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精密可控硅恒温控制器
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● 外部 元件 少
● 可 变 的 oN/oFF周 期
● 对 于 阻 性 负 载 ,oN/OFF周 期 均
由整 数 个 电 力 周 期组 成
● 对 于 感 性 负 载 ,ON周 期 包 括 奇
数 个 半 周 期 ,OFF周 期 包 括 奇 数
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● 交 流 电 源 供 电 ,无 直 流 元 件
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● H^steresis可 以 由 外 围 器 件 提 供
● 负 向可控硅 门驱 动
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或 PTc热 敏 电 阻 传 感 器 的 精 密 温 度 控 制
的 可 控 硅 触 发 。它 的 应 用 范 围 包 括 需 要
过 零 触 发 的加 热设 备 、 风扇 马 达 、或 其
它 复杂 的负载 。
它 适 用 于 比较 多 的 阻 性 或 其 它 传 感
器 ,使 用 平 衡 电 流 比 较 器 输 入 电 路 ,使
来 自传 感 器 的 电 流 和 固 定 电 阻 的 电 流 进
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可 控 硅 的 驱 动 电路 可 以 以 过 零 触 发
(zero crosshg)的 方 式 驱 动 阻 性 负 载 ,或 通
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⒊1脚 位 图
,
⒊2管 脚 描 述
sYMBOL
Ts
vCC
PIN
1
MOD
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2
REs
3
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n.c
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Ls
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SB
6
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7
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CAP
8
n.c
9
Ls
10
定 时 电容
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12
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VFF
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15
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TS
16
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OM1682T so16
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OM1682
OM1682A
Draft Data Sheet
INTEGRATED CIRCUIT
2004 Jul 26
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Precision
triac control thermostat
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INTEGRATED ELECTRONIC SOLUTIONS
1BUTLER D RIVE
HENDON SA 5014
AUSTRALIA
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Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
CONTENTS
12.2.2
12.3
12.3.1
12.3.2
12.3.3
Repairing soldered joints
SO
Reflow soldering
Wave soldering
Repairing soldered joints
1
FEATURES
2
GENERAL DESCRIPTION
3
PINNING INFORMATION
3.1
3.2
Pinning layout
Pin description
13
DEFINITIONS
14
IES INFORMATION
4
ORDERING INFORMATION
15
DISCLAIMER(1)
5
BLOCK DIAGRAM
6
FUNCTIONAL DESCRIPTION
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
OM1682 and OM1682A
VCC - Common, positive DC supply
VEE - Negative DC supply, substrate
TS and LS - Synchronisation from triac and line
PWR - Power supply boost
TRG - Triac gate drive
SA and SB - Sensor inputs
CAP - Timing capacitor
RES and MOD - Select Resistive or Reactive
load firing
Resistive loads
Reactive loads
OM1682A Pins
SW Control function switch
LOT Logical output
LIN Logical input
6.9.1
6.9.2
6.10
6.10.1
6.10.2
6.10.3
7
IMPORTANT: ELECTRICAL SAFETY
WARNING
8
LIMITING VALUES
9
CHARACTERISTICS
10
APPLICATION INFORMATION
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.10
10.11
Design considerations
Circuit configurations
Power supply requirements
Gate drive
Operating mode at switch on
Zero-crossing detection
Reactive loads
Sensor circuits
Common connection to load, triac, and sensor
Using the Logical output and input controls in
the OM1682A
Application circuits
11
PACKAGE OUTLINES
12
SOLDERING
12.1
12.2
12.2.1
Introduction
DIP
Soldering by dipping or by wave
2004 Jul 26
(1) The contents of this document are subject to the disclaimer
on page 24
2
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
1
OM1682 OM1682A
2
FEATURES
• Low external component count
The OM1682 (and OM1682A bonding variant) is a
monolithic bipolar circuit for triggering a triac in
applications where accurate control is required from a
sensor such as an NTC (Negative Temperature
Coefficient) or PTC thermistor. It is suitable for a broad
range of applications, extending from the zero-crossing
control of a heating element, to the control of fan motors or
other complex loads. The OM1682A has additional logic
control access, allowing monitoring of the input, and
external control of the triac drive.
• Variable ON and OFF cycle times
• With a resistive load, ON and OFF cycles always consist
of an integral number of full mains cycles
• With an reactive load the ON period always has an odd
number of half cycles, and the OFF period an even
number (vice versa with the MOD option)
• No DC component in the AC supply current
• On chip circuit protection against triac gate spikes
It is designed to accept a wide variety of resistive and other
sensors, using a balanced current comparator input circuit
in which a signal current derived from the sensor is
compared with the current derived from a resistor.
• Low supply current
• Supply boost capability
• Sensor AC powered, thus minimising DC supply and
filtering needs
The triac firing circuit is arranged to zero-crossing fire a
resistive load; or by the use of option connections, can
control reactive loads. It gives a controller circuit using a
minimum number of components, yet allows considerable
flexibility in the application configuration.
• Hysteresis available from external circuit elements
• Negative triac gate drive (avoids insensitive quadrant
operation)
3
3.1
GENERAL DESCRIPTION
PINNING INFORMATION
Pinning layout
3.2
Pin description
SYMBOL
PIN
DESCRIPTION
SW
1*
Switch to enable external logic
MOD
2
Mode select
SW *
1
16
TS
2
RES
3
Res/Ind load select
MOD
15
VCC
LOT
4*
Logical output
RES
3
14
n.c.
TRG
5
Triac gate drive
LOT *
4
13
PWR
SA
6
Sense Input A
SB
7
Sense Input B
CAP
8
Timing capacitor
TRG
5
SA
6
OM1682
OM1682A
12
n.c.
11
VEE
SB
7
10
CAP
8
9
LS
LIN *
pin1682
* = not connected on OM1682
Fig.1 Pin configuration
LIN
9*
Logical input
LS
10
Line sensing
VEE
11
Negative supply
n.c.
12
not connected
PWR
13
Supply boost
n.c.
14
not connected
VCC
15
Positive Common
TS
16
Triac sense
* connected in the OM1682A only.
