ISL9301EVAL1Z Evaluation Board Application Manual ® Application Note March 31, 2008 AN1338.1 Description What is Needed The ISL9301EVAL1Z is an evaluation tool for the ISL9301 single-cell Li-ion battery charger. The evaluation tool provides a complete evaluation platform addressing all datasheet specifications and functionality. The jumpers on the board facilitate the programming of the charge current, different charging conditions, and can be used to make other necessary connections, such as current measurement. The following instruments will be needed to perform testing: The ISL9301 is a Li-ion battery charger with power path management function. It 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 with the input source, thus minimizes unnecessary charge/discharge cycles and improves the battery life. The ISL9301 accepts input voltages ranging from 4.5V up to 28V. Due to the high voltage capability, the components associated with the input circuit on the evaluation board are good for a 28V supply. • Power supplies: - PS1: DC 30V/2A - PS2: DC 0V to 5V, 1.5A - DC Electronic load: 20V/2A • Multimeters • Oscilloscope • Cables and wires Quick Setup Guide (Refer to Figure 1) DO NOT APPLY POWER UNTIL STEP 6 Step 1: Step 2: Step 3: Step 4: Step 5: The components assembled in the center square constitute a complete charger, indicating the space saving advantage of the typical ISL9301 installation in space-limited applications. Step 6: Key Features Step 7: • Complete Charger for Single-Cell Li-ion/Polymer Batteries • Power Path Management Optimize Charge and System Currents Step 8: Step 9: • Intelligent Timeout Interval Based On Actual Charge Current Step 10: • Integrated Disconnect Switch to Disconnect the Battery • 30mV (target) Voltage Accuracy Step 11: • Programmable Charge Current • Programmable End-of-Charge Current • Charge Current Thermal Foldback for Thermal Protection Step 12: • Trickle Charge for Fully Discharged Batteries • 28V Maximum Voltage at VIN pin Step 13: • Power Presence and Charge Indications • Ambient Temperature Range: -40°C to +85°C • 3x3 10 Ld DFN Package 1 Step 14: Connect a 5V supply PS1 to VIN (J6, upper +) with the current limit set at 1A Connect a 3.8V supply PS2 to BAT output (J2, upper +) with the current limit set at 1A Connect a current meter to JP5 as shown in Figure 1 Connect the DC electronic load of 1.2A to BAT (J2, upper +) Insert a jumper shunt on JP6, all other jumper shunts are not installed Turn on Power Supplies and DC electronic load, adjust the power supply PS2 such that the voltmeter V2 reads 3.8V Both the red and the green LEDs should be on, indicating power on and charging condition The current meter I2 should read about 70mA as the charging current Insert a jumper shunt on JP3 and the current meter I2 should read about 150mA charging current Insert a jumper shunt on both JP2 and JP3, the current meter I2 should read about 220mA charging current Reduce the voltage at PS2 to 2.4V for trickle charge currents. The current reading should be 25mA Slowly reduce the E-Load1 current until the green LED turns off, the current meter I2 should read about 15mA EOC current Insert a jumper shunt on JP1 and repeat Step 12, the current meter I2 should read 30mA EOC current DPPM test. Set the current limit on the input supply to 1.5A. Increase E-Load2 output current until VOUT drops to VDPPM level of 4.3V due to input current limit of the ISL9301 and charging current to the battery will reduce; to allow more current to the output due to the DPPM function CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2007, 2008. