5.1 V
Line Regulation 12V </= VIN </= 25V - 6 20 mV
Load Regulation 1mA </= Iref </= 20mA - 6 25 mV
Temperature Stability Note 2 - 0.2 0.4 mV/°C
Total Output Variation Line, Load, Temperature, Note 2 4.82 - 5.18 V
Output Noise Voltage 10Hz </= f </= 10kHz, TJ = +25°C, Note 2 - 50 - µV
Long Term Stability TA = +125°C, 1000Hrs., Note 2 - 5 25 mV
Output Short Circuit TA = +25°C -30 -100 -180 mA
Oscillator Section
Initial Accuracy Sawtooth Mode, TJ = +25°C 47 52 57 kHz
Voltage Stability 12V </= VCC </= 25V - 0.2 1.0 %
Temperature Stability Sawtooth Mode, 0° </= TA </= +70°C, Note 2 - 5 - %
Amplitude VPIN4 peak to peak - 1.7 - V
Error Amp Section
Input Voltage VCOMP = 2.5V 2.42 2.50 2.58 V
Input Bias Current VFB = 0V - -0.3 -2.0 µA
AVOL 2V </= VO </= 4V 65 90 - dB
Unity Gain Bandwidth Note 2 0.7 1.0 - MHz
PSRR 12V </= VCC </= 25V 60 70 - dB
Output Sink Current VFB = 2.7V, VCOMP = 1.1V 2 6 - mA
Output Source Current VFB = 2.3V, VCOMP = 5V -0.5 -0.8 - mA
VOUT High VFB = 2.3V, RL = 15k to GND 5 6 - V
VOUT Low VFB = 2.7V, RL = 15k to Pin8 - 0.7 1.1 V
Current Sense Section
Gain Note 3, Note 4 2.85 3.00 3.15 V/V
Maximum Input Signal VCOMP = 5V, Note 3 0.9 1.0 1.1 V
PSRR 12V </= VCC </= 25V, Note 3 - 70 - dB
Input Bias Current   - -2 -10 µA
Delay to Output TJ = +25°C, Note 2 - 150 300 ns
Output Section
Output Low Level ISINK = 20mA - 0.1 0.4 V
ISINK = 200mA - 1.5 2.2 V
Output High Level ISOURCE = 20mA 13.0 13.5 - V
ISOURCE = 200mA 12.0 13.5 - V
Rise Time TJ = +25°C, CL = 1nF, Note 2 - 50 150 ns
Fall Time TJ = +25°C, CL = 1nF, Note 2 - 50 150 ns
Total Standby Current
Start-Up Current   - 0.5 1.0 mA
Operating Supply Current VFB = VSENSE = 0V, RT = 10k, CT = 3.3nF - 11 17 mA
VCC Zener Voltage ICC = 25mA - 34 - V
PWM Section
Maximum Duty Cycle   46 48 50 %
Minimum Duty Cycle   - - 0 %
Under-Voltage Lockout Section
Start Threshold
      NTE7098
      NTE7099
  14.5
7.8
16.0
8.4
17.5
9.0
V
V
Minimum Operating Voltage
      NTE7098
      NTE7099
After Turn-On

8.5
7.0
10.0
7.9
11.5
8.2
V
V

Note 1.Adjust VCC above the start threshold before setting at 15V.
Note 2.These parameters, although guaranteed, are not 100% tested in production.
Note 3.Parameter measured at trip point of latch with VPIN2 = 0.
Note 4.Gain defined as: A = VCOMP / VSENSE; 0 </= VPin3 </= 0.8V.




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Anmerkung zu den NTE/ECG Austauschhalbleiter:
NTE-Austauschhalbleiter (früher ECG Philips und Sylvania) sind sorgfältig ausgesuchte und erprobte Halbleiter, die einen sicheren Ersatz für Originaltypen verschiedenster Hersteller und Ursprünge für fast alle Applikationsbereiche im Wartungsdienst bieten.
Alle NTE-Austausch-Halbleiter sind einzeln in durchsichtigen Plastikbeuteln verpackt, auf welchen die wichtigsten Daten vermerkt sind.

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