ISL6251AHRZ-T Intersil, ISL6251AHRZ-T Datasheet

ICBATTERY CHARGER CTRLR 28-QFN

ISL6251AHRZ-T

Manufacturer Part Number
ISL6251AHRZ-T
Description
ICBATTERY CHARGER CTRLR 28-QFN
Manufacturer
Intersil
Datasheet

Specifications of ISL6251AHRZ-T

Function
Charge Management
Battery Type
Li-Ion, Li-Pol, NiMH
Voltage - Supply
7 V ~ 25 V
Operating Temperature
-10°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
28-VFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL6251AHRZ-T
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
ISL6251AHRZ-T
Manufacturer:
INTERSIL
Quantity:
16 443
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
NOTES:
ISL6251HRZ
ISL6251HAZ
ISL6251AHRZ ISL6251AHRZ -10 to 100 28 Ld 5x5 QFN L28.5×5
ISL6251AHAZ ISL6251AHAZ -10 to 100 24 Ld QSOP
1. Intersil Pb-free plus anneal products employ special Pb-free
2. Add “-T” for Tape and Reel.
(Notes 1, 2)
NUMBER
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.
PART
ISL6251HRZ
ISL6251HAZ
MARKING
PART
®
-10 to 100 28 Ld 5x5 QFN L28.5×5
-10 to 100 24 Ld QSOP
RANGE
1
TEMP
(°C)
Data Sheet
PACKAGE
(Pb-Free)
M24.15
M24.15
DWG. #
PKG.
1-888-INTERSIL or1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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
• 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 Plus Anneal Available (RoHS Compliant)
Applications
• Notebook, Desknote and Sub-notebook Computers
• Personal Digital Assistant
(ISL6251A)
Limit and Charge Voltage
Diode Emulation at Light Load
All other trademarks mentioned are the property of their respective owners.
May 10, 2006
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005-2006. All Rights Reserved
ISL6251, ISL6251A
FN9202.2

Related parts for ISL6251AHRZ-T

ISL6251AHRZ-T Summary of contents

Page 1

... Ld 5x5 QFN L28.5×5 ISL6251HAZ ISL6251HAZ -10 to 100 24 Ld QSOP ISL6251AHRZ ISL6251AHRZ -10 to 100 28 Ld 5x5 QFN L28.5×5 ISL6251AHAZ ISL6251AHAZ -10 to 100 24 Ld QSOP NOTES: 1. 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 ...

Page 2

Pinouts ISL6251, ISL6251A (28 LD QFN) TOP VIEW CELLS 2 ICOMP 3 VCOMP 4 ICM 5 VREF 6 CHLIM ISL6251, ISL6251A 23 22 CSOP 21 CSIN ...

Page 3

Absolute Maximum Ratings DCIN, CSIP, CSON to PGND . . . . . . . . . . . . . . . . . . . -0.3V to +28V CSIP-CSIN, CSOP-CSON . . . . . . . . ...

Page 4

Electrical Specifications DCIN = CSIP = CSIN = 18V, CSOP = CSON = 12V, ACSET = 1.5V, ACLIM = VREF, VADJ = Floating VDD = 5V, BOOT-PHASE = 5.0V, GND = PGND = 0V, C ≤ 125°C, unless ...

Page 5

Electrical Specifications DCIN = CSIP = CSIN = 18V, CSOP = CSON = 12V, ACSET = 1.5V, ACLIM = VREF, VADJ = Floating VDD = 5V, BOOT-PHASE = 5.0V, GND = PGND = 0V, C ≤ 125°C, unless ...

Page 6

Typical Operating Performance 0.6 0.6 0.3 0 -0.3 -0.3 -0.6 -0 LOAD CURRENT (mA) LOAD CURRENT (mA) FIGURE 1. VDD LOAD REGULATION ...

Page 7

Typical Operating Performance BATTERY BATTERY INSERTION INSERTION VCOMP VCOMP ICOMP ICOMP FIGURE 7. BATTERY INSERTION AND REMOVAL FIGURE 9. SWITCHING WAVEFORMS IN CC MODE 7 ISL6251, ISL6251A DCIN = 20V, 4S2P Li-Battery, T INDUCTOR INDUCTOR CURRENT CURRENT 2A/div 2A/div BATTERY ...

Page 8

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. LGATE LGATE is the low side ...

Page 9

ISL6251, ISL6251A ICM ICM ACSET ACSET ACPRN ACPRN + + - - 1.26V 1.26V VREF VREF VREF VREF + + + - - - 152K 152K 152K 152K Adapter Adapter 1.27V 1.27V Current Current ACLIM ACLIM Limit Set Limit Set ...

Page 10

AC ADAPTER R8 D3 130k 1% R9 DCIN DCIN 10.2k 1% ACSET ACSET C7 C7 1µF VDDP VDDP R10 3.3V 4.7Ω VDD VDD C9 R5 1µF 100k To Host ACPRN ACPRN Controller C6:6.8nF ICOMP ICOMP R6:10k C5:10nF VCOMP VCOMP FLOATING ...

Page 11

AC ADAPTER R8 130k 1% R9 10.2k,1% C7 R10 1µF 4.7Ω VCC R5 C9 DIGITAL 100k 1µF INPUT D/A OUTPUT OUTPUT R7: 100Ω A/D INPUT C11 3300pF 5.15A INPUT CURRENT LIMIT C6 HOST 6.8nF R6 C5 10k 10nF AVDD/VREF R11, ...

Page 12

Theory of Operation Introduction The ISL6251, ISL6251A includes all of the functions necessary to charge cell Li-Ion and Li-polymer batteries. A high efficiency synchronous buck converter is used to control the charging voltage and charging current up ...

Page 13

R and R are external resistors at bot_VADJ top_VADJ VADJ. To minimize accuracy loss due to interaction with VADJ’s internal resistor divider, ensure the AC resistance looking back into the external resistor divider is less than 25k. Connect CELLS ...

Page 14

A low pass filter is suggested to eliminate the switching noise. Connect the resistor to CSIN pin instead of CSIP pin because CSIN pin has lower bias current and less influence on the current-sense accuracy. AC Adapter Detection Connect the ...

Page 15

The core must be large enough not to saturate at the peak inductor current I 1 Δ Peak BAT , MAX L 2 Output Capacitor Selection The output capacitor ...

Page 16

As a general rule, select a diode with DC current rating equal to one-third of the load current. One option is to choose a combined MOSFET with the Schottky diode in a single package. The integrated packages may work better ...

Page 17

Current loop gain T (S) is expressed as the following i equation 0. where R is the trans-resistance in current loop usually equal to the ...

Page 18

PCB Layout Considerations Power and Signal Layers Placement on the PCB As a general rule, power layers should be close together, either on the top or bottom of the board, with signal layers on the opposite side of the board. ...

Page 19

... Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance. 8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389 Features and dimensions A2, A3, D1, E1, P & θ are present when Anvil singulation method is used and not present for saw singulation ...

Page 20

... 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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