an1746

Application Note 1746
ISL9230EVAL1Z Evaluation Board Application Manual
Description
Features
The ISL9230 is a fully integrated high input voltage single-cell
Li-ion battery charger with power path management function.
This charger performs the CC/CV charge function required by
Li-ion batteries. The charger can withstand an input voltage up
to 26V but is disabled when the input voltage exceeds 6.6V
OVP threshold. The input current limit and charge current are
programmable with external resistors. When the battery
voltage is lower than 3.0V, the charger preconditions the
battery with 10% of the programmed charge current. When the
charge current reduces to the programmable end-of-charge
(EOC) current level during the CV charge phase, the EOC
indicator (CHG) will toggle to a logic High to indicate the
end-of-charge condition.
• Complete Charger for Single-Cell Li-ion/Polymer Batteries
The ISL9230 uses separate power paths to supply the system
load and charge the battery. This feature allows the system to
immediately operate with a completely discharged battery.
This feature also allows the charge to terminate when the
battery is full while continuing to supply the system power
from the input source, thus minimizing unnecessary
charge/discharge cycles and prolonging the battery life.
• Power Presence and Charge Indications
Two indication pins (PG and CHG) allow simple interface to a
microprocessor or LEDs.
The following instruments will be needed to perform testing:
Ordering Information
PART #
ISL9230EVAL1Z
DESCRIPTION
Evaluation Board for ISL9230
• Current Path Management Optimize for Charge and System
Currents
• Intelligent Timeout Interval Based on Actual Charge Current
• 1% Charger Output Voltage Accuracy
• Programmable Input Current Limit
• Programmable Charge Current
• Charge Current Thermal Foldback for Thermal Protection
• Trickle Charge for Fully Discharged Batteries
• 26V Maximum Voltage at VIN Pin
• Ambient Temperature Range: -40°C to +85°C
• 16 Ld 3x3 TQFN Package
• Pb-Free (RoHS Compliant)
What is Needed
• Power Supplies:
- PS1: DC 30V/2A
- PS2: DC 20V/2A
• DC Electronic Load: 20V/2A
• Multimeters
• Function Generator
• Oscilloscope
• Cables and Wires
March 30, 2012
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Copyright Intersil Americas Inc. 2012. All Rights Reserved.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Application Note 1746
Quick Setup Guide (Refer to Figure 1)
Step 6:
Configure jumper shunts on JP12, JP13, JP4 and
JP5 to set maximum input current limit
DO NOT APPLY POWER UNTIL STEP 7
Step 7:
Turn on Power Supplies and DC electronic load
Step 1:
Connect a 5V supply PS1 capable of delivering
1.5A current (see Figure 1)
Step 8:
LEDs D1 and D2 should be on, indicating normal
charging operation
Step 2:
Connect a 3.7V supply PS2 with current capability
1.5A (see Figure 1)
Step 9:
Turn off E-load 2 to check charge current only
Step 3:
Connect voltmeters V1, V2 and V3 to monitor VIN,
VBAT and VOUT (see Figure 1)
Step 10:
Check charge currents as configured in Table 3
Step 11:
Step 4:
Connect a 2nd DC electronic load at CC mode,
E-load 2 (see Figure 1)
Step 5:
Insert a thermistor of type 103AT between 2 and
3 of jumper header JP9, or place a jumper shunt
between pin 1 and 2 to use the on board 10k
resistor to skip the NTC evaluation
With a fixed charge current at CC mode, turn on
E-load 2 at constant current mode and slowly
increase the current, monitor the currents out of
both J1 and J3, until the current at J1 starts to
decrease. Further increase of the current at J3 will
result in a current decrease at J1 at the same
rate, indicating that the power DPPM function if
working
PS1
V2
V1
+
V1
V2
V3
PS2
-
-
+
+
E- Load1
+
-
E- Load2
FIGURE 1. CONNECTION OF INSTRUMENTS
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Application Note 1746
Detailed Description
The ISL9230EVAL1Z is a complete evaluation platform
addressing all datasheet specifications and functions. The
jumpers on the board facilitate the necessary connections, such
as current measurement.
