Componen

t

Value

Manufacturer

Part Number

Notes

C13, C14

2.2µF/25V

Murata

GRM155R61E225KE11D

V1V8 and V5V0 filtering capacitors

C15, C16,

C17

10µF/25V

Murata

GRM188R61E106MA73D

VRECT filtering capacitor

C18, C19,

C20

10µF/25V

Murata

GRM188R61E106MA73D

OUT filtering capacitor

D1, D2

12V TVS

NXP

PESD12VS1UL

ESD protection diodes

D3

Rohm

SML-P12VTT86R

Red LED (output on)

R1

100R

TE Connectivity

CRGP0603F100R

OVP clamping resistor (RCL)

R2

470R

R3, R4, R5

47k

INT and I2C bus lines pull-up resistors

R6

5k1 1%

NTC pin high-side resistor

R7

10k 3%

Murata

NCU18XH103E60RB

NTC resistor (coil temperature sensor)

Componen

t

Value

Manufacturer

Part Number

Notes

L1

8 µH

Wurth

760308102207

Receiving coil (Ls)

C1, C2, C3,

C4

100nF/50V

Murata

GCM155R71H104KE02D

Series resonant capacitor (Cs)

C5

3.9nF/50V

Murata

GRM155R71H392KA01D

Detection capacitor (Cd)

C8, C11

47nF/50V

Murata

GRM155R71H473KE14D

Rectifier bootstrap capacitors

C12

4n7/50V

Murata

GCM155R71H472KA37D

Main LR bootstrap capacitor

C6, C9

22nF/50V

Murata

GRM155R71H223KA12D

ASK modulation capacitors

C7, C10

22nF/50V

Murata

GRM155R71H223KA12D

Auxiliary ASK modulation capacitors

C13, C14

2.2µF/25V

Murata

GRM155R61E225KE11D

V1V8 and V5V0 filtering capacitors

C15, C16,

C17

10µF/25V

Murata

GRM188R61E106MA73D

VRECT filtering capacitor

C18, C19,

C20

10µF/25V

Murata

GRM188R61E106MA73D

OUT filtering capacitor

D1, D2

16V TVS

Littelfuse

SMAJ16A

ESD protection diodes

D3

Rohm

SML-P12VTT86R

Red LED (output on)

R1

100R

TE Connectivity

CRGP0603F100R

OVP clamping resistor (RCL)

R2

470R

R3, R4, R5

47k

INT and I2C bus lines pull-up resistors

R6

5k1 1%

NTC pin high-side resistor

R7

10k 3%

Murata

NCU18XH103E60RB

NTC resistor (coil temperature sensor)

Note:

All the above components refer to a typical application. Operation of the device in the application may be limited

by the choice of these external components (voltage ratings, current and power dissipation capability, etc.).

The basic application schematic is relatively simple, since STWLC68 does not require many external parts to

operate. Anyway, there are different aspects that must be carefully considered to properly design a customized

application. In most of cases the main constrains are the limited PCB size/room and tickness, that unavoidably

lead to crowded solutions with far-from-optimal electrical and thermal performance.

STWLC68

Reference schematic

DS13131 - Rev 3

page 23/32