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Renesas P9242-RNDGI8
- Part No.:
- P9242-RNDGI8
- Manufacturer:
- Renesas
- Category:
- Power Management - Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
P9242-RNDGI8.pdf
- Description:
- IC TRANSMITTER 48VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
P9242-RNDGI8 from Renesas Electronics (formerly IDT) is a WPC-1.2-compliant 15W magnetic induction wireless power transmitter IC with integrated 32-bit ARM® Cortex®-M0 processor, dual half-bridge gate drivers, and programmable foreign object detection. It operates from 4.25V to 21V input, delivers up to 15W output, and supports simultaneous voltage/current demodulation for bidirectional communication with receivers like the P9221-R. Used in charging pads and cradles for tablets and accessories.
For engineers reviewing the P9242-RNDGI8 datasheet, P9242-RNDGI8 pinout, P9242-RNDGI8 application, or P9242-RNDGI8 equivalent, key selection criteria include its 48-VFQFN package, I²C interface for real-time monitoring of input voltage/current/frequency, programmable ILIM/FOD pin, and integrated step-down regulator with 5V PREG output.
Technical Context
The P9242-RNDGI8 implements a full WPC-1.2 digital ping, identification, negotiation, and power transfer protocol stack within its embedded ARM® Cortex®-M0 core. It supports MP-A2 coil configuration and uses simultaneous VDEM1/IDEMI envelope detection for ASK-based receiver-to-transmitter communication.
Its dual half-bridge drivers (GH_BRG1/GL_BRG1 and GH_BRG2/GL_BRG2) control external N-channel MOSFETs in resonant LC topologies, while dedicated pins-TS for NTC thermistor sensing, OVP_CTL for scaled overvoltage detection, and LED/Q-Fact for Q-factor measurement enable precise thermal, safety, and FOD management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Power | 15W compliant with WPC-1.2 specification for high-efficiency pad-to-device transfer |
| Input Voltage Range | 4.25V to 21V - supports wide-input industrial and automotive DC supplies without external pre-regulation |
| Operating Temp | −40°C to +85°C ambient - validated for consumer and industrial charging environments |
| Processor Core | 32-bit ARM® Cortex®-M0 - enables firmware-upgradable protocol stack and custom FOD algorithms |
| Communication Interface | I²C (SCL/SDA) - allows host MCU to read real-time registers for input voltage, current, frequency, temperature, and fault status |
| Demodulation Scheme | Simultaneous VDEM1 (voltage) and IDEMI (current) - ensures robust packet decoding under variable coupling conditions |
| Package | 48-VFQFN (6 mm × 6 mm, 0.5 mm pitch) - space-efficient surface-mount solution with exposed thermal pad for thermal management |
Pinout & Package
The P9242-RNDGI8 is housed in a lead-free, RoHS-compliant 48-VFQFN package (6 mm × 6 mm) with an exposed center thermal pad (EP) for enhanced heat dissipation. Pin assignments follow JEDEC-standard layout with dual half-bridge driver banks, dedicated demodulation inputs, and configurable analog sense/control pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-low enable input | Drives device into 25 μA shutdown mode when pulled HIGH; enables full operation when LOW |
| VIN | Main power input | Accepts 4.25–21V DC; requires 10 μF local decoupling capacitor |
| PREG | 5V regulated output | Internal bias rail; must not be externally loaded; requires 1 μF capacitor to GND |
| SW_BRG1 / SW_BRG2 | Half-bridge switch nodes | Drive external resonant tank coils; connect to inductor terminals and bridge FET sources |
| GH_BRG1 / GL_BRG1 / GH_BRG2 / GL_BRG2 | Gate drivers | Drive external N-MOSFET gates via 12 Ω series resistors; support bootstrap operation via BST_BRG1/BST_BRG2 |
| VDEM1 / IDEMI | Demodulation inputs | High-pass filtered inputs for ASK packet decoding from receiver's voltage/current modulation |
| ILIM/FOD | Configurable analog input | Resistor-divider programmed threshold for over-current protection and foreign object detection |
| TS | Remote temperature sense | Connects to NTC thermistor network for active thermal shutdown at system level |
Key Features
| Feature | Design Value |
