an1749

Application Note 1749
Author: Sameer Dash
ISL9211AEVAL1Z Evaluation Board User Guide
Description
Ordering Information
The ISL9211AEVAL1Z is an evaluation kit for evaluating Li-ion
battery charger protection IC. This evaluation kit is designed to
deliver up to 800mA charge current to battery application.
The ISL9211A protects the charging system from three circuit
failures:
1. Input overvoltage
PART #
DESCRIPTION
ISL9211AIRU48XZE1Z
EVB for ISL9211A 4.8V OVP
ISL9211AIRU58XZE1Z
EVB for ISL9211A 5.8V OVP
ISL9211AIRU68XZE1Z
EVB for ISL9211A 6.8V OVP
Key Features
2. Short circuit in charging system
3. Battery over-charge
When any of the three parameters exceeds its limit, the IC
turns off an internal N-channel MOSFET to disconnect the flow
of power from the charging system to the battery.
The ISL9211A has three input OVP options: 4.8V, 5.8V and
6.8V. Please refer to the ISL9211A datasheet for more details.
• A complete evaluation platform for the ISL9211A charging
system protection IC
• Accepts input voltage up to 24V
• Test points for key signal measurements
• RoHS compliant
Required Equipment
ISL9211A
(8 LD µTDFN)
TOP VIEW
The following equipment will be needed to perform testing:
VIN
1
8
OUT
GND
2
7
ILIM
• Power Supplies:
- PS1: DC 30V/2A
- PS2: DC 10V/2A
NC
3
6
VB
• DC Electronic Load: 20V/2A
FAULT
4
5
EN
• Multimeters
• Oscilloscope
• Cables and Wires
June 5, 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 1749
Quick Setup Guide
Step 2:
Voltmeter #2 should read 0V.
DO NOT APPLY POWER UNTIL STEP 6
Step 3:
Decrease voltage of PS#1 to 5V.
Step 1:
Set power supply, PS#1 to 5V and current limit to 2A,
and connect it to VIN pin of the board.
Step 4:
Voltmeter #2 should read 5V.
Step 2:
Connect a voltmeter #1 across VIN and GND.
Step 3:
Set PS#2 to 3.6V and current limit to 0.2A. Then
connect the power supply to VBAT of the board.
Step 4:
Connect electronic-load in series with a current
meter to OUT pin.
Step 5:
Connect the voltmeter #2 across OUT and GND.
Step 6:
Turn on PS#1. Voltmeter #1 should read 5V, and
voltmeter #2 should read 5V.
OVERCURRENT PROTECTION
Step 1:
Turn on the E-load. Increase the current of the load
to 1A ±70mA reading on the current meter.
Step 2:
Voltmeter #2 reads 0V.
Step 3:
Turn off the E-load.
Step 4:
Voltage #2 reads 5V
BATTERY OVERVOLTAGE PROTECTION
Step 1:
Turn on PS#2.
Test Procedure
Step 2:
Increase the voltage of PS#2 to 4.6V.
INPUT OVERVOLTAGE PROTECTION
Step 3:
Voltmeter #2 reads 0V.
Step 1:
Step 4:
Decrease the voltage of PS#2 to 3.6V.
Step 5:
Voltmeter #2 reads 5V.
Increase PS#1 to 4.8V ±200mV for 4.8V option IC,
5.8V ± 200mV for 5.8V option IC and to 6.8V
±200mV for 6.8V option IC.
E - Load
PS1
V1
-
+
+
I1
-
V2
PS2
-
+
FIGURE 1. ISL9211AEVAL1Z EVALUATION BOARD TEST SETUP
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Application Note 1749
Board Design
ISL911AEVAL1Z Schematic
BATT
BAT
R2
220k
VIN
U1
1
VIN
C1
1µF, 25V
2
R1
10k
3
VIN
OUT
GND
ILIM
NC
VB
4 FAULT
OUT
8
OUT
ILIM
7
VB
6
C2
0.1µF,25V
R3
R5
24.9k
EN 5
FAULT
ISL9211A
FIGURE 2. ISL9211AEVAL1Z EVALUATION BOARD SCHEMATIC
TABLE 1. ISL9211AEVAL1Z BILL OF MATERIALS
ITEM
QTY
REFERENCE
1
2
C1,C2
1µF, 25V
1206
C3216X7R1E105M
TDK
2
1
R1
10k
603
Resistor
Any
3
1
R2
220k
603
Resistor
Any
4
1
R5
24.9k
603
Resistor
Any
5
1
U1
ISL9211A
µTDFN2x2
ISL9211A
INTERSIL
6
7
VIN, OUT, ILIM, BATT, VB, EN, FAULT
Test Point
TERMINAL PIN TURRET
0.082
2110-2-00-80-00-00-07-0
MILL MAX
7
4
GND
Test Point
TERMINAL PIN TURRET
0.082
2110-2-00-80-00-00-07-0
MILL MAX
3
PART DESCRIPTION
FOOTPRINT
PART NUMBER
VENDOR
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Application Note 1749
PCB Layout
FIGURE 3. ISL9211AEVAL1Z SILKSCREEN TOP
FIGURE 4. ISL9211AEVAL1Z TOP COPPER
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Application Note 1749
PCB Layout (Continued)
FIGURE 5. ISL9211AEVAL1Z BOTTOM COPPER
=
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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