TND307 [ONSEMI]
Graphical Data Test Circuits for the NCP1650; 图形化数据测试电路的NCP1650
| 型号： | TND307 |
| 厂家： | 
ONSEMI |
| 描述： | Graphical Data Test Circuits for the NCP1650 |
| 文件： | 总8页 (文件大小：79K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TND307
Graphical Data Test
Circuits for the NCP1650
Prepared by
Alan Ball
ON Semiconductor Applications Engineering
http://onsemi.com
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.
APPLICATION NOTE
14 V
14 V
1 mF
30 k
30 k
0.1 mF
0.1 mF
1
2
1
2
1 mF
V
V
V
V
in
ref
in
ref
3
4
5
6
7
8
9
3
4
5
6
7
8
9
AC Comp
Ref Filter
AC Input
FB/SD
AC Comp
Ref Filter
AC Input
FB/SD
16
12
16
12
Output
Output
300
0 to –5 V
0.5 mF
I
S–
0.05 mF
0–5 V
I
S–
10
11
10
11
I
I
avg
avg
Loop Comp
Loop Comp
0–5 V
I
I
avg fltr
avg fltr
1 nF
P
comp
P
max
P
comp
P
max
0–5 V
1 k
Ramp
Comp
Ramp
Comp
0.1 mF
GND
C
GND
C
T
T
10
15 k
15
14
13
47 k
15
14
13
47 k
10 k
10 k
47 k
470 pF
470 pF
Figure 1. Power Multiplier Family of Curves
Figure 2. Reference Multiplier Family of Curves
Re: NCP1650/D data sheet, Figure 3
Re: NCP1650/D data sheet, Figure 4
Power up chip. Set I between 0 and –200 mV in 50 mV
S–
increments. For each value of I set the ac input (pin 5) to
S–
various values from 0 to 3.8 volts. Record output P
(pin 9).
max
Semiconductor Components Industries, LLC, 2002
1
Publication Order Number:
March, 2002 – Rev.0
TND307/D
TND307
14 V
1 mF
14 V
1 mF
30 k
30 k
0.1 mF
0.1 mF
1
2
1
2
V
V
V
V
in
ref
in
ref
3
4
5
6
7
8
9
3
4
5
6
7
8
9
AC Comp
Ref Filter
AC Input
FB/SD
AC Comp
Ref Filter
AC Input
FB/SD
16
12
16
12
Output
Output
I
S–
I
S–
10
11
10
11
I
I
avg
avg
Loop Comp
Loop Comp
I
I
avg fltr
avg fltr
3.3 k
10 k
P
comp
3.3 k
10 k
P
comp
P
max
P
max
Ramp
Comp
Ramp
Comp
GND
C
T
GND
C
T
15 14
13
15 14
13
47 k
Freq Cntr
47 k
Freq Cntr
C
C
T
T
Figure 4. Ramp Peak versus Frequency
Figure 3. Frequency versus CT
Re: NCP1650/D data sheet, Figure 5
Re: NCP1650/D data sheet, Figure 6
Bias device per the above figure. Install various values of
Bias device per the above figure. Install various values of
C , and measure the frequency at pin 13. Do not measure
T
C , and measure the frequency at pin 13. Measure
T
directly from pin 14, as the impedance of the measuring
device will cause errors in the reading.
amplitude at pin 14 with an oscilloscope.
14 V
14 V
30 k
0.1 mF
0.1 mF
1
2
1
2
1 mF
1 mF
V
V
V
V
in
ref
in
ref
3
4
5
6
7
8
9
3
4
5
6
7
8
9
AC Comp
Ref Filter
AC Input
FB/SD
AC Comp
Ref Filter
AC Input
FB/SD
16
12
16
12
Output
Output
0–5 V
C
I
S–
I
S–
L
10
11
10
11
I
I
avg
avg
Loop Comp
Loop Comp
I
I
avg fltr
avg fltr
2.5 V
3.3 k
P
comp
P
comp
3.3 k
P
max
P
max
Ramp
Comp
Ramp
Comp
GND
C
T
GND
15
470 pF
C
T
15 14
13
14
13
47 k
10 k
47 k
C
T
Figure 5. Max Duty Cycle versus Frequency
Figure 6. Drive Rise and Fall Time versus Capacitance
Re: NCP1650/D data sheet, Figure 7
Re: NCP1650/D data sheet, Figure 8
Measure frequency and duty cycle for various values of
C .
