19-3526; Rev 0; 11/04 MAX1535B Evaluation Kit/ MAX1535B Evaluation System The MAX1535B evaluation kit (EV kit) is an efficient, multichemistry battery charger. It uses the Intel System Management Bus (SMBus™) to control the battery regulation voltage, charger current output, and input current-limit set point. The MAX1535B EV kit can charge one, two, three, or four series Li+ cells with a current up to 8A. The MAX1535B evaluation system (EV system) consists of a MAX1535B EV kit and the Maxim SMBUSMON board. The MAX1535B EV kit includes Windows® 95-/98-/ 2000-/XP-compatible software to provide a user-friendly interface. Features ♦ 0.5% Battery Voltage Accuracy ♦ 3% Battery Charge-Current Accuracy ♦ Input Current-Limiting Set Point through SMBus Command ♦ Up to 8A Battery Charge Current ♦ Automatic Selection of System Power Source ♦ +8V to +25V Input Voltage Range ♦ Charges Li+, NiCd, NiMH Battery Chemistries ♦ SMBus-Compatible 2-Wire Serial Interface ♦ Includes Windows 95-/98-/2000-/XP-Compatible Software and Demo PC Board ♦ Fully Assembled and Tested Ordering Information IC PACKAGE SMBus INTERFACE TYPE MAX1535BEVKIT 0°C to +70°C 32 Thin QFN (5mm x 5mm) — MAX1535BEVSYS 0°C to +70°C 32 Thin QFN (5mm x 5mm) SMBUSMON PART TEMP RANGE Component Suppliers SUPPLIER PHONE FAX WEBSITE AVX 843-946-0238 843-626-3123 www.avxcorp.com Diodes Inc. 805-446-4800 805-446-4850 www.diodes.com General Semiconductor 760-804-9258 760-804-9259 www.gensemi.com International Resistive Co. (IRC) 361-992-7900 361-992-3377 www.irctt.com Kemet 864-963-6300 864-963-6322 www.kemet.com Murata 770-436-1300 770-436-3030 www.murata.com On Semiconductor 602-244-6600 602-244-4545 www.onsemi.com Sumida 847-545-6700 847-545-6720 www.sumida.com Taiyo Yuden 800-348-2496 847-925-0899 www.t-yuden.com TDK 847-803-6100 847-390-4405 www.component.tdk.com Vishay Dale 402-564-3131 402-563-6296 www.vishay.com Note: Indicate you are using the MAX1535B when contacting these manufacturers. SMBus is a trademark of Intel Corp. Windows is a registered trademark of Microsoft Corp. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluate: MAX1535B General Description Evaluate: MAX1535B MAX1535B Evaluation Kit/ MAX1535B Evaluation System Component List DESIGNATION C1 C2 C3, C4, C5 C6, C8, C10 C7, C9 DESCRIPTION 1 2.2µF ±20%, 35V B-size tantalum capacitor AVX TAJB225M035 Kemet T491B225M035AS 1 3 3 2 DESIGNATION QTY DESCRIPTION D1 1 0.5A, 30V Schottky diode (SOD123) Diodes Inc. B0530W General Semiconductor MBR0530 On Semiconductor MBR0530 1µF ±10%, 25V X7R ceramic capacitor (1206) Murata GRM31MR71E105K Taiyo Yuden TMK316BJ105KL TDK C3216X7R1E105K D2 0 Not installed J1 1 2 x 10 right-angle female receptacle J2 1 Smart-battery header assembly, right angle, keyless, five position 0.01µF ±10%, 50V X7R ceramic capacitors (0603) Murata GRM188R71H103K Taiyo Yuden UMK107B103KZ TDK C1608X7R1H103K JU1, JU2, JU3 0 Not installed L1 1 4.3µH, 11A, 11.4mΩ inductor Sumida CEP125-4R3MC-U N1 1 13.5A, 30V N-channel MOSFET (SO8) Fairchild FDS6670S P1–P8 8 -13A, -30V P-channel MOSFETs (SO8) Fairchild FDS6679Z R1, R2 2 0.01Ω ±1%, 1W sense resistors (2512) Vishay Dale WSL2512 0.010 1.0% IRC LRC-LRF2512-01-R010-F R3 1 365kΩ ±1% resistor (0805) R4 1 49.9kΩ ±1% resistor (0805) R5 1 1MΩ ±5% resistor (0805) 0 Not installed (0603) 0.1µF ±10%, 25V X7R ceramic capacitors (0603) Murata GRM188R71E104K TDK C1608X7R1E104K 1µF ±10%, 16V X7R ceramic capacitors (0805) Murata GRM21BR71C105K Taiyo Yuden EMK212BJ105KG TDK C2012X7R1C105K C11, C12, C15, C16 0 Not installed (2220) R6, R7, R16–R19 1 20kΩ ±5% resistor (0603) 4 22µF ±20%, 25V X5R ceramic capacitors (2220) TDK C5750X5R1E226M R8 C13, C14, C17, C18 R9–R12 4 10kΩ ±5% resistors (0805) R13 1 33Ω ±5% resistor (0805) C19–C22 0 R14, R15 0 Not installed R20 1 5.1Ω ±5% resistor (0603) R21 1 69.8kΩ ±1% resistor (0603) R22 1 49.9kΩ ±1% resistor (0603) R23 1 14.7kΩ ±1% resistor (0603) R24 1 100kΩ ±1% resistor (0603) R25 1 10Ω ±5% resistor (0603) U1 1 MAX1535BETJ, 32-pin, 5mm x 5mm, thin QFN C24 2 QTY 1 Not installed (0805) 3300pF ±10%, 50V X7R ceramic capacitor (0603) Murata GRM188R71H332K Taiyo Yuden UMK107B332KZ TDK C1608X7R1H332K _______________________________________________________________________________________ MAX1535B Evaluation Kit/ MAX1535B Evaluation System Recommended Equipment • DC source to supply the input current to the charger. This source must be capable of supplying a voltage greater than the battery-voltage set point and have sufficient current rating. • Voltmeter • • • • Smart battery Computer running Windows 95, 98, 2000, or XP 9-pin serial extension cable SMBUSMON board Procedure The MAX1535B EV kit is a fully assembled and tested board. