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BQ24157S View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
BQ24157S 1.55-A Fully Integrated Switch-Mode One-Cell Li-Ion Charger With Full USB Compliance and USB-OTG Support TI
Texas Instruments TI
BQ24157S Datasheet PDF : 45 Pages
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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 VBUS: 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 RSNS = 68 mto program up to 1.25-A
charge current, use RSNS = 55 mto
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.
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