2004 Jul 26
3
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
4
OM1682 OM1682A
ORDERING INFORMATION
PACKAGE
TYPE
NUMBER
NAME
DESCRIPTION
VERSION
OM1682P
DIP16
plastic dual in-line package; 16 leads (300 mil)
SOT38-1
OM1682T
SO16
plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
OM1682AP DIP16
plastic dual in-line package; 16 leads (300 mil)
SOT38-1
OM1682AT SO16
plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
5
BLOCK DIAGRAM
SA
SB
CAP
6
7
8
sensor inputs
rectifier
difference amp
MOD
RES
2
3
level detector
ON/OFF
latch
filter
cycle
timing
mode
resistive/
inductive
load
LOT
4*
OM1682A
logic control
switch
SW
1*
control
logic
LIN
gate pulse synch
9*
* OM1682A (not connected on OM1682)
low supply inhibit
power
supply
rectifiers
stabilized
D.C.
supply
11
15
13
V EE
VCC
PWR
10
LS
mains zero
and load
voltage detect
16
5
TS
TRG
Fig.2 Block diagram
2004 Jul 26
triac gate
driver
4
block1682
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
6
6.1
FUNCTIONAL DESCRIPTION
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
OM1682 OM1682A
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.
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.
6.4
6.3
VEE - Negative DC supply,
substrate
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.
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.
VSS
-
Lp
Tp
+
+
PWR
TS
LS
-
Ln
Tn
+
+
psp1682
VEE
Fig.3 OM1682 power supply circuit
2004 Jul 26
5
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
See Figure 3, 0M1682 Power Supply
Circuit. A resistor network taken
between terminal T2 of the Triac (TS)
or the load or AC supply (LS) and
VEE provides the zero-crossing
signals. As the AC signal passes
through zero, comparators provide
control signals Tp (when VTS > VCC)
and Tn (when VTS < VEE) indicating
whether the voltage on TS or LS is
greater or less than VCC or VEE
respectively. A resistor network
ensures that these switching points
correspond to equal positive or
negative thresholds about the AC
zero thus giving a symmetrical
zero-crossing drive to the triac gate.
For a resistive load the zero-crossing
information for the triac gate drive is
obtained from pin LS. In circuits
where the triac and the control circuit
are connected to one side of the AC
supply, LS also provides power and
zero-crossing information while the
triac is off, and no connection is
needed to TS. However for reactive
loads it provides the gate control
signals during the ON period.
Synchronisation is obtained from the
threshold comparators at the levels of
VCC and VEE on the chip.
Adjustment of the switching point, and
hence the firing pulse width and
symmetry about the zero crossing
point is possible by varying the values
of the resistors connected between
TS and the triac T2, the resistor to
VEE, and the resistor to VCC; and LS
to the load, VEE and VCC.
With a resistive load, when the triac
has switched on and an AC signal is
no longer available on T2 of the triac,
the synchronisation information, and
the power supply are derived via pin
LS from either the load, or from the
AC supply (depending on the circuit
configuration used). The series
resistor to the load (or AC supply),
together with resistors from pin LS to
VEE and to VCC, are chosen to be
suitable values to generate the triac
2004 Jul 26
OM1682 OM1682A
gate pulse about the zero-crossing
point to ensure reliable firing of the
triac.
In the circuit configuration in which
the signal for LS is derived from
across the load, there will be no AC
signal until the triac has fired.
Therefore, while the triac is OFF,
synchronising information and the DC
power supply is derived from the AC
signal that is then present across the
triac via pin TS.
6.5
PWR - Power supply boost
An AC signal applied to this terminal
provides additional DC power supply
current using on-chip rectifiers. This is
usually provided via an additional
resistor connected from the PWR pin
to the AC supply. See Figure 3,
OM1682 Power Supply Circuit.
If the OM1682 is able to operate with
narrow gate drive pulses, and only
requires a small average DC supply
current, then there may be sufficient
power available from the
synchronising drive resistors to LS
and TS. However large magnitude
triac trigger pulses or extended pulse
widths to reach triac latching current
levels with light loads may require
additional power sourcing via this
terminal. This will be especially so
with reactive loads, with resistive
loads drawing low currents (less than
400 VA), or with triacs specified for
low gate trigger current sensitivity. No
synchronising signals are derived
from the PWR terminal.
6.6
TRG - Triac gate drive
The triac gate output drives the gate
through a current setting resistor. It
has in-built protection to withstand
transient voltage signals which may
be induced on the gate of the triac by
mains transients during firing. The
gate drive current should be set to a
value suited to the gate sensitivity of
the triac used. The firing pulse width
will need to be of such a width that the
6
specified latching current of the triac
when used with the design load has
been reached before the gate pulse
ends. The average current this
requires may preclude the powering
of the circuit during the ON cycle from
the LS pin supply alone (to achieve
the required gate pulse width), and an
additional DC boost may be needed
from the PWR terminal.
With a resistive load the triac is fired
at all times with a signal applied to the
gate during the zero-crossing of the
mains. However, with an reactive load
the current is no longer in phase with
the supply voltage across the load;
and there is no signal available to
indicate that the current is
approaching zero at the end of each
conducting half-cycle. When the
current fails below the triac holding
current, the triac switches off, and the
supply voltage at that time appears
across the triac. When configured to
fire reactive loads, the OM1682
detects the presence of this voltage
by the signal on pin TS when the triac
turns off, and acts to re-apply the gate
signal until the signal on TS falls,
indicating that the triac has fired. The
gate drive is held on for short delay
time after the voltage on T2 fails to
ensure the triac current has reached
its latching point.
With an reactive load there is a
transient voltage present on the triac
T2 during the conduction period, and
radio frequency interference (RFI)
suppression and suitable snubbing
measures may be needed.
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
SA
OM1682 OM1682A
SB
VCC
VCC -0.6 V
+
VEE +1.2 V
ON/
OFF
latch
+
VEE
capcct1682
CAP
Fig.4 Sensor current comparator circuit
6.7
SA and SB - Sensor inputs
The sensor inputs are symmetrical
current inputs designed to accept
AC signals referenced to common.
