BQ24257RGET
NRND2A SINGLE INPUT I2C/STANDALONE SWITCH-MODE LI-ION BATTERY CHARGER
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BQ24257RGET
NRND2A SINGLE INPUT I2C/STANDALONE SWITCH-MODE LI-ION BATTERY CHARGER
Technical Specifications
Parameters and characteristics for this part
| Specification | BQ24257RGET |
|---|---|
| Battery Chemistry | Multi-Chemistry |
| Battery Pack Voltage | 4.44 V |
| Charge Current - Max [Max] | 2 A |
| Current - Charging | Constant - Programmable |
| Fault Protection | Over Voltage, Over Temperature |
| Interface | USB, I2C |
| Mounting Type | Surface Mount |
| Number of Cells | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 24-VFQFN Exposed Pad |
| Programmable Features | Timer |
| Supplier Device Package | 24-VQFN (4x4) |
| Voltage - Supply (Max) [Max] | 6.5 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 | $ 4.50 | |
| 10 | $ 4.04 | |||
| 25 | $ 3.82 | |||
| 100 | $ 3.31 | |||
| Digi-Reel® | 1 | $ 4.50 | ||
| 10 | $ 4.04 | |||
| 25 | $ 3.82 | |||
| 100 | $ 3.31 | |||
| Tape & Reel (TR) | 250 | $ 2.10 | ||
| Texas Instruments | SMALL T&R | 1 | $ 3.93 | |
| 100 | $ 3.44 | |||
| 250 | $ 2.41 | |||
| 1000 | $ 1.94 | |||
Description
General part information
BQ24257 Series
The bq2425x is a highly integrated single-cell Li-Ion battery charger with integrated current sense resistor targeted for space-limited, portable applications with high capacity batteries. The single cell charger has a single input that operates from either a USB port or AC wall adapter for a versatile solution. BC1.2 compatible D+, D- detection allows for recognition of CDP, DCP, SDP, and non-standard USB adapters. The use of an accessory dead battery provision (DBP) pin allows for the system to sync a dead battery state in order to enable or disable the BC1.2 detection in the event of an external USB-PHI.
The bq24257 has two modes of operation: 1) I2C mode, and 2) Standalone mode. In I2C mode, the host can adjust the charge parameters and monitor the status of the charger operation. In Standalone mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The bq24257 enters host mode while the I2C registers are accessed and the watchdog timer has not expired (if enabled).
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Technical documentation and resources
