Battery Charger. bq25050 Datasheet

bq25050 Charger. Datasheet pdf. Equivalent

bq25050 Datasheet
Recommendation bq25050 Datasheet
Part bq25050
Description Single Cell Li-Ion Battery Charger
Feature bq25050; bq25050 www.ti.com SLUSA33 – MARCH 2010 1A, Single-Input, Single Cell Li-Ion Battery Charger with.
Manufacture etcTI
Datasheet
Download bq25050 Datasheet





Texas Instruments bq25050
bq25050
www.ti.com
SLUSA33 – MARCH 2010
1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, External Power Path
Control, and Single Input Interface
Check for Samples: bq25050
FEATURES
1
• 30V input Rating, With 10.5V Over-Voltage
Protection (OVP)
• FET Controller for External Battery FET for
External Power Path Control (BGATE)
• Input Voltage Dynamic Power Management
• 50mA integrated Low Dropout Linear
Regulator (LDO)
• Programmable Charge Current Through Single
Input Interface (CTRL)
• 0.5% Battery Voltage Regulation Accuracy
• 7% Charge Current Regulation Accuracy
• Thermal Regulation and Protection
• Battery NTC Monitoring During Charge and
Discharge
• Status Indication – Charging/Done and
Temperature Faults
• Available in small 2mm × 3mm 10 Pin SON
Package
APPLICATIONS
• Smart Phones
• Mobile Phones
• Portable Media Players
• Low Power Handheld Devices
TYPICAL APPLICATION CIRCUIT
DESCRIPTION
The bq25050 is a highly integrated Li-Ion linear
battery charger targeted at space-limited portable
applications. It operates from either a USB port or AC
Adapter and charges a single-cell Li-Ion battery with
up to 1A of charge current. The 30V input voltage
range with input over-voltage protections supports
low-cost unregulated adapters.
The bq25050 has a single power output that charges
the battery. The system load is connected to OUT.
The low-battery system startup circuitry maintains
OUT greater than 3.4V whenever an input source is
connected. This allows the system to start-up and run
whenever an input source is connected regardless of
the battery voltage. The charge current is
programmable up to 1A using the CTRL input.
Additionally, a 4.9V 50mA LDO is integrated into the
IC for supplying low power external circuitry.
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. The
charger power stage and charge current sense
functions are fully integrated. The charger function
has high accuracy current and voltage regulation
loops, charge status display, and charge termination.
USB or Adaptor
VBUS
D+
D-
GND
C1
0.1uF
R1
1 kΩ
1 IN
bq25050
CHG 8
OUT 10
7 CTRL
2 IMON
BGATE 9
BAT 6
TS 5
3 VSS
LDO 4
VGPIO
R2
100kΩ
C2
1uF
VGPIO
STATUS
VDD
QBAT
HOST
TEMP
PACK+
C4
0.1uF
C3
0.1uF
PACK -
VLDO
ISENSE
GPIO
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.
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 © 2010, Texas Instruments Incorporated



Texas Instruments bq25050
bq25050
SLUSA33 – MARCH 2010
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
PART NO.
bq25050DQCR
bq25050DQCT
ORDERING INFORMATION
MARKING
MEDIUM
DAM
Tape and Reel
DAM
Tape and Reel
QUANTITY
3000
250
PACKAGE DISSIPATION RATINGS TABLE
PACKAGE
RqJA
10 Pin 2mm × 3mm SON(1)
58.7°C/W (2)
RqJC
3.9°C/W
TA < 25°C POWER
RATING
1.70W
DERATING FACTOR
ABOVE TA = 25°C
0.017W/°C
(1) Maximum power dissipation is a function of TJ(max), RqJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = [TJ(max) - TA]/RqJA.
(2) This data is based on using the JEDEC High-K board and the exposed die pad is connected to a Cu pad on the board. The pad is
connected to the ground plane by a 2×3 via matrix.
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
VALUE / UNIT
Input Voltage
IN (with respect to VSS)
CTRL, TS, CHG, BGATE (with respect to VSS)
–0.3 to 30 V
–0.3 to 7 V
Output Voltage
BAT, OUT, LDO, CHG, BGATE, IMON (with respect to VSS)
–0.3 to 7 V
Input Current (Continuous)
IN
1.2 A
Output Current (Continuous)
BAT
1.2 A
Output Current (Continuous)
LDO
100 mA
Output Sink Current
CHG
5 mA
Junction temperature, TJ
Storage temperature, TSTG
–40°C to 150°C
–65°C to 150°C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage
values are with respect to the network ground terminal unless otherwise noted.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
IN voltage range
VIN IN operating voltage range
IIN Input current, IN
IOUT Ouput Current in charge mode, OUT
TJ Junction Temperature
MIN MAX UNITS
3.55 28
V
4.4 10.2
1A
1A
0 125 °C
ELECTRICAL CHARACTERISTICS
Over junction temperature range 0°C TJ 125°C and VIN = 5V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
INPUT
VUVLO
VHYS-UVLO
Under-voltage lock-out
Hysteresis on UVLO
VIN: 0V 4V
VIN: 4V 0V
3.25
TYP
3.30
250
MAX UNITS
3.55
V
mV
2 Submit Documentation Feedback
Product Folder Link(s): bq25050
Copyright © 2010, Texas Instruments Incorporated



