P9027LP-R IDT | Alldatasheet
Document overview
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Technical content
Features
Small solution area: ~32mm2 Patented over-voltage protection clamp eliminating external capacitors Optimized for 0.5 to 3 W applications Integrated low dropout tracking LDO Low synchronous rectifier RDS(ON) for high efficiency Programmable rectifier voltage for optimal transient response versus efficiency Integrated charge pump for startup under weak coupling or poor alignment Programmable output voltage: 4.5 to 6.0 V Programmable current limit Open-drain interrupt flag Power transfer LED indicator Dedicated remote temperature sensing Active low enable pin for electrical on/off I2C interface 0 to +85°C ambient operating temperature range WLCSP 2.24 mm X 3.62 mm, 40 pin package P9027LP-R LX1 VRECT CRECT AGND SCL SDA SCL SDA Cd OUT COUT VOUT=5V Chip Enable CFLY CFLY1 PGND VHDR VSET End of Charge LRX Interupt EOC OUTSNS CFLY2 LX2 VDD CVDD TS1 TS2 RTS1 RTS2 INT EN RHDR IOC RIOC ACT
not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Table 1. Thermal Information 1,2 All voltages here are measured with respect to analog ground pin (AGND). Table 2. Thermal Symbol Information 1,2
- The maximum power dissipation is PD(MAX) = (TJ(MAX)-TA)/θJA where TJ(MAX) is 125°C. Exceeding the maximum allowable power
dissipation will result in excessive die temperature, and the device will enter thermal shutdown.
- The thermal rating was calculated based on a JEDEC 51 standard 4-layer board, 6 vias with dimensions 4 in × 4.5 in still air
altitude, and other unlisted variables. Table 3. ESD Information
Table 4. Electrical Specification Table
Table 4. Electrical Specification Table (Continued)
- Guaranteed by design and not subject to 100% production testing.
- Do not externally load. For internally biasing only.
Figure 8. TSI and TS1 EPTTS1 EPT
Figure 9. Pin Configuration
Table 5. Pin Description LX2 B1, B2 I Connect the Rx coil to this pin. LX1 B4, B5 I Connect the other side of Rx coil to this pin. from this pin to PGND. The rectifier voltage dynamically changes as the load changes. information see VSET application section. NC E1, E2, E4, F2 NC Do not connect. W coil. For 2 W and 3 W’s coils, use a 1.13 KΩ resistor. more information see current limit application section. information refer to the application section VSET for different output voltage settings. VHDR F5 I Programming pin to set the rectifier voltage. Connect a resistor from the pin to ground. Refer to the application section for appropriate resistor selection. capacitor as close as possible from this pin to GND. Do not load the pin. EN G2 I Active low enable pin. Pulling this pin to logic high forces the device into shutdown mode. When connected to logic low, the device is enabled. Do not leave the pin floating. AGND G3, H1 GND Analog ground. TS2 G4 Remote temperature sensor 2. If not used, connect to AGND.
Table 5. Pin Description (Continued) TS1 G5 Remote temperature sensor 1. If not used, connect to AGND. SDA H2 I/O I2C data pin. Open drain output. Connect a 5.1 K resistor from this pin to VDD. SCL H3 I I2C clock pin. Open drain output. Connect a 5.1 K resistor from this pin to VDD. when EN is high, EOC is high, die temperature reaches 130°C, TS1, or TS2 are triggered. low, it indicates connection between receiver and transmitter is established.
Figure 10. Functional Block Diagram
© 2016 Integrated Device Technology, Inc 13 April 28, 2016 Description of the Wireless Power System Inductive wireless power transfer involves transmission of energy by changing the magne tic field from a power source to an electrical load, without any connector, across an air gap. The DC power applied to the transmitter (Tx) creates an AC magnetic field in the transmitter coil. Once the receiver (Rx) coil is placed near the magnetic field, the field will induce an AC current through the receiving coil where it is converted into a DC current. The communication between receiver and the transmitter is accomplished by modulating the load seen by the receiver's inductor. To the transmitter, this appears as an impedance change, which results in measurable variations of the transmitter’s output waveform. Modulation is accomplished with AC Modulation, using internal switches from LX1 and LX2 to ground. The amount of power transferred is controlled b y the receiver. The receiver sends communication packets to the transmitter to increase power, decrease power, maintain the power level, or terminate the power transfer. The bit rate for Rx-to-Tx communication link is 2 Kbps. The communication is digital and communication of 1's and 0's is achieved by the Rx modulating the amount of load on the receiver coil. Theory of Operation The P9027LP-R wireless power receiver works according to the magnetic induction (MI) principle. The Tx and Rx coils are coupled wi th a coupling factor between 0.1 and 0.9, and power is transferred through an AC magnetic field. The P9027LP-R is a highly -integrated wireless power receiver with a maximum output power of 3 Watts. It is designed to convert an AC power signal from a resonant tank into a regulated output voltage. The device includes a high-efficiency synchronous full-bridge rectifier with ultra-low RDS(ON), NMOS LDO, and a charge pump for quick startup under very weak coupling or poor coil alignment. The output voltage is programmable w from 4.5 to 6.0 V. Programming is accomplished with a single external resistor on the VSET pin to ground. The receiver utilizes IDT’s proprietary voltage clamping scheme which limits the maximum voltage at the rectifier pin to 9 