See figure 4, Sensor current
comparator circuit
By not using the DC supply rail to
drive the sensing inputs, problems
associated with providing sufficient
DC current to drive the sensor and
associated networks over the full
operating range are avoided. In
addition by providing balanced
differential inputs operating at close
to the VCC rail potential, control
signals which either increase or
decrease with the parameter to be
regulated (temperature, pressure,
humidity etc.) can be handled.
A sensitive sensor can be used
together with a level setting variable
2004 Jul 26
resistor in a bridge arrangement. A
resistor can apply a current
proportional to the voltage across
the AC sensor to one of the two
sensing inputs, and another equal
resistor will give a current derived
from the voltage on the setting
resistor to the other. The circuit will
be balanced when the two input
currents are equal, and any change
in the sensor resistance will
generate a difference signal
between the input currents to SA
and SB. This difference is integrated
in a capacitor connected to pin CAP.
When the current into pin SA is
greater that the current into pin SB,
the voltage on pin CAP will be driven
negative towards the OFF threshold
comparator. When the current
difference is reversed, and the
current into SB is the greater, then
7
the current difference will charge
CAP positively towards the upper
ON threshold.
A typical circuit will power this
sensing circuit via a high value
resistor taken from the AC supply.
While the circuit is in balance the
timing capacitor voltage remains
steady, but once the sensed
parameter changes and causes an
imbalance, then the capacitor will
charge or discharge depending on
which input current is the greater as
a result of the imbalance, and after a
delay reach the threshold voltage
and initiate a change from ON to
OFF or vice-versa.
The charging or discharging current
is the difference between the two
current input signals applied to SA
and SB.
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
An imbalance (apart from that
resulting from the action of the
sensor) between the currents applied
to SA and SB can be created by an
additional resistive path that
introduces an AC signal from the AC
signal across the triac when it is off to
add to the signal already present in
SA or SB. This imbalance can be
used to increase the hysteresis
around the control point, or to
decrease it and to force more
frequent cycling between the ON and
OFF cycles. In the application circuit
where the sensor is powered from
across the triac (OFF period) or from
across the load (ON) then suitable
selection of fixed resistor values give
this electronically induced imbalance.
The timing capacitor connected to the
CAP terminal provides inherent
filtering of the sensing signal, and as
the SA and SB inputs are driven by
AC signals, filtering of transient
interference signals is inherent in this
circuit. However they may also be
driven from a positive DC sourcepossibly from a remote sensor with its
own power supply, and still have the
advantage of the inherent
interference rejecting characteristics
of the timing capacitor.
PIN CONNECTION
RES
MOD
OM1682 OM1682A
Only the positive half of the input
cycle is used to generate the
difference between SA and SB: on
the negative half cycle the voltage is
clamped to one VBE below the VCC
rail.
6.8
CAP - Timing capacitor
The timing capacitor is connected
from CAP to either VEE (substrate,
−ve) or VCC (common, +ve). The
charging and discharge times of this
capacitor set the ON and OFF cycle
times and give minimum times
proportional to the capacitance
values as well as to the maximum
difference in current levels at which
the two sensor inputs are driven.
The charging and discharging
periods, that is the ON or OFF times,
vary with the magnitude of the
difference in input currents applied to
SA and SB from the sensor. When the
capacitor charges towards the VCC
rail, and reaches an upper threshold
of one VBE below the VCC rail, then
the request for firing latch is set in the
ON condition; the control circuit is
ready to start an ON cycle at the next
appropriate zero-crossing of the
mains supply. See figure 4, Sensor
Current Comparator Circuit.
TYPE OF
LOAD
high (true) high (true) resistive
The ON period is synchronised with
the mains zero crossing signals so
that with a resistive load an integral
number of full cycles makes up the
ON period, and no DC signal is
generated in the supply line. With an
reactive load the OM1682 uses either
an odd number of half cycles during
the ON period, with an even number
in the OFF period, or vice-versa. This
ensures that for an reactive load
every ON period starts by conducting
in the opposite direction to the first
half cycle of the previous ON period.
During the ON cycle, the imbalance in
the input signal currents that caused
the capacitor to charge to the upper
threshold voltage, will change, and
the new difference between the
signals into SA and SB discharges
the capacitor, with the voltage on the
CAP pin approaching the VEE rail.
The lower threshold is two VBE above
VEE, and when this threshold is
reached the latch which was set by
the request for an ON cycle is reset.
When the ON latch is reset, the timing
circuit stops driving the gate only after
the programmed even or odd number
of conducting half cycles.
OPERATING MODE
Start on triac zero crossing, run on load signal zero crossing
high (true) low (false) resistive
Start and run on supply signal zero crossing
low (false) high (true) leading
Odd number of ON half cycles, even number of OFF cycles
low (false) low (false) leading
Even number of ON half cycles, odd number of OFF half cycles
low (false) high (true) lagging
Even number of ON half cycles, odd number of OFF half cycles
low (false) low (false) lagging
Odd number of ON half cycles, even number of OFF cycles
6.9
RES and MOD - Select
Resistive or Reactive load
firing
The OM1682 provides for four
different modes of operation; two for
use with resistive loads and two for
2004 Jul 26
use with reactive loads. These modes
are selected by pins RES and MOD.
These pins are logically true when left
open (high) and false when shorted to
VEE (low). RES false (low) selects
the reactive modes.
8
6.9.1
RESISTIVE LOADS
With RES true (high) all triggering
occurs at zero crossings as sensed
by TS or LS, and both ON and OFF
periods have a duration of an integral
number of AC supply cycles. With a
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
suitable choice of component values
triggering pulses during the ON
period begin before the true zero is
reached so that the ON state of the
triac is maintained as the current falls
below the holding current level and
continues into the new half cycle until
the triac latching current is reached.
is maintained until the voltage sensed
by TS fails. A small trigger turn off
delay is implemented so that the triac
current has time to reach the latching
level. The circuit logic ensures that
the first half cycle of each ON period
is of opposite phase to that of the first
half cycle of the previous ON period.
With MOD false the circuit operates in
a conventional zero crossing mode
with crossings sensed via LS; see
Fig.5. The sense line TS is unused
and may be left open. In this mode it
is necessary that T1 of the triac and
VCC of the circuit are connected to
one line of the AC supply.
