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OM1895 PDF даташит

Спецификация OM1895 изготовлена ​​​​«IES» и имеет функцию, называемую «Simmerstat Control IC».

Детали детали

Номер произв OM1895
Описание Simmerstat Control IC
Производители IES
логотип IES логотип 

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OM1895 Даташит, Описание, Даташиты
Draft Data Sheet
INTEGRATED CIRCUIT
2003 May 09
OM1895
ww.DataSheet4U.comSimmerstat control IC
wINTEGRATED ELECTRONIC SOLUTIONS
1BUTLER DRIVE
HENDON SA 5014
AUSTRALIA
www.DataSheet4U.com









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OM1895 Даташит, Описание, Даташиты
Integrated Electronic Solutions, Hendon, South Australia
Simmerstat control IC
CONTENTS
1
2
3
4
4.1
4.2
5
6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
7
8
9
10
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
11
12
13
13.1
13.2
13.2.1
13.2.2
13.3
13.3.1
13.3.2
13.3.3
14
15
16
FEATURES
GENERAL DESCRIPTION
ORDERING INFORMATION
PINNING INFORMATION
Pin description
Pinning layout
BLOCK DIAGRAM
FUNCTIONAL DESCRIPTION
VCC Common, positive DC supply
VEE Negative DC supply, substrate
PWR Power supply and synchronisation from the mains supply line
RESET /Ext_Reset status and control
MODE external triac ON/OFF, or function
POT Triac drive control input
TRG Triac gate drive
PX triac gate pulse width external setting
IMPORTANT: ELECTRICAL SAFETY WARNING
LIMITING VALUES
CHARACTERISTICS
APPLICATION INFORMATION
Design considerations
MODE function
Potentiometer circuits for limiting the power range
Gate drive
Pulse width extension
Power supply requirements
Startup reset
Zero-crossing detection
Inductive loads
APPLICATION CIRCUITS
PACKAGE OUTLINES
SOLDERING
Introduction
DIP
Soldering by dipping or by wave
Repairing soldered joints
SO
Reflow soldering
Wave soldering
Repairing soldered joints
DEFINITIONS
IES INFORMATION
DISCLAIMER
2003 May 09
2
Draft Data Sheet
OM1895









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OM1895 Даташит, Описание, Даташиты
Integrated Electronic Solutions, Hendon, South Australia
Simmerstat control IC
Draft Data Sheet
OM1895
1 FEATURES
rfi elimination triac drive circuit
Low external component count
Low supply current required
Variable ON and OFF cycle times
External ON/OFF triac control available
No DC component in the AC mains supply
The ON period always has an odd number of half cycles,
and the OFF period an even number
Gate pulse width may be externally set
Negative triac gate drive (avoids insensitive quadrant
operation)
Versions available with slower cycle times to meet EMC
flicker regulations
2 GENERAL DESCRIPTION
The OM1895 is a precision low power simmerstat control
IC for triggering a triac in applications where variable ON
and OFF cycle time is required. It is suitable for a broad
range of applications, extending from the zero-crossing
control of a heating element, a fan motor and other
complex loads.
Because the operation of the OM1895 uses characteristics
of triacs which are common to typical triacs, but may show
some variation in triacs designed to emphasise specific
uncommon features, it is preferable to use triacs which
have been characterized and specified as suitable for use
in this application.
The triac firing circuit uses a unique circuit arrangement by
which load current zero crossing is detected, and a
widened gate pulse applied during the critical current zero
crossing period. Triac conduction is therefore maintained
throughout the zero crossing time, ensuring that rfi
transients are not generated during this time. With
inductive loads only the final half cycle that ends an ON
period (made up of an odd number of mains half cycles),
will finish with a voltage transient. This may still need a
snubber network to limit dv/dt, although it will not be
required for the consecutive conducting half cycles during
the ON time.
The OM1895 provides a triac controller which offers
circuits using a minimum number of components, yet
giving great flexibility and accuracy in triac controlled
applications.
3 ORDERING INFORMATION
TYPE
NUMBER
OM1895P
OM1895T
OM1895 A
OM1895 B
OM1895 C
OM1895 D
NAME
DIP8
SO8
PACKAGE
DESCRIPTION
plastic dual in-line package; 8 leads (300 mil)
plastic small outline package; 8 leads; body width 3.9 mm
ZAP1 & ZAP2 open circuit
ZAP1 open circuit & ZAP2 connected to VEE
ZAP1 connected to VEE & ZAP2 open circuit
ZAP1 & ZAP2 connected to VEE
VERSION
SOT97-1
SOT96-1
cycling time 0.64s
cycling time 5.12s
cycling time 40.96s
cycling time 327.6s
2003 May 09
3










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