BQ27742YZFR-G1In StockTexas Instruments
BQ27742YZFR-G1 is a single-cell Li-Ion battery fuel gauge IC by Texas Instruments, featuring impedance track technology, 1% SOC accuracy, and I2C interface. Supports 2.45–4.5V operation with battery authentication. From $1.45, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- BGA
- Pin Count
- 15
- Lifecycle
- ACTIVE
- Datasheet
- BQ27742YZFR-G1 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.4490(MOQ 10)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Impedance Track technology for accurate state-of-charge (SOC) measurement within 1% error
- Supports single-cell Li-Ion/Li-Polymer batteries with 2.45–4.5V operating range
- Integrated SHA-1/HMAC battery authentication for counterfeit prevention
- I2C communication interface with programmable thresholds for charge/discharge control
- Ultra-low standby current consumption for extended battery life in portable devices
Applications
The BQ27742YZFR-G1 is designed for portable consumer electronics such as smartphones, tablets, and wearable devices requiring precise battery monitoring. It is widely used in IoT nodes, medical devices, and handheld instruments where accurate remaining capacity estimation and battery health reporting are critical. The IC also suits battery-protected modules in industrial and smart home applications that demand reliable low-power fuel gauging.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | ALSO OPERATES WITH SUPPLY 2.45 TO 2.8V; VG THR FOR ATTACHMENT DET IS 2.7V AND REMOVAL DET IS 1V |
| Adjustable Threshold | YES |
| Analog IC - Other Type | BATTERY GAUGE |
| JESD-30 Code | R-XBGA-B15 |
| JESD-609 Code | e1 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | UNSPECIFIED |
| Package Shape | RECTANGULAR |
| Package Style | GRID ARRAY, VERY THIN PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Current-Max (Isup) | 0.01mA |
| Supply Voltage-Max (Vsup) | 5V |
| Supply Voltage-Min (Vsup) | 2.8V |
| Supply Voltage-Nom (Vsup) | 3.6V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Tin/Silver/Copper (Sn/Ag/Cu) |
| Terminal Form | BALL |
| Terminal Pitch | 0.5mm |
| Terminal Position | BOTTOM |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## BQ27742YZFR-G1 Alternates Showing results | Image |
| Package | BGA |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Philippines |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for BQ27742YZFR-G1:
suggested
Frequently Asked Questions
What battery chemistry and cell configuration does the BQ27742YZFR-G1 support?
The BQ27742YZFR-G1 supports single-cell Li-Ion and Li-Polymer batteries with a nominal voltage range of 2.45 V to 4.5 V. It uses Texas Instruments' Impedance Track algorithm to dynamically model battery impedance and deliver accurate state-of-charge readings across varying temperatures and load conditions.
How accurate is the state-of-charge measurement of the BQ27742YZFR-G1?
Using the Impedance Track technology, the BQ27742YZFR-G1 achieves state-of-charge accuracy within 1% under typical operating conditions. It continuously tracks battery impedance changes due to aging and temperature, maintaining high accuracy over the full battery lifecycle without requiring periodic resets or recalibrations.
What communication interface does the BQ27742YZFR-G1 use, and what host systems can it connect to?
The BQ27742YZFR-G1 uses a standard I2C interface (up to 400 kHz fast mode) allowing easy integration with microcontrollers, application processors, and SoCs in smartphones, tablets, and embedded systems. The I2C bus also enables reading battery voltage, temperature, current, remaining capacity, and cycle count registers directly from the host processor.
Does the BQ27742YZFR-G1 include battery authentication features?
Yes, the BQ27742YZFR-G1 incorporates an integrated SHA-1/HMAC authentication engine that verifies battery pack authenticity. This prevents the use of counterfeit or incompatible battery packs, ensuring system safety and protecting the device from potential hazards caused by non-certified batteries.
What package does the BQ27742YZFR-G1 come in, and are there compatible alternatives?
The BQ27742YZFR-G1 is housed in a 15-ball BGA (DSBGA) package, making it suitable for space-constrained designs. Compatible alternatives within the TI battery gauge family include the BQ27741 and BQ27621, which offer similar Impedance Track functionality in comparable small-form-factor packages for single-cell applications.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $1.4980 | $14.98 |
| 25+ | $1.4730 | $36.83 |
| 50+ | $1.4490 | $72.45 |
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