MOC3051SM Fairchild Semiconductor, MOC3051SM Datasheet - Page 7

• Manufacturer Part Number: MOC3051SM
• Description: Triac & SCR Output Optocouplers TRIAC OUTPUT OPTO
• Manufacturer: Fairchild Semiconductor

Specifications of MOC3051SM

• Configuration: 1
• Maximum Input Current: 60 mA
• Maximum Operating Temperature: + 85 C
• Maximum Power Dissipation: 330 mW
• Maximum Reverse Diode Voltage: 3 V
• Minimum Operating Temperature: - 40 C
• Output Type: AC
• Package / Case: PDIP SMD White
• Typical Input Voltage: 1.15 V
• Zero-crossing Circuit: No
• Output Device: Triac
• Isolation Voltage: 5250 Vrms
• Peak Output Voltage (vdrm): 600 V
• Maximum Input Voltage: 1.5 V
• Maximum Output Voltage: 420 VAC
• Minimum Trigger Current: 15 mA (Max)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

©2005 Fairchild Semiconductor Corporation
MOC3051M, MOC3052M Rev. 1.0.5
t(delay), t(f) versus I
The triac driver’s turn on switching speed consists of a
turn on delay time t(d) and a fall time t(f). Figure 9 shows
that the delay time depends on the LED trigger current,
while the actual trigger transition time t(f) stays constant
with about one micro second.
The delay time is important in very short pulsed opera-
tion because it demands a higher trigger current at very
short trigger pulses. This dependency is shown in the
graph I
The turn on transition time t(f) combined with the power
triac’s turn on time is important to the power dissipation
of this device.
ISOL. TRANSF.
0.1
AC
10
1
10
FT
Figure 9. Delay Time, t(d), and Fall Time, t(f),
vs. LED PW.
Switching Time Test Circuit
10k
I
V TM
20
FT
I FT
- LED TRIGGER CURRENT (mA)
t(d)
V TM
vs. LED Trigger Current
SCOPE
t(f)
DUT
30
FT
t f
t d
I FT
100
40
ZERO CROSS
GENERATOR
DETECTOR
FUNCTION
EXT . SYNC
V out
50
115 VAC
PHASE CTRL.
PW CTRL.
PERIOD CTRL.
V o AMPL. CTRL.
60
APPLIED VOLTAGE
WAVEFORM
7
0 VOLTS
1. The mercury wetted relay provides a high speed
2. 100x scope probes are used, to allow high speeds and
3. The worst-case condition for static dv/dt is established
PULSE
INPUT
+400
Vdc
repeated pulse to the D.U.T.
voltages.
by triggering the D.U.T. with a normal LED input
current, then removing the current. The variable R
allows the dv/dt to be gradually increased until the
D.U.T. continues to trigger in response to the applied
voltage pulse, even after the LED current has been
removed. The dv/dt is then decreased until the D.U.T.
stops triggering.
recorded.
MERCURY
WETTED
RELAY
252V
Figure 10. Static dv/dt Test Circuit
RC
R
RC
TEST
is measured at this point and
C TEST
D.U.T.
R = 1k
dv/dt =
V max = 400V
SCOPE
PROBE
X100
www.fairchildsemi.com
0.63V
RC
TEST
=
252
RC