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° </= T
A </= +70°C, V
CC = +15V, R
t = 10k, C
t = 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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