STEVAL-ISB027V1

S T E VA L - I S B 0 2 7 V 1 Qi A11 wireless charger transmitter evaluation board based on STWBC Data brief Description The STEVAL-ISB027V1 is a Qi 5 Watt wireless battery charger transmitter evaluation board based on the STWBC digital controller for wireless battery charger transmitters. The solution is certified in accordance with the Qi standard, A11 topology. The STEVAL-ISB027V1 provides a complete kit which includes the STWBC IC, firmware, layout and tools. The layout is based on a cost-effective 2-layer PCB. Features Tools for the STEVAL-ISB027V1 are available on www.st.com, and allow users to access run time STWBC digital controller information such as the current power delivered 5 W output power or the FOD status. The STWBC firmware offers Qi 1.1.2 A11 certified users the flexibility to modify the behavior of the Foreign object detection (FOD) LEDs or GPIOs, while adding customizable IC Resistive and capacitive modulation and UART communication. Active presence detector Turn-key & FW APIs complete kit (IC, firmware, tools) RoHS compliant March 2015 DocID027320 Rev 3 1/6 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ISB027V1 1 Schematic diagram Figure 1: STEVAL-ISB027V1 circuit schematic (1 of 3) GSPG1812140915SG 2/6 DocID027320 Rev 3 TP14 WIRE SOLDER VDD STWBC 5V R24 +5 V D C 270NH R25 R34 R46 R47 R29 TP2 220K 100K 100K 1K 10K STWBC Digital Controller VMAIN D3 U3 C20 6.2V R27 100NF C19 1UF C21 10K 31 22 100NF VOUT DIGIN 0 23 TP13 DIGIN 1 SWIM 27 R31 SWIM WIRE SOLDER 28 26 + C17 C18 RESET 47K NRST DIGIN 2 3 47UF 100NF I2C SDA/DIGIN 4 4 DNBL I2C SCL/DIGIN 5 21 CURRENT DEMOD UPBL DRIVEOUT 0 24 DRIVEOUT 1 VMAIN 25 8 UPBR DRIVEOUT 2 CPP INT 3 5V 5 9 DRIVEOUT 3 CPP INT 2 DNBR 2 10 1 PWM AUX/GPIO 2 CPP REF 11 CPP INT 1 SYMBOL DETECT2 12 TP3 J3 CPP INT 0 SYMBOL DETECT1 R26 1 32 UART TX 180K 4 1 TANK VOLTAGE TP4 UART RX 5 6 R35 100K GPIO 0 1 7 15 GPIO 1 TANK VOLTAGE 16 R36 100K VBRIDGE 17 TP7 SPARE ADC 18 COIL TEMP LEDR NTC TEMP 19 ISENSE 20 VMAIN ISENSE R40 VMAIN R38 1.8K STWBC R39 50K 1.8K Layout Note: VDD STWBC VDD STWBC D4 Please Place NTC RED D5 Very very close J5 GREEN to the Main Coil I2C SDA J4 1 R41 I2C SCL R48 U4 C25 VDD STWBC 2 R49 1 LEDR SWIM 1 +IN V+ 5 3 IDEMOD 100K 2 4 + 3 TP10 RESET 2 V- 100NF 1M 100K 4 SWIM CONN C33 - CURRENT DEMOD 3 -IN OUT 4 R30 SWIM CONN 100K 33NF LMV931 C26 TP6 R52 1NF C27 22K 47PF C22 C24 100PF 100NF D7 2 3 R51 330R 1 BAV99W Layout note : GND reference of the Op Amp inputs have to be connectedn i star ground connection with the GND plan of the power bridge. 1 1 1 1 1 33 VSS 30 29 VSS VDD 14 13 VSSA VDDA I2C SDA I2C SCL USER 1 NTC