T
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 C as required.
L
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2
TND307
0.1 mF
14 V
1 mF
14 V
1 mF
30 k
0.1 mF
1
2
1
2
650
V
V
V
V
in
ref
in
ref
3
4
5
6
7
8
9
3
4
5
6
7
8
9
AC Comp
Ref Filter
AC Input
FB/SD
AC Comp
Ref Filter
AC Input
FB/SD
16
12
Output
1.5 V
300
0 to –5 V
16
12
10
11
I
S–
Output
I
S–
10
11
I
I
avg
avg
Loop Comp
Loop Comp
0.05 mF
I
I
avg fltr
avg fltr
1 nF
P
comp
P
comp
P
max
P
max
Ramp
Comp
Ramp
Comp
0.1 mF
GND
C
T
GND
15
470 pF
C
T
3.3 k
10
15 k
15
14
13
10 k
14
13
47 k
10 k
47 k
470 pF
Figure 7. Current Sense Amplifier Gain
Figure 8. Vref, Transient Response
Re: NCP1650/D data sheet, Figure 9
Re: NCP1650/D data sheet, Figure 11
Adjust voltage at pin 12, and read values at pins 10 & 11.
14 V
14 V
1 mF
0.1 mF
0.1 mF
1
2
1
2
1 mF
V
V
V
V
in
ref
in
ref
9
6
5
7
3
4
8
6
9
5
8
3
4
7
P
FB/SD
16
12
max
16
12
Output
Output
FB/SD
P
max
I
S–
0–5 V
I
S–
0–5 V
AC Input
Loop Comp
AC Comp
Ref Filter
AC Input
V
V
V
V
P
comp
10
11
10
11
I
I
1 k
avg
1 k
avg
AC Comp
Ref Filter
1.5 V
I
1.5 V
I
avg fltr
avg fltr
P
comp
Loop Comp
Ramp
Comp
Ramp
Comp
GND
15
470 pF
C
T
GND
15
470 pF
C
T
14
13
47 k
14
13
47 k
3.3 k
3.3 k
Figure 9. Voltage Error Amplifier Gain
Figure 10. Power Error Amplifier Gain
Re: NCP1650/D data sheet, Figures 12 & 13
Re: NCP1650/D data sheet, Figures 14 & 15
14 V
14 V
1 mF
30 k
30 k
0.1 mF
0.1 mF
1
2
1
2
1 mF
V
V
V
V
in
ref
in
ref
3
4
5
6
7
8
9
3
4
5
6
7
8
9
AC Comp
Ref Filter
AC Input
FB/SD
AC Comp
Ref Filter
AC Input
FB/SD
16
12
16
12
Output
Output
I
S–
I
S–
10
11
10
11
I
I
avg
avg
Loop Comp
Loop Comp
I
I
avg fltr
avg fltr
33 k
10 k
P
comp
3.3 k
10 k
P
comp
P
max
P
max
Ramp
Comp
Ramp
Comp
GND
C
T
GND
15 14
470 pF
C
T
15 14
13
13
47 k
Freq Cntr
C
T
Figure 11. Frequency versus CT
Re: NCP1650/D data sheet, Figure 16
Figure 12. Ramp Peak versus Temperature
Re: NCP1650/D data sheet, Figure 17
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3
TND307
0–15 V
0.1 mF
1
2
1 mF
V
V
in
ref
3
4
5
6
7
8
9
AC Comp
Ref Filter
AC Input
FB/SD
16
12
Output
I
S–
10
11
I
avg
Loop Comp
I
avg fltr
P
comp
P
max
1.5 V
3.3 k
Ramp
Comp
GND
C
T
15 14
13
47 k
C
T
Figure 13. UVLO Turn On/Turn Off
Re: NCP1650/D data sheet, Figure 18
10 mA
5 mA
2 mA
14 V
1 mF
A
V
1
2
0.1 mF
0 mA
0.65 k 1.30 k 3.25 k
V
V
in
ref
3
4
5
6
7
8
9
AC Comp
Ref Filter
AC Input
FB/SD
16
12
V
Output
I
S–
10
11
I
avg
Loop Comp
I
avg fltr
P
P
comp
max
1.5 V
Ramp
Comp
GND
C
T
15 14
13
3.3 k
47 k
C
T
