ST STDES-50W2CWBC - Figure 14. STDES-50 W2 CWBC Circuit Schematic (3 of 4)

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Figure 14. STDES-50W2CWBC circuit schematic (3 of 4)

DC-DC BOOST SYNCHRONOUS

DC-DC SHORT

R304

10 K

R302

0 R

R301

0 R

Q 301

STL20N6F7

C302

X7R

50V

100NF

R303

10 K

R305

10 R

Q 300

STL20N6F7

R300

0.010R/2W

C312

C313

C0G

50V

1NF

L300

3.3uH

R306

10 R

C315

X7R

50V

10NF

R307

10 R

C309

X7R

50V

100NF

C314

X7R

50V

10NF

C310

50V

CO G

1NF

R410

100 K

D400

10V

Q 404

P-M O S

10K

2 3

Q 405

NPN

R411 10 K

C304

X7S

50V

10UF

C308

47UF

50V

VIN

G D_HS 1

G D_LS1

VIN_ISNS _ P

VIN_ISNS _ N

SW _HS 1

VDCDC

VIN

DCDC_SHO RT

VBRIDG E

TN1399 - Rev 1

page 14/26

TN1399

Schematic diagrams

Main Page

Overview2
Figure 1. STDES-50W2CWBC Reference Design2
Figure 2. Block Diagram of a Typical Power Transfer System2
Specifications3
Figure 3. STDES-50W2CWBC Main Blocks3
Test Setup4
Test Conditions and Equipment4
Procedure4
Table 1. Test Equipment4
Table 2. Test Tools4
Table 3. Internal Voltage Range4
Table 4. Power-On LED Status5
Table 5. Presence Detection Specifications5
Table 6. Level of the STSC Power Supplies5
Measurements/Waveforms/Test Data6
STWBC2-HP Startup Waveform6
Presence Detection Waveform6
Figure 4. Typical Startup Waveform: Power-On Sequence6
Power Transfer Switching Waveform7
Figure 5. Presence Detection Waveform7
Figure 6. Coil 1 in Half-Bridge Mode8
Figure 7. Coil 2 in Half-Bridge Mode8
STSC Waveform9
Figure 8. Coil 1 in Full-Bridge Mode9
Figure 9. Coil 2 in Full-Bridge Mode9
ASK Demodulation Waveform10
Figure 10. Power Automatic Boost (5-20 V)10
Figure 11. ASK Demodulation Frame10
Q-Factor Accuracy Test11
Table 7. Q-Factor Accuracy Test with RMB Coins11
Schematic Diagrams12
Figure 12. STDES-50W2CWBC Circuit Schematic (1 of 4)12
Figure 13. STDES-50W2CWBC Circuit Schematic (2 of 4)13
Figure 14. STDES-50W2CWBC Circuit Schematic (3 of 4)14
Figure 15. STDES-50W2CWBC Circuit Schematic (4 of 4)15
Bill of Materials16
Conclusions20
Appendix A Reference Design Warnings, Restrictions and Disclaimer21
Revision History22
Table 8. Document Revision History22
Table of Contents23
List of Tables24
List of Figures25

ST STDES-50W2CWBC - Figure 14. STDES-50 W2 CWBC Circuit Schematic (3 of 4)

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