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed. Observe all precautions on the battery manufacturer’s data sheet. 1) Set the VPP jumper on the SMBUSMON board to VCC5. 2) Carefully connect the boards by aligning the 20-pin connector of the MAX1535B EV kit with the 20-pin header of the SMBUSMON board. Gently press them together. 3) Connect a cable from the computer’s serial port to the SMBUSMON interface board. Use a straight-through 9-pin female-to-male cable. 4) Install the software by running the INSTALL.EXE program. The install program copies the files and creates icons for them in the Windows 95/98/2000/XP start menu. An uninstall program is included with the software. Click on the UNINSTALL icon to remove the EV kit software from the hard drive. 5) Connect power to the SMBUSMON board. 6) Connect the input-current supply across the ADAPTER_IN and PGND pads. 7) Connect a smart battery to connector J2. 8) Turn on the power supply. 9) Start the MAX1535B EV kit software. 10) Verify current is being delivered to the battery. Detailed Description of Software The MAX1535B program provides easy access to the MAX1535B registers. It is also capable of reading the registers of a smart battery and monitoring SMBus traffic. Upon execution of the program, the software enables the MAX1535B smart-charger command panel (Figure 1), after which any of the allowed SMBus commands can be sent to the MAX1535B. Refer to the MAX1535B data sheet for more information regarding the allowed SMBus commands. Smart-Charger Command Panel ChargeVoltage() To issue the ChargeVoltage() command to the MAX1535B, enter the desired voltage, in millivolts, into the Charging Voltage edit field and select the adjacent Write button. ChargeCurrent() To issue the ChargeCurrent() command to the MAX1535B, enter the desired current, in milliamps, into the Charging Current edit field and select the adjacent Write button. Auto Rewrite Checkboxes The MAX1535B needs to receive a ChargeVoltage() or ChargeCurrent() command every 175s (typ); otherwise, the MAX1535B times out and terminates charging. Usually, a smart battery sends these necessary commands. However, when not using a smart battery with the MAX1535B EV kit, select either (or both) of the Auto Rewrite checkboxes located directly under the Charging Current and Charging Voltage edit fields. This generates a ChargeVoltage() or ChargeCurrent() command at the selected time interval located on the Timer panel. ChargerMode() To issue the ChargerMode() command to the MAX1535B, select a combination of checkboxes in the Charger Mode panel of commands. Each checkbox represents a bit in the ChargerMode() command word. Select the checkboxes next to the bits for which the software should write a 1, unselect the checkboxes for a 0. Send the command by selecting the Write button. ChargerStatus() Charger status is shown in the Charger Status panel. Each of the bits in the ChargerStatus() command word are shown individually with a short description of the bit. By default, the status is automatically read once every two seconds. Disable this feature by unselecting the Active Read: Charger checkbox located on the Timer panel. Change the refresh time by entering a new value into the Timer Interval edit box and select the Set Interval button. When Auto Refresh is disabled, issue a ChargerStatus() command by selecting the Read button on the Charger Status panel. _______________________________________________________________________________________ 3 Evaluate: MAX1535B Quick Start Evaluate: MAX1535B MAX1535B Evaluation Kit/ MAX1535B Evaluation System ChargerSpecInfo() ChargerSpecInfo() returns the Charger Specification (0x0002) from the MAX1535B. This command is available through the “Other Bitmapped