OM1682A Datasheet PDF - IES
| Part Number | OM1682A | |
| Description | Precision Triac Control Thermostat | |
| Manufacturers | IES | |
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Draft Data Sheet
INTEGRATED CIRCUIT
2004 Jul 26
OM1682
OM1682A
Pwrewciwsio.Dn atrtiaacSchoenterot4l tUhe.rcmoomstat
INTEGRATED ELECTRONIC SOLUTIONS
1BUTLER DRIVE
HENDON SA 5014
AUSTRALIA
www.DataSheet4U.com
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Integrated Electronic Solutions, Hendon, South Australia
Precision triac control thermostat
Draft Data Sheet
OM1682 OM1682A
6 FUNCTIONAL DESCRIPTION
6.1 OM1682 and OM1682A
While the OM1682 and OM1682A
use the same bipolar silicon crystal
(die), they are bonded differently at
packaging to offer greater flexibility in
function. The OM1682 has 5 pins not
bonded, and does not offer access to
the ON/OFF output of the input bridge
latch, and neither does it allow an
external logic (ON/OFF) control of the
triac drive. By providing access to 3
additional pins, the OM1682 A offers
a signal indicating the condition of the
input circuit latch as well as a control
facility that permits external switching
of the triac drive output. The addition
3 pins are SW, LOT and LIN.
6.2 VCC - Common, positive DC
supply
The positive DC supply rail for the
control IC type OM1682 is used as
the common reference. This is always
connected to the T1 terminal of the
triac, and being the positive supply
rail allows negative gate drive to the
triac in both positive and negative
supply half cycles on T2. By driving
the triac in this way the insensitive
quadrant (negative T2 voltage, and
positive gate triggering signal) of
triacs is avoided.
6.3 VEE - Negative DC supply,
substrate
This pin connects to the internally
generated and regulated negative DC
supply, and should be bypassed to
VCC (common) by a capacitor of
typically 100 µF. The capacitor needs
to be sufficiently large to maintain the
operating voltage during the half cycle
when it is not being charged, and to
provide the energy to drive the triac
gate during the gate pulse.
Internal supply sensing prevents the
commencement of an ON cycle while
the voltage is too low for reliable
circuit operation. If during an ON
cycle the supply voltage falls below
this level the ON cycle will terminate
at the first opportunity consistent with
the cycle algorithm for the selected
mode.
6.4 TS and LS -
Synchronisation from triac
and line
Two synchronisation inputs provide
both the power supply and signals
indicating the phase and magnitude
of the AC signal on terminal T2 of the
Triac (TS) and the load or AC supply
(LS). Three states, positive, zero and
negative, of each of these signals are
recognised for synchronisation of the
triggering times to the mains.
2004 Jul 26
VSS
PWR
TS
LS
VEE
-
Tp
+
-
Lp
+
-
Tn
+
-
Ln
+
psp1682
Fig.3 OM1682 power supply circuit
5
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| Information | Total 24 Pages | |
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| Download | [ OM1682A.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| OM1682 | The function is Precision Triac Control Thermostat. IES | |
| OM1682A | The function is Precision Triac Control Thermostat. IES | |
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