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PDF MCZ5207SG Data sheet ( Hoja de datos )
| Número de pieza | MCZ5207SG | |
| Descripción | LLC Current resonant bridge controller | |
| Fabricantes | Shindengen | |
| Logotipo |  |
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CAT.No. 1H0100-1E
MCZ5207SG APPLICATION NOTE
LLC
Current resonant bridge
controller
MCZ5207SG
+
MCZ5207SG
Jan.2013 Ver1.0
Vo1
+
SHINDENGEN
ELECTRIC MFG.CO.,LTD
-1-
1 page  
1.2 Block diagram （SOP16）
MCZ5207SG
1
AS OFF
AS ON
2
SS-Reset
charge/
discharge
3
Vsen
ON/OFF
4
Burst ON/OFF
Reset
Latch
Reset
Vc1 st/sp
ON/OFF
Soft Start SS st/sp
Counter reset
Vss
Timer
SST Latch
Counter
x2 times
Internal
Vref
TSD Vc2 OFF
Latch
R Stop
SQ
LLC STOP
S
AS Mode
AS Lin
5
Timer Latch
OCP
Counter
8 times
6
FB
discharge
CSO
charge
7 OCP1
OCP2
didt1
8
OSC
Fixed DT
Control
Logic
Dropper
16
Vc2 st/sp
High Voltage
Driver
15
14
13
Level Shift
12
11
10
9
Fig 1 . MCZ5207SG internal block diagram
SHINDENGEN
ELECTRIC MFG.CO.,LTD
-5-
5 Page 
MCZ5207SG
2.3.4 Dynamic peak current limiting OCP (CS1)
Shorted load protection (OCP1, hereinafter) is a fast response cycle by cycle peak current limiter.
When CS1 terminal voltage reached to CS1 threshold ( +/- 0.5V ), gate drive output is disabled
instantaneously and Ct and also Csst starts to be charged . 0.5V threshold is low enough so
sensing loss is not high even when using current sensing resistor method.
Fig. 7 shows the timing charts of OCP1 operation and Csst charging detail is described in article
2.3.8.
LEB is enabled during FB(top) 4.65V to 4.4V time period. So even heavy non-ZVS surge current
cannot trigger OCP1. From OCP1 detection to Ct charging has 200nsec time delay due to internal
filter.
FBL(Top)
blanking
threshold voltage
4.4 V
OCP blanking period
OCP internal filter delay
FBL(Bottom)
+0.5V
CS1 0V
-0.5V
VGH
VGL
Fig. 7 OCP1 operation timing
2.3.5 Frequency clamped averaging OLP (CS2 and CSO)
The MCZ5207SG has frequency clamped Over Load Protection (OCP2, hereinafter). When CS2
terminal voltage reaches to +/-0.5V, CSO starts to be charged and operating frequency increases
according to CSO terminal voltage increases. Operating frequency and CSO terminal voltage is
shown in Fig. 8
Please be noticed that OCP2 operating point is independent from OCP1, so desired operating
point can be adjusted.
Fig.8 Operating frequency vs CSO terminal voltage
Fig. 9 CSO terminal
SHINDENGEN
ELECTRIC MFG.CO.,LTD
- 11 -
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet MCZ5207SG.PDF ] | |
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