ISL6295EVAL1 Fuel Gauge IC Evaluation Kit ® Application Note January 4, 2007 AN1174.1 Description Features The ISL6295EVAL1 is an evaluation tool for the ISL6295 low voltage fuel gauge IC. The evaluation tool provides a complete evaluation platform addressing all datasheet specifications and functionalities. The complete evaluation kit includes the ISL6295EVAL1 evaluation board, the DeVaSys USB-I2C interface board, the interconnection cables, the PC base host software CD and manual. • A Complete Evaluation Platform for the ISL6295 Fuel Gauge IC The ISL6295EVAL1 evaluation board incorporates a typical Li-Ion battery pack protection circuit including a safety IC and a dual MOSFET. The circuit also includes a precision sense resistor for the charge and discharge current measurements. An industry standard 10kΩ at +25°C negative temperature coefficient (NTC) device (Semitec 103AT type) is provided for external temperature measurement. Friction-lock headers (Molex KK, 0.1” pin spacing) are provided for a easy connection on bench. Test points for all pins of the ISL6295 fuel gauge IC are provided with insert tips for convenient scope probing. The ISL6295 is a highly integrated fuel gauge solution for single-cell Li-ion batteries. The IC communicates to the host via the industry standard I2C/SMBus port. While the evaluation software is designed for use with a MS Windows PC platform, it can easily be ported to run on other hardware and OS platforms such as Windows CE or Linux. • Easy to Use GUI Based Software Demonstrates Capabilities of the ISL6295 Device • On-Board Precision Current Sense Resistor • Flexible Power Connectors for Source and Load Connections • Convenient Test Points for Easy Scope Measurements • 2.5x1.75 Square Inches Board Size Handy for Evaluation • USB Interface to the Host PC via the I2C to USB adapter Module • Includes a Protection Circuit which fully Complies with the Li-Ion Battery Safety Requirements • Fully Calibrated for the Best Accuracy What is Included The following items are included in the ISL6295EVAL1: • ISL6295EVAL1 Evaluation Module • DeVaSys USB-I2C Interface Card • USB Cable • Semitec 103AT Type Thermistor Ordering Information PART # • I2C Wire Harness DESCRIPTION ISL6295EVAL1 Complete Evaluation Kit for ISL6295 IC Pinout • Host Driver Installer CDROM • Application Manual What Else is Needed The following instruments will be needed to set up and perform the evaluation: ISL6295 (TSSOP) TOP VIEW GPAD 1 8 SR VP 2 7 GND SCL 3 6 NTC/IO SDA 4 5 ROSC • PC - Pentium II or higher - Windows 98, Windows 2000 or NT, Windows XP operation system - Minimum 128MB RAM - Minimum 1GB hard disk - USB port • A DC power Supply with Adjustable Voltage up to 5V and 2A Current Capability, or a Single Cell Li-Ion Battery • DC Electronic Load: 20V/2A • Multimeters • Oscilloscope • Cables and Wires 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. 2005, 2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1174 Software Setup - BatteryBench 2.2 Hardware Setup Step 1: Insert the installation CD in the host PC. Step 1: Step 2: If you have disabled the CD Autoplay feature, you can run the setup program manually by selecting the Start menu, choosing Run and typing D:\setup.exe (replace D with whatever is appropriate for your CD-ROM drive). Connect a fully charged single cell Li-Ion battery or a DC power supply with output set at 4V to the ISL6295EVAL1 connector J3. Step 2: Connect the I2C wire harness (provided) between J4 of the I2C Interface card and J2 of the ISL6295EVAL1 as shown in Figure 1. Step 3: Launch BatteryBench 2.2. Make sure the “Device Serial ID” window at the top of the page shows the ID number of the interface card. Follow the Voltage Measurement procedure in next section to check the pack voltage A/D result. If the result matches the reading of the voltmeter V1, the setup is correct. Step 4: Install a jumper shunt on JP1, then remove before proceeding. This step will allow the protection IC MM3077 to exit its power down mode, and is necessary to enable the discharge current path. Step 5: Connect the ammeter IL and the E-load between B+ and B- pins of J1 as shown in Figure 1. Set the E-load to sink 1.0A current. Follow the Current Measurement procedure in next section to check the current A/D result. The result should be