an1060

ISL6292EVAL1Z Evaluation Board
®
Application Note
January 26, 2007
AN1060.1
Description
Features
The ISL6292EVAL1Z is a complete platform for the
evaluation on all datasheet specifications and functionalities.
The on board 9-bit DIP switch facilitates programming
charging current, setting EN input, temperature monitoring
status, and so on. The four jumpers can set up input source
selection, USB mode selection, and can be used to make
other necessary connections.
• 9-bit DIP switch for conveniently setting up charging
current, battery thermal status, EN input, and so on.
The ISL6292EVAL1Z board is intended to provide an
evaluation platform for the 3x3mm2 DFN ISL6292 package,
the single-cell Li-ion battery charger.
• Different jumpers for input source selection, USB mode
selection, and the convenience of current measurement.
• Several exposed soldering pads connected to STATUS,
FAULT, TIME, EN, V2P8 and TEMP functional pins to
accommodate experimental testing that need extra
connections to those pins.
• Board size 3.5x2.5 square inches for the convenience of
evaluation.
Assembled in the center square, the components constitute
a complete charger solution, demonstrating the space
saving advantage of the ISL6292 in limited space
applications.
• Eight thermal vias in the thermal pad simulating the
customers’ thermal enhanced environment.
LEDs connected to STATUS and FAULT pins will indicate
the normal charging status or fault condition.
What Is Inside
On board jumpers and a DIP switch accomodate different
operating conditions for the charger.
• ISL6292EVAL1Z board
Pinout
• This ISL6292EVAL1Z Application Note
ISL6292
(3X3 DFN)
TOP VIEW
• Pb-free plus anneal available (RoHS compliant)
The Evaluation Kit contains:
• The ISL6292 Data Sheet
• Errata (for preliminary reference only)
What Is Needed
VIN
1
10 VBAT
FAULT
2
9
TEMP
STATUS
3
8
IREF
TIME
4
7
V298
GND
5
6
EN
The following instruments will be needed to perform testing:
• Power supplies:
1. PS1: DC 20V/5A,
2. PS2: DC (sinks current) 20V/5A, such as
Agilent 6654A
• Electronic load: 20V/5A
• Multimeters
• Function generator
Ordering Information
• Oscilloscope
PART #
DESCRIPTION
• Cables and wires
ISL6292EVAL1Z Evaluation Board for the 3x3 DFN Package Part
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2003, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Application Note 1060
Quick Setup Guide
Step 1:
TABLE 2. JUMPER SETTINGS
Switch on bit 4 and bit 7 of the Dip-switch. Leave all
other bits off, see Figure 1
JUMPER
JP1
DO NOT APPLY POWER UNTIL STEP 6
JP2
POSITION
FUNCTION
USB TO VIN
USB connection
WALL CUBE
TO VIN
Wall adapter connection
Installed
Connect VBAT pin to battery
current meter can replace shunt
not installed
Default
installed
Battery attached to Thermistor at J2
Step 2:
Connect 5V on VIN.
Step 3:
Connect 3.7V on VBAT.
Step 4:
Connect 1.2A electronic load on VBAT.
Step 5:
Verify that no shunts across all jumpers.
Step 6:
Turn on Power Supplies and electronic load.
Step 7:
Green LED should be on, indicating normal
charging operation.
Initial Board Jumper Positioning (Refer to
Figure 3)
Step 8:
If current meter is in series with VIN, it shall read 1A
as the charging current.
JP1 - Selects the VIN pin to be connected to either wall
adapter, or to USB connector. If J1 connector is being used,
a shunt must be installed across ‘WALL CUBE TO VIN’, or if
J3 (USB) connector is being used a shunt must be installed
across ‘USB TO VIN’. J1, J3 and JP1 can be ignored if
power supply is connected directly to VIN test point, which is
directly connected to VIN pin of the IC. A current meter can
replace the shunt mentioned above, so as to measure the
input current.
JP3
IREF and V2P8 USB 500mA
JP4
DIP Switch Settings
A 9-bit DIP switch is provided to set up voltage, current
reference, end-of-charge (EOC) current, and so on. The
functionality of the bits are described in Table 1.
.
