TND308/D [ETC]
Graphical Data Test Circuits for the NCP1651 ; 图形化数据测试电路的NCP1651\n
| 型号： | TND308/D |
| 厂家： | 
ETC |
| 描述： | Graphical Data Test Circuits for the NCP1651
|
| 文件： | 总8页 (文件大小：69K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TND308
Graphical Data Test
Circuits for the NCP1651
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
NCP1651/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
0.1 mF
0.1 mF
13
12
13
12
1 mF
1 mF
V
V
V
V
ref
CC
ref
CC
16
16
Startup
Startup
1
5
1
5
Output
Output
1 nF
I
S+
I
S+
11
8
8
+
AC Comp
FB/SD
FB/SD
11
0–1 V
AC Comp
7
6
7
6
I
I
avg
avg
I
I
avg fltr
10
9
10
9
avg fltr
0.5 nF
Ref Fltr
Ref Fltr
R8
1.5 V
AC Input
GND
AC Input
GND
Ramp
Comp
Ramp
Comp
C
C
T
T
4.7 k
2
3
4
2
3
4
470 pF
470 pF
47 k
47 k
Figure 1. Current Sense Amplifier Gain
Figure 2. FB/SD V–I Characteristics
Re: NCP1651/D data sheet, Figure 4
Re: NCP1651/D data sheet, Figure 5
Energize all three power sources, beginning with the 14 volt
supply. Cycle the 14 volt supply down to 8 volts and back to
14 to start unit operating. Adjust power supply on pin 5 and
read voltages on pins 6 and 7.
Using a decade resistance box for R8, set it to 1 MW. Turn
on the 14 volt source. Cycle it down to 8 volts and back up to
14 to turn the unit on. Read the voltage and pin 8 and note the
resistance. Reduce R8 until the unit shuts down. Calculate the
current for each reading.
Semiconductor Components Industries, LLC, 2002
1
Publication Order Number:
May, 2002 – Rev.0
TND308/D
TND308
V
A
V
CC
0.1 mF
0.1 mF
13
12
13
12
Curve
Tracer
1 mF
V
V
V
V
ref
CC
ref
CC
16
16
Startup
Startup
1
5
1
5
Output
Output
1 nF
1 nF
I
S+
I
S+
11
8
11
8
AC Comp
FB/SD
AC Comp
FB/SD
7
6
7
6
I
I
avg
avg
I
I
avg fltr
10
9
10
9
avg fltr
Ref Fltr
Ref Fltr
1.5 V
AC Input
GND
AC Input
GND
Ramp
Comp
Ramp
Comp
C
C
T
T
2
3
4
2
3
4
470 pF
470 pF
47 k
47 k
Figure 3. Bias Current versus VCC
Re: NCP1651/D data sheet, Figures 6 and 7
Figure 4. Startup Leakage
Re: NCP1651/D data sheet, Figure 8
Apply voltage from 1.5 volt source. Begin with V at 0
volts and take current readings over a range of 0 to 11 volts.
Device needs to be non–operational for this test. Begin
with curve tracer set to about 20 volts for low voltage
readings. As unit heats up, currents will drop.
CC
Reduce V to 8 volts, and then increase to 12 volts, unit
CC
should begin operation. Reduce voltage to approximately 10
volts and take current readings up to 18 volts. If unit shuts
down before 10 volts, note shutdown voltage. Recycle input
power (V to 12 volts, 8 volts and 12 again) and adjust V
CC
CC
to just above shutdown threshold and take readings.
V
A
V
V
CC
CC
0–500 V
0.1 mF
0.1 mF
13
12
13
12
A
1 mF
1 mF
V
V
V
V
ref
CC
ref
CC
16
16
Startup
Startup
1
5
1
5
Output
Output
1 nF
1 nF
I
S+
I
S+
11
8
11
8
AC Comp
FB/SD
AC Comp
FB/SD
V
7
6
7
6
I
I
avg
avg
I
I
avg fltr
10
9
10
9
avg fltr
Ref Fltr
Ref Fltr
1.5 V
1.5 V
AC Input
GND
AC Input
GND
Ramp
Comp
Ramp
Comp
C
C
T
T
2
3
4
2
3
4
470 pF
470 pF
47 k
47 k
Figure 5. Startup Current and Leakage
Re: NCP1651/D data sheet, Figure 9
Figure 6. UVLO Thresholds
Re: NCP1651/D data sheet, Figure 10
Apply voltage from 1.5 volt source. Turn on V and
Apply voltage from 1.5 volt source. Turn on V and
CC
CC
bring up to 12 volts. Reduce it to 8 volts and then increase
it back to 12 volts. Adjust high voltage to 500 volts and take
current measurement.
bring up to 12 volts. Reduce it to 8 volts and then increase
it slowly to the point when the unit begins operation. At that
point the input current will jump from about 0.5 mA to
roughly 5 mA. Decrease the V voltage until the V
CC
CC
current drops back to 0.5 mA, this is the turn–off voltage.
