BQ24172RGYR
ActiveSTANDALONE 1-3 CELL 4A SYNCHRONOUS BUCK BATTERY CHARGER
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BQ24172RGYR
ActiveSTANDALONE 1-3 CELL 4A SYNCHRONOUS BUCK BATTERY CHARGER
Technical Specifications
Parameters and characteristics for this part
| Specification | BQ24172RGYR |
|---|---|
| Battery Chemistry | Lithium Ion/Polymer |
| Battery Pack Voltage | 2.1 V |
| Charge Current - Max [Max] | 4 A |
| Current - Charging | Constant - Programmable |
| Fault Protection | Over Voltage, Over Current, Over Temperature |
| Mounting Type | Surface Mount |
| Number of Cells [Max] | 3 cells |
| Number of Cells [Min] | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 24-VFQFN Exposed Pad |
| Programmable Features | Current |
| Supplier Device Package | 24-VQFN |
| Supplier Device Package [x] | 5.5 |
| Supplier Device Package [y] | 3.5 |
| Voltage - Supply (Max) [Max] | 17 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 4.20 | |
| 10 | $ 3.77 | |||
| 25 | $ 3.56 | |||
| 100 | $ 3.09 | |||
| 250 | $ 2.93 | |||
| 500 | $ 2.63 | |||
| 1000 | $ 2.22 | |||
| Digi-Reel® | 1 | $ 4.20 | ||
| 10 | $ 3.77 | |||
| 25 | $ 3.56 | |||
| 100 | $ 3.09 | |||
| 250 | $ 2.93 | |||
| 500 | $ 2.63 | |||
| 1000 | $ 2.22 | |||
| Tape & Reel (TR) | 3000 | $ 2.11 | ||
| Texas Instruments | LARGE T&R | 1 | $ 2.93 | |
| 100 | $ 2.57 | |||
| 250 | $ 1.80 | |||
| 1000 | $ 1.45 | |||
Description
General part information
BQ24172 Series
The bq2417x device is a highly integrated stand-alone Li-Ion and Li-Polymer switched-mode battery charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage. The bq2417x closely monitors the battery pack temperature to allow charge only in a preset temperature window. The bq24170 charges one, two, or three cells (selected by CELL pin), and the bq24172 is adjustable for up to three series Li+ cells.
The device charges the battery in three phases: precondictioning, constant current, and constant voltage.
Charge is terminated when the current reaches 10% of the fast charge rate. A programmable charge timer offers a safety backup. The bq2417x automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a low-quiescent current sleep mode when the input voltage falls below the battery voltage.
Documents
Technical documentation and resources
