ISL6292EVAL1Z Evaluation Board ® Application Note January 26, 2007 AN1060.1 Description Features The ISL6292EVAL1Z is a complete platform for the evaluation on all datasheet specifications and functionalities. 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. The ISL6292EVAL1Z board is intended to provide an evaluation platform for the 3x3mm2 DFN ISL6292 package, the single-cell Li-ion battery charger. • Different jumpers for input source selection, USB mode selection, and the convenience of current measurement. • Several 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 3.5x2.5 square inches for the convenience of evaluation. Assembled in the center square, the components constitute a complete charger solution, demonstrating the space saving advantage of the ISL6292 in limited space applications. • Eight thermal vias in the thermal pad simulating the customers’ thermal enhanced environment. LEDs connected to STATUS and FAULT pins will indicate the normal charging status or fault condition. What Is Inside On board jumpers and a DIP switch accomodate different operating conditions for the charger. • ISL6292EVAL1Z board Pinout • This ISL6292EVAL1Z Application Note ISL6292 (3X3 DFN) TOP VIEW • Pb-free plus anneal available (RoHS compliant) The Evaluation Kit contains: • The ISL6292 Data Sheet • Errata (for preliminary reference only) What Is Needed VIN 1 10 VBAT FAULT 2 9 TEMP STATUS 3 8 IREF TIME 4 7 V298 GND 5 6 EN The following instruments will be needed to perform testing: • Power supplies: 1. PS1: DC 20V/5A, 2. PS2: DC (sinks current) 20V/5A, such as Agilent 6654A • Electronic load: 20V/5A • Multimeters • Function generator Ordering Information • Oscilloscope PART # DESCRIPTION • Cables and wires ISL6292EVAL1Z Evaluation Board for the 3x3 DFN Package Part 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. 2003, 2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1060 Quick Setup Guide Step 1: TABLE 2. JUMPER SETTINGS Switch on bit 4 and bit 7 of the Dip-switch. Leave all other bits off, see Figure 1 JUMPER JP1 DO NOT APPLY POWER UNTIL STEP 6 JP2 POSITION FUNCTION USB TO VIN USB connection WALL CUBE TO VIN Wall adapter connection Installed Connect VBAT pin to battery current meter can replace shunt not installed Default installed Battery attached to Thermistor at J2 Step 2: Connect 5V on VIN. Step 3: Connect 3.7V on VBAT. Step 4: Connect 1.2A electronic load on VBAT. Step 5: Verify that no shunts across all jumpers. Step 6: Turn on Power Supplies and electronic load. Step 7: Green LED should be on, indicating normal charging operation. Initial Board Jumper Positioning (Refer to Figure 3) Step 8: If current meter is in series with VIN, it shall read 1A as the charging current. 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. JP3 IREF and V2P8 USB 500mA JP4 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. . ON OFF 1 2 3 4 5 6 7 8 9 FIGURE 1. INITIAL DIP SWITCH SETTINGS TABLE 1. DIP SWITCH PIN DESCRIPTIONS BIT DESCRIPTION 1 Adjustable TIMEOUT ON OFF 5 hours 50 mins REMARK 3 hours 30 mins 2 not connected 3 Charger enable/disable charger disabled charger enabled 4 IREF setting 1 Add 0.5A 5 IREF setting 2 Add 1A ICHG = 0.5A When both off 6 IREF and GND USB 100mA 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 need to be turned all off. JP4 - Selects USB modes: a shunt across IREF and V2P8 will set USB 500mA 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. not connected 7 TEMP normal normal 8 TEMP high too hot 9 TEMP low too cold All off simulates battery removal 2 AN1060.1 January 26, 2007 Application Note 1060 FIGURE 2. CONNECTION OF INSTRUMENTS 3 AN1060.1 January 26, 2007 Board Layout Information Schematic of PCB Board 4 Application Note 1060 AN1060.1 January 26, 2007 FIGURE 3. BOARD LAYOUT INFORMATION SCHEMATIC Application Note 1060 Bill Of Materials BOM FOR ISL6292EVAL1Z ITEM QUANTITY REFERENCE PCB FOOTPRINT PART NUMBER VENDOR 1 1 C1 1μF/10V, X5R Ceramic Cap 0603 C1608X5R1A105K TDK 2 1 C2 10μF/6.3V Tantalum Cap 2.05X1.3X1.2 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 0402 C1005X7R1C103K TDK 6 1 C6 10μF/16V, Tantalum Cap 3.2X1.6X1.6 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% 0402 Various 11 1 R4 160k, 1% 0402 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, 2ckt (R/A) A23879-ND DigiKey 18 1 J2 2.54mm Male Header, 3ckt (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, 2ckt 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 ISL6292 Intersil 24 6 VIN, VBAT, TIME, GND1, GND2, GND3 5002K-ND DigiKey 5 PART DESCRIPTION Single-Cell Li-ion Battery Charger Test Point 10-pin, 3X3 DFN AN1060.1 January 26, 2007 Application Note 1060 PCB Layout FIGURE 4. SILK LAYER FIGURE 5. TOP (LAYER 1, SIGNAL) FIGURE 6. INTERNAL (LAYER 2, GND) FIGURE 7. INTERNAL (LAYER 3, FLOATING FIGURE 8. BOTTOM (LAYER 4, GND) 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 AN1060.1 January 26, 2007