Signal Consulting, LLC   Model Si5HyUdPTC2-CC-30V-2x16A

Dual, 30V 2x16A, Hybrid, Unidirectional, Proportional, Temperature Controller with Integrated Heat Sink and with 9-Bit Digital Temperature Sensor Port, T-Chip

Si5HyUdPTC2-CC-30V-2x16A Features:   Two 30V 16A DC Ports: Port #1  for TE Cooling and Port#2 is also for TE Cooling . The two ports are  jointly controlled (turned on and off at the same time). Max. Continuous Current: 20A each, with  Heat Sink as shown. Max. Current for 5sec: 40A each, Heat Sinks as shown. Board's Size: 2.4" x 2.3" x1.9" (6.1cm x 5.8cm x4.8cm). Components Type: 100% Solid State, NO Relays, Two 60A MOSFETs.   Closed-Loop Temperature Control in 1/20C Steps, -250C to +1020C Range   Factory Calibrated 9-Bit Digital Temperature Sensor is Immune to Additive Noise   High Power-Efficiency: 97.5% typical, at 30V and 20A On Board: Filter Capacitors VTS diodes Snubber Circuit Ready Voltage Requirement: A single DC Source Voltage (unregulated) with any voltage value from 9V to 30V (for Vp)    Si5HyUdPTC2-CC-30V-2x16A, Spec Sheet  (PDF)

The Si5HyUdPTC2-CC-30V-2x16A is a Dual 30V 2x16A, microprocessor based, Hybrid, Unidirectional, Proportional, Temperature Controller board with an integrated heat sink that uses pulse-width modulation (PWM) to efficiently control the average current flow in two TE (Thermo-Electric) cooling banks. The two banks are connected in parallel, and jointly controlled (turned on and off at the same time). The power flow in each bank is controlled from 0 to 480W power range with 4W steps. Two high-power (55V, 60 A max.) MOSFETs are used (one for each cooling bank) to control the temperature of an enclosed environment. An onboard microprocessor allocates the load-power and controls the temperature. The sample temperature is measured by a small 9-bit digital thermometer Si18DTsens. This sensor uses a unique “1-wire interface” (with parasite power mode) that requires only 2-conductors for reliable remote (long as 20 meters) temperature sensing. The term proportional controller implies that the value of the average load current used is proportional to the difference between the actual and desired temperature. Five PWM duty-cycle values are used depending on the absolute-value of the difference between the set and measured temperature values (|Td|). The duty-cycle is 0% when |Td|<=0⁰C; 25% when 0⁰C< |Td|<0.5⁰C; 50% when 0.5⁰C< |Td|<1C⁰; 75% when 1⁰C< |Td|<1.5⁰C; 100% when |Td|>1.5⁰C. This method allows a uniform temperature control in the -25⁰C to +102⁰C Range, with 1/2⁰C accuracy. As the name hybrid (Hy) implies, the desired temperature value is derived from a variable analog-voltage, while all other control-signals are digital. The desired temperature (Set-Temperature) value is adjusted by an on-board 25 turn trim-pot (P1). An onboard Red LED is used to monitor the Cooler Port #1 voltage, while a Yellow Green is used for the Cooler Port #2. This board requires a single 9V to 30V DC power source (unregulated and unfiltered) at a 0A to 32A current range to operate normally. A small (2.3”x2.4”x0.45”) finned integrated heat sink is included with mounting hardware (as shown on the photograph) to operate at 2x16A or 960W power level. Higher power-levels (30V, 2x20A or 1200W) can be achieved with more efficient heat-sinks. Please click on this link and read the Board Mounting Instructions and Heat Sink Selection Guide. Typical applications are: DC Resistive Heat Controller, Thermo-Electric Cooler Controller, etc. This board can be configured and programmed to perform efficiently in many customized applications.

Set-Temperature Adjustment with Trim-Pot P1: The minimum voltage that trim-pot P1 can be adjusted to is 0.00V DC at pin A5 test point. This minimum voltage corresponds to -25 Degree C Set-Temperature. The operating temperature of +21 Degree C (or +70F) corresponds to 1.730V DC at pin A5 test point. Accordingly, adjust the P1 trim-pot to 1.730V DC on A5 for a proper operating Temperature of +21 Degree C (or +70F).The maximum voltage that the trim-pot can be adjusted to is 3.25V or +61.5 Degree C. The slope of this temperature function is: 0.03761V/C

A Typical Application of the Si5HyUdPTC2-CC-30V-2x16A

In this cooling application, the temperature of the enclosed environment is proportionally controlled by two TE banks (each in the 0 to 480W power range) and by the Si5 board. The desired temperature is linearly adjusted with the on-board trim-pot (P1) from -25⁰C to +61.5⁰C Temperature Range, in 1/2⁰C Steps. The 9-bit digital temperature sensor can be purchased from us (see Parts Department Si18DTsens). The TE Cells can be purchased from Melcor Corp. Trenton, NJ 08648 USA, www.melcor.com .

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