STEVAL-IHT001V1 STMicroelectronics, STEVAL-IHT001V1 Datasheet - Page 11

• Manufacturer Part Number: STEVAL-IHT001V1
• Description: EVAL BOARD THERMO CONTROL REFRIG
• Manufacturer: STMicroelectronics

Specifications of STEVAL-IHT001V1

• Design Resources: STEVAL-IHT001V1 Gerber Files STEVAL-IHT001V1 Schematic STEVAL-IHT001V1 Bill of Materials
• Main Purpose: Reference Design, ARM7 Thermostat for Fridge or Freezer
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ACS102-6, ACS110, ACST6, ST7LITE39F2
• Primary Attributes: Compressor, Defrost & Light Controls
• Secondary Attributes: Graphical User Interface
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5514

UM0277
3
3.1
3.2
Getting started
Load power
Initially, there is no heat sink mounted on the TO220-AB of the ACST6-7ST device. In this
case, Figure 2.1 of their datasheet shows that the maximum permanent allowed current is
1.5 A RMS, for an ambient temperature lower than 40 °C. If the ACST6-7ST must sink a
higher current, or works at a higher temperature, a heat sink can be added. Also refer to
AN1354 for more information on single-phase compressor control.
The ACS102-6TA, in a TO-92 package, can withstand a 0.2 A RMS permanent current up to
an ambient temperature of 90 °C. The ACS102-6TA can drive the common light bulbs found
in Fridge or Freezer without any problem. Indeed, a 25 W bulb will always sink a current
lower than 150 mA. The ACS110-7SB2, in DIL-8 package, can withstand a 1 A RMS
permanent current up to an ambient temperature of 90 °C. In this case, the ACS102-6TA
can drive a maximum 200W defrost resistor. Moreover, this AC switch can drive a fan (with a
RMS current lower than 1 A) instead of a defrost resistor without any additional snubber.
Measure points
Figure 5
defines the measurement points.
Figure 5.
shows the GND map and where the test points are placed on the board.
Measurement points (top layer view)
Getting started
Table 4
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