Intersil ISL6252AEVAL2Z, Setup Procedure

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2
AN1362.0
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 R
19
and R
21
. Resistor
R
20
limits the trim increase to 1%. Shorting R
20
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 R
6
and R
7
.
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 R
17
and R
18
.
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 R
20
to VREF +5%
3-5 To GND -5%
5-6 Floating None
3-4 R24 Wiper or R
19
/R
21
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 R
6
/R
7
0mV 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 R
17
/R
18
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
Battery Charger
Output 1 “+” BATTERY CHARGER OUTPUT
2 “+” SENSE (if used)
3 “-” SENSE (if used)
4 “-” BATTERY CHARGER OUTPUT
Application Note 1362