Application Note 1415 ISL9221EVAL1Z Evaluation Board Application Manual Description Quick Setup Guide (Refer to Figure 1) The ISL9221EVAL1Z is an evaluation tool for the ISL9221 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. DO NOT APPLY POWER UNTIL STEP 6 For VDC Input: Step 1: Connect a 5V supply PS1 to VDC input (J1, upper +) with the current limit set at 1.3A Step 2: Connect a 3.5V supply PS3 to BAT output (J3, upper +) with the current limit set at 1.3A Step 3: Connect a current meter to JP8 as shown in Figure 1 Step 4: Connect the DC electronic load of 1.2A to BAT (J3, upper +) Step 5: Insert a jumper shunt on JP1, all other jumper shunts are not installed Step 6: Turn on Power Supplies and DC electronic load, adjust the power supply PS3 such that the voltmeter V2 reads 3.5V • Both Inputs Accept Voltage up to 28V Step 7: • Flexible Power Connectors Each with a Hook and a Solder Pad Providing Variety to Users 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 0.28A as the charging current Step 9: Insert a jumper shunt on JP6 and the current meter I2 should read about 0.55A charging current Step 10: Insert a jumper shunt on both JP6 and JP7, the current meter I2 should read about 1.0A charging current Step 11: Reduce the voltage at PS3 to 2.0V for trickle charge currents. Repeat steps 8, 9 and 10. The current reading should be 50mA, 100mA and 180mA for steps 8, 9 and 10, respectively Step 12: Slowly reduce the DC electronic load current until the green LED turns off, the current meter I2 should read about 55mA EOC current Step 13: Insert a jumper shunt on JP3 and repeat Step 12, the current meter I2 should read 75mA EOC current The ISL9221 is a dual input, fully integrated single-cell Li-ion battery charger. The ISL9221 charger accepts two input sources: one from a USB port and the other from a desktop cradle. Both inputs accept input voltages ranging from 4.5V up to 28V. Due to the high voltage capability, the components associated with the input supply on the evaluation board are good for a 28V supply. The ISL9221 adds an additional feature in providing a limited amount of current to system architecture while protecting the system from destructively high voltage. Key Features • A Complete Evaluation Platform for the ISL9221 Charger • USB Port On-Board Accepts Power Directly From USB Cable • Convenient Jumpers for Programming the Charge Current, Charge Mode and for Current Measurement • 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 • RoHS compliant What is Needed The following instruments will be needed to perform testing: • Power supplies: - PS1: DC 30V/2A - PS2: DC 10V/2A - PS3: DC 10V/2A • DC Electronic load: 20V/2A • Multimeters For USB Input: • Oscilloscope Step 1: Connect a 5V supply PS2 to USB with the current limit set at 0.7A. Step 2: Connect a 3.5V supply PS3 to BAT (J3 upper +) with the current limit set at 0.7A. • Cables and Wires November 7, 2013 AN1415.1 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2008, 2013. All Rights Reserved 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 1415 Step 3: Connect the DC electronic load of 0.6A to BAT (upper +). Step 9: Insert a jumper shunt on JP4. The current meter I2 should read about 0.232A charging current. Step 4: Connect a current meter to JP8 as shown in Figure 1. Step 10: Step 5: Insert a jumper on JP2, all other jumper shunts are not