Intersil ISL6252AEVAL2Z Manual
1
®ISL6252AEVAL2Z Evaluation Board
Setup Procedure
Low Cost Multi-Chemistry Battery
Charger Controller
The ISL6252, ISL6252A 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 ISL6252, ISL6252A
provides outputs that are used to monitor the current drawn
from the AC adapter, and monitor for the presence of an AC
adapter. The ISL6252, ISL6252A automatically transitions
from regulating current mode to regulating voltage mode.
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
(ISL6252A)
• 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-Cell 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 (RoHS Compliant)
Applications
• Notebook, Desknote and Sub-notebook Computers
• Personal Digital Assistant
Pinout ISL6252, ISL6252A
(24 LD QSOP)
TOP VIEW
Ordering Information
PART
NUMBER
(Note) PART
MARKING
TEMP
RANGE
(°C) PACKAGE
(Pb-Free) PKG.
DWG. #
ISL6252HAZ* ISL 6252HAZ -10to +100 24 Ld QSOP M24.15
ISL6252AHAZ* ISL6252 AHAZ -10to +100 24 Ld QSOP M24.15
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-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.
DCIN
124
VDD
223
ACPRNACSET
322
CSON
421
CSOP
EN
520
CSIN
CELLS
619
CSIP
ICOMP
718
VCOMP
817
ICM
916
PHASE
VREF
10 15
UGATE
CHLIM
11 14
BOOT
ACLIM
12 13
VDDP
VADJ LGATE
GND PGND
AN1362.0
October 25, 2007
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. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Application Note
2AN1362.0
October 25, 2007
What’s Inside
This Evaluation Board Kit contains the following materials:
• Qty(1) ISL6251EVAL2Z Evaluation Board
• Qty(1) ISL6252EVAL2Z Setup Procedure
What is Needed
The following materials are recommended to perform
testing:
• One adjustable 25V 6A power supply
• Two adjustable electronic loads with constant current
mode and constant voltage mode
• Two DVMs
• One 500MHz four channel oscilloscope
• Four passive oscilloscope voltage probes
• Two 10ADC Current Probes
• One signal generator
Jumper Selection Guide
Step 1: Select the Number of Cells (Table 1)
The CELLS pin chooses the correct output voltage clamp for
a given number of cells series-connected in the battery pack.
Select the output voltage by placing a shunt jumper across
the appropriate pins of JP1.
Step 2: Select the Cell Trim Voltage (Table 2)
The VADJ pin trims the battery charger output voltage limit.
Preset battery charger output voltage limits are selected by
placing a shunt jumper across the appropriate pins of JP6.
For other battery charger output voltage limits install a shunt
jumper across pins 3 and 4 which connects the wiper of
potentiometer R24 to VADJ. Potentiometer R24 may be
removed and replaced with resistors R19 and R21. Resistor
R20 limits the trim increase to 1%. Shorting R20 allows the
trim to increase 5%. Decreasing trim range is unaffected.
Step 3: Select the Battery Charger Current Limit
(Table 3)
The CHLIM pin chooses the desired battery charger current
limit threshold. Preset battery charger current limit
thresholds are selected by placing a shunt jumper across the
appropriate pins of JP4. For other battery charger current
limit thresholds, install a shunt jumper across pins 3 and 4,
which connects the wiper of potentiometer R22 to CHLIM.
Potentiometer R22 may be removed and replaced with
resistors R6and R7.
Step 4: Select the AC Adapter Current Limit (Table 4)
The ACLIM pin chooses the desired AC adapter current limit
threshold. Preset AC adapter current limit thresholds are
selected by placing a shunt jumper across the appropriate
pins of JP5. For other AC adapter current limit thresholds,
install a shunt jumper across pins 3 and 4 which connects the
wiper of potentiometer R23 to ACLIM. Potentiometer R23
may be removed and replaced with resistors R17 and R18.
