BQ24157S Datasheet, PDF (1/45 Pages) Texas Instruments – Full USB Compliance and USB-OTG Support

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bq24157S
SLUSB76B – FEBRUARY 2013 – REVISED MAY 2015
bq24157S 1.55-A Fully Integrated Switch-Mode One-Cell Li-Ion Charger
With Full USB Compliance and USB-OTG Support
Not Recommended for New Designs
1 Features
•1 Integrated Power FETs for up to 1.55-A Charge
Rate
• Spread Spectrum Frequency Control for Improved
EMI Performance
• High-Accuracy Voltage and Current Regulation
– Input Current Regulation Accuracy:
±5% (100 mA and 500 mA)
– Charge Voltage Regulation Accuracy:
±0.5% (25°C), ±1% (0°C to 125°C)
– Charge Current Regulation Accuracy: ±5%
• Factory Test-Mode for GSM Calibration Without a
Battery
• Input Voltage Based Dynamic Power
Management (VIN DPM)
• Bad Adaptor Detection and Rejection
• Safety Limit Register for Maximum Charge
Voltage and Current Limiting
• High-Efficiency Mini-USB/AC Battery Charger for
Single-Cell Li-Ion and Li-Polymer Battery Packs
• 20-V Absolute Maximum Input Voltage Rating
• 6.5-V Maximum Operating Input Voltage
• Programmable Charge Parameters through I²C
Compatible Interface (up to 3.4 Mbps):
– Input Current Limit
– VIN DPM Threshold
– Fast-Charge/Termination Current
– Charge Regulation Voltage (3.5 to 4.44 V)
– Low Charge Current Mode Enable/Disable
– Termination Enable/Disable
• Synchronous Fixed-Frequency PWM Controller
Operating at 3 MHz With 0% to 99.5% Duty Cycle
• Automatic High Impedance Mode for Low Power
Consumption
• Robust Protection
– Reverse Leakage Protection Prevents Battery
Drainage
– Thermal Regulation and Protection
– Input/Output Overvoltage Protection
• Status Output for Charging and Faults
• USB Friendly Boot-Up Sequence
• Automatic Charging
• Power Up System Without Battery
• Boost Mode Operation for USB OTG:
– Input Voltage Range (from Battery):
3.2 to 4.5 V
– Output for V_BUS: 5.05 V, 350 mA
• 2.1 × 2.0-mm, 20-Pin DSBGA Package
• Pin-to-Pin Compatible With bq24157 and bq24158
2 Applications
• Mobile and Smart Phones
• MP3 Players
• Handheld Devices
3 Description
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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24157S
DSBGA (20)
2.10 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
VBUS
CIN
1 mF
VBUS
SW
U1
bq24157S
VAUX
CIN _{4.7 mF} ^PMID
SCL
SDA
STAT
10 kW 10 kW
10 kW
I2C BUS
OTG
10 kW ^CD
HOST
10 kW
SCL
SDA
STAT
OTG
CD
BOOT
PGND
CSIN
CSOUT
VREF
LO 1 mH
CBOOT
33 nF
CCSIN
RSNS
0.1 mF
CVREF
1 mF
CCSOUT
0.1 mF
CO1
22 mF
VBAT
CO2
33 mF
PACK+
+
PACK–
A. Use R_SNS = 68 mΩ to program up to 1.25-A
charge current, use R_SNS = 55 mΩ to
program up to 1.55-A charge current. For
detailed instructions, refer to the Detailed
Design Procedure.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.