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參數(shù)資料
| 型號： | AN-14 |
| 英文描述： | TOPSwitch Tips. Techniques & Troubleshooting Guide |
| 中文描述： | TOPSwitch的提示。技術(shù) |
| 文件頁數(shù)： | 6/28頁 |
| 文件大?。?/td> | 246K |
| 代理商： | AN-14 |
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AN-14
6
B
6/96
POWER FACTOR CORRECTION CIRCUITS
CAUSE
SYMPTOM
WHAT TO DO
Drain voltage rings below Source
potential
Precompensation resistor value is
not correct
Precompensation current
waveform is being filtered
Output voltage ripple modulates
duty cycle
Inductor value is too large and
enters continuous mode at peak of
rectified AC input voltage
Inductor value is too small and
TOPSwitch
current limit reduces
duty cycle
Precompensation resistor current
disables auto-restart
PFC stage does not start
Total Harmonic Distortion
(THD) is greater than 10%
PFC stage turns off with short
interruption in AC power
Add fast recovery blocking diode in series with Drain
(Section 19.1)
Adjust precompensation resistor until optimum THD
has been obtained (See DN-7)
Reduce bypass capacitance on Control pin to less than
4.7
μ
F
Add resistor (75 to 200
) between Control pin bypass
capacitor and auto-restart/compensation capacitor (R2
in Figure 19)
Increase auto-restart/compensation capacitor to reject
output voltage ripple
Decrease inductor value (See DN-7)
Increase inductor value (See DN-7)
Use
TOPSwitch
with higher current limit
Add 2.7 k
to 6.8 k
resistor across C3 (Figure 19) to
shunt precompensation current from control pin
(See DN-7)
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PDF描述 |
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| AN002R2-29 | SPDT RF Reflective Switch |
相關(guān)代理商/技術(shù)參數(shù) |
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| AN1405D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:3.3V / 5V ECL 2-Input Differential XOR/XNOR |
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| AN1406D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:3.3V / 5V ECL 2-Input Differential XOR/XNOR |
| AN14-17A | 制造商:AN# - MILITARY 功能描述: |
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