Interface Connections
TABLE 1. JUMPER JP1 FUNCTIONS
SHUNT
JUMPER
LOCATION
CELLS PIN
CONNECTED
TO:
NUMBER OF
CELLS
CONNECTED
IN SERIES
100%
CONSTANT
OUTPUT
VOLTAGE
1-2 VDD 4 16.8
2-3 GND 3 12.6
Removed Floating 2 8.4
TABLE 2. JUMPER JP6 FUNCTIONS
SHUNT
JUMPER
LOCATION VADJ
PIN BATTERY VOLTAGE
CHANGE PER CELL
1-3 Through R20 to VREF +5%
3-5 To GND -5%
5-6 Floating None
3-4 R24 Wiper or R19/R21 Adjustable between
-5% to +5%
TABLE 3. JUMPER JP4 FUNCTIONS
SHUNT
JUMPER
LOCATION
CHLIM PIN
CONNECTED
TO:
100% CURRENT
FEEDBACK
CSOP TO CSON
100%
CONSTANT
CURRENT
1-3 VREF 120mV 4.80A
Removed Floating 0V 0A
3-5 GND 0V 0A
3-4 R22 or R6/R70mV to 120mV 0A to 4.8A
TABLE 4. JUMPER JP5 FUNCTIONS
SHUNT
JUMPER
LOCATION
ACLIM PIN
CONNECTED
TO:
100% CURRENT
FEEDBACK
CSIP TO CSIN
100%
ADAPTER
CURRENT
1-3 VREF 100mV 5.15A
Removed Floating 75mV 3.90A
3-5 GND 50mV 2.65A
3-4 R23 or R17/R18 50mV to 100mV 2.65A to
5.15A
TABLE 5.
HEADER PIN# CONNECT TO
H1
Input Power 1 “+” INPUT POWER
2 “+” SENSE (if used)
3 “-” SENSE (if used)
4 “-” INPUT POWER
H2
System Load
Output
1 “+” SYSTEM LOAD OUTPUT
2 “+” SENSE (if used)
3 “-” SENSE (if used)
4 “-” SYSTEM LOAD OUTPUT
H3
BatteryCharger
Output
1 “+” BATTERY CHARGER OUTPUT
2 “+” SENSE (if used)
3 “-” SENSE (if used)
4 “-” BATTERY CHARGER OUTPUT
Application Note 1362
3AN1362.0
October 25, 2007
ISL6252AEVAL2Z Schematic
2
4
6
5
3
8
1
7
3
4
1
2
C2
TP19
VADJ_ADJ
R19
DNP
33.2K
R20
50K
L1OUT
0.1UF
LGATE
130K
AC ADAPTER
0.1UF
100K
100K
20K
100PF
VCOMP
ACPRN
FDS6612A
BAT54WT1
NOT POPULATED
ISL6252AHRZ
0.01UF
DNP
NOT POPULATED
VREF
NDS352AP
DNP
CELLS
EN
6800PF
CHLIM
VADJ_LIM
ACLIM
DNP
VADJ
10.2K
DCIN
ACSET
CHLIM_ADJ
0
20K
DNP
BOOT
0
0.1UF
CSOP
CSIP
CSIN
PHASE
0.01UF
22UF
22UF
15UH 0.025
2.2
1UF
0.1UF
NOT POPULATED
BATTERY
NOT POPULATED
SYSTEM
UGATE
4.7
0.1UF
VDD
ICOMP
10UF
ACLIM_ADJ
10K
2.2UF
10K
51
IRF7811AV
0.1UF
0.020
18
DNP
H2
TP26
C12
P2
TP27
H3
P3
TP28
C1
TP29
JP16
C4
R12
C16
JP11JP8
C14
R1
L1
C15
C13
JP10
TP11
R25
JP9
Q1
5
6
7
8
4
1
2
3
Q2
R2
R13
C10
JP17
JP12
D1
C3
JP7
P4
C9
R16
TP24
TP23
D2
C8
R15
Q5
3
1
2
R8R11
TP15
P1
TP25
TP3 TP9
TP16
C7
R14
C6
TP13
C5
TP2
TP10
TP4
TP17
TP18
C11
TP22
JP2
H1
R4
R3
JP3
H4
TP1
TP21
JP1
R23
JP5
TP14
R22
TP7
JP4
R24
TP20
JP6
TP5
TP8
U1
1
10
11
12 13
14
15
16
17
18
19
2
20
21
22
23
24
3
4
5
6
7
8
9
R28
R29
R7
R21
R6
R17R18
1X4
2
1
3
4
6
4
2
1
5
3
1
2
1X4
2
1
3
4
1X3
1
2
3
6
4
2
1
5
3
6
4
2
1
5
3
EN
DCINVDD
CELLS
