BQ24157SYFFT
ActiveI2C 1CELL 1.25A BUCK BATTERY CHARGER WITH OTG
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BQ24157SYFFT
ActiveI2C 1CELL 1.25A BUCK BATTERY CHARGER WITH OTG
Technical Specifications
Parameters and characteristics commom to parts in this series
| Specification | BQ24157SYFFT | BQ24157 Series |
|---|---|---|
| Battery Chemistry | Lithium Ion/Polymer | Lithium Ion/Polymer |
| Battery Pack Voltage | 4.44 V | 4.44 V |
| Charge Current - Max [Max] | 1.25 A | 1.25 - 1.55 A |
| Current - Charging | Constant - Programmable | Constant - Programmable |
| Fault Protection | Over Voltage, Over Temperature | Over Voltage, Over Temperature |
| Interface | I2C | I2C |
| Mounting Type | Surface Mount | Surface Mount |
| Number of Cells | 1 | 1 |
| Operating Temperature [Max] | 85 C | 85 C |
| Operating Temperature [Min] | -30 °C | -30 °C |
| Package / Case | 20-UFBGA, DSBGA | 20-UFBGA, DSBGA |
| Programmable Features | Current | Current |
| Supplier Device Package | 20-DSBGA | 20-DSBGA |
| Voltage - Supply (Max) [Max] | 6 V | 6 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 | $ 3.69 | |
| 10 | $ 3.31 | |||
| 25 | $ 3.13 | |||
| 100 | $ 2.71 | |||
| Digi-Reel® | 1 | $ 3.69 | ||
| 10 | $ 3.31 | |||
| 25 | $ 3.13 | |||
| 100 | $ 2.71 | |||
| Tape & Reel (TR) | 250 | $ 2.18 | ||
| 500 | $ 2.03 | |||
| 750 | $ 1.96 | |||
| 1250 | $ 1.88 | |||
| 1750 | $ 1.83 | |||
| 2500 | $ 1.79 | |||
| Texas Instruments | SMALL T&R | 1 | $ 2.78 | |
| 100 | $ 2.44 | |||
| 250 | $ 1.71 | |||
| 1000 | $ 1.38 | |||
BQ24157 Series
I2C 1cell 1.25A Buck battery charger with OTG
| Part | Voltage - Supply (Max) [Max] | Supplier Device Package | Mounting Type | Programmable Features | Number of Cells | Battery Pack Voltage | Operating Temperature [Min] | Operating Temperature [Max] | Battery Chemistry | Package / Case | Interface | Charge Current - Max [Max] | Fault Protection | Current - Charging |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24157SYFFR | 6 V | 20-DSBGA | Surface Mount | Current | 1 | 4.44 V | -30 °C | 85 C | Lithium Ion/Polymer | 20-UFBGA, DSBGA | I2C | 1.25 A | Over Temperature, Over Voltage | Constant - Programmable |
Texas Instruments BQ24157SYFFT | 6 V | 20-DSBGA | Surface Mount | Current | 1 | 4.44 V | -30 °C | 85 C | Lithium Ion/Polymer | 20-UFBGA, DSBGA | I2C | 1.25 A | Over Temperature, Over Voltage | Constant - Programmable |
Texas Instruments BQ24157YFFR | 6 V | 20-DSBGA | Surface Mount | Current | 1 | 4.44 V | -30 °C | 85 C | Lithium Ion/Polymer | 20-UFBGA, DSBGA | I2C | 1.55 A | Over Temperature, Over Voltage | Constant - Programmable |
Description
General part information
BQ24157 Series
The bq24157S is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small DSBGA package.
The IC charges the battery in three phases: conditioning, constant current, and constant voltage. The input current is automatically limited to the value set by the host.
Charge is terminated based on battery voltage and user-selectable minimum current level. During normal operation, the IC automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status can be reported to the host using the I2C interface. During the charging process, the IC monitors its junction temperature (TJ) and reduces the charge current after TJincreases to about 125°C. To support a USB OTG device, bq24157S can provide VBUS (5.05 V) by boosting the battery voltage. The IC is available in 20-pin DSBGA package.