The state of the MOD pin influences
the end point of a firing burst. With
MOD true the interval within which
triggering pulses are generated
terminates as the voltage sensed by
LS enters the zero crossing region in
the same direction as at the
commencement of the burst. Thus the
trigger pulses are generated during
an even number of mains half cycles.
If the load is slightly leading then the
load current will cross zero slightly
before the end of the interval and
another half cycle of triac conduction
will be generated and the triac is ON
for an odd number of half cycles. With
a slightly lagging load the zero
crossing occurs just beyond the
trigger pulse interval and another
conduction half cycle is not produced.
The total number of half cycles of
conduction is then even.
The second resistive mode with MOD
true (Fig.7) is provided for
applications in which it is convenient
to have a common connection
between one terminal of the sensor
element and one terminal of the load.
This is achieved by referencing the
control circuit to the junction of the
triac and the load. Now there is no
single synchronising signal available
both while the triac is ON and while it
is OFF, It is therefore necessary to
sense the voltage across the triac via
a resistive network to TS while the
triac is OFF, and to sense the voltage
across the load via a resistive network
to LS while the triac is ON.
6.9.2
REACTIVE LOADS
With RES false (low) the circuit is
configured for use with reactive load
(Fig.6). With reactive loads it is
necessary that T1 of the triac and VCC
of the circuit are connected to one line
of the AC supply. The initial trigger of
an ON period occurs at a zero
crossing sensed by LS. With lagging
loads current will continue to flow
through the load during the next AC
supply zero crossing and fall below
the triac holding current some time
later. When this point is reached the
voltage across the triac rises, is
sensed via TS, and causes a
re-triggering pulse for the triac which
2004 Jul 26
With MOD false the burst interval
terminates as the voltage sensed by
LS enters the zero crossing region in
the opposite direction as at the
commencement of the burst. Thus
with leading loads the burst will
comprise an even number of
conduction half cycles whereas
lagging loads will have an odd
number.
Conduction bursts of an even number
of half cycles appear to result in a
zero DC component averaged over a
single ON periods but this is severely
disturbed by the inequality of current
waveforms in the first and subsequent
half cycles. A zero average is still
maintained over two consecutive ON
periods. Careful waveform analysis
shows that the magnitudes of low
frequency waveform components are
9
the same for bursts of odd and even
numbers of half cycles. But with
bursts of an odd number of cycles the
first half cycle of an ON period is in the
opposite phase to the last half cycle of
the previous ON state thus minimising
problems of remanence with loads
containing magnetic materials.
6.10
OM1682A Pins
There are 3 addtional pins connected
in the OM1682A to offer greater
control and flexibility in application.
These are as follows.
6.10.1
SW CONTROL FUNCTION
SWITCH
If this pin is connected to VEE then
the OM1682A options are enabled. If
SW is open, then an internal path is
established within the OM1682A that
connects the output of the ON/OFF
latch directly to the triac drive circuit.
6.10.2
LOT L OGICAL OUTPUT
The LOT logical output is an open
collector transistor (emitter to VEE)
capable of sinking 50 µA when ON.
If SA is greater than SB then the
ON/OFF latch is driven to the OFF
state. In this condition with ISA > ISB
then the transistor will be on, pulling
the LOT pin down to VEE.
LOT may be connect to LIN, and in
this arrangement will function
normally as the OM1682, except
there is the possibility to hold the triac
drive OFF by driving this connection
with an external signal to also pull this
common connection low. In this
connection an external pull-up
resistor is not required.
Alternatively, because the SA and SB
input circuit is symmetrical,
exchanging SA and SB will invert the
function of LOT, providing a logic
signal which can drive logic
processing circuits external to the
OM1682A.
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
The LOT signal is still present even
when SW is open, although in this
configuration the LOT signal drives
the triac output circuit internally, and
LIN is prevented from functioning.
For supply voltage magnitudes less
than the internal supply inhibit
threshold, but sufficient for internal
circuit operation, LOT is forced low.
6.10.3
LIN LOGICAL INPUT
The LIN logical input provides access
to the triac synchronization and
7
OM1682 OM1682A
output drive circuit. While the triac
drive is synchronous with mains
current zero crossing, the LIN signal
is not required to be synchronous,
and its state is only used when the
next appropriate opportunity occurs to
start a sequence of triac conducting
half cycles, or to conclude an
operating burst. The state of the
internal supply inhibit circuit is also
taken into account.
(about 2.5 V), above an input
threshold of 2 x VBE.
LIN can be driven by a standard
CMOS output port, with a pull down
input current of typically 3 µA. If pulled
up to VCC the input junctions are
reverse biased and there is no input
current.
If open circuit, LIN is pulled high
above VEE to a level of 4 x VBE
IMPORTANT: ELECTRICAL SAFETY WARNING
OM1682 and OM1682A circuits are connected to the mains electrical supply and operates at voltages which need to be
protected by proper enclosure and protective covering. Application circuits for OM1682 and OM1682A should be
designed to conform to relevant standards (such as IEC 65, or Australian Standards AS3100, AS3250 and AS3300), it
should only be used in a manner that ensures the appliance in which they are used complies with all relevant national
safety and other Standards.
It is recommended that a printed circuit board using this integrated circuit be mounted with non-conductive clips, and
positioned such that the minimum creepage distances from the assembly to accessible metal parts, and between high
voltage points cannot be transgressed.
It should be noted that as there are Mains Voltages on the circuit board adequate labelling should be attached to warn
service personnel, and others, that this danger exists.
A control board assembly should be mounted, preferably vertically, with sufficient free air flow across its surface to
prevent the heat dissipated in various components from causing an unacceptable rise in the ambient temperature. The
triac also needs to have an adequate heatsink, as exceeding its rated maximum junction temperature can result in loss
of control, unpredictable behaviour, and possible dangerous conditions.
The board should be mounted in a place that is clean and dry at all times, not subject to condensation or the accumulation
of dust and other contaminants.
