BQ24212 Datasheet, PDF (1/8 Pages) Texas Instruments – 800mA, Single-Input, Single Cell Li-Ion Battery Solar Charger

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bq24212
SLUSAL3 – AUGUST 2011
800mA, Single-Input, Single Cell Li-Ion Battery Solar Charger
Check for Samples: bq24212
FEATURES
1
• Input Voltage Dynamic Power Management
Feature (VBUS_DPM)
• Selectable Battery Tracking Mode to Maximize
the Charge Rate from Solar Panel Using DPM
Feature
• Load Mode to Support Loads Connected at
VBUS Pin
• 20V Input Rating, with Over-Voltage Protection
(OVP)
• 1% Battery Voltage Regulation Accuracy
• Up to 800mA Charge Current with 10% Charge
Current Accuracy
• Thermal Regulation Protection for Output
Current Control
• Low Battery Leakage Current
• BAT Short-Circuit Protection
• NTC Input Monitoring
• Built-In Safety Timer With Reset Control
• Status Indication – Charging/Power Present
• Available in Small 2mm × 3mm SON-10
Package
APPLICATIONS
• Smart Phones
• PDAs
• MP3 Players
• Low-Power Handheld Devices
• Auxiliary Solar Chargers
DESCRIPTION
The bq24212 is a highly integrated Li-ion linear
charger targeted at space-limited portable
applications. The high input voltage range with input
over-voltage protection supports low-cost unregulated
adapters. The input voltage regulation loop with
programmable input voltage regulation threshold
make it suitable for charging from alternative power
sources, such as solar panel or inductive charging
pad.
The IC has a single power output that charges the
battery. A system load can be placed in parallel with
the battery as long as the average system load does
not keep the battery from charging fully during the 10
hour safety timer.
The battery is charged in three phases: conditioning,
constant current and constant voltage. In all charge
phases, an internal control loop monitors the IC
junction temperature and reduces the charge current
if an internal temperature threshold is exceeded.
Charging
Source
1mF
bq24212
7V
1
VBUS
`
7 MODE
20V ^BAT
10
CHG 8
PG 6
VTSB 4
Host
VDPM
9
ISET
2
TS 5
VSS
3
System
1mF
RT1
TEMP
PACK +
PACK -
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2011, Texas Instruments Incorporated