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BQ24172RGYT
Texas Instruments
IC BATT CHG LI-ION 1-3CEL 24VQFN
1717 Pcs New Original In Stock
Charger IC Lithium Ion/Polymer 24-VQFN (5.5x3.5)
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (470 Ratings)
BQ24172RGYT
Product Overview
1259427
DiGi Electronics Part Number
BQ24172RGYT-DGManufacturer
Texas Instruments
BQ24172RGYT
Description
IC BATT CHG LI-ION 1-3CEL 24VQFNInventory
1717 Pcs New Original In Stock
Charger IC Lithium Ion/Polymer 24-VQFN (5.5x3.5)
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
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365 - Day Quality Guarantee - Every part fully backed.
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BQ24172RGYT Technical Specifications
Category
Power Management (PMIC), Battery Chargers
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Battery Chemistry
Lithium Ion/Polymer
Number of Cells
1 ~ 3
Current - Charging
Constant - Programmable
Programmable Features
Current
Fault Protection
Over Current, Over Temperature, Over Voltage
Charge Current - Max
4A
Battery Pack Voltage
2.1V
Voltage - Supply (Max)
17V
Interface
-
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
24-VFQFN Exposed Pad
Supplier Device Package
24-VQFN (5.5x3.5)
Base Product Number
BQ24172
Datasheet & Documents
HTML Datasheet
BQ24172RGYT-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-28050-2
TEXTISBQ24172RGYT
-BQ24172RGYT-NDR
296-28050-1
2156-BQ24172RGYT
-296-28050-1-DG
296-28050-6
Standard Package
250
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
좋은 품질과 친절한 고객 응대 덕분에 재구매 의사가 높아졌어요.
de desembre 02, 2025
Leur rapidité et la diversité de leur assortiment nous rendent la vie beaucoup plus facile.
de desembre 02, 2025
The value provided by DiGi Electronics is unmatched, especially considering their support quality.
de desembre 02, 2025
Their quick shipping and reliable after-sales support are unmatched.
de desembre 02, 2025
The team at DiGi Electronics is always helpful, ensuring our projects never experience delays due to stock shortages.
de desembre 02, 2025
The entire customer service team was professional, courteous, and helpful.
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Frequently Asked Questions (FAQ)
Can the BQ24172RGYT safely charge a 2S Li-ion battery pack when powered from a 12V automotive supply, and what design considerations are critical to avoid overvoltage stress on the input stage?
Yes, the BQ24172RGYT can charge a 2S Li-ion battery (up to 8.4V full charge) when supplied from a 12V automotive rail, as its maximum input voltage rating of 17V accommodates typical vehicle transients. However, you must include input protection against load-dump surges exceeding 40V—use a TVS diode rated for ISO 7637-2 compliance and ensure the upstream DC-DC converter or pre-regulator limits steady-state input to <16V. Also, verify that the exposed pad is properly soldered to a grounded thermal plane to maintain junction temperature below 125°C under full 4A charge current, especially in high-ambient automotive environments.
What are the risks of replacing the BQ24172RGYT with the BQ24610RGYT in an existing 3-cell Li-ion charger design, and how do their control loops differ under dynamic load conditions?
Directly substituting the BQ24172RGYT with the BQ24610RGYT introduces significant risk due to architectural differences: the BQ24610 uses a synchronous buck controller requiring external MOSFETs, while the BQ24172RGYT integrates switches. This means your PCB layout, gate drive circuitry, and compensation network would need redesign. Additionally, the BQ24610 lacks integrated current sensing—requiring an external sense resistor—and has different loop response characteristics that may cause instability during system load transients if output capacitance isn’t re-tuned. Only consider this swap if you’re upgrading to higher efficiency (>95%) and can accommodate the added BOM complexity and board space.
How should I configure the BQ24172RGYT’s programmable charge current for a compact wearable device with limited PCB area and passive cooling, to balance charge speed against long-term battery health?
For space-constrained wearables using the BQ24172RGYT, limit charge current to ≤1C of your battery’s rated capacity (e.g., 1A for a 1000mAh cell) via the ISET resistor to minimize heat buildup in the 24-VQFN package. Avoid pushing the 4A maximum unless you have a large copper pour under the exposed pad and airflow. Use TI’s Webench tool to simulate thermal performance, and consider implementing a thermal foldback scheme by monitoring the TS pin with an NTC thermistor—this dynamically reduces current if the battery or IC exceeds 45°C, significantly extending cycle life in sealed enclosures.
Is the BQ24172RGYT suitable for solar-powered charging applications with intermittent illumination, and how does its input power management handle unstable or fluctuating PV panel outputs?
The BQ24172RGYT is not ideal for direct solar charging without an intermediate MPPT or boost regulator, because it lacks input current regulation and assumes a stable DC source. Under fluctuating solar input, the IC may repeatedly enter/exit charging mode, causing voltage droop or premature termination. To mitigate this, place a large input capacitor (≥470µF low-ESR) near the VIN pin and consider adding a buck-boost pre-regulator (e.g., TPS63020) to maintain a steady 12V input. Alternatively, use a dedicated solar charger like the BQ25570 if your application requires true energy harvesting—don’t rely solely on the BQ24172RGYT’s basic fault protections for unstable sources.
What failure modes should I anticipate when using the BQ24172RGYT in a high-vibration industrial environment, and how can PCB layout and component selection reduce field returns?
In high-vibration settings, the BQ24172RGYT’s 24-VQFN package is susceptible to solder joint fatigue, especially at the exposed thermal pad. Mitigate this by using SAC305 solder with proper stencil aperture design (1:1 ratio, no tenting), and reinforce with via-in-pad filled and plated over. Select ceramic input/output capacitors (X7R, 1206 or larger) with flexible terminations to avoid cracking. Avoid placing heavy components nearby that could induce board flex. Additionally, ensure the battery connector uses a locking mechanism—vibration can cause intermittent connections, triggering the IC’s overvoltage or overcurrent faults unnecessarily. Perform HALT testing early to validate mechanical robustness.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
BQ24172RGYT CAD Models
Texas Instruments BQ24172RGYT PCB symbols & footprints
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