2004 Jul 26
10
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
8 LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
I
DC current (any pin except 5 and11)
−
20
mA
I
DC current (pins 5 and 11)
−
70
mA
VCAP
Voltage range CAP, pin 8
V8−15
V11−0.8
+0.8
V
VSA
Voltage range SA, pin 6
V6−15
−0.8
+0.8
V
VSB
Voltage range SB, pin 7
V7−15
−0.8
+0.8
V
VTRG
Voltage range TRG, pin, transient
V5−15
V11−30
+50
V
VMOD
Voltage range MOD, pin 2
V2−11
−0.8
+0.8
V
VRES
Voltage range RES, pin 3
V3−15
−0.8
+0.8
V
VSW
Voltage range SW, pin 1, see note 1
V1−15
−0.8
+0.8
V
VLOT
Voltage range LOT, pin 4, see note 1
V4−15
V11−0.8
+0.8
V
VLIN
Voltage range LIN, pin 9, see note 1
V9−15
V11−0.8
+0.8
V
Ptot
total power dissipation
−
−
300
mW
Tstg
storage temperature
−40
+150
°C
Tamb
operating ambient temperature
0
+125
°C
Note
1. Pins 1, 4 and 9 (SW, LOT, and LIN) are only connected in the OM1682 A. These pins are not bonded in the OM1682.
9 CHARACTERISTICS
At Tamb = 25°C; Voltages are specified with respect to VCC.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Power supply
−VEE
dc supply voltage clamp
regulated dc supply
voltage
6.0
6.5
7.0
V
−IEE
quiescent current
with pins SA, SB and
TRG open circuit
−
−
200
µA
−Vinh
internal supply inhibit voltage
voltage less than VEE
clamp voltage
−
-VEE+1
−
V
IG
gate current (triac T1 to VCC)
set by RG connected from −
TRG to gate
−
50
mA
tW(g)
gate pulse width
reactive mode
130
160
250
µs
Gate drive
Power sensing inputs LS and TS
VUT
upper threshold
−
0
−
mV
−VLT
lower threshold
−
VEE
−
V
ISA = ISB = +50 µA
−
0
−
mV
Measuring inputs SA and SB
VS
Voltage
VOS
Offset voltage, VSA - VSB
ISA = ISB = +100 µA
−5
−
+5
mV
IS(peak)
Peak sense input current
IS = ISA +ISB
−
−
500
µA
2004 Jul 26
11
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
SYMBOL
ICAPoffset
PARAMETER
OM1682 OM1682A
CONDITIONS
MIN
TYP
MAX
−2.2
0
+2.2
ISA = ISB = +100 µA
−
0.9
−
Offset current (as a % of ISA or ISB, where
ICAPoffset = (ICAP /ISA) x 100%, measured at
ISA = ISB = +100 µA dc)
UNIT
%
Timing capacitor
ICAP/(ISA −ISB) Charge current ratio
OM1682A control functions
ILOT(low
logical output pull down current
VLOT = VEE +0.5 V
50
−
−
µA
ILOT(high)
logical output high leakage
VLOT = VCC
−
−
1
µA
ILIN(low
logical input current (low)
VLIN = VEE
−
3
−
µA
ILIN(high)
logical input current (high)
VLIN = VCC
−
−
1
µA
VLIN(threshold)
logical input voltage threshold
with respect to VEE
0.8
1.2
1.6
V
10 APPLICATION INFORMATION
10.1
Design considerations
Resistors connected directly to the
AC supply rail should be specified to
withstand the voltage. It is
recommended that Philips
Components VR37 (or VR25)
high-ohmic / high-voltage resistors be
used. These resistors meet the safety
requirements of a number of
international standards on high
voltage applications.
These circuits are designed to
demonstrate the flexibility of
applications using the OM1682 and
OM1682A. No attempt has been
made to use the minimum number of
components, although there are
opportunities to reduce the
component count by using resistors
for multiple functions. There can be
some interaction with reduced
accuracy, and a good understanding
of the OM1682 and OM1682A is
required to find the most cost efficient
design.
circuit in figure 5, OM1682 Application
Diagram: Resistive Heating Load,
referenced to mains. An alternative
circuit in which the T2 of the triac and
the load are both connected to the
supply, is shown in figure 7; here the
controller, and temperature sensor
are connected to the junction of the
load and triac terminal T1. Other
circuit configurations will depend on
whether the load is resistive, and
zero-crossing fired, or is reactive and
must be fired as soon as possible
after the current has fallen to zero and
the triac has switched off (for example
figure 6).
10.3
Power supply requirements
Circuit configurations
The DC power supply current
available for the operation of the
circuit is derived from the resistors
connected to the TS and LS
terminals, plus boost power if needed
from PWR. On the negative half cycle
of the AC signals applied to these
resistors, the current into the OM1682
charges the 100 µF power supply
capacitor connected between VCC
and VEE.
Triac control circuits usually have the
load connected between the mains
supply and T2 of the triac, and the
controller together with triac terminal
T1 are connected to the other side of
the supply. This is the application
Apart from the current required by the
chip, the triac gate drive presents the
major DC current requirement of the
circuit. As the gate pulse must be
wide enough for the load current to
reach the triac's specified holding
10.2
2004 Jul 26
12
current, this may be a significant load
on the DC supply (especially with
small resistive and reactive triac
loads). Hence the provision of the
PWR terminal which may be needed
for circuits requiring wider gate drive
pulses.
For moderate supply requirements
without separate power boost it is
recommended that PWR be
connected to LS.
10.4
Gate drive
The 300 Ω gate resistor shown in the
application circuits gives a little over
10 mA gate drive. Thus for the circuit
shown a triac would need to be
specified that is suitable for 10 mA
triggering with negative triggering
signal for both positive and negative
voltage on T2. From the threshold
levels determined from the resistive
networks on LS and TS and the AC
supply, the gate pulse width can be
calculated (assuming a sine wave
supply). The specification of the triac
will indicate the latching current for
switch-on, and knowing the minimum
load with which the circuit is to
operate, then proper design will
ensure that the gate pulse is not
removed before the triac current
reaches this figure.
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
10.5
Operating mode at switch
on
The return connection of the capacitor
connected to the CAP terminal may
determine whether the OM1682 is in
an ON or an OFF cycle once the
power supply reaches its operating
voltage after the supply voltage is
applied.
