Intersil ISL6252AEVAL2Z Manual

®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

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.

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

Input Power 1 “+” INPUT POWER

2 “+” SENSE (if used)

3 “-” SENSE (if used)

4 “-” INPUT POWER

System Load

Output

1 “+” SYSTEM LOAD OUTPUT

2 “+” SENSE (if used)

3 “-” SENSE (if used)

4 “-” SYSTEM LOAD OUTPUT

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

TP19

VADJ_ADJ

R19

DNP

33.2K

R20

50K

L1OUT

0.1UF

LGATE

130K

AC ADAPTER

0.1UF

100K

20K

100PF

VCOMP

ACPRN

FDS6612A

BAT54WT1

NOT POPULATED

ISL6252AHRZ

0.01UF

DNP

NOT POPULATED

VREF

NDS352AP

DNP

CELLS

6800PF

CHLIM

VADJ_LIM

ACLIM

DNP

VADJ

10.2K

DCIN

ACSET

CHLIM_ADJ

20K

DNP

BOOT

0.1UF

CSOP

CSIP

CSIN

PHASE

0.01UF

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

IRF7811AV

0.1UF

0.020

DNP

TP26

C12

TP27

TP28

TP29

JP16

R12

C16

JP11JP8

C14

C15

C13

JP10

TP11

R25

JP9

R13

C10

JP17

JP12

JP7

R16

TP24

TP23

R15

R8R11

TP15

TP25

TP3 TP9

TP16

R14

TP13

TP2

TP10

TP4

TP17

TP18

C11

TP22

JP2

JP3

TP1

TP21

JP1

R23

JP5

TP14

R22

TP7

JP4

R24

TP20

JP6

TP5

TP8

12 13

R28

R29

R21

R17R18

1X4

1X3

DCINVDD

CELLS

ICOMP

VCOMP

VREF

ICM

ACSET

CHLIM

ACLIM

VADJ

GND PGND

LGATE

VDDP

BOOT

UGATE

PHASE

CSIP

CSIN

CSOP

CSON

ACPRN

1X4

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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