V, reducing the voltage rating on the output capacitors while eliminating the need for OVP and communication capacitors. As a result, it provides an extremely small application area , making it an industry-leading wireless power receiver for high power density applicat ions. Together with P9235A-R transmitter, the P9027LP-R is a complete wireless power system solution. The end of charge (EOC) pin is a logic input, which can be used with application processor or charger IC in battery management applications. When asserted , it sends an end of charge packet to the transmitter , terminating the power transfer and shutting down the device. The electrical on/off of the device is controlled through EN̅̅̅̅ pin. When connected to logic high, the device shuts down and consumes minimum current. Communication Between the P9027LP-R and P9235A-R When the P9027LP-R is placed on P9235A-R Tx coil , it responds to the transmitter's "ping" signal by rectifying the AC power from the transmitter and storing it on capacitor s connected to V RECT. During the "ping" phase, the rectifier provides voltage to the charge pump to supply VDD, and thus , power up the internal control circuitry and logic inside the receiver. To increase the reliability of communication, an internal load of approximately 20 mA is connected to VRECT until the external load is large enough to support communication. During power up, t he P9027LP-R communicates Signal Strength, Identification and Configuration packets to the transmitter , respectively. Once the handshake between Rx and Tx has been established, the wireless power system is in the Power Transfer phase. The control loop of the P9027LP-R then adjusts the rectifier voltage (based on load condition) by sending Control Error Packets instruction to the transmitter. During power delivery to the load, the P9027LP -R control circuit continues to send Control Error Packets to the transmitter to adjust the operating frequency, and thus rectifier voltage, to the level required to maximize the efficiency of the linear regulator. Over-Voltage Protection One of the common issues with wireless power receivers is the potential that the transmitter (TX) will transmit more power th an the receiver needs or can handle. This can happen when the coupling between the Tx and Rx increases due to a sud den move of the receiver. Because of the slow communication, it may take up to a few seconds before the Tx can adapt its transmitting power, and this may be long enough for the voltage on the LX and RECT pins to increase above the maximum ratings and damage the receiver. For this reason, the P9027LP -R has over -voltage protection. In most wireless receiver chips, this is implemented by external clamping capacitors. However, the P9027LP-R has implemented this feature internally to save board space and reduce the BOM cost. Furthermore, since the clamping is activated around 8.5 V, the bulk capacitors can have a low voltage rating.
connected from VDD to GND. Adding any external loads to this pin is prohibited as the charge pump output current is limited to 5 mA. output load once the communication is complete. Figure 11 shows how the rectifier voltage changes with load. value based on system efficiency and transient response when using P9235A-R and P9027LP-R. Table 6. Resistor Value and Output Current recommended to use at least either two 10 μF or four 4.7 μF capacitors to reduce the total capacitor ESR. many typical applications. Always consult the capacitor manufacturer’s data curves before selecting a capacitor. from pre-programmed voltages. See the table below for the desired output voltage with an appropriate resistor value. Table 7. Resistor Value and Output Voltage
the Electrical Characteristic Table for current sense accuracy. The internal current sensing accuracy degrades during light-load conditions. Table 8 below for different current protection thresholds. Table 8. Resistor Value, Over-current Setting transmitter has been established and the power is being transferred. temperature reaches 130°C, TS1 or TS2 and thermal shutdown have been triggered . During normal operation, the INT pin is pulled high. This pin can be connected to the interrupt input of a microcontroller. The source of what triggered the interrupt is available in I2 C register. mode. The P9235A-R will start digital ping after five minutes or if the P9027LP-R is removed. characteristic of an NTC thermistor is given below for reference.
T is the temperature in Kelvin. R0 is the known resistance at calibration temperature T0. B (beta) is the material constant. vendors have been tested and verified. Table 9. Coils Recommended with Receiver for 1, 2 and 3 W Applications. P9027LP-R-EVK reference kit. More information and layout files can be found at http://www.idt.com/WP3W-RK.
Figure 11. P9027LP-R Mass Market EV Schematics
Table 10. Component Selections
The default I2 C slave address is 0x68. The intent of this register is to identify the device is P9027LP-R. Table 11. Device Identification This register will provides information about firmware version programmed into the IC. Table 12. Firmware Version ID enabled by setting Masked Fault Enable Register. Bit of FLT_RAW will be set if corresponding fault condition is trigged. Table 13. Masked Fault Enable Register 0xD4 FLT_RAW_15 7 R 0 Reserved. 0xD4 FLT_RAW_14 6 R 0 Reserved. 0xD4 FLT_RAW_12 4 R 0 Reserved. 0xD4 FLT_RAW_10 2 R 0 Reserved. 0xD5 FLT_RAW_7 7 R 0 TS2 voltage is above programmed voltage. 0xD5 FLT_RAW_6 6 R 0 TS1 voltage is above programmed voltage. 0xD5 FLT_RAW_5 5 R 0 “1” when die temperature is greater than Tdie_shutdown.