The application circuits show the
capacitor connected to VEE, so that it
will initially be in the OFF mode at
switch on. With connection of the
capacitor between the CAP pin and
VCC, at mains switch ON the CAP will
be in the ON mode. If the power
supply voltage rises more slowly than
the capacitor on pin CAP, then when
the circuit starts operation, the
voltage on CAP may have already
reached a level sufficient to change
the state of the ON/OFF latch.
10.6
Zero-crossing detection
The two thresholds at which the
zero-crossing of the input voltages on
LS and TS are sensed are the two
supply rails, VCC and VEE. This
means that a network of resistors is
required to ensure switching at the
same threshold above the VCC
common positive rail as below it. In
the circuits shown in Fig.5, Fig.6 and
Fig.7, two 220 kΩ resistors are used.
One is connected between the AC
supply and the input pin LS or TS, and
the second from the pin to VEE (the
negative DC supply rail of the chip).
The positive threshold is therefore an
equal voltage above VCC due to the
divider action of the resistors, while
the negative threshold is still equal to
VEE as at this point no current is
flowing in the second resistor.
If a third resistor is added to each
network from the input pin LS or TS to
VCC suitable values can be
calculated to give equal positive and
negative thresholds larger than the
DC supply voltage of VCC − VEE. For
example, if VCC − VEE = 7 V, and
2004 Jul 26
OM1682 OM1682A
the resistor to the supply is 220 kΩ
from LS, then in Fig.5 where the
resistor from LS to VEE is the same
(220 kΩ), the upper threshold is +7
volts, and the lower one −7 volts.
However if the resistor between LS
and VEE is only 110 kΩ, and a further
resistor of 220 kΩ is connected
between LS and VCC, then the
thresholds are ±14 volts.
Note that the current flowing in the
second resistor causes a negligible
loss to the DC supply, as the voltage
across it is limited to approximately
VCC − VEE.
10.7
Reactive loads
The circuit of Fig.6: OM1862
application diagram; refrigerator
control, referenced to mains, shows
the changes made from Fig.5 to use
the OM1682 with an reactive load.
The RES terminal is taken to VEE to
set the reactive triggering option, and
the synchronising signals are needed
from across the triac to provide the
feedback for the circuit to apply the
triggering pulses to the triac.
10.8
Sensor circuits
In all of the circuits shown the sensor
is common to the VCC and triac T1
terminals. Other circuits can use the
sensor in series with one of the input
pins SA and SB. In the same way,
because the input circuit is
symmetrical, sensors which generate
signals varying in the opposite
direction (for example positive
temperature coefficient resistors) can
be accommodated by exchanging the
inputs. Lower impedance sensors
may also be used with suitable
modifications to the input circuit.
In Fig.5 and Fig.6 AC feedback can
be taken from the triac T2 to the
junction of the sensing resistor, or the
variable resistor (for example via a
10 MΩ resistor), and in this way
enhance, or reduce the hysteresis of
the sensing circuit.
13
10.9
Common connection to
load, triac, and sensor
See the circuit in Fig.7 OM1682
Application Diagram: Sensor and
Control Circuit Common to both Load
and Triac. This permits remote
mounting of the sensor and a heater
or other load with only three
connections.
Because the AC sensor drive is taken
from the AC signal across the triac
while the triac is OFF, and from
across the load while it is ON, this
permits adding an out of balance AC
signal into the sensing circuit to
increase or decrease the effective
hysteresis while the control circuit is
cycling. In Fig.7 this is shown by the
use of 470 kΩ resistors in the sensor
bridge circuit except for one which is
420 kΩ, and thereby introduces 10%
hysteresis by deliberately driving the
input circuit further out of balance as
soon as it switches.
10.10 Using the Logical output
and input controls in the
OM1682A
The Logical output and input facility
connected on the OM1682A offers
considerable flexibility in allowing
easy interfacing with external control
circuits.
Figure 9 shows a timing circuit with a
press button start that runs for a fixed
time before locking out until the button
is pressed again. In addition to the run
timer which can be set for a period
between 1 and 4 hours, it has light
emitting diode indication of mains
presence, timer running, and power
on the load.
In figure 10 the LOT signal trips a
latch as soon as the thermostat input
reaches a set temperature, turning
the triac drive OFF. A start button will
begin another cycle.
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
10.11 Application circuits
ACTIVE
R1
VR37
330k
R9
VR37
180k
R2
VR37
470k
LOAD1
LOAD
R3B
15M
LOAD2
R4A
220k
RES
SA
Vx
3
MOD
2
6
OM1682
Vy
SB
11
15
VEE
CAP
NTC1
100k
TR1
BT139X
-600E
5 TRG
8
230 V
MAINS
16 TS
IC1
7
R5A
220k
NTC1
PWR
13
10 LS
VCC
R13
300Ω
RV1
4k7
lin
RL2B
θ
R10
270k
R7
7k15
NTC2
NEUTRAL
C2
100µF
10V
C1
220nF
25V
Circuit for 1 kW water heater
o
90 to 105 C
heat-cct
Fig.5 Application diagram: Resistive heating load, referenced to mains
ACTIVE
R1
VR37
270k
R9
VR37
220k
R8
VR37
220k
R2
VR37
330k
LOAD1
LOAD
R3A
2M7
C4
100nF
250Vac
RL1
R4B
220k
RES
SA
3
MOD
2
6
PWR
13
10 LS
R11
VR37
220k
Vy
OM1682
SB
Vx
R5B
220k
NTC1
R6
13k
θ
RV1
4k7
lin
IC1
TR1
BT139X
-600E
5 TRG
8
11
CAP
NTC1
2k2
16 TS
7
VEE
LOAD2
15
VCC
R13
300Ω
R14
220Ω
230 V
Carbon
MAINS
Composition
C3
100nF
250Vac
RL2B
R16
270k
R7
5k4
R10
91k
R12
220k
NTC2
NEUTRAL
C2
100µF
10V
C1
220nF
25V
Refrigerator compressor control
0 to 10 oC, >250 VA compressor
Fig.6 OM1682 application diagram; refrigerator control, referenced to mains
2004 Jul 26
14
fridge-cct
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
420
kΩ
OM1682 OM1682A
470
kΩ
RES
470 kΩ
Vy
SA
3
MOD
6
OM1682
470 kΩ
Vx
SB
300
Ω
5 TRG
8
11
CAP
15
220
kΩ
VCC
VEE
θ
150
kΩ
220
kΩ
NTC
sensor
470
kΩ
triac
220 kΩ
16 TS
IC1
7
47
kΩ
230 V
AC
PWR
13
10 LS
2
100 µF
10 V
220
nF
470
kΩ
LOAD
220
kΩ
3-wire-Rload
Heating circuit with a resistive load.
