ISL6256AHAZ Intersil, ISL6256AHAZ Datasheet

IC BATTERY CHARGER CTRLR 28-QSOP

ISL6256AHAZ

Manufacturer Part Number
ISL6256AHAZ
Description
IC BATTERY CHARGER CTRLR 28-QSOP
Manufacturer
Intersil
Datasheet

Specifications of ISL6256AHAZ

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
Voltage - Supply
7 V ~ 25 V
Operating Temperature
-10°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
28-SSOP (0.150", 3.95mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Highly Integrated Battery Charger with
Automatic Power Source Selector for
Notebook Computers
The ISL6256, ISL6256A is a highly integrated battery charger
controller for Li-ion/Li-ion polymer 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
also be 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 ISL6256, ISL6256A provides outputs
that are used to monitor the current drawn from the AC
adapter, and monitor for the presence of an AC adapter. The
ISL6256, ISL6256A automatically transitions from regulating
current mode to regulating voltage mode.
ISL6256, ISL6256A has a feature for automatic power source
selection by switching to the battery when the AC adapter is
removed or switching to the AC adapter when the AC adapter is
available. It also provides a DC adapter monitor to support
aircraft power applications with the option of no battery charging.
Ordering Information
NOTES:
ISL6256HRZ
ISL6256HAZ
ISL6256AHRZ ISL6256 AHRZ -10 to +100 28 Ld 5x5 QFN L28.5x5
ISL6256AHAZ ISL6256 AHAZ -10 to +100 28 Ld QSOP
1. Add “-T” suffix for tape and reel. Please refer to TB347 for details on
2. These Intersil Pb-free plastic packaged products employ special Pb-
3. For Moisture Sensitivity Level (MSL), please see device information
(Notes 1, 2)
NUMBER
reel specifications.
free material sets, molding compounds/die attach materials, and
100% matte tin plate plus anneal (e3 termination finish, which is
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.
page for
see techbrief TB363.
PART
ISL6256,
ISL 6256HRZ
ISL 6256HAZ
MARKING
PART
ISL6256A. For more information on MSL please
®
1
-10 to +100 28 Ld 5x5 QFN L28.5x5
-10 to +100 28 Ld QSOP
RANGE
TEMP
(°C)
Data Sheet
1-888-INTERSIL or 1-888-468-3774
PACKAGE
(Pb-free)
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
M28.15
M28.15
DWG. #
PKG.
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
• Fixed 300kHz PWM Synchronous Buck Controller with
• Overvoltage Protection
• 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
• 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
• Supports Pulse Charging
• Pb-free (RoHS Compliant)
Applications
• Notebook, Desknote and Sub-notebook Computers
• Personal Digital Assistant
All other trademarks mentioned are the property of their respective owners.
September 14, 2010
Limit and Charge Voltage
Diode Emulation at Light Load
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007, 2008, 2010. All Rights Reserved
ISL6256, ISL6256A
FN6499.3

Related parts for ISL6256AHAZ

ISL6256AHAZ Summary of contents

Page 1

... ISL6256HAZ ISL 6256HAZ -10 to +100 28 Ld QSOP ISL6256AHRZ ISL6256 AHRZ -10 to +100 28 Ld 5x5 QFN L28.5x5 ISL6256AHAZ ISL6256 AHAZ -10 to +100 28 Ld QSOP NOTES: 1. Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb- ...

Page 2

Pinouts ISL6256, ISL6256A (28 LD QFN) TOP VIEW CELLS 2 3 ICOMP VCOMP 4 5 ICM VREF 6 CHLIM ISL6256, ISL6256A CSOP 20 ...

Page 3

ACSET ACPRN + - 1.26V VREF 152kΩ ADAPTER CURRENT ACLIM LIMIT SET 152kΩ ICOMP MIN VOLTAGE BUFFER VCOMP VREF 514kΩ gm1 VADJ - 514kΩ 2.1V VOLTAGE CELLS SELECTOR VDD REFERENCE VREF GND FB FIGURE 1. FUNCTIONAL BLOCK DIAGRAM 3 ISL6256, ...

Page 4

AC ADAPTER Q5 Q5 VDD R8 130k DCIN DCIN DCIN DCIN 0.1µF 10. ACSET ACSET ACSET ACSET C7 1µF VDDP VDDP VDDP VDDP R10 R10 R10 R10 3.3V 3.3V 4.7 4.7Ω ...

Page 5

ADAPTER VDD VDD VDD VDD 130k 130k 130k 130k R14 R14 100k 100k 100k 100k 10.2k 10.2k 10.2k 10. R15 ...

Page 6

... Junction Temperature Range .-10°C to +150°C Operating Temperature Range . . . . . . . . . . . . . . . .-10°C to +100°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp ≤ +125°C, Unless Otherwise Noted. Boldface limits apply over the J TEST CONDITIONS EN = VDD or GND, 7V ≤ DCIN ≤ 25V DCIN = 0, no load 7V ≤ ...

Page 7

Electrical Specifications DCIN = CSIP = CSIN = 18V, CSOP = CSON = 12V, ACSET = DCSET = 1.5V, ACLIM = VREF, VADJ = Floating VDD = 5V, BOOT-PHASE = 5.0V, GND = PGND = 0V ...

