BQ24075RGTR 查看數據表（PDF） - Teccor Electronics
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BQ24075RGTR Datasheet PDF : 53 Pages
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bq24072, bq24073, bq24074, bq24075, bq24079
SLUS810L – SEPTEMBER 2008 – REVISED JUNE 2018
bq2407x 1.5-A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC
1 Features
•1 Fully Compliant USB Charger
– Selectable 100-mA and 500-mA Maximum
Input Current
– 100-mA Maximum Current Limit Ensures
Compliance to USB-IF Standard
– Input-Based Dynamic Power Management
(VIN-DPM) for Protection Against Poor USB
Sources
• 28-V Input Rating with Overvoltage Protection
• Integrated Dynamic Power Path Management
(DPPM) Function Simultaneously and
Independently Powers the System and Charges
the Battery
• Supports up to 1.5-A Charge Current with Current
Monitoring Output (ISET)
• Programmable Input Current Limit up to 1.5 A for
Wall Adapters
• System Output Tracks Battery Voltage (bq24072)
• Programmable Termination Current (bq24074)
• Battery Disconnect Function with SYSOFF Input
(bq24075, bq24079)
• Programmable Pre-Charge and Fast-Charge
Safety Timers
• Reverse Current, Short-Circuit and Thermal
Protection
• NTC Thermistor Input
• Proprietary Start-up Sequence Limits Inrush
Current
• Status Indication – Charging/Done, Power Good
2 Applications
• Smart Phones
• Portable Media Players
• Portable Navigation Devices
• Low-Power Handheld Devices
3 Description
The bq2407x series of devices are integrated Li-Ion
linear chargers and system power path management
devices targeted at space-limited portable
applications. The devices operate from either a USB
port or an AC adapter and support charge currents up
to 1.5 A. The input voltage range with input
overvoltage protection supports unregulated
adapters. The USB input current limit accuracy and
start up sequence allow the bq2407x to meet USB-IF
inrush current specifications. Additionally, the input
dynamic power management (VIN-DPM) prevents the
charger from crashing incorrectly configured USB
sources.
The bq2407x features dynamic power path
management (DPPM) that powers the system while
simultaneously and independently charging the
battery. The DPPM circuit reduces the charge current
when the input current limit causes the system output
to fall to the DPPM threshold; thus, supplying the
system load at all times while monitoring the charge
current separately. This feature reduces the number
of charge and discharge cycles on the battery, allows
for proper charge termination and enables the system
to run with a defective or absent battery pack.
PART NUMBER
bq24072
bq24073
bq24074
bq24075
bq24079
Device Information(1)
PACKAGE
BODY SIZE (NOM)
VQFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Circuit
1 kW
1 kW
IN
1 mF
System
ON/OFF
Control
IN
13
8 VSS
bq24075
bq24079
15 SYSOFF
OUT 10
11
EN 2 5
BAT 2
3
TS 1
4.7 mF
SYSTEM
4.7 mF
TEMP
PACK+
1.18 kW 1.13 kW
PACK-
Copyright © 2017, Texas Instruments Incorporated
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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