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TND308
14 V
1 mF
V
CC
0.1 mF
0.1 mF
13
12
13
12
1 mF
V
V
V
V
ref
CC
ref
CC
16
16
Startup
Startup
1
5
1
5
Output
Output
I
S+
I
S+
11
8
11
8
AC Comp
FB/SD
AC Comp
FB/SD
0–5 V
1 mF
7
6
7
6
I
I
avg
avg
I
I
avg fltr
10
9
10
9
avg fltr
0.5 nF
0.5 nF
Ref Fltr
Ref Fltr
V
AC Input
GND
AC Input
GND
2
Ramp
Comp
Ramp
Comp
V
C
C
T
T
4.7 k
4.7 k
2
3
4
3
4
0–5 V
470 pF
470 pF
47 k
47 k
Figure 7. Clamp Voltage versus VCC
Figure 8. Reference Multiplier Family of Curves
Re: NCP1651/D data sheet, Figure 11
Re: NCP1651/D data sheet, Figure 12
Begin with V at 0 volts and increase to 11 volts taking
Energize the 14 volt bias supply, and then the other two
supplies on pins 8 and 9. Adjust pin 8 to about 1 volt, then
reduce the 14 volt supply to 8 volts and back up to 14. This
will start the chip operating. Adjust the supplies on pins 8
and 9, and measure the voltage on pin 10.
CC
measurements at frequent intervals. This will not allow the
chip to go into the operational mode, as that would turn off
the clamp.
+
14 V
0.1 mF
0.1 mF
50 Vdc
+
13
12
16
13 12
C
charge
1 mF
V
V
ref
Startup
V
CC
V
ref
CC
16
Startup
1
5
1
Output
Output
1 nF
5
I
S+
I
S+
11
8
11
8
AC Comp
FB/SD
AC Comp
FB/SD
7
6
7
6
I
I
avg
avg
I
I
10
9
10
9
avg fltr
avg fltr
Ref Fltr
Ref Fltr
1.5 V
AC Input
AC Input
GND
Ramp
Comp
Ramp
Comp
GND
2
C
T
C
T
3
4
2
3
4
C
T
470 pF
47 k
47 k
Figure 9. Turn–on Time
Re: NCP1651/D data sheet, Figure 13
Figure 10. Frequency versus CT
Re: NCP1651/D data sheet, Figure 14
Using a series of capacitors from 1 mF to 1000 mF, apply
the 50 volt supply with a rise time of less than 100 ms.
Apply both voltage sources, reduce the 14 volt source to
8 volts and then increase to 14 volts. Measure frequency.
Measure time required for the V cap to charge to its peak.
Repeat for various values of C , and measure the frequency
CC
T
This is the point at which the chip will start operating if
at pin 4. Do not measure directly from pin 3, as the
impedance of the measuring device will cause errors in the
reading.
possible. Since this is not an operable configuration, V
will then decay to the turn off threshold.
CC
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3
TND308
14 V
1 mF
14 V
1 mF
0.1 mF
0.1 mF
13
12
13
12
V
V
V
V
ref
CC
ref
CC
16
16
Startup
Startup
1
5
1
5
Output
Output
I
S+
I
S+
8
8
FB/SD
FB/SD
11
11
AC Comp
AC Comp
7
6
7
6
I
I
avg
avg
I
I
avg fltr
10
9
10
9
avg fltr
Ref Fltr
Ref Fltr
2.5 V
1.5 V
AC Input
AC Input
Ramp
Comp
Ramp
Comp
GND
2
C
GND
2
C
T
T
3
4
3
4
C
C
T
T
47 k
47 k
Figure 11. Ramp Peak versus Frequency
Figure 12. Maximum Duty Cycle versus Frequency
Re: NCP1651/D data sheet, Figure 15
Re: NCP1651/D data sheet, Figure 16
Apply both voltage sources, reduce the 14 volt source to
8 volts and then increase to 14 volts. Measure ramp peak at
Apply both voltage sources, reduce the 14 volt source to
8 volts and then increase to 14 volts. Measure frequency and
duty cycle, using an oscilloscope on pin 1, for various values
pin 3 with an oscilloscope for various values of C .
