BL4054/BL4054B
800mA Standalone Linear Li-Ion Battery Charger
with Thermal Regulation in SOT23-5/TSOT23-5
FEATURES
Programmable Charge Current Up to 800mA
No MOSFET, Sense Resistor or Blocking
Diode Required
Preset 4.2V Charge Voltage with ±1%
Accuracy
Charge Current Monitor Output for Gas
Gauging
Thermal Regulation Maximizes Charge Rate
Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly
from USB Port
Over-Voltage Protect
Automatic Recharge
Charge Status Output Pin
C/10 Charge Termination
25µA Supply Current in Shutdown
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Available in 5-Lead SOT-23 Package
resistor is needed, and no blocking diode is
required due to the internal MOSFET
architecture.
Thermal
feedback regulates the charge current to
limit the die temperature during high power
operation or high ambient temperature. The
charge voltage is fixed at 4.2V, and the charge
current can be programmed externally with a
single resistor. The BL4054/BL4054B automatical
-ly terminates the charge cycle when the charge
current drops to 1/10 the programmed value after
the final float voltage is reached.
When the input supply (wall adapter or USB
supply) is removed, the BL4054/BL4054B
automatically enters a low current state, dropping
the battery drain current to less than 2µΑ. The
BL4054/BL4054B can be put into shutdown mode,
reducing the supply current to 25µA. Other
features include charge current monitor,
under-voltage lockout, automatic recharge and a
status pin to indicate charge termination and the
presence of an input voltage.
The only difference between BL4054 and
BL4054B is that at power on, BL4054 will check
the battery voltage first, it will not start charging
unless the battery voltage is below the
auto-rechrage threshold. BL4054B does not
perform this check. So BL4054B can guarantee
the high battery capacity at all time, while BL4054
can prevent the battery from being repeatedly
charged in some specific applications.
APPLICATIONS
Cellular and Smart Phones
Charging Docks and Cradles
BlueTooth Applications
PDAs
MP3/MP4/MP5 Players
DESCRIPTION
The BL4054/BL4054B is a complete constant
current / constant voltage linear charger for single
cell Lithium-Ion batteries. No external sense
ORDERING INFORMATION
BL4054/BL4054B – XX X X XXX
Package:
RN: SOT23-5
TRN: TSOT23-5
Features:
P: Standard (default, lead free)
C: Customized
Trickle Charge:
T: Trickle Charge
N: No Trickle Charge
Float Voltage:
42: 4.2V
43: 4.3V
44: 4.4V
TYPICAL APPLICATION
V
CC
4.5V to 6.5V
1uF
V
CC
BAT
600mA
BL4054/BL4054B
PROG
GND
4.2V
Li-Ion
Battery
1.65k
600mA Application Circuit
PPMIC BU
BL4054/BL4054B Rev 1.4
5/2009
www.belling.com.cn
Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited
©2009 Belling All Rights Reserved
1
BL4054/BL4054B
800mA Standalone Linear Li-Ion Battery Charger
with Thermal Regulation in SOT23-5/TSOT23-5
Absolute Maximum Rating
(Note 1)
Input Supply Voltage (V
CC
)
PROG Voltage
BAT Voltage
CHRGb
BAT Short-Circuit Duration
BAT Pin Current
-0.3V to +10V
-0.3V to +V
CC
-0.3V to 7V
-0.3V to 10V
Continuous
800mA
PROG Pin Current
800
µ
A
Maximum Junction Temperature
125°C
(Note2)
Operating Temperature Range
-40°C to 85°C
Storage Temperature Range
-65°C to 125°C
Lead Temperature (Soldering, 10s)
300°C
Package Information
TSOT23-5/SOT23-5
TOP VIEW
CHRGb 1
MARKING
5
PROG
GND 2
BAT
3
4
V
CC
Part Number
BL4054-4.2
BL4054-4.3
BL4054-4.4
BL4054B-4.2
BL4054B-4.3
BL4054B-4.4
Top Mark
BAYW
BBYW
BCYW
BAYW
BBYW
BCYW
(Note3)
Temp Range
-40°C to +85°C
Thermal Resistance
(Note 4)
Package
TSOT23-5
SOT23-5
Ө
JA
220°C/W
250°C/W
Ө
JC
110°C/W
130°C/W
Note 1:
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
Note 2:
The BL4054/BL4054B is guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the –40°C to
85°C operating temperature range are assured by design, characterization and correlation with statistical process controls.
Note 3:
X: Product Code(BL4054:B,BL4054B:B ) V: Voltage Code(4.2V:A,4.3V:B,4.4V:C) Y: Year of Manufacturing(9:2009) W: Week of
Manufacturing(W:A-Z, a-z). Contact Belling marketing for more information in detail.
Note 4:
Thermal Resistance is specified with approximately 1 square of 1 oz copper.
PPMIC BU
BL4054/BL4054B Rev 1.4
5/2009
www.belling.com.cn
Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited
©2009 Belling All Rights Reserved
2
BL4054/BL4054B
800mA Standalone Linear Li-Ion Battery Charger
with Thermal Regulation in SOT23-5/TSOT23-5
Pin Description
PIN
NAME
FUNCTION
Open-Drain Charge Status Output. When the battery is
charging, the CHRGb pin is pulled low by an internal
N-channel MOSFET. When the charge cycle is
completed, a weak pull-down of approximately 12
µ
A is
connected to the CHRGb pin, indicating an “AC present”
condition. When the BL4054/BL4054B detects an
under-voltage lockout condition, CHRGb is forced high
impedance.
