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PDF ISL6251 Data sheet ( Hoja de datos )
| Número de pieza | ISL6251 | |
| Descripción | Low Cost Multi Chemistry Battery Charger Controller | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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 1. Datasheet - Battery Charger Controller  Hay una vista previa y un enlace de descarga de ISL6251 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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Data Sheet
ISL6251, ISL6251A
April 22, 2005
FN9202.0
Low Cost Multi-Chemistry Battery
Charger Controller
The ISL6251, ISL6251A is a highly integrated battery
charger controller for Li-Ion/Li-Ion polymer batteries and
NiMH batteries. High Efficiency is achieved by a
synchronous buck topology and the use of a MOSFET,
instead of a diode, for selecting power from the adapter or
battery. The low side MOSFET emulates a diode at light
loads to improve the light load efficiency and prevent system
bus boosting.
The constant output voltage can be selected for 2, 3 and 4
series Li-Ion cells with 0.5% accuracy over temperature. It
can be also programmed between 4.2V+5%/cell and
4.2V-5%/cell to optimize battery capacity. When supplying
the load and battery charger simultaneously, the input
current limit for the AC adapter is programmable to within
3% accuracy to avoid overloading the AC adapter, and to
allow the system to make efficient use of available adapter
power for charging. It also has a wide range of
programmable charging current. The ISL6251, ISL6251A
provides outputs that are used to monitor the current drawn
from the AC adapter, and monitor for the presence of an AC
adapter. The ISL6251, ISL6251A automatically transitions
from regulating current mode to regulating voltage mode.
Ordering Information
PART
NUMBER
TEMP
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL6251HRZ
(Notes 1, 2)
-10 to 100 28 Ld 5x5 QFN L28.5×5
(Pb-free)
ISL6251HAZ
(Notes 1, 2)
-10 to 100 24 Ld QSOP
(Pb-free)
M24.15
ISL6251AHRZ -10 to 100 28 Ld 5x5 QFN L28.5×5
(Notes 1, 2)
(Pb-free)
ISL6251AHAZ
(Notes 1, 2)
-10 to 100 24 Ld QSOP
(Pb-free)
M24.15
NOTES:
1. Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin
plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations.
Intersil Pb-free products are MSL classified at Pb-free peak
reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.
2. Add “-T” for Tape and Reel.
Features
• ±0.5% Charge Voltage Accuracy (-10°C to 100°C)
• ±3% Accurate Input Current Limit
• ±5% Accurate Battery Charge Current Limit
• ±25% Accurate Battery Trickle Charge Current Limit
(ISL6251A)
• Programmable Charge Current Limit, Adapter Current
Limit and Charge Voltage
• Fixed 300kHz PWM Synchronous Buck Controller with
Diode Emulation at Light Load
• Output for Current Drawn from AC Adapter
• AC Adapter Present Indicator
• Fast Input Current Limit Response
• Input Voltage Range 7V to 25V
• Support 2, 3 and 4 Cells Battery Pack
• Up to 17.64V Battery-Voltage Set Point
• Thermal Shutdown
• Support Pulse Charging
• Less than 10µA Battery Leakage Current
• Charge Any Battery Chemistry: Li-Ion, NiCd, NiMH, etc.
• Pb-Free Available (RoHS Compliant)
Applications
• Notebook, Desknote and Sub-notebook Computers
• Personal Digital Assistant
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
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ISL6251, ISL6251A
Electrical Specifications
DCIN=CSIP=CSIN=18V, CSOP=CSON=12V, ACSET=1.5V, ACLIM=VREF, VADJ=Floating, EN=VDD=5V,
BOOT-PHASE=5.0V, GND=PGND=0V, CVDD=1µF, IVDD=0mA, TA=-10°C to +100°C, TJ ≤ 125°C, unless
otherwise noted. (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
ADAPTER CURRENT LIMIT THRESHOLD
CSIP to CSIN Full-Scale Current Sense ACLIM=VREF
Voltage
ACLIM=Float
97 100 103 mV
72 75 78 mV
ACLIM=GND
47 50 53 mV
ACLIM Input Bias Current
ACLIM=VREF
10 16 20 µA
ACLIM=GND
-20 -16 -10 µA
VOLTAGE REGULATION ERROR AMPLIFIER
Error Amplifier Transconductance from CELLS=VDD
CSON to VCOMP
30 µA/V
CURRENT REGULATION ERROR AMPLIFIER
Charging Current Error Amplifier
Transconductance
50 µA/V
Adapter Current Error Amplifier
Transconductance
50 µA/V
BATTERY CELL SELECTOR
CELLS Input Voltage for 4 Cell Select
4.3 V
CELLS Input Voltage for 3 Cell Select
2V
CELLS Input Voltage for 2 Cell Select
2.1 4.2 V
LOGIC INTERFACE
EN Input Voltage Range
0
VDD
V
EN Threshold Voltage
Rising
1.030 1.06 1.100
V
Falling
0.985
1.000
1.025
V
Hysteresis
30 60 90 mV
EN Input Bias Current
EN=2.5V
1.8 2.0 2.2 µA
ACPRN Sink Current
ACPRN=0.4V
3 8 11 mA
ACPRN Leakage Current
ACPRN=5V
-0.5 0.5 µA
ICM Output Accuracy
(Vicm=19.9(Vcsip-Vsin))
CSIP-CSIN=100mV
CSIP-CSIN=75mV
-3 0
+3 %
-4 0 +4 %
CSIP-CSIN=50mV
-5 0 +5 %
Thermal Shutdown Temperature
150 °C
Thermal Shutdown Temperature
Hysteresis
25 °C
NOTE:
7. This is the sum of currents in these pins (CSIP, CSIN, BOOT, UGATE, PHASE, CSOP, CSON) all tied to 16.8V. No current in pins EN, ACSET,
VADJ, CELLS, ACLIM, CHLIM.
5 FN9202.0
April 22, 2005
5 Page 
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ISL6251, ISL6251A
VCC
DIGITAL
INPUT
D/A OUTPUT
OUTPUT
A/D INPUT
HOST
AVDD/VREF
SCL
SDL
A/D INPUT
GND
ADAPTER
R8
130k
1%
R9
10.2k,1%
C8
D3 0.1µF
D4
DCIN
ACSET
CSIP
VDDP
C7 R10 ISL6251CSIN
1µF 4.7Ω ISL6251A
R5
100k
C9
1µF
VDD
BOOT
ACPRN UGATE
CHLIM PHASE
R7: 100Ω
C11
3300pF 5.15A INPUT
CURRENT LIMIT
C6
6.8nF
EN
ICM
ACLIM
VREF
ICOMP
VCOMP
R6 C5
10k 10nF
R11,R12,R13
VADJ
10k FLOATING
4.2V/CELL
LGATE
PGND
CSOP
CSON
CELLS
GND
C2
0.1µF
R3: 18Ω
VDDP
D2
C4
0.1µF
R2
20mΩ
SYSTEM LOAD
C1
10µF
Q1
D1
Q2
Optional L
10µH
C3 R4
1µF 2.2Ω
R1
40mΩ
BAT+
3 CELLS
C10
10µF
Battery
Pack
SCL
SDL
TEMP
BAT-
FIGURE 13. ISL6251, ISL6251A TYPICAL APPLICATION CIRCUIT WITH MICRO-CONTROLLER
11 FN9202.0
April 22, 2005
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet ISL6251.PDF ] | |
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