T
of C .
T
0.1 mF
14 V
1 mF
14 V
1 mF
0.1 mF
13
12
13
12
680
V
V
V
V
ref
CC
ref
CC
16
16
Startup
Startup
1
5
1
5
Output
Output
C
L
I
I
S+
8
S+
8
FB/SD
FB/SD
11
11
AC Comp
7
6
AC Comp
7
6
I
I
avg
avg
I
I
avg fltr
10
9
10
9
avg fltr
Ref Fltr
Ref Fltr
1.5 V
1.5 V
AC Input
AC Input
Ramp
Comp
Ramp
Comp
GND
2
C
GND
2
C
T
T
3
4
3
4
470 pF
47 k
470 pF
47 k
Figure 13. Driver Rise and Fall Times versus
Capacitance
Figure 14. Vref Transient Response
Re: NCP1651/D data sheet, Figure 18
Re: NCP1651/D data sheet, Figure 17
Apply both voltage sources, reduce the 14 volt source to
8 volts and then increase to 14 volts. Adjust the voltage of
the 1.5 volt source for approximately 50% duty cycle on the
output driver pin. Measure the waveform on pin 1 with an
oscilloscope for the 10% and 90% rise and fall time. Change
Apply both voltage sources, reduce the 14 volt source to
8 volts and then increase to 14 volts. Adjust the voltage of
the 1.5 volt source for approximately 50% duty cycle on the
output driver pin. Measure the waveform on pin 12 with an
oscilloscope.
C as required.
L
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TND308
14 V
1 mF
14 V
1 mF
0.1 mF
0.1 mF
13
12
13
12
V
V
V
V
ref
CC
ref
CC
16
16
Startup
Startup
1
5
1
5
Output
Output
I
S+
I
S+
11
8
8
AC Comp
FB/SD
FB/SD
11
AC Comp
7
6
7
6
I
I
avg
avg
I
I
avg fltr
10
9
10
9
avg fltr
Ref Fltr
Ref Fltr
1.5 V
1.5 V
AC Input
AC Input
Ramp
Comp
Ramp
Comp
GND
2
C
GND
2
C
T
T
3
4
3
4
470 pF
470 pF
47 k
47 k
Figure 15. Frequency versus Temperature
Figure 16. Ramp Peak versus Temperature
Re: NCP1651/D data sheet, Figures 19 and 20
Re: NCP1651/D data sheet, Figure 21
Apply both voltage sources, reduce the 14 volt source to
8 volts and then increase to 14 volts. Measure the frequency
at pin 1 using an oscilloscope or frequency counter.
Apply both voltage sources, reduce the 14 volt source to
8 volts and then increase to 14 volts. Measure ramp peak at
pin 3 with an oscilloscope.
10 mA
5 mA
2 mA
14 V
1 mF
A
V
0.1 mF
0 mA
0.65 k 1.30 k 3.25 k
13
12
V
V
ref
V
CC
16
Startup
1
5
Output
I
8
S+
FB/SD
11
AC Comp
7
6
I
avg
I
10
9
avg fltr
Ref Fltr
1.5 V
AC Input
GND
Ramp
Comp
C
T
2
3
4
470 pF
47 k
Figure 17. Vref Line/Load Regulation
Re: NCP1650/D data sheet, Figures 22 and 23
Apply both voltage sources, reduce the 14 volt source to
8 volts and then increase to 14 volts. To measure load
10 mA. To measure line regulation, hold the load constant
and measure V and V at various V levels between 10
ref
CC
CC
regulation, hold the V voltage constant and vary the load,
and 18 volts.
CC
measuring V a load current at various loads between 0 and
ref
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5
TND308
V
V
CC
0.1 mF
13
12
R
1 mF
V
LOAD
V
V
ref
CC
16
Startup
1
5
Output
I
S+
11
8
AC Comp
FB/SD
7
6
I
avg
I
10
9
avg fltr
Ref Fltr
AC Input
Ramp
Comp
GND
2
C
T
3
4
470 pF
47 k
Figure 18. Vref versus VCC in Shutdown Mode
Re: NCP1651/D data sheet, Figure 24
Connect desired load to pin 12. Apply 14 volts to VCC pin, unit will be in shutdown mode. Measure Vref voltage.
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TND308
Notes
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TND308
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TND308/D
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