a negative number, indicating a discharge current. Step 3: Follow the on-screen instructions to complete the installation. Software Setup - DeVaSys USB-I2C/IO Driver Step 1: Plug the USB-I2C/IO board into your computer, using the provided USB cable. Step 2: Your computer should detect the new hardware and prompt you for the location of the device driver. Step 3: Direct the installation dialogs to look in the CDROM for the device driver. Step 4: The new hardware wizard should complete and both the RED and GREEN LEDs on the USBI2C/IO board should light. Host PC ISL6295EVAL1 USB Cable IL - PS1 + I2C I2C Bus + I2C Interface Card I2C - E-load FIGURE 1. CONNECTION OF INSTRUMENTS 2 AN1174.1 January 4, 2007 Application Note 1174 Evaluation Procedures The following section describes the configuration and operation of the eval kit. Follow the “Software Setup” section to install the BatteryBench software in your PC. Follow the “Hardware Setup” section to connect the ISL6295EVAL1 evaluation kit. Hardware Configuration There are 4 jumper headers on the ISL6295EVAL1 evaluation board. The jumper settings are described as follows: JP1 - Insert a jumper shunt on JP1 to bypass the protection FETs in case the evaluation is done with a DC source instead of a battery and you would like to evaluate beyond the 4.3V OVP limit. Note for safety reason the protection FETs must not be bypassed if a battery is used for the evaluation. Severe injury may result if the battery is over charged. JP2 - Insert a jumper shunt on JP2 to connect the NTC pin to ground if not used. TABLE 1. ELECTRICAL SPECIFICATIONS PARAMETERS OPERATING RANGE UNITS Charge/Discharge Current 2.5 A (VB+) - (VB-) 2.8 to 4.3 V 2.8 to 7.0 (Jumper shunt on JP1) V 2.8 to 4.3 V 2.8 to 7.0 (jumper shunt on JP1) V GPAD Voltage 0 to 6.2 V NTC Resistor Value 0 to 22 kΩ Ambient temp -20 to +85 °C (Vcell+) - (Vcell-) Software Configuration After the BatteryBench 2.2 program is launched, the default tab is the A/D Controls/Results Registers. There are five tabs in the main program window. Each of these functional pages can be entered by left clicking the appropriate tab. Detailed description of each functional page will be provided in the following sections. JP3 - Insert a jumper shunt on JP3 to connect the GPAD pin to ground if not used. A/D Controls/Results Registers Tab JP4 - JP4 provides connection of an ammeter for the current flowing in or out of the B+ terminal. Insert a jumper shunt on JP4 if an ammeter is not connected. The A/D Controls/results Registers tab allows the user to configure the A/D converter, read the latest real-time measurement of charge/discharge current, pack voltage and temperature. The evaluation procedure is as follows: There are 8 on-board test pins, TP1 to TP8, correspond to the IC pin numbers of the ISL6295 for convenient probing. 1. Click the “Load Default Configs” button to load the default settings into the ISL6295 A/D control registers. Connector J1 is for the pack connections including B+, B-, NTC, GPAD and GND. Connector J2 is for the I2C communication (wire harness provided). Connector J3 is for the cell connection. Each pin of the connectors are clearly marked on the board, please use precaution when making the connections. 2. The default settings are 15-bit resolution. All input sources except the external temperature sensor are enabled. Make changes if necessary before proceeding. Click the “Update” and “Read” buttons for the changes to take effect. Use 22 AWG wire, as short as possible for connection from J3 to the cell to minimize the IR drop on the wire, which may cause significant error for the battery voltage measurement. Also use 22 AWG wire for connection from B+ and B- to the load. The electrical specifications of the parameters most relevant to the evaluation kit is provided in Table 1. Refer to the ISL6295 datasheet for the complete specifications of the fuel gauge IC. 3. The default data format is Calculated and Compensated in decimal numbers. This means the raw data has been processed to convert to real-life units, i.e. mA for current, mV for voltage, etc. The “Compensated” check box indicates that the calibration factors are included in the calculations. If you would like to display the raw data, which is the number of LSB counts from the A/D, check the “Raw” radio button in the “Display Settings” area. 4. To view the results continuously, check the “Loop” box at the bottom of the page and click the “Reading A/D Values” button. The results will be refreshed at a rated specified by the “Sample Div.” window on the “System Configuration” area. The upper portion of this page provides System Configuration evaluation. The system control includes the General Purpose Input/Output (GPIO) and the Operation Mode Control (OPmode) evaluation. The “Sample Div.” drop down box allows the user to change the A/D conversion interval if the sample mode is selected by checking the “SAMP” box. 3 AN1174.1 January 4, 2007 Application Note 1174 Current Measurement The evaluation board includes the Li-Ion protection circuit implemented with a protection IC and a dual MOSFET. Since the OVP threshold of the protection IC is set at 4.3V, when a power supply is used, the voltage must be below the OVP threshold to turn on the charge MOSFET. An electronic load or a power resistor is used to force a current through the sense resistor. The full scale dynamic range at the SR pin is ±152mV, thus the maximum measurable current is 7.6A if permitted by thermal constraints. the enable box for “Current”. Specify the A/D conversion resolution, click “Update” and then “Read.” The current value will be displayed on the “Results” area. A negative value indicates a discharge current while a positive value indicates a charge current condition. Since 170mV is used as the reference voltage, if 15-bit resolution is selected for the A/D convention, the LSB in units of current is: 170mV Current LSB = -------------------------------- = 259.5μA 15 2 × 20mΩ To request the charge and discharge current measurements, the A/D control register Ictrl must be enabled by checking 4 AN1174.1 January 4, 2007 Application Note 1174 Voltage Measurement The voltage measurement can be evaluated at the pack voltage and the GPAD voltage. Since the max input range of the A/D converter is 340mV, an internal voltage divider is provided to support up to 7V pack voltage measurement. To request the pack voltage measurement, the A/D control register VPctrl must be enabled by checking the enable box for “VPack Volt”. Specify the A/D conversion resolution, click “Update” and then “Read”. The Pack voltage value will be displayed on the “Results” area. Taking into account the internal voltage divider, the LSB value in a pack voltage measurement using the 340mV reference voltage is given by the following equation: 10.2V VPack LSB = ---------------- = 311.3μV 15 2 340mV. Exceeding this dynamic range will result in an inaccurate temperature measurement. Hence it is important to choose a thermistor value such that the voltage does not exceed 340mV over the entire temperature range of interest. If the thermistor resistor value exceeds 340mV at low temperatures, a shunt resistor method, where a fixed resistor is placed in parallel with the thermistor, can be used. The parallel resistor reduces the overall resistance, particularly at the lower temperature range. Figure 2 shows the dynamic ranges of the Semitec 103AT thermistor with and without the 24.9kΩ parallel resistor at minimum and maximum NTC source current. Without the parallel resistor, the NTC voltage will exceed 340mV at around +5°C at 16μA. With the parallel resistor the NTC voltage is below 340mV for down to -30°C at 16μA. 0.35 The GPAD voltage measurement supports up to 6.2V. The 15-bit LSB value is: 103AT at 16µA 0.30 6.2V GPAD LSB = ------------ = 189.2μV 15 2 Internal Temperature Measurement Temperature measurement using the internal temperature sensor can be performed by checking the enable box for “Int. Temp.” Specify the A/D conversion resolution, click “Update” and then “Read.” The internal temperature value will be displayed on the “Results” area. The temperature measurement using the internal temperature sensor is derived using the following equation: ITres – 22761 Internal Temp = -------------------------------------76.3 ( °C ) Where ITres is the number of the A/D LSB counts at a 15-bit resolution. The ITres value can be requested by choosing “Raw” on the Display Settings area. External Temperature Measurement The NTC connection is provided at Pin 2 of the connector header J1. When the NTC function is enabled, the