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Renesas P9242-RNDGI
- Part No.:
- P9242-RNDGI
- Manufacturer:
- Renesas
- Category:
- Power Management - Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
P9242-RNDGI.pdf
- Description:
- IC TRANSMITTER 48VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:3,508
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Product details
Overview
P9242-RNDGI from Renesas Electronics (formerly IDT) is a highly integrated wireless power transmitter IC supporting up to 15W output via magnetic induction, featuring an embedded 32-bit ARM® Cortex®-M0 processor, WPC-1.2 compliance with MP-A2 coil configuration, and dual half-bridge gate drivers for external FETs. It operates across 4.25V–21V input, delivers regulated 5V (PREG), 3.3V (LDO33), and 1.8V (LDO18) internal supplies, and enables real-time telemetry via I²C for voltage, current, frequency, and fault status - deployed in charging pads and cradles for tablets and accessories.
For engineers reviewing the P9242-RNDGI datasheet, P9242-RNDGI pinout, P9242-RNDGI application, or P9242-RNDGI equivalent, key selection considerations include its 48-VFQFN package thermal performance (θJA = 27.2°C/W), programmable foreign object detection (FOD) via ILIM/FOD pin, simultaneous voltage/current demodulation (VDEM1/IDEMI), and integrated step-down regulator with 4.5–5.5V output at 12V input.
Technical Context
The P9242-RNDGI implements a dual half-bridge topology with independent high-side (GH_BRG1/GH_BRG2) and low-side (GL_BRG1/GL_BRG2) gate drivers, each requiring external bootstrap capacitors (BST_BRG1/BST_BRG2) and 12Ω series gate resistors. Its communication stack supports WPC-1.2 digital ping, identification, negotiation, and power transfer phases using ASK modulation with dedicated VDEM1 (voltage demodulation) and IDEMI (current demodulation) inputs.
Thermal protection includes dedicated remote temperature sensing (TS pin for NTC thermistor), under-voltage lockout (UVLO at 4.0V with 0.5V hysteresis), and over-current limiting set via resistor divider on ILIM/FOD pin. The embedded Cortex-M0 executes firmware-defined FOD algorithms and LED blinking patterns while maintaining standby current as low as 1mA during periodic ping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Power | 15W wireless power transfer compliant with WPC-1.2 MP-A2 coil standard |
| Input Voltage Range | 4.25V–21V - supports wide-input industrial and automotive DC sources without external pre-regulation |
| Integrated Regulators | PREG (5V/1μF), LDO33 (3.3V/1μF), LDO18 (1.8V/1μF) - all internally biased, not for external loading |
| Communication Interface | I²C (SCL/SDA with 5.1kΩ pull-up to LDO33) - reads real-time input voltage, current, frequency, temperature, and status registers |
| FOD & Current Limit | Programmable via ILIM/FOD pin using resistor divider - sets both foreign object detection threshold and over-current trip point |
| Operating Temperature | −40°C to +85°C ambient - validated for consumer and industrial charging pad environments |
| Package | 48-VFQFN (6 mm × 6 mm, 0.5 mm pitch) with exposed thermal pad - θJA = 27.2°C/W on JEDEC 4-layer board |
Pinout & Package
The P9242-RNDGI is housed in a lead-free, RoHS-compliant 48-VFQFN package (6 mm × 6 mm, 0.5 mm pitch) with center-exposed thermal pad (EP) for enhanced heat dissipation. Pin assignments follow standard QFN layout with dual half-bridge driver banks, dedicated demodulation inputs, and programmable analog control pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-low enable | Drives device into shutdown mode (25 μA typical) when pulled HIGH; LOW enables full operation |
| VIN | Main power input | Accepts 4.25V–21V supply; requires 10 μF decoupling capacitor to GND |
| SW_S | Step-down regulator switch node | Connects to one terminal of 4.7 μH inductor for integrated buck conversion |
| ILIM/FOD | Analog programming input | Resistor-divider center tap sets both over-current limit and foreign object detection threshold |
| VDEM1 / IDEMI | Dual demodulation inputs | VDEM1 processes voltage-based ASK packets; IDEMI processes current-based ASK packets from receiver |
| GH_BRG1 / GL_BRG1 GH_BRG2 / GL_BRG2 | Half-bridge gate drivers | Drive external N-channel FETs; require 12Ω series gate resistors and bootstrap capacitors |
