Protection IC. bq24352 Datasheet

bq24352 Datasheet PDF, Equivalent


Part Number

bq24352

Description

Over-Voltage and Over-Current Charger Front-end Protection IC

Manufacture

etcTI

Total Page 19 Pages
PDF Download
Download bq24352 Datasheet


bq24352 Datasheet
bq24350
bq24352
www.ti.com............................................................................................................................................................... SLUS943A – MAY 2009 – REVISED JUNE 2009
Over-Voltage and Over-Current Charger Front-end
Protection IC With Integrated Charging FET
Check for Samples: bq24350 bq24352
FEATURES
1
2 Robust Protection
– Input Over-Voltage Protection
– Input Over-Current Protection
– Accurate Battery Over-Voltage Protection
– Thermal Shutdown
– Output Short-Circuit Protection
• Integrated Charging FET
• LDO Mode Operation
• Current Limited Power Supply for Host
Controller
• Soft-Start to Prevent Inrush Currents
• Soft-Stop to Prevent Voltage Spikes
• 30V Maximum Input Voltage
• Supports Up to 1A Load Current
• Small 2mm × 2mm 8pin SON Package
APPLICATIONS
• Mobile Phones
• Low-Power Handheld Devices
DESCRIPTION
The bq24350/2 is a highly integrated circuit designed to provide protection to Li-ion batteries from failures of the
charging circuit. The IC continuously monitors the input voltage and the battery voltage. In case of an input
over-voltage condition, the IC will turn off the internal power FET after a blanking time. If the battery voltage rises
to unsafe levels during charging process, power is removed from the system. If the input current exceeds the
over current threshold for a limited time, the IC will turn off the output power. The integrated charging FET can
regulate the charge voltage and current according to the control from the host. The device can also provide a
voltage source with over voltage and over current protection for host controller.
WHITE SPACE
WHITE SPACE
WHITE SPACE
AC
CACIN
1 mF
TYPICAL APPLICATION CIRCUIT
WHITE SPACE
ACIN
bq24350 /2
Q1
Q2
GND
CHG IN
GATDRV
OUT
VBAT
CCHGIN
1 mF
Analog
Base Band
Chip
CHGIN
GATDRV
0.2 W
R BAT
200 kW
ISENS
VBAT
PACK+
PACK-
PIN ASSIGNMENT
WHITE SPACE
ACIN 1
ACIN 2
GND 3
VBAT 4
8 OUT
7 OUT
6 CHGIN
5 GATDRV
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.
PowerPAD is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated

bq24352 Datasheet
bq24350
bq24352
SLUS943A – MAY 2009 – REVISED JUNE 2009............................................................................................................................................................... www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
SIMPLIFIED FUNCTION BLOCK DIAGRAM
ACIN
GND
VBAT
VACIN
VACIN
VUVLO
+
-
VACIN
VOVP
VACIN
V OUT
V BAT
BVOVP
VBAT
+
-
+
-
+
-
INPUT UVLO
t BLK ( CHGIN )
INPUT OVP
t DGL(OVP )
SLEEP
Battery OVP
t DGL (BOVP )
Q1
Protection &
Gate Control
Control
L ogic
Thermal
Shutdown
Q2
IIN
+
-
IO(OCP)
VCHGIN
+
- VOREG
CHGIN Discharge
Protection
Control
V OUT
500 W
OUT
CHGIN
GATDRV
NAME
ACIN
PIN
NUMBER
1,2
OUT
VBAT
7,8
4
GATDRV
CHGIN
5
6
GND
Thermal PAD
3
PIN FUNCTIONS
I/O DESCRIPTION
I Power Supply Input, connect to an external DC supply. Connect an external 1μF ceramic capacitor
(minimum) to GND.
O Output terminal to the charging system.
I Battery voltage sense input. Connected to pack positive terminal through a resistor. Connected to
ground if battery OVP function is not used.
I P-FET gate drive input , connected to gate drive pin of the host charger controller
O Output power pin for power input of host charger controller. Connect an external ceramic bypass
capacitor (1.0μF minimum) to GND.
– Ground terminal
There is an internal electrical connection between the exposed thermal pad and the GND pin of the
device. The thermal pad must be connected to the same potential as the GND pin on the printed circuit
board. Do not use the thermal pad as the primary ground input for the device. GND pin must be
connected to ground at all times.
PART NUMBER
bq24350DSGR
bq24350DSGT
bq24352DSGR
bq24352DSGT
MARKING
OAJ
OAJ
OCY
OCY
ORDERING INFORMATION
MEDIUM
QUANTITY
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
3000
250
3000
250
PACKAGE
2mm × 2mm SON
2mm × 2mm SON
2mm × 2mm SON
2mm × 2mm SON
INPUT OVP
THRESHOLD
6.17 V
6.17 V
7.1 V
7.1 V
2 Submit Documentation Feedback
Product Folder Link(s): bq24350 bq24352
Copyright © 2009, Texas Instruments Incorporated


Features Datasheet pdf bq24350 bq24352 www.ti.com.............. ....................................... ....................................... ....................................... ............................ SLUS943A MAY 2009 – REVISED JUNE 2009 Over- Voltage and Over-Current Charger Front- end Protection IC With Integrated Charg ing FET Check for Samples: bq24350 bq24 352 FEATURES 1 •2 Robust Protection – Input Over-Voltage Protection – I nput Over-Current Protection – Accura te Battery Over-Voltage Protection – Thermal Shutdown – Output Short-Circu it Protection • Integrated Charging F ET • LDO Mode Operation • Current L imited Power Supply for Host Controller • Soft-Start to Prevent Inrush Curr ents • Soft-Stop to Prevent Voltage S pikes • 30V Maximum Input Voltage • Supports Up to 1A Load Current • Sma ll 2mm × 2mm 8pin SON Package APPLICAT IONS • Mobile Phones • Low-Power Ha ndheld Devices DESCRIPTION The bq24350 /2 is a highly integrated circuit designed to provide protection to Li-ion batteries from failures o.
Keywords bq24352, datasheet, pdf, etcTI, Over-Voltage, and, Over-Current, Charger, Front-end, Protection, IC, q24352, 24352, 4352, bq2435, bq243, bq24, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)