Page 8

Electrical Specifications DCIN = CSIP = CSIN = 18V, CSOP = CSON = 12V, ACSET = DCSET = 1.5V, ACLIM = VREF, VADJ = Floating VDD = 5V, BOOT-PHASE = 5.0V, GND = PGND = 0V ...

Page 9

Electrical Specifications DCIN = CSIP = CSIN = 18V, CSOP = CSON = 12V, ACSET = DCSET = 1.5V, ACLIM = VREF, VADJ = Floating VDD = 5V, BOOT-PHASE = 5.0V, GND = PGND = 0V ...

Page 10

Typical Operating Performance 0.6 0.3 0.0 -0.3 -0 LOAD CURRENT (mA) FIGURE 4. VDD LOAD REGULATION CSIP-CSIN (mV) FIGURE ...

Page 11

Typical Operating Performance FIGURE 10. CHARGE ENABLE AND SHUTDOWN CHLIM = 0.2V CHLIM=0.2V CHLIM=0.2V CSON = 8V CSON=8V CSON=8V FIGURE 12. SWITCHING WAVEFORMS AT DIODE EMULATION ADAPTER REMOVAL ADAPTER REMOVAL ADAPTER REMOVAL FIGURE 14. AC ADAPTER REMOVAL 11 ISL6256, ISL6256A ...

Page 12

Typical Operating Performance Functional Pin Descriptions BOOT Connect BOOT to a 0.1µF ceramic capacitor to PHASE pin and connect to the cathode of the bootstrap Schottky diode. UGATE UGATE is the high side MOSFET gate drive output. SGATE SGATE is ...

Page 13

PGND PGND is the power ground. Connect PGND to the source of the low side MOSFET. VDD VDD is an internal LDO output to supply IC analog circuit. Connect a 1µF ceramic capacitor to ground. VDDP VDDP is the supply ...

Page 14

It can achieve duty cycle 99.6%. To prevent boosting of the system bus voltage, the battery charger operates in standard-buck ...

Page 15

Charge Current Limit Accuracy The “Electrical Specifications” table on page 7 gives minimum and maximum values for the CSOP-CSON voltage resulting from IC variations at 3 different CHLIM voltages (see “CSOP to CSON Full-Scale Current Sense Voltage” on page 7). ...

Page 16

R 8 ⋅ ⎜ ⎟ V ------ - rise ACSET ⎝ R ⎠ 9 ⎛ ⎞ ⋅ ⋅ ⎜ ⎟ ------ - – ...

Page 17

Overvoltage Protection ISL6256 has an Overvoltage Protection circuit that limits the output voltage when the battery is removed or disconnected by a pulse charging circuit. If CSON exceeds the output voltage set point by more than V OVP pulls VCOMP ...

Page 18

Equation 21: ⋅ ⋅ SENSE f ------------------------------------------ - = ⋅ CO 2π L Output Capacitor Selection The output capacitor in parallel with the battery is ...

Page 19

source Low switching loss requires low drain-to-gate charge Q Generally, the lower the drain-to-gate charge, the higher the ON-resistance. Therefore, there is a trade-off between the ON-resistance and drain-to-gate charge. Good MOSFET selection is based on ...

Page 20

TABLE 2. COMPONENT LIST (Continued) PARTS PART NUMBERS AND MANUFACTURER R 40mΩ, ±1%, LRC-LR2512-01-R040-F, IRC 1 R 20mΩ, ±1%, LRC-LR2010-01-R020-F, IRC 2 R 18Ω, ±5%, (0805 2.2Ω, ±5%, (0805 100kΩ, ±5%, (0805 4.7k, ±5%, ...

Page 21

PHASE 11 R FET_r DS(ON) + CSOP Σ 0. CA2 CSON ICOMP - gm2 + C CHLIM + ICOMP - FIGURE 19. CHARGE CURRENT LIMIT LOOP The compensation capacitor (C ICOMP amplifier (GMI) a pole at ...

Page 22

A filter should be added between R S1 reduce switching noise. The filter roll off frequency should be between the crossover frequency and the switching frequency (~100kHz). Voltage Control Loop When the battery is charged to the voltage set by ...

Page 23

COMPENSATOR MODULATOR 40 LOOP 20 0 -20 -40 f ZERO1 f ZERO2 -60 0.1k 1k 10k FREQUENCY (Hz) FIGURE 24. ASYMPTOTIC BODE PLOT OF THE VOLTAGE CONTROL LOOP GAIN COMPENSATION BREAK FREQUENCY EQUATIONS 1 ---------------------------------------------------------------------- - ...

Page 24

No trace should be in parallel with it. This trace is also the return path for UGATE. Connect this pin to the high-side MOSFET source. UGATE Pin This pin has a square ...

Page 25

Package Outline Drawing L28.5x5 28 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 10/07 5.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( 4. 65 TYP ) ( 3. 10) TYPICAL RECOMMENDED LAND PATTERN 25 ISL6256, ISL6256A A ...

Page 26

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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