|---|---|
| Integrated step-down regulator | Generates stable 5V PREG rail from wide-input VIN, eliminating need for external buck converter |
| Dual independent half-bridge drivers | Supports full-bridge or dual-half-bridge resonant topologies with programmable dead-time and bootstrap management |
| Programmable FOD via ILIM/FOD pin | Enables user-defined foreign object detection thresholds using resistor dividers - no firmware update required |
| Pre-defined LED blinking patterns | Two open-drain LED outputs (LED1/LED2) with 8 factory-programmed blink sequences for status indication |
| Dedicated remote temperature sensing | TS pin accepts NTC thermistor voltage divider for accurate coil or PCB temperature monitoring and thermal foldback |
Applications
| Charging Pad | Tablet Cradle |
|---|---|
Use Scenario: Surface-mounted wireless charging platform for smartphones and wearables requiring compact, low-EMI design. IC Role / Device Role / Timing Role: Primary transmitter controller managing coil drive, communication, FOD, and thermal safety in WPC-1.2 power transfer phase. Use Value: Enables 15W delivery with <1% frequency drift during load transients due to integrated PLL and real-time current/voltage demodulation. | Use Scenario: Docking station for enterprise tablets where mechanical alignment and foreign metal detection are critical. IC Role / Device Role / Timing Role: System-on-chip transmitter executing full WPC-1.2 negotiation and calibration phases before entering sustained power transfer. Use Value: Reduces BOM count by integrating ARM® M0 processor, gate drivers, LDOs, and demodulators - eliminates 7 discrete ICs vs. discrete analog solutions. |
| Accessory Charging Base | Multi-Device Charging Station |
Use Scenario: Compact desktop charger supporting earbuds, smartwatches, and styluses with shared coil architecture. IC Role / Device Role / Timing Role: Transmitter managing dynamic load matching and multi-receiver handshaking via I²C-hosted register access. Use Value: Supports simultaneous voltage and current demodulation to maintain link integrity across varying Q-factors and coupling distances. | Use Scenario: Shared workspace charging hub with thermal-aware power allocation across up to three devices. IC Role / Device Role / Timing Role: Central controller coordinating interleaved power delivery, temperature monitoring per zone, and LED status feedback. Use Value: Uses TS pin and programmable ILIM/FOD to implement zone-specific FOD and thermal derating - prevents overheating in dense multi-coil layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless power transmitter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP-A21 (NXP Semiconductors) | WPC-1.2 compliant 15W transmitter with integrated drivers but no embedded ARM core; relies on external host MCU for protocol stack | Lacks on-chip firmware upgradability and autonomous FOD tuning; requires additional microcontroller and software integration | Select when cost-sensitive designs prioritize fixed-function simplicity over field-upgradable features |
| bq51222 (Texas Instruments) | 15W WPC-1.2 transmitter with integrated MCU but no dual half-bridge drivers; requires external gate drivers for full-bridge implementation | Needs external high-side drivers and bootstrap circuitry, increasing layout complexity and component count | Select when existing designs already use TI ecosystem and require minimal firmware migration effort |
Compared with MP-A21 and bq51222, the P9242-RNDGI8 provides full protocol autonomy, dual integrated half-bridge drivers, and resistor-programmable FOD - reducing total system footprint and enabling faster time-to-market for standalone charging platforms.
Availability
P9242-RNDGI8 is available at Aetrix Electronics and suitable for charging pads, tablet cradles, and multi-device charging stations requiring stable component supply, long-term lifecycle support, and WPC-1.2 certification readiness.
Supply support for P9242-RNDGI8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation (formerly Integrated Device Technology) is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT markets.
