ISL6294AEVAL1Z Evaluation Board Application Manual ® Application Note May 5, 2009 AN1457.0 Description Features The ISL6294AEVAL1Z is an evaluation tool for the ISL6294A single-cell Li-ion battery charger. The evaluation tool provides a complete evaluation platform addressing all data sheet 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. • A Complete Evaluation Platform for the ISL6294A Charger The ISL6294A is a fully integrated single-cell Li-ion battery charger. The ISL6294A accepts input voltages ranging from 4.5V up to 28V. Due to the high voltage capability, the components associated with the cradle input circuit on the evaluation board are good for a 28V supply. • Convenient Jumpers for Programming the Charge Current, Charge Mode, and for Current Measurement The components assembled in the center square constitute a complete charger, indicating the space saving advantage of the typical ISL6294A installation in space-limited applications. ISL6294AEVAL1Z • Cradle Input Accepts Voltage up to 28V • Flexible Power Connectors Each with a Hook and a Solder Pad Providing Variety to Users • 3.5x2.5 Square Inches Board Size Handy for Evaluation • Thermal Vias in the Thermal Pad Similar To Customers’ Thermally Enhanced Environment • On-Board LEDs for Input PPR and CHG State Indication What is Needed The following instruments will be needed to perform testing: Ordering Information PART NUMBER • The Center Square Suggesting the Space Saving Advantage of the Typical Components Assembly DESCRIPTION Evaluation Board for ISL6294A • Power supplies: 1) PS1: DC 30V/2A 2) PS2: DC 10V/2A 3) PS3: DC 10V/2A • DC Electronic load: 20V/2A • Multimeters Pinout • Function generator ISL6294A (8 LD DFN) TOP VIEW • Oscilloscope • Cables and wires VIN 1 8 BAT PPR 2 7 IREF CHG 3 6 IMIN EN 4 5 GND 1 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. 2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1457 FIGURE 1. CONNECTION OF TEST INSTRUMENTS Quick Setup Guide (Refer to Figure 1) DO NOT APPLY POWER UNTIL STEP 5 For Cradle Input Step 1: Connect a 5V supply PS1 to CRDL input (J1, upper +) with the current limit set at 1.3A Step 2: Connect a 3.7V supply PS3 to BAT output (J2, upper +) with the current limit set at 1.3A Step 3: Connect a current meter to JP6, as shown in Figure 1 Step 4: Connect the DC electronic load of 1.2A to BAT (J2, upper +) Step 5: Insert a jumper shunt on JP2, JP3, JP4 and JP5, all other jumpershunts are not installed Step 6: Turn on Power Supplies and DC electronic load; adjust the power supply PS3 such that the voltmeter V2 reads 3.7V Step 7: Both the red and the green LEDs should be on, indicating power on and charging condition Step 8: The current meter I2 should read about 0.6A as the charging current 2 Step 9: Insert a jumper shunt on JP7 and the current meter I2 should read about 1.2A charging current Step 10: Remove the jumper shunt on JP3 and apply a 3.3V supply, positive to Pin 1 (at the right) of JP3, negative to GND Step 11: Slowly reduce the DC electronic load current until the green LED turns off; the current meter I2 should read about 50mA EOC current AN1457.0 May 5, 2009 Application Note 1457 Description of Jumper Settings JP1 - Connects the EN pin to a pull-up voltage or GND. The pull-up voltage is either the BAT voltage (when a shunt is installed on JP3) or an external 3.3V power source (when the shunt on JP3 is removed and a +3.3V supply is connected to pin 1(at the right) of JP3). If there is no shunt installed on JP1, the EN pin is internally pulled down to logic LOW, which enables the charger. If a shunt is installed across the two jumper pins labeled as “Enable”, the EN pin is driven to logic LOW and the charger is enabled, same as floating. If the shunt is installed across the two jumper pins labeled as “Disable” and the pull-up voltage is above 2V, the EN pin is driven to logic HIGH, which disables the charger. JP4 - Connect a 243k resistor from IMIN pin to GND for 50mA EOC current. JP5 - Connect a 20k resistor from IREF to GND for 0.6A charge current. JP6 - A shunt installed on JP6 connects the BAT pin to the output connector J2 if output current measurement is not needed. The shunt can be replaced by a current meter if output current measurement is needed as shown in Figure 1. JP7 - Parallels an additional 20k resistor to the IREF pin (total RICDL = 10k), the charge current will be increased to 1.2A. TABLE 1. JUMPER SETTING SUMMARY JP2 - A shunt installed on JP2 connects the input source from connector J1 to the circuit if input 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. JP3 - Selects the power source for logic pull-up and the LED supply. If a shunt is installed, the BAT voltage is selected as the power source. If the shunt is removed, an external power supply of +3.3V can be connected from Pin 1 (at the right) to GND to provide the pull-up and LED supply power. The purpose is to exclude the extra current through the charger when characterizing small currents, such as EOC and quiescent currents. JUMPER JP1 FUNCTION Shunt on Disable Charger disabled Shunt on Enable Charger enabled Shunt not installed Charger enabled Shunt installed Connects input source at J1 to VIN pin JP3 Shunt installed Select BAT as the pull-up source JP4 Shunt installed Sets EOC current to 50mA Shunt installed Sets charging current to 0.6A, if shunt on JP7 is not installed Shunt installed Connects BAT to J2 Shunt installed Sets charging current to 1.2A, if shunt on JP5 is also installed JP2 JP5 JP6 JP7 3 POSITION AN1457.0 May 5, 2009 Application Note 1457 Board Design Schematic FIGURE 2. SCHEMATIC 4 AN1457.0 May 5, 2009 Application Note 1457 TABLE 2. ISL6294AEVAL1Z BILL OF MATERIALS ITEM QTY REFERENCE PART DESCRIPTION 1 1 U1 2 2 R1, R2 470Ω, 5%, 1/8W Resistor 5 1 R5 6 2 R6, R7 7 1 8 ISL6294A Charger PCB FOOTPRINT 2x3 DFN PART NUMBER VENDOR ISL6294A Intersil 0805 ERJ-6GEYJ471V Panasonic 243k, 1%, 1/8W Resistor 0805 ERJ-6ENF2433V Panasonic 20k, 1% 1/8W Resistor 0805 ERJ-6ENF2002V Panasonic C1 4.7µF, 35V, Tantalum 6032 ECS-T1VC475R Panasonic 1 C2 0.1µF, 50V, X7R Ceramic 0603 C1608X7R1H104K TDK 9 1 C3 10µF, 6.3V, Tantalum 0603 ECS-T0JY106R Panasonic 10 2 C4, C8 1.0µF, 6.3V, X5R Ceramic 0603 ECJ-1VB0J105K Panasonic 11 1 C6 47µF, 6.3V, X5R Ceramic 1210 ECJ-4YB0J476M Panasonic 12 2 J1, J2 2.54mm Center Header, 2 CKT 22-11-2022 Molex 13 2 CRDL, VBAT Test point, Red 5010 Keystone 14 5 5014 Keystone 15 4 GND1, GND2, GND3, GND4 Test point, Black 5011 Keystone 16 6 JP2, JP3, JP4, JP5, JP6, JP7 2.54mm header, 2ckt 22-28-4020 Molex 17 1 JP1 2.54mm header, 3ckt 22-28-4030 Molex 18 1 D1 Green LED 0805 SML-LXT0805GW-TR Lumex Opto 19 1 D2 Red LED 0805 SML-LXT0805IW-TR Lumex Opto EN, CHG, PPR, IMIN, ICDL Test point, Yellow 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 AN1457.0 May 5, 2009