CWT500

CWT500® Datasheet Qi Compliant 5W Wireless Power Transmitter IC General Description CWT500 can deliver up to 5W as a highly-integrated single-chip wireless medium power transmitter IC. It can be configured to receive its input power from USB or AC adapter. Our chip integrates a power amp driver and communication controllers which use Amplitude Shift Keying (ASK). Our chip includes a 32-bit ARM Cortex M0 processor in order to offer high level of programmability according to its applications. Communication and control units (CCU) can accommodate WPC protocol including fault condition handling associated with power transfer. The CCU supports the foreign object detection (FOD) extension. Also, the chip includes overtemperature and voltage protection. Features Overview   WPC-1.2.4 compliant for A11 low power  Current sensing specification  Over voltage protection High-efficiency power transfer system  Over current limit supporting baseline power profile ( VTS_COLD CELFRAS, Inc. -7- CWT500 Datasheet (Rev 1.0) CWT500 Qi Compliant 5W Wireless Power Transmitter IC -30 3.3 111.3 3.9 47 68 1.429 -20 3.3 67.8 3.9 47 68 1.278 -10 3.3 42.5 3.9 47 68 1.109 0 3.3 27.3 3.9 47 68 0.938 10 3.3 18.0 3.9 47 68 0.782 20 3.3 12.1 3.9 47 68 0.648 30 3.3 8.31 3.9 47 68 0.541 40 3.3 5.83 3.9 47 68 0.460 50 3.3 4.16 3.9 47 68 0.399 60 3.3 3.02 3.9 47 68 0.354 70 3.3 2.23 3.9 47 68 0.321 80 3.3 1.67 3.9 47 68 0.296 90 3.3 1.27 3.9 47 68 0.278 100 3.3 0.98 3.9 47 68 0.265 110 3.3 0.76 3.9 47 68 0.255 120 3.3 0.60 3.9 47 68 0.247 Send EPT packet VTS_HOT < VEXT_TS < VTS_COLD Normal charging operation VEXT_TS < VTS_HOT Send EPT packet Table 1. EXT_TS Thermal Protection Design Example In this example, the hot temperature threshold TTS_HOT and the cold temperature threshold TTS_COLD are designed to be 80℃ and -10℃ respectively. You can change the hot and cold temperature threshold according to your application by changing the related resistors. 3.6 PCB Layout Guide  Keep the trace resistance as low as possible on large current nets associated with the external power MOSFETs.  Resonant capacitor CP needs to be as close to the device as possible.  Boost capacitors (CBOOST1, CBOOST2) need to be as close to the device as possible.  Output regulating capacitors CLDO_IN, CLDO_OUT, CLDO33 and CLDO18 need to be as close to the device as possible. CELFRAS, Inc. -8- CWT500 Datasheet (Rev 1.0) CWT500 Qi Compliant 5W Wireless Power Transmitter IC 4. Package Outline Figure 4. QFN 40-pin Package Outline, 5.0mm x 5.0mm, 0.4mm pitch Figure 5. QFN 40-pin Bonding Diagram CELFRAS, Inc. -9- CWT500 Datasheet (Rev 1.0) CWT500 Qi Compliant 5W Wireless Power Transmitter IC 5. Electrical Characteristics 5.1 Absolute Maximum Rating PIN Parameter Rating Unit ENB, PA_GH2, PA_BST2 PS_SW2, PA_SW1, PA_BST1, PA_GH1, PA_BRG IS_INP, IS_INN Voltage -0.3 to 26 V VIN Voltage -0.3 to 6 V VPP Voltage -0.3 to 8 V LDO33, LDO_IN, LDO_OUT, LED1, LED2 VDD_IO, GPIO0_SCL, GPIO1_SDA, GPIO2, GPIO3 GPIO4, GPIO5, GPIO6, GPIO7, PA_GL2 PA_GL1, VDD_DRV, ANA_TEST, EXT_TS, DMOD_VIN DMOD_IIN, IS_OUT Voltage -0.3 to 6 V LDO18 Voltage -0.3 to 2 V GND, GND_REF, GND_SNS, GND_DRV Voltage -0.3 to 0.3 V 5.2 5.3 Recommended Operating Condition Symbol Description Min. VIN DC power input for power transmission. TJ TA Typ. Max. Unit 4.5 5.5 V Junction temperature -30 125 ℃ Ambient temperature -30 85 ℃ Device Characteristics Symbol Description Conditions Min. Typ. Max. Unit 4.5 5 5.5 V 4.2 V Input Supply and Current Consumption VIN VUVLO VUVLO_HYS IIN ISTD_BY IPDN