Jumper Settings
JP1 - Insert a shunt installed between pin1 and pin2 to disable
the charging function. Install a shunt between pin2 and pin3 to
enable the charging function.
JP2 - Install or remove a jumper shunt to set the fast charge
current as shown in Table 3.
JP3 - Install or remove a jumper shunt to set the fast charge
current as shown in Table 3.
JP4 - Selects the input current limit along with JP5, as shown on
Table 2. A shunt installed between pin1 and pin2 pulls the
AC/USB pin to high through the internal pull-up resistor. If a shunt
is installed between 2 and 3, the AC/USB is pulled to low.
JP5 - Selects the input current limit along with JP4, as shown in
Table 2. A shunt installed between pin1 and pin2 pulls the Mode
pin to high through the internal pull-up resistor. If a shunt is
installed between 2 and 3, the Mode is pulled to low.
JP8 - A shunt installed between pin1 and pin2 sets the TIME pin
to use the on board resistor (49.9k) to set the timeout interval. If
the shunt is installed between pin2 and pin3, the default timeout
is used. Connect an external resistor on pin2 and pin3 to set
other timeout intervals.
JP9 - Thermistor input. Connect a thermistor of type 103AT with
10k @ RT, between pin2 and pin3. If temperature monitoring is
not needed, simply install a jumper shunt on pin1 and pin2 to
connect the on board 10k resistor to GND to skip the NTC
function.
TABLE 1. INPUT CURRENT LIMIT SETTINGS FOR AC/USB = 1 AND
MODE = 0
RESISTOR VALUE
ILIM
JP12 and JP13 OFF
3.09k
493mA
JP12 ONand JP13 OFF
1.62k
993mA
JP12 OFF and JP13 ON
1.56k
1030mA
JP12 and JP13 ON
1.07k
1505mA
TABLE 2. INPUT CURRENT LIMIT SELECTION
JUMPER
AC/USB
MODE
DESCRIPTION
Shunt on 2-3 JP4
Shunt on 2-3 JP5
0
0
USB 100mA limit
Shunt on 2-3 JP4
Shunt on 1-2 JP5
0
1
USB 500mA limit
Shunt on 1-2 JP4
Shunt on 2-3 JP5
1
0
RLIM current programming
Shunt on 1-2 JP4
Shunt on 1-2 JP5
1
1
Suspend mode
TABLE 3. FAST CHARGE CURRENT SETTINGS
RESISTOR VALUE
ICHG
JP2 and JP3 OFF
1.96k
454mA
JP2 ON and JP3 OFF
1.1k
809mA
JP2 OFF and JP3 ON
1.08k
820mA
JP2 and JP3 ON
0.68k
1309mA
JP10 - A shunt installed between pin1 and pin2 sets the
continuous mode, i.e., the charger continues to deliver current to
the battery after an EOC condition has been reached. If the shunt
is installed between pin2 and pin3, the charge will be terminated
when the EOC current is reached.
JP11 - Install a jumper shunt to use VIN as the bias power for the
LEDs and the internal pull-up source. If an external source is used
for these housekeeping sources, connect a 5V supply between
pin 1 and GND.
JP12 - Install or remove a jumper shunt to set the input current
limit as shown in Table 2.
JP13 - Install or remove a jumper shunt to set the input current
limit as shown in Table 2.