installed. Insert a jumper shunt on both JP4 and JP5. The current meter I2 should read about 0.35A charging current. Step 11: Reduce the voltage at PS3 to 2.0V for trickle charge current. Repeat step 9, 10, 11. The reading should be around 20mA, 42mA and 63mA for steps 9, 10 and 11, respectively. Step 12: Slowly reduce the electronic load current until the green LED turns off, the current meter I2 should read about 55mA EOC current. Step 13: Insert a jumper shunt on JP5 and repeat Step 10. The current meter I2 should read 75mA EOC current. Step 6: Turn on power supplies and DC electronic load and adjust the power supply PS3, such that the voltmeter V2 reads 3.5V. 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 0.116A charging current. I2 I1 PS1 PS3 - + + + - E-load PS2 - - + FIGURE 1. CONNECTION OF EQUIPTMENT 2 AN1415.1 November 7, 2013 Application Note 1415 Description of Jumper Settings JP1 - A shunt installed on JP1 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. JP2 - A shunt installed on JP2 connects the input source from the USB port connector to the USB pin if a USB port is used for the evaluation. JP3 - Parallels an additional 27.4k resistor to the IMIN pin (total RIMIN = 7.33k), such that the End-of-Charge Current will be increased to 75mA (RIMIN is 10k and the EOC current is 55mA without the shunt). JP4 - Parallels an additional 59k resistor to the IUSB pin (total RIVDC = 29.4k), such that the cradle charge current will be increased to 0.232A (RIUSB is 59k and the charge current is 0.115A if the shunts on both JP4 and JP5 are removed). JP5 - Parallels an additional 59k resistor to the IUSB pin (total RIUSB = 29.4k), such that the cradle charge current will be increased to 0.232A (RIUSB = 59k and the charge current is 0.115A if the shunts on both JP4 and JP5 are removed; RIUSB= 19.7k and the charge current is 350mA if the shunts on both JP4 and JP5 are installed). JP6 - Parallels an additional 24.9k resistor to the IIVDC pin (total RIVDC = 12.5k), such that the VDC charge current will be increased to 0.55A (RIVDC is 24.9k and the charge current is 0.28A if the shunts on both JP6 and JP7 are removed). JP7 - Parallels an additional 15k resistor to the IIVDC pin (total RIVDC = 9.36k), such that the VDC charge current will be increased to 0.73A (RIVDC = 24.9k and the charge current is 0.28A if the shunts on both JP6 and JP7 are removed; RIVDC= 6.8k and the charge current is 1A if the shunts on both JP6 and JP7 are installed.) TABLE 1. JUMPER SETTING SUMMARY JUMPER POSITION FUNCTION JP1 Shunt installed Connects input source at J1 to VDVC pin. JP2 Shunt installed Connects input source from USB port connector to VUSB pin. JP3 Shunt installed Sets VDC and USB EOC current to 75mA. JP4 Shunt installed Sets USB charge current to 0.232A if JP5 is not installed. JP5 Shunt installed Sets USB charge current to 0.232A if JP4 is not installed. JP6 Shunt installed Sets VDC charge current to 0.55A, if shunt on JP7 is not installed. JP7 Shunt installed Sets VDC charge current to 700mA if JP6 is not installed. JP8 Shunt installed Connects J3 to VBAT pin. JP9 Shunt installed Connects cathode of D3 to anodes of D4 and D5 to obtain zener voltage regulation if shunt on JP11 is not installed. JP10 Shunt installed 3-pin jumper. Installing shunt on the left 2 pins connects EN pin to HI. Installing shunt on the right 2 pins connecting EN pin