参数资料
| 型号： | IRPLMB1E |
| 厂商： | International Rectifier |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | KIT DESIGN BALLAST 220VAC |
| 标准包装： | 1 |
| 其它名称： | *IRPLMB1E |
IRPLMB1E
Fig. 7.4 shows pin VCO and pin VS (HB Voltage) at
the shutdown with a shorter time scale. The FMIN
pin can be used as trigger as this pin transitions
from 5V to COM when the IC enters fault mode or
UVLO-.
Fig. 7.4:
1 is the voltage in pin FMIN, 3 is the voltage in pin
VCO, 2 is pin VS
Fig. 7.3:
3 is the voltage in pin VCO and 2 is pin VS
8
7.3. Low AC line Protection
As you can see from figure 7.5, varying the AC line
from 220V to 130VAC the ZVMCS circuit of the IR2520
increases automatically the frequency to maintain
ZVS.
When the mains voltage decreases, the resonant
frequency increases, becoming close to the run
frequency. This will cause non-ZVS. The IR2520
will detect non-ZVS and increase the frequency
continuously as long as non-ZVS is detected. This
will protect the half-bridge MOSFETs against
hard-switching.
www.irf.com
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| IS-DEV KIT-2 | SMARTSWITCH DEVELOPMENT KIT 2 |
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