ON
OFF
1 2 3 4 5 6 7 8 9
FIGURE 1. INITIAL DIP SWITCH SETTINGS
TABLE 1. DIP SWITCH PIN DESCRIPTIONS
BIT DESCRIPTION
1
Adjustable
TIMEOUT
ON
OFF
5 hours
50 mins
REMARK
3 hours
30 mins
2
not connected
3
Charger
enable/disable
charger
disabled
charger
enabled
4
IREF setting 1
Add 0.5A
5
IREF setting 2
Add 1A
ICHG = 0.5A
When both off
6
IREF and GND USB 100mA
JP2 - Can connect the VBAT pin to the battery. If the J2
connector is being used, a shunt must be installed across
JP2. In this case, a current meter can also replace the shunt
to measure the VBAT current.
JP3 - Can connect the TEMP pin to the battery. Usually no
shunt is needed for JP3, as the Eval board can simulate
various battery thermal conditions. Only when a battery
attached with a thermistor is applied on J2 does it become
necessary to install a shunt across JP3, and at the same
time bit 7, 8, 9 on the DIP switch need to be turned all off.
JP4 - Selects USB modes: a shunt across IREF and V2P8
will set USB 500mA mode, a shunt across IREF and GND
will set USB 100mA mode. When the charge current is
programmed by the resistors connected to IREF pin, no
shunt should be installed on JP4.
not connected
7
TEMP normal
normal
8
TEMP high
too hot
9
TEMP low
too cold
All off
simulates
battery
removal
2
AN1060.1
January 26, 2007
Application Note 1060
FIGURE 2. CONNECTION OF INSTRUMENTS
3
AN1060.1
January 26, 2007
Board Layout Information
Schematic of PCB Board
4
Application Note 1060
AN1060.1
January 26, 2007
FIGURE 3. BOARD LAYOUT INFORMATION SCHEMATIC
Application Note 1060
Bill Of Materials
BOM FOR ISL6292EVAL1Z
ITEM
QUANTITY
REFERENCE
PCB FOOTPRINT
PART NUMBER
VENDOR
1
1
C1
1μF/10V, X5R Ceramic Cap
0603
C1608X5R1A105K
TDK
2
1
C2
10μF/6.3V Tantalum Cap
2.05X1.3X1.2
TAJR106M006
AVX
3
1
C3
15nF/16V, X7R Ceramic Cap
0402
C1005X7R1C153K
TDK
4
1
C4
0.1μF/16V, Y5V Ceramic Cap
0402
C1005Y5V1C104ZT
TDK
5
1
C5
10nF/16V, X7R Ceramic Cap
0402
C1005X7R1C103K
TDK
6
1
C6
10μF/16V, Tantalum Cap
3.2X1.6X1.6
TAJA106M016
AVX
7
1
D1
Green LED
0805
67-1553-1-ND
DigiKey
8
1
D2
Red LED
0805
67-1552-1-ND
DigiKey
9
2
R1, R2
1k, 5%
0603
Various
10
1
R3
10k, 1%
0402
Various
11
1
R4
160k, 1%
0402
Various
12
1
R6
160k, 1%
0805
Various
13
1
R7
80k, 1%
0805
Various
14
1
R9
5k, 1%
0805
Various
15
1
R10
500, 1%
0805
Various
16
1
R11
18k, 1%
0805
Various
17
1
J1
2.54mm Male Header, 2ckt (R/A)
A23879-ND
DigiKey
18
1
J2
2.54mm Male Header, 3ckt (R/A)
A23880-ND
DigiKey
19
2
JP1, JP4
2.54mm Male Header, 3ckt
WM6403-ND
DigiKey
20
2
JP2, JP3
2.54mm Male Header, 2ckt
WM6402-ND
DigiKey
21
1
J3
USB Receptacle, B Type
787780-1-ND
DigiKey
22
1
SW1
DIP Switch, 9 POS, SMT
CKN1323-ND
DigiKey
23
1
U1
ISL6292
Intersil
24
6
VIN, VBAT, TIME,
GND1, GND2, GND3
5002K-ND
DigiKey
5
PART DESCRIPTION
Single-Cell Li-ion Battery Charger
Test Point
10-pin, 3X3 DFN
AN1060.1
January 26, 2007
Application Note 1060
PCB Layout
FIGURE 4. SILK LAYER
FIGURE 5. TOP (LAYER 1, SIGNAL)
FIGURE 6. INTERNAL (LAYER 2, GND)
FIGURE 7. INTERNAL (LAYER 3, FLOATING
FIGURE 8. BOTTOM (LAYER 4, GND)
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to
verify that the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
6
AN1060.1
January 26, 2007
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