| TS | Remote temperature sense | Connects to NTC thermistor network for over-temperature shutdown; open-circuit default disables function |
| SCL / SDA | I²C interface | Standard two-wire bus operating at LDO33 voltage level; supports register read/write for telemetry and control |
Key Features
| Feature | Design Value |
|---|---|
| Embedded 32-bit ARM® Cortex®-M0 | Enables field-upgradable firmware for adaptive FOD, dynamic power control, and custom LED patterns without external MCU |
| Simultaneous V/I demodulation | Eliminates need for separate communication ICs by decoding both voltage (VDEM1) and current (IDEMI) ASK signals from receiver |
| Dedicated remote temperature sensing | TS pin interfaces directly with NTC thermistor for accurate coil/PCB temperature monitoring - critical for safe 15W operation |
| Integrated step-down regulator | Generates stable 5V (PREG) from wide-input VIN, reducing BOM count and enabling single-rail system power architecture |
| Programmable LED indicators | LED1/LED2 support pre-defined blinking patterns via LED/Q-Fact pin resistor selection - provides user feedback without GPIO expansion |
Applications
| Charging Pad | Tablet Cradle |
|---|---|
Use Scenario: Surface-mounted wireless charging platform for smartphones and wearables requiring compact, thermally robust design. IC Role / Device Role / Timing Role: Primary transmitter controller managing coil drive, FOD, telemetry, and WPC protocol stack. Use Value: Delivers 15W with <1mA standby current during periodic ping, minimizing no-load power loss in always-on consumer devices. | Use Scenario: Docking station for enterprise tablets where mechanical alignment and thermal management are critical. IC Role / Device Role / Timing Role: Dual half-bridge driver coordinating precise phase control and real-time current/voltage demodulation for stable power negotiation. Use Value: Integrated TS pin and NTC interface enable closed-loop thermal throttling - preventing overheating during sustained 12V/1.25A operation. |
| Accessory Charging Base | Multi-Device Charging Station |
Use Scenario: Compact desktop charger for earbuds, styluses, and smartwatches with visual status indication. IC Role / Device Role / Timing Role: Programmable LED1/LED2 outputs drive status LEDs with user-defined blink patterns synchronized to charging state. Use Value: LED/Q-Fact pin resistor selection configures both Q-factor measurement enablement and LED pattern - eliminating firmware updates for UI changes. | Use Scenario: Shared workspace charging hub supporting multiple WPC-compliant devices simultaneously. IC Role / Device Role / Timing Role: I²C interface reports real-time input current (ISNS_OUT), voltage (VIN), frequency, and fault status to host microcontroller. Use Value: Register-accessible telemetry (e.g., Read Register – Input Current, Table 15) enables dynamic load balancing and usage logging across ports. |
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-A21TX | Single half-bridge driver; no embedded MCU; relies on external host for FOD and protocol handling | Lacks integrated Cortex-M0 - requires external microcontroller for WPC-1.2 negotiation and LED control | Select when cost-sensitive designs can accommodate external firmware development and reduced integration |
| STWBC2-HP | Supports 20W max; includes hardware-accelerated FOD engine; uses SPI instead of I²C | Higher power ceiling and dedicated FOD hardware - suited for premium fast-charging applications | Select when >15W output or deterministic hardware FOD response time (<5ms) is required |
Compared with MP-A21TX and STWBC2-HP, the P9242-RNDGI uniquely balances integration (embedded M0, dual half-bridge, dual demodulation) and thermal efficiency (27.2°C/W θJA) in a 6×6 mm VFQFN, making it optimal for space-constrained 15W charging pads where firmware flexibility and low standby power are prioritized.
Availability
P9242-RNDGI is available at Aetrix Electronics and suitable for charging pads, tablet cradles, accessory bases, and multi-device charging stations requiring stable component supply, long-term lifecycle support, and WPC-1.2 compliance.
Supply support for P9242-RNDGI 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 - formed through the merger of Renesas Technology and NEC Electronics - is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT markets.
