HM169-06 Hendon Semiconductors, HM169-06 Datasheet - Page 8

• Manufacturer Part Number: HM169-06
• Description: Temperature Sensor Development Tools OM1682A demoboard
• Manufacturer: Hendon Semiconductors

Specifications of HM169-06

• Maximum Operating Temperature: + 45 C
• Minimum Operating Temperature: 0 C
• Operating Current: 7 mA
• Operating Voltage: 230 V
• For Use With/related Products: OM1682A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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A table of characteristics is given for
typical example applications as
individual application circuits. These
are published as separate data
sheets (types OM169-xx). Note that
these circuits will also depend on the
choice of components external to the
HM169 module, such as the
thermistor to be used and its
suitability for the chosen temperature
range.
The choice of resistor values can be
easily re-calculated to give another
operating temperature (or other
characteristic) depending on the
Table 1 HM169 component list and function
2008 Jul 02, Revision 3.0
R1
R2
R3A
R3B
R4A
R4B
R5A
R5B
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
RL1
RL2A
RL2B
RL3
COMPONENT
CHARACTERISTICS
Resistor for top arm of sensing side of the bridge (NTC side). Mains rated
Resistor for top arm of setting side of the bridge (potentiometer side). Mains rated
Feedback from LOAD. For hysteresis with cooling load. Mains rated
Feedback from LOAD. For hysteresis with heating load. Mains rated
Current drive resistor from setting bridge junction to SA. Heating input sense
Current drive resistor from sensing bridge junction to SA. Cooling input sense
Current drive resistor from sensing bridge junction to SB. Heating input sense
Current drive resistor from setting bridge junction to SB. Cooling input sense
Resistor parallel to potentiometer (adjust range or fixed single setting)
Resistor in series with potentiometer. To set potentiometer adjustment span
Power supply boost resistor. If addition DC power supply is needed. Mains rated
Mains synchronizing and power supply resistor. Mains Rated
Resistor to adjust triac gate drive timing (also for start timing with inductive load). Usually 220 k
Triac T2 feedback resistor for inductive loads. Mains Rated
Resistor to adjust triac gate drive run timing with inductive loads. Usually 220 k
Gate drive setting resistor for the triac
Snubbing resistor for inductive loads. Must be carbon composition
Resistor to replace sensor (NTC thermistor) for simmerstat application
Timing resistor fine adjustment for zero crossing
Link fitted for an inductive load
Link to determine sense of rotation of potentiometer adjustment
Link to determine sense of rotation of potentiometer adjustment
Link to determine control mode with respect to mains cycle polarity
specific needs of a particular
application.
The HM169 uses very small currents,
and generally has a total power
dissipation of less than 1.5 watts.
However the heat dissipated in the
triac is significant, and its heatsink
temperature, and how effectively it is
cooling the triac, must be checked.
After explaining each component
function, application specific
considerations are addressed in the
following section. Some suggestions
are also given for typical values of
resistors.
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DESCRIPTION
Precision electronic thermostat
10 COMPONENT FUNCTIONS
Table 1 lists the components of the
HM169 with a brief description of their
function. By also referring to the
circuit of the HM169 it can be seen
that resistors are used in different
positions to establish the different
required functions. As so many
options need to be covered for all of
the different applications, only a
subset of the possible resistors are
needed in any single specific
application.
Engineering Sample Information
HM169