Fig.7 OM1682 Application diagram: Resistive load, sensor and control circuit common to both load and triac
420
kΩ
470
kΩ
RES
470 kΩ
Vy
SA
3
MOD
2
6
OM1682
100nF
250
vac
470 kΩ
Vx
47
kΩ
230 V
AC
SB
PWR
13
10 LS
100Ω
Carbon
composition
300
Ω
16 TS
IC1
5 TRG
7
8
11
CAP
VEE
θ
100nF
250
vac
15
VCC
220
kΩ
150
kΩ
220
kΩ
NTC
sensor
470
kΩ
triac
220 kΩ
470
kΩ
100 µF
10 V
220
nF
LOAD
220
kΩ
3-wire-cct
Cooling circuit for fan or refrigerator load.
Fig.8 OM1682 Application diagram: Reactive load, sensor and control circuit common to both load and triac
2004 Jul 26
15
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
R1
470k
VR25
R2
220k
VR37
OM1682 OM1682A
R10
150k
VR37
R3
220k
VR37
Push
to
Run
HEATER
LOAD
230V
1500W
R11
150k
VR37
R4 10M VR25
R5
220k
230 V
ac
R6
220k
R7
3k6
R8
470k
VR25
R9
100k
θ
NTC
10k
RV1
Set
temp
4k7
VCC
D1A
BAV99
D1B
BAV99
R16
22k
C1
100
µF
SA
SB
6
RES
3
OM1682A
7
CAP8
C2
220
nF
16
IC1
4
LOT
TS
R12
150k
LIN
15
11
VCC
VEE
T5
BC858
TR1
5 TRG
9
POWER
ON
TRIAC
BT139F
600E
R13 220
RV2 Set time R17
1 to 4 hours 220k
1MΩ
C4
100nF
RTC 1
A0
12
CTC 2
RS 3
A1
13
VDD
14
MODE
10
R14
470k
HEF4541B
IC2
5
AR
6
MR
R19
220k
R20
100k
C5
10nF
R22
470 C6
k 100
9 PH
nf
R24
470k
8O
7
VSS
T1
BC848
R23
220k
D2A
BAV
99
R21
220k
T2
BC
858
LED
Red
HEATER
ON
T3
BC
848
D2B
BAV
99
R25
220k
T4
BC848
R26
100k
Tmed-cct.ai
VEE
Fig.9 Application diagram: OM1682A with run timer and LED indication
2004 Jul 26
LED
Yellow
TIMER LED
Green
R15 ON
470k
T6
BC848
R18
1M
C3
100nF
MOD SW
2
1
D3
BAS16
Z1
BZX84
C20
PWR
13
10 LS
16
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
R1
470k
VR25
R2
220k
VR37
OM1682 OM1682A
R10
150k
VR37
R3
220k
VR37
Push
to
Run
HEATER
LOAD
230V
1500W
R4 10M VR25
R5
220k
230 V
ac
R6
220k
R7
3k6
R8
470k
VR25
R9
100k
θ
NTC
10k
RV1
Set
temp
4k7
SA
SB
6
RES
3
C2
220
nF
PWR
13
10 LS
OM1682A
7
CAP8
MOD SW
2
1
IC1
4
LOT
9
LIN
16
TS
5 TRG
15
11
VCC
VEE
R11
150k
TRIAC
BT139F
600E
TR1
R12 220
VCC
D1A
BAV99
D1B
BAV99
R13
22k
C1
100
µF
R14
470
k
R16
470
k
R17
470
k
HEF4093B
IC2
T2
BC848
VEE
R15
150
k
T1
BC848
C3
100
nF
Monost-cct.ai
Fig.10 Application diagram: OM1682A with one-shot run up to a set temperature.
2004 Jul 26
17
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
11 PACKAGE OUTLINES
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
D
E
A
X
c
y
HE
v M A
Z
16
9
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
1
L
8
e
0
detail X
w M
bp
2.5
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
10.0
9.8
4.0
3.8
1.27
6.2
5.8
1.05
1.0
0.4
0.7
0.6
0.25
0.25
0.1
0.7
0.3
0.01
0.019 0.0100 0.39
0.014 0.0075 0.38
0.16
0.15
0.050
0.039
0.016
0.028
0.020
0.01
0.01
0.004
0.028
0.012
inches
0.069
0.010 0.057
0.004 0.049
0.244
0.041
0.228
θ
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT109-1
076E07S
MS-012AC
2004 Jul 26
EIAJ
EUROPEAN
PROJECTION
ISSUE DATE
95-01-23
97-05-22
18
o
8
0o
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
DIP16: plastic dual in-line package; 16 leads (300 mil); long body
SOT38-1
ME
seating plane
D
A2
A
A1
L
c
e
Z
b1
w M
(e 1)
b
MH
9
16
pin 1 index
E
1
8
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
min.
A2
max.
b
b1
c
D (1)
E (1)
e
e1
L
ME
MH
w
Z (1)
max.
mm
4.7
0.51
3.7
1.40
1.14
0.53
0.38
0.32
0.23
21.8
21.4
6.48
6.20
2.54
7.62
3.9
3.4
8.25
7.80
9.5
8.3
0.254
2.2
inches
0.19
0.020
0.15
0.055
0.045
0.021
0.015
0.013
0.009
0.86
0.84
0.26
0.24
0.10
0.30
0.15
0.13
0.32
0.31
0.37
0.33
0.01
0.087
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT38-1
050G09
MO-001AE
2004 Jul 26
EIAJ
EUROPEAN
PROJECTION
ISSUE DATE
92-10-02
95-01-19
19
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
12 SOLDERING
12.1
Introduction
There is no soldering method that is
ideal for all IC packages. Wave
soldering is often preferred when
through-hole and surface mounted
components are mixed on one
printed-circuit board. However, wave
soldering is not always suitable for
surface mounted ICs, or for
printed-circuits with high population
densities. In these situations reflow
soldering is often used.
