STWLC04JR STMicroelectronics Integrated Circuit (BGA) In Stock
STWLC04JR is a wireless battery charger receiver IC from STMicroelectronics integrating a 2-channel power supply in a flip-chip BGA-77 package with 0.4 mm pitch. It features adjustable threshold control and supports wireless power transfer standards for compact wearable applications. Available with worldwide in-stock distribution.
- Manufacturer
- STMicroelectronics
- Package
- BGA
- Pin Count
- 77
- Lifecycle
- ACTIVE
- Datasheet
- STWLC04JR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.4940(MOQ 1)
- Temp Range
- -30.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STWLC04JR?
- Integrated 2-channel power supply support circuit with adjustable output threshold eliminates discrete regulators in wireless charging receiver designs
- Ultra-compact flip-chip BGA-77 package with 0.4 mm pitch occupies minimal PCB area, enabling sub-millimeter z-height in smartwatch and hearable receiver assemblies
- Supports wireless power transfer receiver operation with programmable thresholds, reducing external component count and simplifying compliance with proprietary charging protocols
What is STWLC04JR used for?
STWLC04JR targets the receiver side of wireless battery charging systems in smartwatches, fitness trackers, and true-wireless earbuds where board space below 10 mm² is critical. Its 2-channel architecture allows simultaneous charging of a main battery and powering a companion IC from a single wireless receiver coil. The device suits high-volume consumer wearable designs seeking tight integration between the wireless power conversion stage and downstream supply management.
What are the specifications of STWLC04JR?
| Manufacturer Package Code | Chip Scale Package 0.4mm pitch |
| YTEOL | 7 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | POWER SUPPLY SUPPORT CIRCUIT |
| JESD-30 Code | R-PBGA-B77 |
| Number of Channels | 2 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | BGA77,7X11,16 |
| Package Shape | RECTANGULAR |
| Package Style | GRID ARRAY, VERY THIN PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Supply Voltage-Max (Vsup) | 32V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | BALL |
| Terminal Pitch | 0.4mm |
| Terminal Position | BOTTOM |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | BGA |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the STWLC04JR datasheet?
STWLC04JR Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STWLC04JR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What package dimensions does STWLC04JR use, and how does this benefit wearable PCB layouts?
STWLC04JR uses a flip-chip BGA-77 package with a 0.4 mm ball pitch in a 7 mm × 11 mm body (BGA77,7X11 outline). The fine 0.4 mm pitch and low z-height of a flip-chip design allow placement directly under a charging coil on a two-layer flex PCB, which is essential in smartbands and earbuds where the overall device thickness must remain below 8 mm.
How does the adjustable threshold feature of STWLC04JR help optimize wireless charging efficiency?
The adjustable threshold allows the firmware or resistor divider to set the voltage level at which the receiver begins regulating power delivery to the battery. By tuning this threshold to match the battery's actual charge curve—typically 3.7 V to 4.35 V for Li-ion cells—the IC reduces overshoot and heat generation, improving end-to-end wireless charging efficiency by 3 % to 5 % compared to a fixed-threshold receiver.
Can STWLC04JR's 2-channel output simultaneously charge a battery and power a sensor MCU in a fitness tracker?
Yes. The 2-channel architecture provides independent regulated outputs; one channel can maintain a constant-current or constant-voltage profile for a 100 mAh Li-ion battery while the second supplies a stable 1.8 V or 3.3 V rail to a BLE MCU or accelerometer during charging. This eliminates a separate LDO and reduces total BOM cost in wearable designs that must keep the active system running during wireless charging.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.4940 | $1.49 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
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