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1338 I1 V1 V1 V2 V2 I2 I2 PS1 PS1 - + - + PS2 -- PS2 - + + E-LOAD2 E-Load2 - ++ -- + + E-Load1 E-LOAD1 FIGURE 1. CONNECTION OF EQUIPMENT Description of Jumper Settings JP1 - Parallels an additional 274k resistor to the IMIN pin (total RIMIN = 173k), such that the End-of-Charge Current will be increased to 30mA (RIMIN is 274k and the EOC current is 15mA without the shunt). JP2 - Parallels an additional 53.4k resistor to the IREF pin (total RIREF = 26.7k), such that the charge current will be increased to 0.15A (RIREF is 53.4k and the charge current is 70mA if the shunt on JP3 is removed). JP3 - Parallels an additional 53.4k resistor to the IREF pin (total RIREF = 26.7k), such that the charge current will be increased to 0.15A (RIREF is 53.4k and the charge current is 70mA if the shunts on both JP2 is removed). Shunts JP2 and JP3 are installed, such that two additional 53.4k resistor to IREF pin (total RIREF =17.8k), the charge current will be increased to 0.24A. JP5 - A shunt installed on JP5 connects the BAT pin to the output connector J2 if IBAT measurement is not needed. The shunt can be replaced by a current meter if charge current measurement is needed as shown in Figure 1. output current measurement is needed as shown in Figure 1. JP8 - A shunt installed on JP8 connects BATON pin to VBAT such that VOUT is connected to VBAT through an internal MOSFET when VIN is not applied. When VIN is applied, BATON pin has no impact on VOUT and VBAT. TABLE 1. JUMPER SETTING SUMMARY JUMPER POSITION FUNCTION JP1 Shunt installed Set EOC current to 30mA JP2 Shunt installed Sets charging current to 0.15A, if shunt on JP3 is not installed JP3 Shunt installed Sets charging current to 0.15A, if shunt on JP2 is not installed JP5 Shunt installed Connects BAT to J2 JP6 Shunt installed Connects VIN to J1 JP7 Shunt installed Connects VOUT to J3 Shunt installed Connects VOUT to VBAT when VIN is not applied. JP8 JP6 - A shunt installed on JP6 connects the VIN pin to the output connector J1 if output current measurement is not needed. The shunt can be replaced by a current meter if input current measurement is needed as shown in Figure 1. JP7 - A shunt installed on JP7 connects the VOUT pin to the output connector J3 if input current measurement is not needed. The shunt can be replaced by a current meter if 2 AN1338.1 March 31, 2008 Application Note 1338 Schematic D2 D1 C3 TP2 VBAT TP1 VIN JP6 TP6 TP7 CHG PPR JP5 2 1 TP11 C2 1 2 U1 VIN VOUT VBAT BATON PPR IREF CHG IMIN TIME GND 1 2 J2 TP5 VOUT C6 R1 1 2 2 1 J1 R2 C5 TIME ISL9301 C1 R3 JP7 TP8 BATON TP10 JP1 IMIN 2 R4 1 R6 R5 TP9 JP2 2 1 JP3 IREF 2 1 R7 R8 J3 C4 1 2 JP8 2 1 TP12 GND TP3 GND TP4 GND FIGURE 2. ISL9301EVAL1Z SCHEMATIC PCB Layout FIGURE 3. SILK LAYER 3 AN1338.1 March 31, 2008 Application Note 1338 PCB Layout (Continued) FIGURE 4. TOP LAYER FIGURE 5. BOTTOM LAYER 4 AN1338.1 March 31, 2008 Application Note 1338 ISL9301EVAL1Z Bill Of Materials ITEM QTY REFERENCE PART DESCRIPTION PCB FOOTPRINT 1 1 U1 ISL9301 Power Pather Charger 3x3 DFN 2 2 R1, R2 0805, 470, 5% Resistor 3 1 R3 4 1 5 1 6 PART NUMBER VENDOR ISL9301 Intersil 0805 ERJ-6GEYJ471V Panasonic 0402, 100k, 1% Resistor 0402 ERJ-2RKF1003X Panasonic R4 0402, 274k, 1% Resistor 0402 ERJ-2RKF2743X Panasonic R6 0402, 53.4k, 1% Resistor 0402 ERJ-2RKF5902X Panasonic 1 R5 0805, 274k, 1% Resistor 0805 ERJ-6ENF2743V Panasonic 7 2 R7, R8 0805, 53.4k, 1% Resistor 0805 ERJ-6ENF5902V Panasonic 8 1 C1 Panasonic 9 3 C3, C5, C6 10 2 C2, C4 11 3 J1, J2, J3 12 3 VIN, VOUT, VBAT 13 6 TIME, CHG, PPR, IREF, IMIN, BATON 14 4 GND 15 5 JP2, JP3, JP5, JP6, JP7, JP8 4.7µF, 35V, Tantalum 2512 ECS-T1VC475R 0.01µF, 50V, X7R Ceramic 0402 C0402C103K5RACTU Kemet 10µF, 6.3V, Tantalum 1206 ECS-T0JY106R Panasonic 2.54mm Center Header, 2ckt 22-11-2022 Molex Test point, Red 5010 Keystone Test point, Yellow 5014 Keystone Test point, Black 5011 Keystone 2.54mm header, 2ckt 22-28-4020 Molex 16 1 D2 Green LED 0805 SML-LXT0805GW-TR Lumex Opto 17 1 D1 Red LED 0805 SML-LXT0805IW-TR Lumex Opto 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 AN1338.1 March 31, 2008