Texas Instruments bq25050
bq25050
www.ti.com
SLUSA33 – MARCH 2010
ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range 0°C TJ 125°C and VIN = 5V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
VBATUVLO
VHYS-BUVLO
VIN-SLP
VHYS-INSLP
tDGL(NO-IN)
Battery UVLO
Hysteresis on BAT UVLO
Valid input source threshold VIN-SLP above
VBAT
Hysteresis on VIN-SLP
Deglitch time, input power loss to charger
turn-off
VBAT rising
VBAT falling
Input power good if VIN > VBAT + VIN–SLP
VBAT = 3.6V, VIN: 3.5V 4V
VBAT = 3.6V, VIN: 4V 3.5V
Time measured from VIN: 5V 2.5V 1µs
fall-time
1.95
30
VOVP
VHYS-OVP
tDGL(OVP)
tREC(OVP)
Input over-voltage protection threshold
Hysteresis on OVP
Input over-voltage deglitch time
Input over-voltage recovery time
VIN_DPM
Input DPM threshold
QUIESCENT CURRENT
VIN: 5 V 11 V
VIN: 11 V 5 V
Time measured from VIN: 11V 5V 1µs
fall-time to LDO = HI, VBAT = 3.5V
VIN Falling, VIN-DPM enabled with CTRL
10.2
4.2
IBAT(PDWN)
Battery current into BAT, No input
connected
VIN = 0V, VCHG = High, TS Enabled
VIN = 0V, VCHG = Low, TS Disabled, TJ =
85°C
IBAT(DONE)
IIN(STDBY)
BAT current, charging terminated
Standby current into IN pin
ICC Active supply current, IN pin
BATTERY CHARGER FAST-CHARGE
VIN = 6V, VBAT > VBAT(REG)
CTRL = HI, VIN < VOVP
CTRL = HI, VIN VOVP
VIN = 6V, no load on OUT pin, VBAT >
VBAT(REG), IC enabled
VBAT(REG)
IIN(LIM)
Battery charge regulation voltage
Input current limit (selected by CTRL
interface)
TA = 0°C to 125°C, IOUT = 50 mA
TA = 25°C
4 pulses on CTRL
5 pulses on CTRL
4.16
4.179
87
174
6 pulses on CTRL
261
7 pulses on CTRL
348
8 pulses on CTRL
435
9 pulses on CTRL
608
10 pulses on CTRL
739
11 pulses on CTRL
864
VDO(IN-OUT)
KIMON
VIN – VOUT
Input current monitor ratio
VIN = 4.2V, IOUT = 0.75 A
KIMON = IIMON / ICHG, RIMON = 1kΩ,
Current programmed using CTRL
VIMON(MAX)
Maximum IMON voltage
IMON Accuracy
PRE-CHARGE AND CHARGE DONE
IMON open
25 mA < IIN < 100 mA
IIN = 100 mA to 1 A
–25%
–8.5%
VLOWV
Pre-charge to fast-charge transition
threshold
External power path control disabled,
BGATE = VSS
2.4
External power path control enabled
2.8
tDGL1(LOWV)
Deglitch time on pre-charge to fast-charge
transition
tDGL2(LOWV)
Deglitch time on fast-charge to pre-charge
transition
IPRECHARGE
Precharge current to BAT during precharge
mode
ITERM
Default termination current threshold
RECHARGE OR REFRESH
VBAT = 0V to 2.9V, Battery FET connected
VBAT = 0V to 2.5V, BGATE = VSS, Input
current limit regulated to IPRECHARGE
VIN = 5V, ICHARGE = 100 mA to 1 A
28
41.5
7.5
VRCH
Recharge detection threshold
VBAT falling
VBAT(REG)
–0.13V
TYP
2.05
125
75
32
32
10.5
100
100
100
4.30
120
4.20
4.200
93
187
280
374
467
654
794
935
500
1
1.2
2.5
2.9
25
25
37
45
10.5
VBAT(REG)
–0.1V
MAX
2.15
150
UNITS
V
mV
mV
mV
ms
10.8
V
mV
µs
µs
4.4 V
150 µA
6 µA
10 µA
0.5 mA
2
3 mA
4.23
4.221
100
200
300
400
500
700
850
1000
900
V
mA
mV
mA/A
1.25
25%
5%
V
2.6 V
3.0
ms
ms
45
48.5
mA
13.5 %ICHG
VBAT(REG)
–0.065V
V
Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): bq25050
Submit Documentation Feedback
3





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