ICOMP
VCOMP
VREF
ICM
ACSET
CHLIM
ACLIM
VADJ
GND PGND
LGATE
VDDP
BOOT
UGATE
PHASE
CSIP
CSIN
CSOP
CSON
ACPRN
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1X4
2
1
3
4
1
2
1X4
2
1
3
4
1
2
Application Note 1362
4AN1362.0
October 25, 2007
TABLE 6. BILL OF MATERIALS
QTY REF DES DESCRIPTION MFG NAME PART NUMBER
1 C6 Capacitor, SMD, 0603, 100pF, 50V, 5%, COG TDK C1608COG1H101J
1 C7 Capacitor, SMD, 0805, 0.01µF, 50V, 5%, COG TDK C2012COG1H103J
1 C5 Capacitor, SMD, 0805, 6800pF, 50V, 5%, COG TDK C2012COG1H682J
3 C2, C4, C8 Capacitor, SMD, 0805, 1.0µF, 16V, 20%, X7R TDK C2012X7R1C105M
3 C3, C9, C10 Capacitor, SMD, 0805, 0.1µF, 50V, 10%, X7R TDK C2012X7R1H104K
2 C14, C15 Capacitor, SMD, 1812, 22µF, 25V, 20%, X5R TDK C4532X5R1E226M
1D2
SURFACE MOUNT SCHOTTKY BARRIER DIODE Diodes Inc. BAT54WT1
1 L1 Choke, SMD, 8mm, 15µH, 20%, 5.65A, Shielded Sumida CDRH127/LD-150NC
1 U1 IC, Battery Charger, 24 Ld QSOP, -10°C to +100°C Intersil ISL6252HAZ
1 Q2 MOSFET, N-CH, 8P, SOIC, 30V, 8.4A, 0.022ΩFairchild FDS6612A
1 Q1 MOSFET, N-CH, 8P, SOIC, 30V, 10.8A, 0.011ΩIR IRF7811AV
1 Q5 MOSFET, P-CH, 3P, SOT23, -30V, -0.9A, 0.5ΩFairchild NDS352AP
1D1
DIODE SCHOTTKY 40V 10A POWERDI5 Diodes Inc. PDS1040-13
1 R2 Resistor, Shunt, SMD, 2010, 0.020Ω, 1W, 1% IRC LRC-LRF2010-01-R020-F
1 R1 Resistor, Shunt, SMD, 2010, 0.025Ω, 1W, 1% IRC LRC-LRF2010-01-R025-F
1 R13 Resistor, SMD, 0805, 18Ω, 0.125W, 5% KOA RK73B2AT180J
1 R12 Resistor, SMD, 0805, 2.2Ω, 0.125W, 5% KOA RK73B2AT2R2J
1 R15 Resistor, SMD, 0805, 4.7Ω, 0.125W, 5% KOA RK73B2AT4R7J
1 R14 Resistor, SMD, 0805, 10kΩ, 0.125W, 1% KOA RK73H2AT1002F
1 R11 Resistor, SMD, 0805, 7.87kΩ, 0.125W, 1% KOA RK73H2AT7871F
3 R3, R4, R8 Resistor, SMD, 0805, 100kΩ, 0.125W, 1% KOA RK73H2AT1003F
1 R20 Resistor, SMD, 0805, 33.2kΩ, 0.125W, 1% KOA RK73H2AT3322F
1 R16 Resistor, SMD, 0805, 0Ω, 2A, 50mΩMax KOA RK73Z2AT
Application Note 1362
5AN1362.0
October 25, 2007
FIGURE 1. TOP SILK
Application Note 1362
6AN1362.0
October 25, 2007
FIGURE 2. TOP LAYER
Application Note 1362
7AN1362.0
October 25, 2007
FIGURE 3. LAYER 2 GROUND (TOP VIEW)
Application Note 1362
8AN1362.0
October 25, 2007
FIGURE 4. LAYER 3 SIGNAL (TOP VIEW)
Application Note 1362
9AN1362.0
October 25, 2007
FIGURE 5. LAYER 4 GROUND (TOP VIEW)
Application Note 1362
10 AN1362.0
October 25, 2007
FIGURE 6. LAYER 5 GROUND (TOP VIEW)
Application Note 1362
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