Ground
Charge Current Output. Provides charge current to the
battery and regulates the final float voltage to 4.2V. An
internal precision resistor divider from this pin sets the
float voltage which is disconnected in shutdown mode.
Positive Input Supply Voltage. Provides power to the
charger. V
CC
can range from 4.25V to 6.5V and should be
bypassed with at least a 1
µ
F capacitor. When V
CC
drops
to within 30mV of the BAT pin voltage, the
BL4054/BL4054B enters shutdown mode, dropping I
BAT
to
less than 2
µ
A.
Charge Current Program, Charge Current Monitor and
Shutdown Pin. The charge current is Programmed by
connecting a 1% resistor, R
PROG
, from this pin to ground.
When charging in constant-current mode, this pin servos
to 1V. In all modes, the voltage on this pin can be used to
measure the charge current using the following formula:
I
BAT
= (V
PROG
/ R
PROG
) • 1000
The PROG pin can also be used to shut down the
charger. Disconnecting the Program resistor from ground
allows a 3
µ
A current to pull the PROG pin high. When it
reaches the 1.21V shutdown threshold voltage, the
charger enters shutdown mode, charging stops and the
input supply current drops to 25
µ
A. This pin is also
clamped to approximately 2.4V. Driving this pin to
voltages beyond the clamp voltage will draw currents as
high as 1.5mA. Reconnecting R
PROG
to ground will return
the charger to normal operation.
1
CHRGb
2
3
GND
BAT
4
V
CC
5
PROG
PPMIC BU
BL4054/BL4054B Rev 1.4
5/2009
www.belling.com.cn
Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited
©2009 Belling All Rights Reserved
3
BL4054/BL4054B
800mA Standalone Linear Li-Ion Battery Charger
with Thermal Regulation in SOT23-5/TSOT23-5
Block Diagram
V
CC
TA
1x
5µΑ
1000x
BAT
R1
3
4
120
o
C
T
DIE
-
+
7.0V
+
+
+
+
-
-
-
-
MA
OV_SHDN
-
-
SHDN
C1
+
R3
1V
R4
+
1
CHRGb
STANDBY
C2
0.1V
R5
-
+
C3
TO
BAT
2.9V
PROG
3µΑ
V
CC
-
5
R
PROG
PPMIC BU
BL4054/BL4054B Rev 1.4
5/2009
www.belling.com.cn
Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited
©2009 Belling All Rights Reserved
-
-
-
-
CA
VA
R2
+
+
+
+
+
+
+
+
REF
1.21V
GND
2
-
-
-
-
OVP
+
+
+
+
4
BL4054/BL4054B
800mA Standalone Linear Li-Ion Battery Charger
with Thermal Regulation in SOT23-5/TSOT23-5
Electrical Characteristics
(Note 5)
Symbol
I
SPLYCHRG
I
BATCHRG
V
PROGCHRG
I
SPLYSTBY
I
BATSTBY
I
SPLYMSD
I
BATMSD
V
PROGCLMP
I
SPLYASD
I
BATASD
I
SPLYUVLO
I
BATUVLO
I
BATSLEEP
V
FLOAT
I
TRIKL
V
TRIKL
V
TRIKL, HYS
V
UVLO
V
UVLO, HYS
V
OVP
V
OVP, HYS
(V
CC
= 5V, T
A
= 25°C, unless otherwise noted.)
Conditions
(Note6)
Parameter
Charge Mode Supply Current
Min
Typ
300
µ
A
Max
2000
µ
A
2000
µ
A
535mA
107mA
1.07V
1.07V
500
µ
A
-6
µ
A
90
µ
A
R
PROG
=2k
R
PROG
=10k
R
PROG
=2k
R
PROG
=10k
R
PROG
=2k
R
PROG
=10k
465mA
93mA
0.93V
0.93V
Charge Mode Battery Current
PROG Pin Voltage
Standby Mode Supply Current
Standby Mode Battery Current
Manual Shutdown Mode Supply Current
Manual Shutdown Mode Battery Current
PROG Pin Clamp Voltage
Automatic Shutdown Mode Supply
Current
Automatic Shutdown Mode Battery
Current
UVLO Mode Supply Current
UVLO Mode Battery Current
Sleep Mode Battery Current
Float Voltage
Trickle Charge Current
Trickle Charge Threshold
Trickle Charge Hysteresis
UVLO Threshold
UVLO Hysteresis
Input Over-Voltage Protect Threshold
Input Over-Voltage Protect Hysteresis
500mA
100mA
1V
1V
100
µ
A
0
-2.5
µ
A
-2
µ
A
2V
0
2
µ
A
3V
25
µ
A
-2
µ
A
0
25
µ
A
-2
µ
A
-1
µ
A
4.158V
R
PROG
=2k
R
PROG
=10k
20mA
5mA
2.8V
60mV
3.7V
150mV
6.8V
4.2V
50mA
10mA
2.9V
100mV
3.9V
200mV
7V
200mV
50
µ
A
2
µ
A
50
µ
A
2
µ
A
1
µ
A
4.242V
70mA
15mA
3V
150mV
4.1V
300mV
7.2V
PPMIC BU
BL4054/BL4054B Rev 1.4
5/2009
www.belling.com.cn
Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited
©2009 Belling All Rights Reserved
5
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