|
|
PDF ISL6257 Data sheet ( Hoja de datos )
| Número de pieza | ISL6257 | |
| Descripción | Highly Integrated Narrow VDC Battery Charger | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ISL6257 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
|
No Preview Available !
®
Data Sheet
January 17, 2007
ISL6257
FN9288.2
Highly Integrated Narrow VDC Battery
Charger for Notebook Computers
The ISL6257 is a highly integrated battery charger controller
for Li-Ion/Li-Ion polymer batteries. ISL6257 is designed for
Narrow VDC applications where the system power source is
either the battery pack or the regulated output of the charger.
This makes the max voltage to the system equal to the max
battery voltage instead of the max adapter voltage. Operating
at lower system voltage can improve overall efficiency. High
efficiency is achieved in the charger with a synchronous buck
topology. 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 also be programmed between 4.2V + 5% per cell and
4.2V - 5% per 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 ISL6257 automatically transitions from
regulating current mode to regulating voltage mode.
Ordering Information
PART
NUMBER
(Notes 1, 2)
PART
TEMP
PACKAGE PKG.
MARKING RANGE (°C) (Pb-free) DWG. #
ISL6257HRZ ISL6257HRZ -10 to +100 28 Ld 5x5 QFN L28.5×5
ISL6257HRZ-T ISL6257HRZ -10 to +100 28 Ld 5x5 QFN L28.5×5
Tape & Reel
NOTE: Intersil Pb-free plus anneal 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.
Features
• ±0.5% Charge Voltage Accuracy (-10°C to +100°C)
• ±3% Accurate Input Current Limit
• ±3% Accurate Battery Charge Current Limit
• ±25% Accurate Battery Trickle Charge Current Limit
• Programmable Charge Current Limit, Adapter Current
Limit and Charge Voltage
• Fixed 300kHz PWM Synchronous Buck Controller with
Diode Emulation at Light Load
• 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
• Control Adapter Power Source Select MOSFET
• Thermal Shutdown
• Aircraft Power Capable
• DC Adapter Present Indicator
• Battery Discharge MOSFET Control
• Less than 10µA Battery Leakage Current
• Support Pulse Charging
• Charge any Battery Chemistry: Li-Ion, NiCd, NiMH, etc.
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Notebook, Desknote and Sub-notebook Computers
• Personal Digital Assistant
Pinout
ISL6257 (28 LD QFN)
TOP VIEW
28 27 26 25 24 23 22
EN 1
21 CSOP
CELLS 2
20 CSIN
ICOMP 3
19 CSIP
VCOMP 4
18 SGATE
FB 5
VREF 6
17 BGATE
16 PHASE
CHLIM 7
15 UGATE
8 9 10 11 12 13 14
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006-2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL6257
Electrical Specifications
DCIN = CSIP = CSIN = 18V, CSOP = CSON = 12V, ACSET = DCSET = 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
DCPRN Sink Current
DCPRN = 0.4V
3 8 11 mA
DCPRN Leakage Current
DCPRN = 5V
-0.5 0.5 µA
CSON to GND resistance
CSON = 12.6V
315 380 485 kΩ
Thermal Shutdown Temperature
150 °C
Thermal Shutdown Temperature Hysteresis
25 °C
NOTE:
4. This is the sum of currents in these pins (CSIP, CSIN, BGATE, BOOT, UGATE, PHASE, CSOP, CSON) all tied to 16.8V. No current in pins EN,
ACSET, DCSET, VADJ, CELLS, ACLIM, CHLIM.
Typical Operating Performance DCIN = 20V, 4S2P Li-Battery, TA = +25°C, unless otherwise noted.
0.6 0.10
0.08
0.3
0.06
0.0
0.04
-0.3
0.02
-0.6
0
5 10 15
LOAD CURRENT (mA)
20
FIGURE 1. VDD LOAD REGULATION
40
0.00
0
100 200 300
LOAD CURRENT (μA)
FIGURE 2. VREF LOAD REGULATION
400
10
9
8
7
6
5
4
3
2
1
0
0
10 20 30 40 50 60 70 80 90 100
CSIP-CSIN (mV)
FIGURE 3. ACCURACY vs AC ADAPTER CURRENT
100
96
92
VCSON = 8.4V
2 CELLS
88
VCSON = 12.6V
3 CELLS
84 VCSON = 16.8V
4 CELLS
80
76
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
LOAD CURRENT (A)
FIGURE 4. SYSTEM EFFICIENCY vs CHARGE CURRENT
5 FN9288.2
January 17, 2007
5 Page 
ISL6257
ADAPTER
R8
100kΩ
1%
R9
11.5kΩ
1%
HOST
VCC
DIGITAL INPUT
DIGITAL INPUT
DIGITAL OUTPUT
R8
130kΩ
1%
R9
10.2kΩ
1%
VDD
Q5
0.1μF
CSON
Q3
DCIN
SGATE
ACSET
DCSET
CSIP
R5
100kΩ
VDDP
C7 R20
CSIN
1μF 4.7Ω
ISL6257
VDD
C9
1μF BOOT
R16
100kΩ
ACPRN
DCPRN
EN
UGATE
PHASE
LGATE
PGND
R1
3KΩ
C1
470pF
CSON
C6
33nF
R2
56kΩ
C2
1nF
ICOMP
VCOMP
FB
CSOP
CSON
BGATE
CF2
1μF
RF2 18Ω
VDDP
D2
C24
0.1μF
Q2
CF1
1μF
RS2
20mΩ
C21
Q1 22μF
D1
OPTIONAL
RF1
2.2Ω
RS1
10mΩ
L
4.7μH
SYSTEM LOAD
Co
330μF
Q6 C10
10μF
BAT+
BAT-
A/D OUTPUT
A/D OUTPUT
FLOATING
4.2V/CELL
ACLIM
VREF
CHLIM
VADJ
CELLS
GND
3S2P
BATTERY
PACK
BATTERY
ISOLATION FET
SCL
SDA
A/D INPUT
GND
SCL
SDA
TEMP
FIGURE 20. ISL6257 TYPICAL NVDC APPLICATION CIRCUIT WITH µP CONTROL
11 FN9288.2
January 17, 2007
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ISL6257.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ISL6251 | Low Cost Multi Chemistry Battery Charger Controller | Intersil Corporation |
| ISL6251A | Low Cost Multi Chemistry Battery Charger Controller | Intersil Corporation |
| ISL6252 | Highly Integrated Battery Charger Controller |  Intersil |
| ISL6252A | Highly Integrated Battery Charger Controller | Intersil |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |