ISL6298EVAL1 Evaluation Board Application Manual ® Application Note February 9, 2005 AN1171.0 Description Features The ISL6298EVAL1 provides a complete platform for the evaluation of the ISL6298-2CR3. The on-board 9-bit DIP switch facilitates programming charging current, setting EN input, temperature monitoring status, and so on. The four jumpers can set up input source selection, USB mode selection, and can be used to make other necessary connections. • 9-bit DIP switch for conveniently setting up charging current, battery thermal status, EN input, and so on Assembled in the center square, the components constitute a complete charger solution, demonstrating the space saving advantage of the ISL6298 in limited space applications. LEDs connected to FAULT and STATUS pins will indicate the normal charging status or fault condition. On-board jumpers and a DIP switch accommodate different operation conditions for the charger. Ordering Information PART NUMBER ISL6298EVAL1 DESCRIPTION Evaluation Board for ISL6298-2CR3 1 • Different jumpers for input source selection, USB mode selection, and the convenience of current measurement • Exposed soldering pads connected to STATUS, FAULT, TIME, EN, V2P8 and TEMP functional pins to accommodate experimental testing that need extra connections to those pins • Board size 3.5 x 2.5 square inches for the convenience of evaluation • Eight thermal vias in the thermal pad simulating the customers’ thermally enhanced environment Pinout ISL6298 3X3 DFN TOP VIEW VIN 1 10 VBAT FAULT 2 9 TEMP STATUS 3 8 IREF TIME 4 7 V2P8 GND 5 6 EN CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1171 What is inside . TABLE 1. DIP SWITCH PIN DESCRIPTIONS Bit The Evaluation Kit contains: • ISL6298EVAL1 board 1 • The ISL6298 Data Sheet Description Adjustable TIMEOUT ON OFF 5 hours 50 mins 3 hours 30 mins Charger charger enable/disable disabled charger enabled 2 • This ISL6298EVAL1 Application Note 3 What is needed 4 The following instruments will be needed to perform testing: 5 • Power supplies: 1.PS1: DC 20V/5A, 6 2.PS2: DC (sinks current) 20V/5A, such as Agilent 6654A Remark not connected IREF setting 1 Add 125mA I CHG=125mA IREF setting 2 Add 250mA When both off not connected 7 TEMP normal normal 8 TEMP high too hot 9 TEMP low too cold All off simulates battery removal • Electronic load: 20V/5A TABLE 2. JUMPER SETTINGS • Multimeters JUMPER • Function generator • Oscilloscope Step 1: Switch on bit 4 and bit 7 of the Dip-switch. Leave all other bits off, (See Figure 1.) JP1 WALL CUBE TO VIN Wall adapter connection JP2 Installed Connect 5V on VIN. Step 2: Connect 3.7V on VBAT. Step 3: Connect 500mA electronic load on VBAT. Step 4: Verify that no shunts across all jumpers. Step 5: Turn on Power Supplies and electronic load. Step 6: Green LED should be on, indicating normal charging operation. Step 7: If current meter is in series with VIN, it shall read 250mA as the charging current. ON OFF 2 3 4 5 6 7 8 9 FIGURE 1. INITIAL DIP SWITCH SETTINGS DIP Switch Settings A 9-bit DIP switch is provided to set up voltage, current reference, end-of-charge (EOC) current, and so on. The functionality of the bits are described in Table 1. 2 JP3 installed connect VBAT pin to battery current meter can replace shunt default Battery attached to Thermistor at J2 IREF and V2P8 USB 255mA IREF and GND USB 100mA Initial Board Jumper Positioning (Refer to Figure 3) Step 1: 1 not installed JP4 DO NOT APPLY POWER UNTIL STEP 6 FUNCTION USB connection • Cables and wires Quick Setup Guide POSITION USB TO VIN JP1 - Selects the VIN pin to be connected to either wall adapter, or to USB connector. If J1 connector is being used, a shunt must be installed across ‘WALL CUBE TO VIN’, or if J3 (USB) connector is being used a shunt must be installed across ‘USB TO VIN’. J1, J3 and JP1 can be ignored if power supply is connected directly to VIN test point, which is directly connected to VIN pin of the IC. A current meter can replace the shunt mentioned above, so as to measure the input current. JP2 - Can connect the VBAT pin to the battery. If the J2 connector is being used, a shunt must be installed across JP2. In this case, a current meter can also replace the shunt to measure the VBAT current. JP3 - Can connect the TEMP pin to the battery. Usually no shunt is needed for JP3, as the Eval board can simulate various battery thermal conditions. Only when a battery attached with a thermistor is applied on J2 does it become necessary to install a shunt across JP3, and at the same time bit 7, 8, 9 on the DIP switch all need to be turned off. JP4 - Selects USB modes: a shunt across IREF and V2P8 will set USB 250mA mode, a shunt across IREF and GND will set USB 100mA mode. When the charge current is programmed by the resistors connected to IREF pin, no shunt should be installed on JP4. AN1171.0 February 9, 2005 Application Note 1171 FIGURE 2. CONNECTION OF INSTRUMENTS 3 AN1171.0 February 9, 2005 Board Information Schematics 4 Application Note 1171 AN1171.0 February 9, 2005 FIGURE 3. BOARD LAYOUT INFORMATION SCHEMATIC Application Note 1171 TABLE 3. ISL6298EVAL1 BILL OF MATERIALS ITEM QTY REFERENCE PART DESCRIPTION 1 1 C1 1µF, 6.3V, X5R ceramic cap 0603 0603X105K6R3 Walsin 2 1 C2 10µF/6.3V, Tantalum Cap 2.05 x 1.3 x 1.2 TAJR106M006 AVX 3 1 C3 15nF/16V, X7R ceramic cap 0402 C1005X7R1C153K TDK 4 1 C4 0.1µF/16V, Y5V ceramic cap 0402 C1005Y5V1C104ZT TDK 5 1 C5 10nF/16V, X7R Ceramic cap 0805 C1005X7R1C103K TDK 6 1 C6 10µF/16V, Tantalum Cap 3.2 x 1.6 x 1.6 TAJA106M016 AVX 7 1 D1 Green LED 0805 67-1553-1-ND DigiKey 8 1 D2 Red LED 0805 67-1552-1-ND DigiKey 9 2 R1, R2 1K, 5% 0603 Various 10 1 R3 10K, 1% 0603 Various 11 1 R4 160K, 1% 0603 Various 12 1 R6 160K, 1% 0805 Various 13 1 R7 80K, 1% 0805 Various 14 1 R9 5K, 1% 0805 Various 15 1 R10 500, 1% 0805 Various 16 1 R11 18K, 1% 0805 Various 17 1 J1 2.54mm Male Header, 2 ckt (R/A) A23879-ND DigiKey 18 1 J2 2.54mm Male Header, 3 ckt (R/A) A23880-ND DigiKey 19 2 JP1, JP4 2.54mm Male Header, 3ckt WM6403-nd DigiKey 20 2 JP2, JP3 2.54mm Male Header, 2 ckt WM6402-nd DigiKey 21 1 J3 USB receptacle, B type 787780-1-ND DigiKey 22 1 SW1 DIP Switch, 9 Pos, SMT CKN1323-ND DigiKey 23 1 U1 ISL6298 Intersil 24 6 VIN, VBAT, TIME, GND1, GND2, GND3 5002K-ND DigiKey Single-Cell Li-ion Battery Charger Test Point PCB FOOTPRINT 10-pin, 3X3 DFN PART NUMBER VENDOR PCB Layout SILK SCREEN LAYER 5 INTERNAL (LAYER 2, GND) AN1171.0 February 9, 2005 Application Note 1171 PCB Layout (Continued) BOTTOM (LAYER 4, GND) TOP (LAYER 1, SIGNAL) INTERNAL (LAYER 3, FLOATING) 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 AN1171.0 February 9, 2005