M57950L 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC
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M57950L Datasheet PDF : 5 Pages
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MITSUBISHI HYBRID ICs
M57950L
HYBRID IC FOR DRIVING TRANSISTOR MODULES
EXPLANATION OF FUNCTION
(cf. Fig. 2, 3, 4, and 5)
(1) With low input level (Vin=0 ~ 1V)
Tr1 ...... OFF, Tr2 ...... ON
The base terminal of transistor module is reverse biased with re-
spect to its emitter by reverse power supply VEE.
(2) With high input level (Vin=4 ~ 5V)
Tr1 ...... ON, Tr2 ...... OFF
The base terminal of transistor module is forward biased and
drived by the current IOH through the resistor Rext.
(3) With low input level (Vin=0 ~ 1V)
Tr1 ...... OFF, Tr2 ...... ON
The base terminal of transistor module is reverse biased as
stated in (1) after flowing reverse recovery pulse current IOLP. The
steady reverse base current is limited by the internal base-emit-
ter resistor RBE of the transistor module.
M57950L Typical application circuit
+5V
M57950L
1/2QM50DY etc.
LOAD
IC
IO
DRIVER
TTL etc.
SINK
10mA
INPUT
12
VIN
345678
R2
+
Cext
Rext
VEE
ZD
R1
VO
+
C1
VCC
+
C2
50/60HZ
AC
M57950L Typical operating waveform
VIN
VI
0
–IO
IOH(IB1)
0
IOLP(IB2)
VO
VOH
0
VOL
t
t
t
Note: IOH and IOLP correspond to base forward current IB1
and base reverse current IB2 of the transistor module
to be driven respectively.
Feb.1999
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