0xD5 FLT_RAW_2 2 R 0 “1” when End Of Charge (EOC) pin is set. 0xD5 FLT_RAW_0 0 R 0 “1” when enable (EN̅̅̅̅) pin is set high. Table 14. Masked Fault Condition 0xD6 FLT_MSKD 7:5 R 0 Reserved. 0xD6 FLT_MSKD 4 R 0 Reserved. packet sent (0x03) if triggered. packet sent (0x03) if triggered. power transfer packet sent (0x02) if triggered. packet sent (0x01) if triggered. Table 15. Masked Interrupt Register 0xD8 INTR_MSKD 7:5 R 0 Reserved. 0xD8 INTR_MSKD 4 R 0 Reserved.
Tdie_shutdown, INT pin will be toggled. Setting 1s in the register enable co-responding fault to send End of Power Transfer. Table 16. Masked Fault Enable Register 0x00 FLT_MSKD_EN 7:5 R/W 0 Reserved. 0x00 FLT_MSKD_EN 3:0 R/W 1 Reserved. 0x01 FLT_MSKD_EN 7 R/W 1 TS2 fault is enabled to send End of Power Packet. 0x01 FLT_MSKD_EN 6 R/W 1 TS1 fault is enabled to send End of Power Packet. 0x01 FLT_MSKD_EN 4:3 R/W 1 Reserved. 0x01 FLT_MSKD_EN 2 R/W 1 End of Charge is enabled to send End of Power Packet. 0x01 FLT_MSKD_EN 1 R/W 1 Reserved. Setting 1s in the register enable co-responding fault to pull high INT̅̅̅̅̅ pin. Table 17. Masked Interrupt Enable 0x02 INTR_MSKD_EN 7:5 R/W 1 Reserved. 0x02 INTR_MSKD_EN 4 R/W 1 Thermal regulation interrupt is enabled to toggle INT̅̅̅̅̅ pin.
0x02 INTR_MSKD_EN 3:0 R/W 1 Reserved. 0x03 INTR_MSKD_EN 7 R/W 1 TS2 interrupt is enabled to toggle INT̅̅̅̅̅ pin. 0x03 INTR_MSKD_EN 6 R/W 1 TS1 interrupt is enabled to toggle INT̅̅̅̅̅ pin. 0x03 INTR_MSKD_EN 5 R/W 1 Die temperature Interrupt is enabled to toggle INT̅̅̅̅̅ pin. 0x03 INTR_MSKD_EN 4:3 R/W 1 Reserved. 0x03 INTR_MSKD_EN 2 R/W 1 End of Charge interrupt is enabled to toggle INT̅̅̅̅̅ pin. 0x03 INTR_MSKD_EN 1 R/W 1 Reserved. 0x03 INTR_MSKD_EN 0 R/W 1 Function to use EN pin to pull high INT̅̅̅̅̅ pin is enabled. When Tdie >= tdie_shdn_off + tdie_shdn_hys , 9027LP-R will shut down. When Tdie < tdie_shdn_off, die temperature shutdown function is OFF; however 9027LP-R may send EPT to shut down P9235A-R. If tdie_shdn_off > Tdie > tdie_shdn_off - 10°C , 9027LP-R will send EPT because of die temperature. If Tdie < tdie_shdn_off - 20°C, no EPT will be sent because of die temperature. Table 18. Die Temperature Shutdown Register 0x08 TDIE_SHDN_OFF 7 R/W 0 Die temperature shutdown select. 0x08 INTR_MSKD_EN 4:0 R/W 0 Reserved.
Table 19. Output Voltage Setting (VSET) external resistance on VSET pad. 0x33 Reserved 6:5 - - Reserved. TS1 to GND and/or TS2 to GND. Table 20. Thermistor TS1 and TS2 Register ADC Reading Table 21. Operating Frequency Register ADC Reading 0x7 E Reserved 7:4 X X Reserved.
Table 22. Communication Packet Register ADC Reading 0x82 Reserved 7:0 - - Reserved. 0x83 SIGSTR 7:0 R - Signal Strength Packet parameter value read. 0x84 Reserved 7:0 - - Reserved. 0x85 CTRLERR 7 R - Control Error Packet parameter value read. 0x86 Reserved 7:0 - - Reserved. 0x87 CHGSTS 7:0 R 1 Charge Status Packet parameter value read. 0x88 Reserved 7:4 - - Reserved.
© 2016 Integrated Device Technology, Inc 25 April 28, 2016
Package Information
Figure 12. WLCSP Landing Pattern (AWG40)
Figure 13. WLCSP Package Outline Drawing (AWG40)
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Ordering Information
Orderable Part Number Package MSL Rating Shipping Packaging Temperature P9027LP-RAWGI8 WLCSP-40 1 Tape and Reel 0°C to +85°C Marking Diagram 1. Company name 2. Truncated part number 3. “YWW” is the year and week that the part was assembled. 4. $ is mark code, -R is part of the device part number
Revision History
Revision Date Description of Change April 28, 2016 Original release of the P9027LP-R datasheet.