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Application Note 1746
Board Layout Information
Schematic of PCB Board
TP13
1
2
VCC
VIN
JP10
R6
TP1
D1
TP14
TIME
1
2
TP4
VCC
1 R1
2
3
C5
C3
16
15
14
13
C2
R12
U1
1
2
3
4
NTC
VBAT
VBAT
/CHGEN
/CHGEN
R13
12
ILIM
TP10
VOUT
12
11
10
9
ILIM
VOUT
VOUT
/CHG
TP9
/CHG
TP7
PG
R14
R15 R16
J3
C8
ISL9230
5
6
7
8
JP1
C4
IREF
TP2
VBAT
J1
D2
D3
TP16
1 R7 NTC
2
3
R2
R3
R4
C1
R17
JP2
1
2
JP4
1
1
2
2
3
3
JP3
1
2
1
2
J2
TP15
IREF
CONT
TIME
VIN
JP9
C7
VCC
JP11
Q1
CONT
1
2
3
C9
R9
R8
AC/USB
MODE
PG
GND
JP8
1
2
3
JP5
TP5
AC/USB
R11
1
2
3
JP12 JP13
2
2
1
1
C6
1
2
R10
TP6
MODE
FIGURE 2. SCHEMATIC
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Application Note 1746
=
PCB Layout
FIGURE 3. SILK LAYER
FIGURE 4. TOP LAYER
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Application Note 1746
PCB Layout
(Continued)
FIGURE 5. BOTTOM LAYER
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Application Note 1746
ISL9230EVAL1Z Bill Of Materials
ITEM
QTY
REFERENCE
1
1
U1
2
2
R1, R8
3
1
4
PART DESCRIPTION
PCB FOOTPRINT
PART NUMBER
ISL9230
VENDOR
Charger IC
3x3 TQFN
10k
0603
Any
R2
1.96k 1%
0603
Any
1
R3
2.49k, 1%
0603
Any
5
1
R4
2.43k, 1%
0603
Any
6
1
R6,
49.9k, 1%
0603
Any
7
3
R7, R10, R11
10k, 1%
0805
Any
8
1
R9
3.3k, 5%
0603
Any
9
2
R12, R13
330Ω, 5%, SMD Resistor
0805
10
1
R14
3.09k 1%
603
Any
11
1
R15
3.4k 1%
603
Any
12
1
R16
3.16k 1%
603
Any
13
1
R17
301k 1%
0805
Any
14
1
C1
2.2µF/6.3V, X7R Ceramic
0603
Any
15
1
C2
0.1µF/6.3V, X7R Ceramic
0402
Any
16
1
C3
0.1µF/35V, X7R Ceramic
0402
Any
17
3
C4, C5, C9
0.1µF, 50V, X7R Ceramic
0603
18
1
C6
0.1µF, 50V, X7R Ceramic
805
19
1
C7
4.7µF, 35V, Tantalum
6032-28
20
1
C8
4.7µF, 6.3V, X7R Ceramic
1206
21
1
D1
RED
SML-LX1206IW-TR
67-1003-2-ND
Digikey
22
1
D2
GREEN
SML-LX1206GW-TR
67-1002-2-ND
Digikey
23
1
D3
DIODE ZENER 6.2V 500MW
SOD-123
BZT52C6V2-7-F
Digikey
24
1
Q1
60V, 1A NPN transistor
SOT-23
FMMT491TA
Zetex
25
10
General test
points
TEST POINT
TEST POINT PC MULTI PURPOSE YEL
5014K-ND
Digikey
26
3
GND
TEST POINT
TEST POINT PC MULTI PURPOSE BLK
5011K-ND
Digikey
27
3
VIN, VBAT, VOUT TEST POINT
TEST POINT PC MULTI PURPOSE RED
5010K-ND
Digikey
28
5
JP2, JP3, JP11, CON2
JP12, JP13
JUMPER
538-22-28-4020
Mouser
29
6
JP1, JP4, JP5,
JP8, JP9, JP10
CON3
JUMPER
538-22-28-4020
Mouser
30
3
J1, J2, J3
CONN
CONN HEADER VERT 2POS 0.100 TIN
A1921-ND
Digikey
ERJ-6GEYJ331V
ECJ-1VB1H104K
Intersil
Panasonic
Panasonic
Any
ECS-T1VC475R
Any
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
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