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PDF BL4056 Data sheet ( Hoja de datos )
| Número de pieza | BL4056 | |
| Descripción | 1A Lithium Ion Battery Linear Charger | |
| Fabricantes | BELLING | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BL4056 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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BL4056
1A Lithium Ion Battery Linear Charger BL4056
General Description
BL4056 is a complete constant-current/constant voltage
linear charger for single cell lithium-ion batteries. With a
thermally enhanced 8-PIN SOP package on the bottom
and low external component count make the BL4056
ideally suited for portable applications. Furthermore the
BL4056 is specifically designed to work within USB power
specifications.
No external sense resistor is needed and no blocking
diode is required due to the internal PMOSFET
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/4.34V,and the charge current can be
programmed externally with a single resistor. The BL4056
automatically terminates the charge cycle when the charge
current drops to 1/10th the programmed value after the final
float voltage is reached.
When the input supply (wall adapter or USB supply) is
removed the BL4056 automatically enters a low current
state dropping the battery drain current to less than
2µA.The BL4056 can be put into shutdown mode reducing
the supply current to 55µA.
Other features include Battery temperature monitor,
under-voltage lockout, automatic recharge and two status
pins to indicate charge and charge termination.
Features
●Protection of battery cell reverse connection
● Programmable charge current up to 1A
●No MOSFET sense resistor or blocking diode
required
●Complete linear Charger in SOP8 Package for
single Cell Lithium-Ion Batteries.
●Constant-Current/Constant-Voltage operation
with thermal regulation to maximize Rate
TyWpiicthaolucthriasrkgoefcoyvcelreh（ea1t0in0g0.mAh battery）
● Preset 4.2V/4.34V charge voltage with ±1%
accuracy
● Automatic Recharge
● Two Status Indication for Charge status, no
battery and battery failure indicators
● C/10 charge termination
● 55µA supply current in shutdown
● 2.9V trickle current charge threshold
● Soft-Start limits inrush current
● Battery Temperature Sensing
Applications
●Cellular Telephones
●Digital Still Cameras
●MP3 Players
●Bluetooth Applications
●Portable Devices
●USB Bus-Powered Chargers
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Electrical Characteristics
Symbol
Parameter
Condition
VCC
ICC -IBAT
VFLOAL
IBAT
ITRIKL
Input supply voltage
●
static current
Regulated output voltage
BAT pin current
(The condition of current mode is
VBAT=3.9V)
Trickle charge current
●Charge mode, RPROG=1.1K
●Standby mode(charge end)
●Shutdown mode（RPROG not
connected, VCC<VBAT, or
VCC<VUV）
0℃≤TA≤85℃ BL4056-42
0℃≤TA≤85℃ BL4056-43
●RPROG=2.2K, current mode
●RPROG=1.1K,current mode
●Standby mode: VBAT=4.2V
●Standby mode: VBAT =4.34V
Shutdown mode, RPROG not
connected
Sleep mode, VCC=0V
●VBAT<VTRIKL, RPROG=1.1K
VTRIKL
VTRHYS
Trickle charge threshold voltage
Trickle voltage hysteresis voltage
RPROG=1.1K, VBAT rising
RPROG=1.1K
VUV
VUVHYS
VASD
ITERM
VPROG
VCHRG
VSTDBY
VCC under voltage lockout threshold
VCC under voltage lockout hysteresis
VCC-VBAT lockout threshold voltage
C/10 termination current threshold
PROG pin voltage
Pin output low voltage
Pin output low voltage
● VCC from low to high
●
VCC from low to high
VCC from high to low
●RPROG=2.2K
●RPROG=1.1K
●RPROG=1.1K，current mode
=5mA
=5mA
VTEMP-H
VTEMP-L
The voltage at TEMP increase
The voltage at TEMP decrease
∆VRECHRG
TLIM
RON
tSS
tRECHARGE
Recharge battery threshold voltage
Thermal protection temperature
The resistance of power FET ”ON”
（between VCC and BAT）
Soft-start time
Recharge comparator filter time
VFLOAT -VRECHRG
IBAT=0 to IBAT=1100V/RPROG
VBAT from high to low
tTERM
Termination comparator filter time
IBAT below ICHG/10
Min
4.0
-
-
-
4.158
4.3
450
950
0
-
-
120
2.8
150
3.5
150
100
50
60
120
0.9
-
-
-
42
120
-
-
-
0.8
0.8
BL4056
Typ.
5.0
150
55
Max
8.0
500
100
Unit
V
µA
µA
55 100 µA
4.2 4.242
4.34 4.38
500 550
1000 1050
-2.5 -6
V
V
mA
mA
µA
µA
±1 ±2 µA
-1 -2 µA
130 140 mA
2.9 3.0
V
200 250 mV
3.7 3.9
V
200 300 mV
140 180
80 110
mV
70 80
130 140
mA
1.0 1.1
V
0.3 0.6
V
0.3 0.6
V
80 83 %VCC
45 - %VCC
180 240 mV
145 -
℃
650 - mΩ
20 - µS
1.8 4 mS
1.8 4 mS
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5 Page 
BL4056
Fig.1 State diagram of a typical charge cycle
Fig.2 Isolating with capacitive load on PROG Pin
Stability Considerations
In constant-current mode, the PROG pin is in the feedback loop, not the battery. The constant-current mode
stability is affected by the impedance at the PROG pin. With no additional capacitance on the PROG pin, the charger
is stable with program resistor values as high as 20K. However, additional capacitance on this node reduces the
maximum allowed program resistor. Therefore, if IPROG pin is loaded with a capacitance C, the following equation
should be used to calculate the maximum resistance value for RPROG：
As user, may think charge current is important, not instantaneous current. For example, to run a low current mode
switch power which parallel connected with battery, the average current from BAT pin usually importance to
instantaneous current. In this case, In order to measure average charge current or isolate capacitive load from IPROG
pin, a simple RC filter can be used on PROG pin as shown in Figure 2. In order to ensure the stability add a 10K
resistor between PROG pin and filter capacitor.
Page11
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V1.4
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet BL4056.PDF ] | |
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