STEVAL-IHT003V2 STMicroelectronics

S T E VA L - I H T 0 0 3 V 2 Low loss e-starter evaluation board for compressor starter circuits based on the ACST6 Data brief Description The STEVAL-IHT003V2 evaluation board represents an innovative solution patented by STMicroelectronics to reduce the power losses caused by positive temperature coefficient (PTC) resistors in compressor starter circuits. The solution features an ACST6 AC switch device to turn off the PTC current after motor start-up note that the traditional PTC is still used in the electronic starter circuit as it increases circuit safety for AC switch short-circuits or diode mode failure (ref. EN60335-1). The design reduces starter standby losses from (typ.) 2.5 W to 380 mW for 230 V applications, or 2.5 W to 40 mW for 100 V applications. Features Before using the board with a compressor, the Suitable for refrigerator and freezer PTC behavior must be checked (especially compressor applications VPTC1 and VPTC2 levels) and different R4 Reduces PTC resistor power losses resistor values may be required. RoHS compliant January 2017 DocID030275 Rev 1 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-IHT003V2 1 Schematic diagram Figure 1: STEVAL-IHT003V1 circuit schematic 2/4 DocID030275 Rev 1 J16 3 D1 1 START 1N4007 R2 R1 R3 620 470k 510k J17 3 R6 1 2 1 DF06 47 PTC T2 C4 ACST610-8T PMBT2907A Q1 22n X0202NN MMBF170 R5 D2 M1 T1 Q2 10k R7 1N4148 PMBT2222A J18 3 220 R4 C1 C3 DZ1 30k 1 C2 R8 10n BZX55C xn 1 M RUN 10n GND 0 + - 3 4 A C