CWT-1541(QFN)

CWT1541® Datasheet Qi Compliant 15W Wireless Power Transmitter IC General Description CWT1541 can deliver up to 15W 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, a precise clock generator for PA frequency control, and communication controllers which use Amplitude Shift Keying (ASK) and Frequency Shift Keying (FSK). CWT1541 can support multi-coil transmitter with CWP1500 companion PA chip and it also can support precise fixed frequency PA operation with external crystal. 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 over-temperature and voltage protection. Features Overview   WPC-1.2.4 compliant for MP-A8 medium power  Bi-directional channel communication specification  12-bit ADC for voltage/current measurement High-efficiency power transfer system  I2C programmable interface supporting baseline power profile (5V LDO50 maximum output current 20 Internal LDO33 output voltage range VIN>5V 3.3 LDO33 maximum output current V 20 Internal LDO18 output voltage range VIN>5V 1.8 LDO18 maximum output current mA mA V 10 mA BGR VBGR Internal BGR output voltage Register programmable VIN>3.3V 1.22 V Internal Oscillators 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 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 Semiconductor, Inc. 160℃ to 30℃ -12- CWT1541 Datasheet (Rev 1.0) CWT1541 Qi Compliant 15W Wireless Power Transmitter IC 6. I2C Signal Timing Figure 5. 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 Semiconductor, Inc. -13- CWT1541 Datasheet (Rev 1.0) CWT1541 Qi Compliant 15W Wireless Power Transmitter IC Revision History Date Version No. 2018/10/03 2018/11/22 2018/12/24 0.1 0.2 1.0 CELFRAS Semiconductor, Inc. Description Preliminary Release Initial Release Modified some-typo, officially released. -14- CWT1541 Datasheet (Rev 1.0) CWT1541 Qi Compliant 15W 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 Technical Support cts@celfras.com Sales Contact marketing@celfras.com Copyright © 2017 CELFRAS., Inc. All rights reserved. CELFRAS., Inc. CELFRAS Semiconductor, Inc. -15- CWT1541 Datasheet (Rev 1.0)