ISL6295 will source a 12.5μA current thru the NTC pin to the thermistor. To minimize power consumption, the reference output current from the NTC pin is not constantly ON, but periodically enabled when sampling is needed. Since a thermistor has a negative temperature coefficient, the ISL6295 features an internal voltage inverter to translate the NTC voltage to a PTC voltage so that a larger A/D conversion result would correspond to a higher temperature reading. The actual voltage presented at the ADC input is: V ADC = V REF – V NTC 0.20Vntc (mV) 0.25 0.20 103AT at 8µA 103AT//24.9k at 16µA 0.15 0.10 0.05 103AT//24.9k at 8µA 0.00 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 TEMPERATURE (°C) 90 FIGURE 2. EXT TEMP MEASUREMENT WITH 103AT THERMISTOR AND PARALLEL RESISTOR For temperature measurement using the external thermistor, check the enable box for “Ext. Temp.” Specify the A/D conversion resolution, click “Update” and then “Read.” The external temperature value will be displayed on the “Results” area. For your convenience a Semitec 103AT thermistor is included in the evaluation kit. A look-up table is also provided for the 103AT thermistor and is located in C:\Program Files\Intersil Corp\ISL6295\ntclut.def. The table can be modified if needed using MS Word program. The table format is a single column of 10 entries. These entries list the thermistor resistance values correspond to a temperature range of -20°C to +70°C with a +10°C increment. The first entry is for -20°C and the last entry is for +70°C. If a parallel resistor is used, the entries should list the combined resistance of the thermistor and the resistor. The reference voltage is 340mV for the external temperature measurement and the maximum NTC source current is 16μA. The dynamic range for the NTC input is from 0 to 5 AN1174.1 January 4, 2007 Application Note 1174 Offset Voltage Measurement The ISL6295 incorporates a self-contained offset measurement as one of the input source selections for the A/D converter. When selected and enabled, the input of the A/D converter is internally shorted to the GND pin and an A/D conversion is performed. The result will be displayed on the “Results” area. Note this is only the IC offset, does not include the offset from the system. The evaluation boards have been factory calibrated to compensate the system offset. example, if you’d like to switch from Run mode to Sample Sleep Mode by the pack voltage, enter a threshold value in the VCtrip box, for instance 3100mV. Click the “SET” button. Check the VCent box and click the “TRIP CTRL” button, then reduce the supply voltage at the VP pin to below 3100mV. The IC supply current will drop from 80μA to 20μA, indicating the operation has been switched to Sample-Sleep mode. Refer to Table 2 for the trip point value and the comparison registers. TABLE 2. TRIP POINT VALUES Trip Controls/Accumulators Tab The Trip Controls/Accumulators tab allows the user to switch the power modes of the ISL6295 and configure the accumulator functions. Trip Control The ISL6295 has five operational power modes: Power ON, Reset, Run, Sample, Sample-Sleep and Shelf-Sleep. The default mode after power on rest is Run mode. In the “Trip Control/TPV Registers” area, the user can specify the transition conditions from Run mode to the others. The Trip Point Values (TPV) are also entered in this area. For 6 TPV REGISTER LOCATION COMPARISON REGISTER ENABLE BIT I+trip 60h Ires Iex I-trip 64h Ires Ient VPtrip 68h VPres VPex VCtrip 6Ch VPres or GPADres VPent or GPADent SStrip 70h VPres Shent AN1174.1 January 4, 2007 Application Note 1174 Accumulators TABLE 3. ACCUMULATOR CONTROL NAMES The Trip Controls/Accumulators tab allows the user to see the values or clear the values of the ISL6295 accumulators. To see the accumulator values, check the appropriate control names as listed in Table 3, and click the “ACCUM CTRL” tab. The current values will be displayed. To view the continuous update, check the “Loop” box and click the “READ ALL” button. To clear the value of an accumulator or counter, check the box next to the name of the accumulator or counter, and click the “ACCUM CLR” button. 