BQ24250C_15 Datasheet, PDF (1/46 Pages) Texas Instruments – bq24250C 2A Single Input I2C, Standalone Switch-Mode Li-Ion Battery Charger with Power-Path Management

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bq24250C
SLUSBY7 – JULY 2014
bq24250C 2A Single Input I²C, Standalone Switch-Mode Li-Ion Battery Charger with
Power-Path Management
1 Features
•1 High-efficiency Switch-mode Charger with
Separate Power Path
• Start up System from Deeply Discharged or
Missing Battery
• USB Charging Compliant
– Selectable Input Current Limit of 100 mA,
500 mA, 900 mA, 1.5 A, and 2 A
• In Host Mode (After I²C Communication Starts
and Before Watchdog Timer Times Out)
– Programmable Battery Charge Voltage,
V_BATREG
– Programmable Charge Current (I_CHG)
– Programmable Input Current Limit (I_LIM)
– Programmable Input Voltage Based Dynamic
Power Management threshold, (V_{IN_DPM})
– Programmable Input Overvoltage Protection
Threshold (V_OVP)
– Programmable Safety Timer
• Resistor Programmable Defaults for:
– I_CHG up to 2 A with Current Monitoring Output
(ISET)
– I_LIM up to 2 A with Current Monitoring Output
(ILIM)
– V_{IN_DPM} (VDPM)
• Watchdog Timer Disable Bit
• Integrated 4.9 V, 50 mA LDO
• Complete System Level Protection
– Input UVLO, Input Over-voltage Protection
(OVP), Battery OVP, Sleep Mode, VIN_DPM
– Input Current Limit
– Charge Current Limit
– Thermal Regulation
– Thermal Shutdown
– Voltage Based NTC Monitoring Input
– Safety Timer
• 20 V Maximum Input Voltage Rating
• 10.5 V Maximum Operating Input Voltage
• Low R_DS(on) Integrated Power FETs for up to 2 A
Charging Rate
• Open Drain Status Outputs
• Synchronous Fixed-frequency PWM Controller
Operating at 3MHz for Small Inductor Support
• AnyBoot Robust Battery Detection Algorithm
• Charge Time Optimizer for improved charge times
at any given charge current
• 2.4 x 2.0 mm 30-ball WCSP Packages
2 Applications
• Smart Phones
• MP3 Players
• Portable Media Players
• Handheld Devices
3 Description
The bq24250C is a highly integrated single-cell Li-Ion
battery charger and system power-path management
device 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.
PART NUMBER
bq24250C
Device Information
PACKAGE
BODY SIZE
DSBGA (30)
2.427 mm × 2.027 mm
VIN
CIN
2.2 µF
Typical Application
CPMID
1 µF
PMID
IN
R1
VDPM
R2
3 MHz
PWM
LDO
1 µF
STAT
SW
BOOT
PGND
SYS
LO
1.0 µH
CBOOT
33 nF
22 μF
System Load
SCL
SDA
GPIO1
Host
GPIO2
GPIO3
GPIO4
VGPIO
SCL
SDA
INT
/CE
EN1
EN2
BAT
TS
1 μF
LDO
R3
TEMP
R4
RNTC
PACK+
+
PACK-
ILIM ISET
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.