STWBC2-HP datasheet(90/96 Pages) STMICROELECTRONICS

90 / 96 page

Contents

Block diagrams ...................................................................3

1.1

STWBC2-HP architecture ....................................................... 3

1.2

Typical application.............................................................. 4

1.2.1

Qi single coil, fixed frequency full-bridge, USB powered ........................... 4

1.2.2

Qi single coil, variable frequency full-bridge, USB powered......................... 5

Analog Front-End (AFE) ...........................................................6

2.1

Analog AFE functions ........................................................... 6

2.1.1

Power management ...................................................... 6

2.1.2

Reset strategy........................................................... 7

2.1.3

Buck Boost DC-DC analog section ........................................... 8

2.1.4

Analog monitors ......................................................... 9

2.1.5

Analog demodulators .................................................... 15

2.1.6

Quality factor driver ...................................................... 17

2.1.7

LED/buzzer driver ....................................................... 18

2.1.8

USB detection .......................................................... 18

2.1.9

Gate drivers ........................................................... 20

2.1.10

PLL .................................................................. 20

2.1.11

GPIO................................................................. 21

2.1.12

Control of analog functions ................................................ 22

2.2

Digital AFE functions .......................................................... 23

2.2.1

Main PWM ............................................................ 25

2.2.2

Phase demodulator ...................................................... 32

2.2.3

QF controller ........................................................... 35

2.2.4

Gate driver mode, IO mode and mux ........................................ 38

2.2.5

ADC_MUX ............................................................ 41

2.2.6

LED_SPK pattern generator ............................................... 42

2.2.7

BB-DCDC ............................................................. 44

2.2.8

VDoubler.............................................................. 52

2.2.9

ITC (Interrupt Controller) .................................................. 53

2.2.10

Protection ............................................................. 55

2.2.11

NVM control logic ....................................................... 58

STWBC2-HP

Contents

DS13825 - Rev 1.0

page 90/96

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