7 Accum Accumulator master enable AccI Current Accumulator enable AccT Temperature Accumulator enable AccV GPAD Voltage Accumulator Enable Int Temp Temperature Accumulation selection. Unchecked: for internal temp sensor Checked: for external temp sensor AN1174.1 January 4, 2007 Application Note 1174 EEPROM/LUT Contents Tab The EEPROM/LUT Contents tab gives the user access to all ISL6295 registers, volatile or non-volatile EEPROM memory locations. The EODV (end of discharge voltage) table for fuel gauge modeling is also provided on this page. TABLE 4. RESERVED EEPROM LOCATIONS NAME ADDRESS NAME ADDRESS SMB Address 0x80 Pack Volt Gain 0x90, 0x91 Band Gap Trim 0x81 Freq Gain 0x92, 0x93 To read from a memory location, enter the address in the “addr” box in hex format, specify the memory bank number (refer to the memory map on the datasheet), specify the data length in number of byte (the program supports reading and writing 1, 2, or 4 bytes only), then click the “READ” button. The content will be displayed in a default decimal format. You may select Hex or Binary format in the “Format” area. Volt Ref Trim 0x82 GPAD Gain 0x94, 0x95 Main OSC Trim 0x83 GPAD Offset 0x96 clkTM 0x84 Int Temp Gain 0x99, 0x9A Test Mux 0x85 Int temp Offset 0x9B Aux OSC Trim 0x86 Ext Temp Gain 0x9D, 0x9E Current Gain 0x8D, 0x8E To write to a memory location, enter the value in the display box and click the “WRITE” button. Current Offset 0x8F Ext Temp Offset 0x9F - - CAUTION: Some critical calibration and initialization data is programmed into the EEPROM locations with default values at the time of the ISL6295 manufacture. Any modification to these values may cause incorrect operation or malfunction of the part. Refer to Table 4 for the reserved locations. 8 AN1174.1 January 4, 2007 Application Note 1174 Battery Pack Information Tab The Battery Pack Information tab allows the user to specify information necessary for fuel gauge operation. The information entered on this page includes: battery pack information, calibration information and the fuel gauge driver information. Display the default setting first by clicking “Read from EEPROM”. Make changes if necessary by overriding the fields (note some fields such as the Calibration/Testing Info, are read-only). If you would like to keep the updates permanently, click the “Write to EEPROM” button. The Battery Pack Information section allows the user to record the serial number, the manufacturer’s name and the manufacture date. Enter the manufacturing date in the drop down boxes and click “Set Mfg Date”. The Calibration/Testing section provides the calibration information for the critical parameters such as voltage, current, frequency and temperature. The calibration constants displayed here have been pre-programmed by 9 Intersil and are read-only. These calibration factors will be used during the fuel gauging calculation. The Fuel Gauge Driver Info section allows the user to enter fuel gauge related battery information such as EOC voltage, EOD voltage, EOC current, etc. (Note that a valid EOC Taper Current entry is between 10mA and 255mA). Changes will not take effect until user clicks “Write to EEPROM”. Setting EOD voltage to a non-zero value will override the EODV lookup table value. Since the fully charged condition is qualified when both the EOC voltage and the EOC taper current are met, these values must be set to some realistic numbers to qualify a fully charge condition. Typical values are 4.1V for EOC voltage and 100mA for EOC taper current. Fuel Gauging Driver Tab The Fuel Gauging Driver tab provides user the opportunity to perform a high accuracy calculation of the remaining cell capacity using the Intersil’s fuel gauging algorithm. AN1174.1 January 4, 2007 Application Note 1174 specified. The voltage is always displayed as a positive number. The current can be displayed either in a magnitude only format or a bipolar format to differentiate charge and discharge currents. To choose magnitude only format, set “DisplayAbsCurrent = 1” and “MinimumCurrent = 0”. To choose a bipolar format, set “DisplayAbsCurrent = 0” select a negative number as the “MinimumCurrent”. There are 10 divisions in the vertical scale. Each division has the value of 1/10 of the range defined by the maximum and minimum values. Follow these steps to setup the fuel gauging operation: 1. Change the Initial Capacity if necessary in the Battery Setting area, then click the “Set” button. 