Figure 14. Vref Line/Load Regulation in Operating Mode
Re: NCP1650/D data sheet, Figures 19 & 20
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TND307
14 V
1 mF
14 V
1 mF
0.1 mF
0.1 mF
1
2
1
2
V
V
V
V
in
ref
in
ref
9
6
5
7
3
4
8
6
9
5
8
3
4
7
P
FB/SD
16
12
max
16
12
Output
Output
FB/SD
P
max
I
S–
0–5 V
I
S–
0–5 V
AC Input
Loop Comp
AC Comp
Ref Filter
AC Input
V
V
V
V
P
comp
10
11
10
11
I
I
1 k
avg
1 k
avg
AC Comp
Ref Filter
1.5 V
I
1.5 V
I
avg fltr
avg fltr
P
comp
Loop Comp
Ramp
Comp
Ramp
Comp
GND
15
470 pF
C
T
GND
15
470 pF
C
T
14
13
47 k
14
13
47 k
3.3 k
3.3 k
Figure 15. Voltage Error Amplifier Gain
Figure 16. Power Error Amplifier Gain
Re: NCP1650/D data sheet, Figure 21
Re: NCP1650/D data sheet, Figure 22
Energize unit by applying 14 volt supply. Using a
precision supply with resolution of 1 mV or less, adjust the
voltage at pin 6 for zero current out of pin 7. The voltage at
pin 6 will be the effective 4.0 V reference voltage.
Energize unit by applying 14 volt supply. Using a
precision supply with resolution of 1 mV or less, adjust the
voltage at pin 9 for zero current out of pin 8. The voltage at
pin 9 will be the effective 2.5 V reference voltage.
V
A
V
V
CC
14 V
1 mF
V
0.1 mF
0.1 mF
1
2
1
2
1 mF
V
V
V
V
in
ref
in
ref
3
3
4
5
6
7
8
9
AC Comp
Ref Filter
AC Input
FB/SD
AC Comp
Ref Filter
AC Input
FB/SD
16
12
16
12
Output
Output
4
5
6
7
8
9
1 nF
I
S–
I
S–
10
11
10
11
I
I
avg
avg
Loop Comp
Loop Comp
I
I
avg fltr
avg fltr
1.5 V
3.3 k
P
P
comp
comp
P
P
max
Ramp
Comp
max
Ramp
Comp
GND
C
T
GND
C
T
15 14
13
15 14
13
3.3 k
47 k
47 k
C
C
T
T
Figure 17. Bias Current versus VCC
Figure 18. Vref versus VCC in Shutdown Mode
Re: NCP1650/D data sheet, Figure 23
Re: NCP1650/D data sheet, Figure 24
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5
TND307
14 V
1 mF
0.1 mF
1
2
V
V
in
ref
3
4
5
6
7
8
9
AC Comp
Ref Filter
AC Input
FB/SD
16
12
Output
I
S–
10
11
I
avg
Loop Comp
I
avg fltr
P
comp
P
max
1.5 V
3.3 k
Ramp
Comp
GND
C
T
15 14
13
47 k
C
T
Figure 19. Minimum Duty Cycle versus Frequency
Re: NCP1650/D data sheet, Figure 25
Apply power to 14 V supply and then to 1.5 V supply.
Measure on time, and period at pin 16 using an
oscilloscope. Vary capacitor value from 2000 pF to 100 pF
for frequency range of 25 kHz to 300 kHz.
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6
TND307
Notes
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7
TND307
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TND307/D
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