The P9242-RNDGI8 belongs to Renesas' wireless power transmitter product line, designed specifically for compact, high-efficiency, standards-compliant magnetic induction charging systems targeting consumer and enterprise accessories.
FAQ
What is the operating input voltage range for the P9242-RNDGI8?
The P9242-RNDGI8 operates from 4.25V to 21V DC input. This wide range allows direct connection to common DC power sources including USB PD adapters, 12V wall adapters, and automotive battery rails without intermediate regulation. The device incorporates under-voltage lockout (UVLO) with 4.0V turn-on threshold and 0.5V hysteresis to ensure reliable startup and brownout protection. Input current draw is 10mA during active power transfer at 12V input.
Does the P9242-RNDGI8 require an external microcontroller to function?
No, the P9242-RNDGI8 does not require an external microcontroller. It integrates a 32-bit ARM® Cortex®-M0 processor that executes the complete WPC-1.2 protocol stack-including digital ping, identification, configuration, negotiation, and power transfer phases-autonomously. Host interaction via I²C is optional for status monitoring or advanced configuration; basic operation proceeds independently after power-up and EN pin assertion.
How is foreign object detection (FOD) implemented in the P9242-RNDGI8?
FOD in the P9242-RNDGI8 is implemented through dual methods: Q-factor monitoring via the LED/Q-Fact pin and current-based detection via the ILIM/FOD pin. The ILIM/FOD pin accepts a resistor divider to set programmable thresholds for both over-current protection and FOD sensitivity. Q-factor detection uses internal drivers (Q_DRV1/Q_DRV2) to excite the coil and measure resonance decay. Both methods operate concurrently and can be enabled or disabled independently via firmware or hardware configuration.
What package type and thermal characteristics does the P9242-RNDGI8 have?
The P9242-RNDGI8 uses a 48-VFQFN package measuring 6 mm × 6 mm with 0.5 mm pitch and an exposed thermal pad (EP). Its thermal resistance junction-to-ambient (θJA) is 27.2°C/W on a standard 4-layer JEDEC board. Maximum junction temperature is 125°C, and ambient operating range is −40°C to +85°C. The exposed pad must be soldered to a thermal copper plane for effective heat dissipation during 15W operation.
Can the P9242-RNDGI8 drive full-bridge topologies directly?
Yes, the P9242-RNDGI8 directly supports full-bridge topologies using its two independent half-bridge driver banks: GH_BRG1/GL_BRG1/SW_BRG1/BST_BRG1 and GH_BRG2/GL_BRG2/SW_BRG2/BST_BRG2. Each bank drives one leg of the bridge with integrated bootstrap generation. External N-channel MOSFETs are required, connected via 12Ω gate resistors. The device provides synchronized timing control and dead-time management between high- and low-side drivers to prevent shoot-through.
P9242-RNDGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Wireless Power Transmitter
- Current - Supply:
- 10mA
- Voltage - Supply:
- 4.25V ~ 21V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-VFQFPN (6x6)
P9242-RNDGI8 FAQ
1.How can I place an order for P9242-RNDGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for P9242-RNDGI8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P9242-RNDGI8 reliable?
The price and inventory of P9242-RNDGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P9242-RNDGI8 is usually 5 days.
3.What payment methods are accepted for P9242-RNDGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P9242-RNDGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P9242-RNDGI8?
P9242-RNDGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P9242-RNDGI8 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P9242-RNDGI8?
For technical support, including P9242-RNDGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P9242-RNDGI8 requirements.
6.How does Aetrix verify that P9242-RNDGI8 is sourced from the original manufacturer or authorized distributors?
All P9242-RNDGI8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P9242-RNDGI8 meets industry standards.
7.What is the process for return or replacement of P9242-RNDGI8?
All P9242-RNDGI8 units undergo pre-shipment inspection (PSI). If there is an issue with P9242-RNDGI8, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P9242-RNDGI8 part is unused and in its original packaging.
Return procedure for P9242-RNDGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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