2. Select the refresh rates in the “Fuel Gauging timing” and “Timing for updating” drop down boxes. 3. Start the fuel gauge driver by clicking the “Start Driver” button. The results will be displayed on the “Fuel Gauging Meters” area, including the pack voltage, the charge/discharge current, the temperature of the internal temperature sensor, time to empty or time to full (depending on whether the pack is being charged or discharged), the battery remaining capacity and the relative state of charge (RSOC). An automatic “re-learning” function is implemented in this program to update the FCC value to reflect the most recent condition of the battery. To qualify a “re-learning” condition, the battery needs to be charged to a fully charged condition followed by a discharge to a fully discharged condition without stopping the fuel gauge driver or removing the supply voltage to the ISL6295EVAL1. The new FCC value will be displayed on the Fuel Gauge Driver page. But this updated FCC value will not be written to the EEPROM if the pack voltage is below 3.3V as required by the ISL6295 Spec. The program will wait for the pack to be charged to above 3.3V to update the new value in the EEPROM. The Battery Status area shows the current status of the fuel gauge operation, including the current direction, the initial state, and some alarm status. The status is provided by illuminating corresponding LED’s. The real time data is being recorded in a log file in Excel format in the directory <My Documents>\ISL6295. The file name is identified by the date and time when the data was recorded. The data in the log file is updated in a real time basis at the refresh rate specified on the Fuel Gauge Driver page. The cycle counter on the Fuel Gauge Driver page increments once for each amount of discharge equal to Full Capacity. The updated cycle count will be written to the EEPROM when the pack voltage is above 3.3V, similar to the FCC update. Graphical results are provided for charge/discharge current and the pack voltage. The vertical scales for both current and voltage can be defined on the initialization file in C:\Program Files\Intersil Corp\ISL6295\ISL6295.ini. The minimum and maximum values for the chart can be Board Design Information JP4 1 2 1 R1 1k U2 MM3077DN C1 100nF VDD 4 J3 B+ 2 1 U1 ISL6295 3 2 TP3 3 SCL VP TP2 6 VSS DOUT 1 2 3 2 1 6 7 JP1 Q1 1 8 1 R2 1k TP5 C3 1.0nF R4 221k 0.1% 5 TP7 J4 C R6 680 1 J5 D R7 680 6 1 J6 B- 1 GPAD GND TP4 D2 TP6 ROSC NTC 7 BZX585-C5V6 D1 4 SDA C2 100nF J2 Cell - V- DS COUT 4 CELL CONNECTION 5 5 Cell + 1 8 SR J7 NT 1 JP2 1 J8 GN 2 1 JP3 1 J9 GP 2 1 TP8 R5 0.020 1% SI6880EDQ TP1 C4 100nF FIGURE 3. SCHEMATIC OF EVAL BOARD 10 AN1174.1 January 4, 2007 Application Note 1174 ISL6295EVAL1 BILL OF MATERIALS ITEM QTY REFERENCE PART DESCRIPTION PCB FOOTPRINT 1 1 U1 ISL6295 fuel gauge IC 8L-TSSOP 2 1 U2 Single cell protection IC SOT-26A 3 1 Q1 Dual N-CH MOSFET, 20V, 20mΩ 4 2 R6, R7 SMD resistor, 680Ω, 1/16W 5 2 R1, R2 6 1 7 PART NUMBER VENDOR ISL6295CV Intersil MM3077DNRE Mitsumi Si6880EDQ Siliconix 0402 ERJ-2RKF6810X Panasonic SMD resistor, 1.0k, 1/16W 0402 ERJ-2RKF1001X Panasonic R4 SMD resistor, 221k, 1%, 1/16W 0402 ERJ-2RKF2213X Panasonic 1 R5 Sensor resistor, 20mΩ, 1% 1/4W 1206 WSL1206 Vishay 8 3 C1, C2, C4 Ceramic cap, 100nF, 10V, X7R 0402 ECJ-0EB1A104K Panasonic 9 1 C3 Ceramic cap, 1.0nF, 25V, X7R 0402 ECJ-0EB1E102K Panasonic 10 2 D1, D2 BZX585-C5V6 Phillips 11 1 PCB 12 8 13 Zener diode, 5.6V 8L-TSSOP SOD523 FR4, 0.062”, 1 OZ copper - ED130/4DS Any TP1 to TP8 Test pin, 37 mil Dia. 0.4” height - 0300-2-15-01-47-27-10-0 Mill Max 4 JP1 to JP4 2.54mm header, 2CKT - 22-28-4020 Molex 14 1 J1 2.54mm center header, 5CKT - 22-11-2052 Molex 15 1 J2 2.54mm center header, 3CKT - 22-11-2032 Molex - 1 Mate to J2 2.54mm terminal housing, 3CKT - 22-01-3037 Molex 16 1 J3 2.54mm center header, 2CKT - 22-11-2022 Molex 17 4 - Pumpon, 0.44X0.2, black - SJ-5303 3M/ESM 11 AN1174.1 January 4, 2007 Application Note 1174 PCB Layout FIGURE 4. SILK LAYER FIGURE 5. TOP LAYER 12 AN1174.1 January 4, 2007 Application Note 1174 PCB Layout (Continued) FIGURE 6. BOTTOM LAYER All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. 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 data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 13 AN1174.1 January 4, 2007