PDF《TC7718FTG》

6 Power configuration TC7718FTG 2018-04-24

10 8.4 Filter The TC7718FTG can take the communication signal form the coil of receiving side by the built-in LPF and the comparator. And it converts this signal to the logic signal and output it to the MCU. All internal circuits connected to VIN pin and IIN pin have same constructions. When COMP_EN_IN pin inputs high level, the logic signal is outputted to the MCU. And when COMP_EN_IN pin inputs low level, the logic signal stops outputting. 8.4.1 Filter characteristic Figure

7 shows the filter characteristic of LPF with the peripheral circuits of table 3. Table

3 Peripheral circuit value of Low Pass Filter Symbol No Value Unit Ri

20 kΩ Rf

20 kΩ Ci

47 nF Cf

1200 pF Figure

7 Filter characteristic TC7718FTG 2018-04-24

11 + - IIN/VIN IINF/VINF TC7718FTG + - + - Hysteresis Adjuastmemt circuit VDD33 HYS COMP_OUT COMP_EN_IN Ci Ri Cf Rf 8.4.2 Configuration The gain of the internal OPAMP and the hysteresis of the comparator can be adjusted by the external circuit. 8.5 Level shifter The TC7718FTG incorporates the level shifter that converts the signal level from the MCU to the level which can be control the SW. It controls the SW that switches two or more coils. The signal is only the single way from the MCU to the SW. Logic is not inverted between input and output. (When H is input, H is output, and when L is input, L is output.) Gain adjustment Hysteresis adjustment Level Shifter LS1_IN LS2_IN LS1_OUT LS2_OUT Figure

8 Filter adjustment circuit Figure

9 Level shifter TC7718FTG 2018-04-24

12 9. Absolute maximum ratings (Ta= 25°C) Table

4 Absolute maximum ratings Characteristics Symbol Rating Unit Supply voltage PVDD -0.3 to 5.5 V VCC -0.3 to

28 V Input voltage (Note 1) VIN -0.3 to VDD33+0.5 V Output voltage

1 (Note 2) VOUT1 -0.3 to VCC+0.5 V Power consumption (Ta=25°C) PD 2.8 W Soldering temperature (10s) TSOLDER

260 °C Storage temperature Tstg -40 to

150 °C Operating temperature Topr -40 to

85 °C (Note) The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceeded, even for a moment. Do not exceed any of these ratings. Exceeding the rating (s) may cause the device breakdown, damage or deterioration, and may result injury by explosion or combustion. Please use the IC within the specified operating ranges. (Note 1) All input pins (Note 2) Apply to HDRV [3:1], LDRV [3:1], LS1_OUT, and LS2_OUT 9.1 Operating Conditions Table

5 Operating Conditions (Ta = 25°C) Characteristics Symbol Min Typ. Max Unit VCC Operating voltage VCC 4.5 - 25.0 V PVDD Operating voltage PVDD 4.5 - 5.3 V TC7718FTG 2018-04-24

13 10. Electrical characteristics 10.1 DC electrical characteristics Table

6 DC electrical characteristics (Unless otherwise specified, VCC = 19.0V, PVDD = 5.0V, COUT = 1.0μF, Ta = 25°C) Characteristics Symbol Test condition Min Typ. Max Unit VCC starting voltage (UVLO release) VCCstr - 4.1 4.3 4.5 V VCC_UVLO operating voltage VCCuvlo - 3.8 4.0 4.2 V PVDD starting voltage (UVLO release) PVDDstr - 4.1 4.3 4.5 V PVDD_UVLO operating voltage PVDDuvlo - 3.8 4.0 4.2 V VCC consumption current ICC Output pin: Open - 0.6 1.2 mA PVDD consumption current IDD Output pin: Open - 1.0 1.5 mA LDO Output voltage VDD33 Iout33 = 0mA 3.0 - 3.6 V Output current Iout33 Vdrop = 165mV

60 - - mA Load regulation Load33 PVDD = 5V Iout33 = 0mA ? 60mA - -

165 mV Input / Output pin characteristics High-level input voltage *1 VIH - VDD33*0.75 - VDD33 V Low-level input voltage *1 VIL -

0 - VD........