TND307 Datasheet PDF - ON Semiconductor

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TND307
ON Semiconductor

Part Number TND307
Description Graphical Data Test Circuits
Page 8 Pages


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TND307
Graphical Data Test
Circuits for the NCP1650
Prepared by
Alan Ball
ON Semiconductor Applications Engineering
The following circuits are the test configurations that
were used to obtain the data for the graphical section of the
NCP1650/D data sheet. Each graph has a schematic
associated with it and in some cases a description of the
procedure.
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APPLICATION NOTE
www.DataSheet4U.com
30 k
0.5 mF
0–5 V
0.1 mF
47 k
1
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
2 0.1 mF
Vref
14 V
1 mF
Output 16
IS– 12
300
0 to –5 V
Iavg
10
11
Iavg fltr
1 nF
Ramp
GND
15
CT Comp
14 13
15 k
10 k 470 pF
47 k
10
Figure 1. Power Multiplier Family of Curves
Re: NCP1650/D data sheet, Figure 3
Power up chip. Set IS– between 0 and –200 mV in 50 mV
increments. For each value of IS– set the ac input (pin 5) to
various values from 0 to 3.8 volts. Record output Pmax (pin 9).
30 k
0.05 mF
0–5 V
0–5 V
1k
1 2 0.1 mF
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref
Output
IS–
16
12
Iavg
10
11
Iavg fltr
Ramp
GND
CT Comp
15 14 13
10 k 470 pF
47 k
14 V
1 mF
Figure 2. Reference Multiplier Family of Curves
Re: NCP1650/D data sheet, Figure 4
© Semiconductor Components Industries, LLC, 2002
March, 2002 – Rev.0
1
Publication Order Number:
TND307/D



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TND307
30 k
3.3 k
10 k
1 2 0.1 mF
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref
Output 16
IS– 12
Iavg
Iavg fltr
10
11
Ramp
GND
CT Comp
15 14
CT
13
47 k
14 V
1 mF
Freq Cntr
Figure 3. Frequency versus CT
Re: NCP1650/D data sheet, Figure 5
Bias device per the above figure. Install various values of
CT, and measure the frequency at pin 13. Do not measure
directly from pin 14, as the impedance of the measuring
device will cause errors in the reading.
30 k
3.3 k
10 k
1 2 0.1 mF
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref
Output 16
IS– 12
Iavg
10
11
Iavg fltr
Ramp
GND
CT Comp
15 14
CT
13
47 k
14 V
1 mF
Freq Cntr
Figure 4. Ramp Peak versus Frequency
Re: NCP1650/D data sheet, Figure 6
Bias device per the above figure. Install various values of
CT, and measure the frequency at pin 13. Measure
amplitude at pin 14 with an oscilloscope.
2.5 V
3.3 k
1 2 0.1 mF
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref
Output
IS–
16
12
Iavg
Iavg fltr
10
11
Ramp
GND
CT Comp
15 14
CT
13
47 k
14 V
1 mF
30 k
0–5 V
3.3 k
10 k
1 2 0.1 mF
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref
Output 16
IS– 12
Iavg
Iavg fltr
10
11
Ramp
GND
CT Comp
15 14 13
470 pF
47 k
14 V
1 mF
CL
Figure 5. Max Duty Cycle versus Frequency
Re: NCP1650/D data sheet, Figure 7
Figure 6. Drive Rise and Fall Time versus Capacitance
Re: NCP1650/D data sheet, Figure 8
Measure frequency and duty cycle for various values of
CT.
Adjust the voltage on pin 3 for approximately 50% duty
cycle from the output driver. Measure the waveform on pin
16 with an oscilloscope and measure the rise and fall times
at the 10% and 90% levels. Change CL as required.
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TND307
30 k
0.05 mF
0.1 mF
47 k
1
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
2 0.1 mF
Vref
14 V
1 mF
Output 16
IS– 12
300
0 to –5 V
Iavg
Iavg fltr
10
11
1 nF
Ramp
GND
CT Comp
15 14 13
10 k 470 pF
10 k
15 k
10
1.5 V
3.3 k
12
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref 650
Output 16
IS– 12
Iavg
10
11
Iavg fltr
Ramp
GND
CT Comp
15 14 13
470 pF
47 k
0.1 mF 14 V
1 mF
Figure 7. Current Sense Amplifier Gain
Re: NCP1650/D data sheet, Figure 9
Adjust voltage at pin 12, and read values at pins 10 & 11.
Figure 8. Vref, Transient Response
Re: NCP1650/D data sheet, Figure 11
1
2 0.1 mF
14 V
1 mF
1
2 0.1 mF
14 V
1 mF
0–5 V
V
9
Vin
Pmax
6 FB/SD
5 AC Input
Vref
Output 16
IS– 12
0–5 V
V
6
Vin
FB/SD
9 Pmax
5 AC Input
Vref
Output
IS–
16
12
V
1k
1.5 V
7 Loop Comp
3 AC Comp
4 Ref Filter
Iavg
10
11
Iavg fltr
V
1k
1.5 V
8 Pcomp
3 AC Comp
4 Ref Filter
Iavg
10
11
Iavg fltr
8 Pcomp
Ramp
7 Loop Comp Ramp
GND
CT Comp
GND
CT Comp
3.3 k
15 14
470 pF
13
47 k
3.3 k
15 14
470 pF
13
47 k
Figure 9. Voltage Error Amplifier Gain
Re: NCP1650/D data sheet, Figures 12 & 13
Figure 10. Power Error Amplifier Gain
Re: NCP1650/D data sheet, Figures 14 & 15
30 k
33 k
10 k
1 2 0.1 mF
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref
Output
IS–
16
12
Iavg
10
11
Iavg fltr
Ramp
GND
CT Comp
15 14
CT
13
47 k
14 V
1 mF
Freq Cntr
Figure 11. Frequency versus CT
Re: NCP1650/D data sheet, Figure 16
30 k
3.3 k
10 k
1 2 0.1 mF
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref
Output
IS–
16
12
Iavg
Iavg fltr
10
11
Ramp
GND
CT Comp
15 14 13
470 pF
14 V
1 mF
Figure 12. Ramp Peak versus Temperature
Re: NCP1650/D data sheet, Figure 17
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TND307
1.5 V
3.3 k
1 2 0.1 mF
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref
Output 16
IS– 12
Iavg
Iavg fltr
10
11
Ramp
GND
CT Comp
15 14
CT
13
47 k
0–15 V
1 mF
Figure 13. UVLO Turn On/Turn Off
Re: NCP1650/D data sheet, Figure 18
10 mA
5 mA
2 mA
0 mA
0.65 k 1.30 k 3.25 k
A
1.5 V
3.3 k
12
3
Vin
AC Comp
4 Ref Filter
5 AC Input
6 FB/SD
7 Loop Comp
8 Pcomp
9 Pmax
Vref
Output
IS–
16
12
Iavg
Iavg fltr
10
11
Ramp
GND
CT Comp
15 14
CT
13
47 k
0.1 mF
V
14 V
1 mF
Figure 14. Vref Line/Load Regulation in Operating Mode
Re: NCP1650/D data sheet, Figures 19 & 20
V
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