The P9242-RNDGI belongs to Renesas' wireless power transmission product line, engineered specifically for compact, high-efficiency 15W magnetic induction systems targeting consumer electronics charging infrastructure with minimal external components and firmware-defined adaptability.
FAQ
What is the maximum input voltage supported by the P9242-RNDGI?
The P9242-RNDGI supports an absolute maximum input voltage of 28V on VIN and related power pins, with functional operation specified across 4.25V to 21V. This wide range allows direct compatibility with 12V and 19V adapter inputs common in consumer charging applications, while built-in UVLO (4.0V threshold with 0.5V hysteresis) prevents erratic startup during brownout conditions. The P9242-RNDGI maintains regulation and telemetry accuracy throughout this range.
How does the P9242-RNDGI implement foreign object detection (FOD)?
The P9242-RNDGI implements FOD using a dual-method approach: Q-factor measurement (enabled via LED/Q-Fact pin configuration) and programmable current-limit threshold (set via resistor divider on ILIM/FOD pin). The embedded Cortex-M0 executes firmware-based algorithms that analyze coil resonance shifts and input current anomalies during power transfer. This hybrid method avoids reliance on single-parameter thresholds, improving reliability against false positives from metallic debris or misaligned receivers. The P9242-RNDGI reports FOD events via I²C status registers.
Can the P9242-RNDGI drive external MOSFETs without additional gate driver ICs?
Yes, the P9242-RNDGI integrates two complete half-bridge gate drivers - GH_BRG1/GL_BRG1 and GH_BRG2/GL_BRG2 - capable of directly driving external N-channel MOSFETs. Each high-side driver includes bootstrap circuitry (BST_BRG1/BST_BRG2 pins), and all drivers specify 50–300 ns rise/fall times into 3 nF load. External 12Ω series gate resistors are required per datasheet (Table 1), and bootstrap capacitors must be placed between BST and SW pins. No external gate driver ICs are needed for standard 15W implementations using the P9242-RNDGI.
What is the purpose of the VDEM1 and IDEMI pins on the P9242-RNDGI?
VDEM1 and IDEMI are dedicated demodulation inputs that decode ASK-modulated communication packets from the wireless power receiver. VDEM1 processes voltage variations across the transmitter coil, while IDEMI processes current variations - enabling simultaneous, independent decoding of receiver telemetry such as battery status, temperature, and fault codes. This dual-path scheme improves communication robustness in noisy EMI environments and eliminates the need for external envelope detectors. Both pins feed into the P9242-RNDGI's internal digital baseband processor for WPC-1.2 protocol compliance.
Does the P9242-RNDGI require external firmware programming before use?
No, the P9242-RNDGI ships with factory-programmed firmware supporting full WPC-1.2 operation out-of-box, including digital ping, identification, negotiation, and power transfer phases. However, Renesas provides optional firmware update capability via I²C for advanced customization of FOD parameters, LED patterns, and telemetry reporting intervals. Default behavior requires only hardware configuration (resistor dividers on ILIM/FOD and LED/Q-Fact pins) and basic I²C initialization - no mandatory firmware flashing is needed for functional 15W wireless power transmission using the P9242-RNDGI.
P9242-RNDGI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tray
- 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-RNDGI FAQ
1.How can I place an order for P9242-RNDGI through Aetrix?
Please submit a Request for Quotation (RFQ) for P9242-RNDGI 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-RNDGI reliable?
The price and inventory of P9242-RNDGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P9242-RNDGI is usually 5 days.
3.What payment methods are accepted for P9242-RNDGI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P9242-RNDGI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P9242-RNDGI?
P9242-RNDGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P9242-RNDGI 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-RNDGI?
For technical support, including P9242-RNDGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P9242-RNDGI requirements.
6.How does Aetrix verify that P9242-RNDGI is sourced from the original manufacturer or authorized distributors?
All P9242-RNDGI 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-RNDGI meets industry standards.
7.What is the process for return or replacement of P9242-RNDGI?
All P9242-RNDGI units undergo pre-shipment inspection (PSI). If there is an issue with P9242-RNDGI, 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-RNDGI part is unused and in its original packaging.
Return procedure for P9242-RNDGI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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