M51996AP データシートの表示（PDF） - MITSUBISHI ELECTRIC
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M51996AP Datasheet PDF : 22 Pages
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M51996A
F/B
TO PHOTO
COUPLER
100Ω
C
Fig.39 How to get the narrow pulse width
during the start of operation
How to synchronize with external circuit
Type M51996A has no function to synchronize with external
circuit,however,there is some application circuit for
synchronization as shown in Fig.40.
T-ON
M51996A
CF
T-OFF
RON
CF
ROFF
Q1
SYNCHRONOUS
PULSE
MITSUBISHI (Dig./Ana. INTERFACE)
M51996AP/FP
SWITCHING REGULATOR CONTROL
Driver circuit for bipolar transistor
When the bipolar transistor is used instead of MOS-FIT,the
base current of bipolar transistor must be sinked by the
negative base voltage source for the switching-off duration,in
order to make the switching speed of bipolar transistor fast one.
In this case,over current can not be detected by detecting
resistor in series to bipolar transistor,so it is recommended to
use the CT(current transformer).
For the low current rating transistor,type M51996A can drive it
directly as shown in Fig.42.
COLLECTOR
Vcc
M51996A
VOUT
GND
EMITTER
BIPOLAR
TRANSISTOR
Fig.42 Driver circuit diagram (2) for bipolar transistor
0V
0V
MINIMUM PULSE
WIDTH OF
SYNCHRONOUS
PULSE
MAXIMUM PULSE WIDTH OF
SYNCHRONOUS PULSE
Fig.40 How to synchronize with external circuit
Vcc
-Vss
(-2V to -5V)
COLLECTOR
Vcc
M51996A
VOUT
GND
EMITTER
Fig.41 Driver circuit diagram (1) for bipolar transistor
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