to LOW. JP11 Shunt installed Connects cathodes of D1 and D2 to collector of Q1 to obtain voltage regulation circuitry (consisting of zener and bipolar transistor) if shunt on JP9 is not installed. JP8 - A shunt installed on JP6 connects the BAT pin to the output connector J3 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. JP9, JP11 - If Install shunt on JP9 and remove shunt on JP11, voltage at the anodes of D4 and D5 is 4.3V. If Install shunt on JP11 and remove shunt on JP9, voltage at the anodes of D4 and D5 is 3.5V JP10 - Connects the EN pin to a pull-up voltage or GND. The pull-up voltage is regulated 3.3V from the input source (either VDC or USB). If there is no shunt installed on JP3, 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, the charger is enabled, same as floating. If the shunt is installed across the two jumper pins labeled as “Disable”, the EN pin is driven to logic HIGH, which disables the charger. 3 AN1415.1 November 7, 2013 Application Note 1415 Board Design Schematic J1 1 2 C7 4 . 7 u F 35 V J P1 J2 1 2 D1 R2 JP 2 1 D2 C1 4 . 7 u F, 3 5V R1 4 9 .9 J P1 1 C2 0 .1 u F C3 0 .1 u F Q1 C4 0 .1 u F C 5 0 .1 u F C6 0 .1 u F 1 V DC _ BY P JP 9 D4 1 D5 U S B _B YP 4 .3 V U1 1 2 3 4 5 6 D3 R 3 470 R 4 470 J P1 0 VD C VU S B P PR CH G EN IM I N V DC _L D O V BA T U S B_ BY P IVD C G ND IUS B J P8 1 2 1 1 1 0 9 8 7 1 2 J P6 IS L 9 22 1 JP 4 JP 3 R7 59K R6 1 0K J P7 C9 10uF JP 5 R 10 2 4 .9 K R5 2 7 .4 K J3 R8 5 9K R 11 2 4 .9 K C1 0 47uF R 12 15K R 9 5 9K ISL9221EVAL1Z Bill of Materials ITEM QTY 1 1 U1 ISL9221 Charger DFN-12 ISL9221 Intersil 2 2 D1, D2 Switching diode, 100V, 250mA SOD-523 CMOD4448 Central Diodes 3 1 D4 Green LED 805 SML-LXT0805GW-TR Lumex 4 1 D5 Red LED 805 SML-LXT0805IW-TR Lumex 5 1 Q1 60V, 1A, NPN Transistor SOT-23 FMMT491TA Zetex 6 2 J1, J3 2.54mm Center Header, 2CKT 22-11-2022 Molex 7 1 J2 Type B, Female USB 787780-1 Amp/Tyco 8 9 JP1, JP2, JP3,JP4, JP5, 2.54mm Header, 2CKT 22-28-4020 Molex 22-28-4030 Molex 9 REFERENCE PART DESCRIPTION FOOTPRINT USB-TypeB PART NUMBER VENDOR JP6, JP7, JP8, JP9, JP11 10 1 JP10 2.54mm Header, 3CKT 11 3 C2, C3, C4 0.1µF, 50V, X7R Ceramic 402 TDK 12 2 C5, C6 0.1µF, 50V, X7R Ceramic 805 Panasonic 13 1 C9 10µF, 6.3V Tantalum 1206 Panasonic 14 1 R5 27.4k, 1% SMD resistor 805 Panasonic 15 1 R6 10k, 1% SMD resistor 402 Panasonic 16 2 R11, R12 24.9k, 1% SMD resistor 805 Panasonic 17 1 R10 24.9k, 1% SMD resistor 402 Panasonic 18 1 R1 3.3k, 5% SMD resistor 805 Panasonic 19 1 D3 4.3V, 200mA SOD-323 20 1 C7 4.7µF 35V 2512 Panasonic 21 1 C1 4.7µF, 35V 2512 Panasonic 22 2 R3, R4 470 805 Panasonic 23 1 C10 47µF, 6.3V, X5R, Ceramic 1210 Panasonic 4 MMSZ5229BS Diodes AN1415.1 November 7, 2013 Application Note 1415 ISL9221EVAL1Z Bill of Materials ITEM QTY 24 1 C20 Open 1205 25 1 R2 1, 5% SMD resistor 805 Panasonic 26 1 R7 59k, 1% SMD resistor 402 Panasonic 27 2 R8, R9 59k, 1% SMD resistor 805 Panasonic 28 3 VDC, VUSB, VBAT Test point, Red 5010 Keystone 29 7 PPR, CHG, Enable, IUSB Test point, Yellow 5014 Keystone 30 31 REFERENCE (Continued) PART DESCRIPTION FOOTPRINT PART NUMBER IVDC, VDC_BYP, USB_BYP 4 GND VENDOR Keystone Test point, Black 5011 Keystone PCB Layout FIGURE 1. SILK LAYER 5 AN1415.1 November 7, 2013 Application Note 1415 PCB Layout (Continued) FIGURE 2. TOP LAYER FIGURE 3. BOTTOM LAYER = 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 6 AN1415.1 November 7, 2013