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PDF MCZ5205SE Data sheet ( Hoja de datos )
| Número de pieza | MCZ5205SE | |
| Descripción | CrM PFC and LLC controller/driver | |
| Fabricantes | Shindengen | |
| Logotipo |  |
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MCZ5205SE APPLICATION NOTE
Confidential
Jan.2011 Ver1.0
SHINDENGEN
ELECTRIC MFG.CO.,LTD
-1-
1 page  
1.2 Internal block diagram
Confidential
Fig.1 MCZ5205SE internal block diagram
SHINDENGEN
ELECTRIC MFG.CO.,LTD
-5-
5 Page 
Confidential
Fig.9 PFC block timing diagram (ZC)
Insert a limiting resistor between control winging and ZC. This resistance has following two roles.
1. Turn on the gate at the lowest point of the Drain-Source voltage of MOSFET.
2. The resistor limits the current on ZC to +/-5mA or less, that is maximum allowable current on
ZC.
2.3.5 PFC over current protection
PFC over current protection is provided by monitoring the CSP voltage determined by resistors .
Connected between source of PFC MOSFET and GND. MOSFET turns OFF by detecting CSP
voltage exceeding the over-current threshold voltage as shown in Fig.10.
To prevent malfunction of over-current protection caused by noise just after turn ON, Leading edge
blank time (LEB) is adopted.
Connect a capacitor of around 0.1uF close to CSP to prevent malfunctions due to noise.
Adding a resistor RCSP2 of around 10ohm is more effective for the prevention.
For designing the circuit, refer to section 3.4.
Fig.10 CSP circuit example and timing diagram
SHINDENGEN
ELECTRIC MFG.CO.,LTD
- 11 -
11 Page | ||
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| PDF Descargar | [ Datasheet MCZ5205SE.PDF ] | |
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