Input supply voltage range Under voltage lockout VIN: 0V to 5V 4.0 Under voltage lockout hysteresis VIN: 5V to 0V 500 mV Input current at power transfer mode VIN=5V 5 mA Input current at stand-by mode (periodic ping) VIN=5V 0.5 mA ENB=VIN=5V 13 uA Input current at power down mode Power Amplifier and Driver fPA Power amplifier switching frequency 85 205 kHz TLS_SW Low side gate driver rising and falling times 50 ns THS_SW High side gate driver rising and falling times 150 ns CELFRAS, Inc. -10- CWT500 Datasheet (Rev 1.0) CWT500 Qi Compliant 5W Wireless Power Transmitter IC POUT_PA_MAX Power amplifier maximum output power 5 W 3.3 V Internal LDOs VOUT_LDO33 IOUT_LDO33_MAX VOUT_LDO18 IOUT_LDO18_MAX Internal LDO33 output voltage range VIN>5V LDO33 maximum output current 20 Internal LDO18 output voltage range VIN>5V 1.8 LDO18 maximum output current mA V 10 mA BGR Internal BGR output voltage Register programmable VIN>3.3V 1.22 V fOSC50K Internal low speed oscillator frequency Register programmable VIN>3.3V 50 kHz fOSC60M Internal main oscillator frequency Register programmable VIN>3.3V 60 MHz ADC resolution VIN>3.3V 12 bit fOSC60M=60MHz 217 kSa/s VBGR Oscillator ADC NADC fSAMPLE ADC sampling rate NCH_ADC ADC channel 6 Protection IOCL IIN over current limit protection RSENSE=20mΩ TOTP Over temperature protection Thermal shutdown temperature 30℃ to 160℃ Temperature: Temperature: 2 A 150 ℃ 20 ℃ TOTP_HYS OTP hysteresis VTS_HOT EXT_TS hot temperature protection threshold voltage VEXT_TS: 0V to 0.5V 0.315 V VTS_HOT hysteresis VEXT_TS: 0.5V to 0V 20 mV EXT_TS cold temperature protection threshold voltage VEXT_TS: 0.5V to 1.5V 0.980 V VTS_COLD hysteresis VEXT_TS: 1.5V to 0.5V 80 mV VTS_HOT_HYS VTS_COLD VTS_COLD_HYS CELFRAS, Inc. 160℃ to 30℃ -11- CWT500 Datasheet (Rev 1.0) CWT500 Qi Compliant 5W Wireless Power Transmitter IC 6. I2C Signal Timing Figure 6. Timing Diagram for I2C interface Symbol Description Conditions VIL_SDA Input low threshold level SDA VPULLUP=VDD_IO=3.3V VIH_SDA Input high threshold level SDA VPULLUP=VDD_IO=3.3V VIL_SCL Input low threshold level SCL VPULLUP=VDD_IO=3.3V VIH_SCL Input high threshold level SCL VPULLUP=VDD_IO=3.3V Min. Typ. Max. Unit 0.7 V 2.6 V 0.7 2.6 V V fSCL SCL clock frequency 400 kHz tLOW SCL clock low time 1.3 us tHIGH SCL clock high time 0.6 us tr Rise time of both SDA and SCL 0.3 us tf Fall time of both SDA and SCL 0.3 us tSU,STA Setup time for START condition 0.6 us tHD,STA Hold time for START condition 0.6 us tSU,DAT Data setup time 0.1 us tHD,DAT Data hold time tSU,STO Setup time for STOP condition 0.6 us Bus free time between STOP and START condition 1.3 us tBF 0.9 us Table 2. I2C Characteristics CELFRAS, Inc. -12- CWT500 Datasheet (Rev 1.0) CWT500 Qi Compliant 5W Wireless Power Transmitter IC Revision History Date Version No. 2018/03/25 1.0 CELFRAS, Inc. Description Initial Release -13- CWT500 Datasheet (Rev 1.0) CWT500 Qi Compliant 5W Wireless Power Transmitter IC Contact US  Headquarters CELFRAS Semiconductor Inc. 江西联智集成电路有限公司 59 Chuangxin No.1 Road, Nanchang Hi-tech Development Zone, Nanchang, Jiangxi, P.R.CHINA, Zip:330000  International CELFRAS Design Center Inc. 7F, 225-14, Pangyoyeok-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 13494, Korea Tel. +82-70-4055-6466 Fax +82-31-707-8825  Contact Website http://www.celfras.com/ Technical Support cts@celfras.com, june_yoo@celfras.com Sales Contact marketing@celfras.com Copyright © 2018 CELFRAS., Inc. All rights reserved. CELFRAS., Inc. CELFRAS, Inc. -14- CWT500 Datasheet (Rev 1.0)