This text gives a very brief insight to a
complex technology. A more in-depth
account of soldering ICs can be found
in our “IC Package Data book” (order
code 9398 652 90011).
12.2
12.2.1
DIP
SOLDERING BY DIPPING OR BY
WAVE
The maximum permissible
temperature of the solder is 260 °C;
solder at this temperature must not be
in contact with the joint for more than
5 seconds. The total contact time of
successive solder waves must not
exceed 5 seconds.
The device may be mounted up to the
seating plane, but the temperature of
the plastic body must not exceed the
specified maximum storage
temperature (Tstg max). If the
printed-circuit board has been
pre-heated, forced cooling may be
necessary immediately after
soldering to keep the temperature
within the permissible limit.
12.2.2
REPAIRING SOLDERED JOINTS
Apply a low voltage soldering iron
(less than 24 V) to the lead(s) of the
package, below the seating plane or
not more than 2 mm above it. If the
temperature of the soldering iron bit is
less than 300 °C it may remain in
contact for up to 10 seconds. If the bit
temperature is between
2004 Jul 26
OM1682 OM1682A
300 and 400 °C, contact may be up to
5 seconds.
12.3
12.3.1
SO
REFLOW SOLDERING
Reflow soldering techniques are
suitable for all SO packages.
Reflow soldering requires solder
paste (a suspension of fine solder
particles, flux and binding agent) to be
applied to the printed-circuit board by
screen printing, stencilling or
pressure-syringe dispensing before
package placement.
Several techniques exist for
reflowing; for example, thermal
conduction by heated belt. Dwell
times vary between
50 and 300 seconds depending on
heating method. Typical reflow
temperatures range from
215 to 250 °C.
Preheating is necessary to dry the
paste and evaporate the binding
agent. Preheating duration:
45 minutes at 45 °C.
12.3.2
WAVE SOLDERING
Wave soldering techniques can be
used for all SO packages if the
following conditions are observed:
• A double-wave (a turbulent wave
with high upward pressure followed
by a smooth laminar wave)
soldering technique should be
used.
• The longitudinal axis of the
package footprint must be parallel
to the solder flow.
• The package footprint must
incorporate solder thieves at the
downstream end.
During placement and before
soldering, the package must be fixed
with a droplet of adhesive. The
adhesive can be applied by screen
printing, pin transfer or syringe
20
dispensing. The package can be
soldered after the adhesive is cured.
Maximum permissible solder
temperature is 260 °C, and maximum
duration of package immersion in
solder is 10 seconds, if cooled to less
than 150 °C within 6 seconds. Typical
dwell time is 4 seconds at 250 °C.
A mildly-activated flux will eliminate
the need for removal of corrosive
residues in most applications.
12.3.3
REPAIRING SOLDERED JOINTS
Fix the component by first soldering
two diagonally- opposite end leads.
Use only a low voltage soldering iron
(less than 24 V) applied to the flat part
of the lead. Contact time must be
limited to 10 seconds at up to 300 °C.
When using a dedicated tool, all other
leads can be soldered in one
operation within 2 to 5 seconds
between 270 and 320 °C.
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
Notes:
2004 Jul 26
21
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
Notes:
2004 Jul 26
22
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
13 DEFINITIONS
Data sheet status
Engineering sample
information
This contains draft information describing an engineering sample provided to
demonstrate possible function and feasibility.Engineering samples have no guarantee
that they will perform as described in all details.
Objective specification
This data sheet contains target or goal specifications for product development.
Engineering samples have no guarantee that they will function as described in all
details.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Products to this data may not yet have been fully tested, and their performance fully
documented.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
14 IES INFORMATION
INTEGRATED ELECTRONIC SOLUTIONS PTY. LTD.
ABN 17 080 879 616
Postal address:
Integrated Electronic Solutions
PO Box 2226
Port Adelaide SA 5015
AUSTRALIA
Street Address:
Integrated Electronic Solutions
1 Butler Drive
Hendon SA 5014
AUSTRALIA
Telephone: +61 8 8348 5200
Facsimile: +61 8 8243 1048
World Wide Web: www.integratedelectronicsolutions.com
Email:
2004 Jul 26
[email protected]
23
Integrated Electronic Solutions, Hendon, South Australia
Draft Data Sheet
Precision triac control thermostat
OM1682 OM1682A
15 DISCLAIMER
Integrated Electronic Solutions Pty. Ltd. ABN 17 080 879 616 ("IES") reserves the right to make changes to both its
products and product data without notice.
IES makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose,
nor does IES assume any liability arising out of the use or application of any IES product. IES specifically disclaims any
and all liability, including without limitation incidental or consequential damages.
Typical performance figures, where quoted may depend on the application and therefore must be validated by the
customer in each particular application. It is the responsibility of customers to ensure that any designs using IES products
comply with good practice, applicable standards and approvals. IES accepts no responsibility for incorrect or
non-compliant use of its products, failure to meet appropriate standards and approvals in the application of IES products,
or for the correct engineering choice of other connected components, layout and operation of IES products.
Any customer purchasing or using IES product(s) for an unintended or unauthorised application shall indemnify and hold
IES and its officers, employees, related companies, affiliates and distributors harmless against all claims, costs,
damages, expenses, and reasonable legal fees arising out of, directly or indirectly, any claim of loss, personal injury or
death associated with such unintended or unauthorised use, even if such claim alleges that IES was negligent regarding
the design or manufacture of the relevant product(s).
Life Support Applications
Products of Integrated Electronic Solutions Pty Ltd (IES) are not designed for use in life support appliances, devices or
systems, where malfunction can result in personal injury. Customers using or selling IES products for use in such
applications do so at their own risk and agree to fully indemnify IES for any damages resulting from such improper use
or sale.
2004 Jul 26
24