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 AN1749.1 1 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 2 AN1749.1 June 5, 2012 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 AN1749.1 June 5, 2012 Application Note 1749 PCB Layout FIGURE 3. ISL9211AEVAL1Z SILKSCREEN TOP FIGURE 4. ISL9211AEVAL1Z TOP COPPER 4 AN1749.1 June 5, 2012 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 5 AN1749.1 June 5, 2012