Charger Registers...” panel. Select Charger Spec Info by picking it from the pulldown list located directly under the Other Bitmapped Charger Registers... label. Issue a ChargerSpecInfo() command by selecting the Read button. The returned hexadecimal value is shown at the bottom of the panel. DeviceID() DeviceID() returns the Device ID (0x0006) from the MAX1535B. This command is available through the Other Bitmapped Charger Registers... panel (Figure 2). Select Device ID by picking it from the pulldown list located directly under the Other Bitmapped Charger Registers... label. Issue a DeviceID() command by selecting the Read button. The returned hexadecimal value is shown at the bottom of the panel. AlarmWarning() Alarm Warning is shown on the Other Bitmapped Charger Registers... panel (Figure 2). Select Alarm Warning by picking it from the pulldown list located directly under the Other Bitmapped Charger Registers... label. Each of the bits in the AlarmWarning() command word are shown individually with a short description of the bit and a checkbox. Select the checkboxes next to the bits for which the software should write a 1; unselect the checkboxes for a 0. Send the command to the MAX1535B by selecting the Write button. The software is capable of reading the registers of a smart battery. The smart battery page of the software is shown in Figure 3. The software only reads the registers selected with checkmarks. By default, the registers are automatically read once every two seconds. Disable this feature by unselecting the Active Read: Battery checkbox located on the Timer panel. Change the refresh time by entering a new value into the Timer Interval edit box and select the Set Interval button. When Auto Refresh is disabled, read the battery by selecting the Refresh button. InputCurrent() Input Current is shown on the Other Bitmapped Charger Registers... panel (Figure 2). Select Input Current by picking it from the pulldown list located directly under the Other Bitmapped Charger Registers... label. Each of the bits in the InputCurrent() command word are shown individually with a short description of the bit and a checkbox. Select the checkboxes next to the bits for which the software should write a 1; unselect the checkboxes for a 0. Send the command to the MAX1535B by selecting the Write button. Note: The default input-current-limit setting at POR is 256mA. All codes requesting input current greater than 11.004A result in an input-current overrange, limiting the input current to 11.004A. ManufacturerID() ManufacturerID() returns the Manufacturer ID (0x004D) from the MAX1535B. This command is available through the Other Bitmapped Charger Registers... panel (Figure 2). Select Manufacturer ID by picking it from the pulldown list located directly under the Other Bitmapped Charger Registers... label. Issue a ManufacturerID() command by selecting the Read button. The returned hexadecimal value is shown at the bottom of the panel. 4 Smart-Battery Command Panel Detailed Description of Hardware The MAX1535B includes all the functions necessary to charge a smart battery. The EV kit is capable of charging with a maximum current of 8.064A and a maximum voltage of 19.2V. For more information on the operation of the MAX1535B, refer to the Detailed Description section of the MAX1535B data sheet. Connecting a Smart Battery The MAX1535B EV kit includes a 5-pin smart battery connector. To connect a smart battery to the EV kit, turn off power to the EV kit and connect the battery, making sure to correctly orient the connectors. Evaluating the MAX1535B Above 25V To evaluate the MAX1535B with an input voltage greater than 25V (up to 28V), capacitors C1, C2, C13, and C14 must be replaced with higher voltage-rating parts. Any capacitors that were installed in locations C11, C12, C19, and C20 must also meet the higher voltage rating. _______________________________________________________________________________________ MAX1535B Evaluation Kit/ MAX1535B Evaluation System Evaluate: MAX1535B Figure 1. MAX1535B Smart-Charger Command Panel _______________________________________________________________________________________ 5 Evaluate: MAX1535B MAX1535B Evaluation Kit/ MAX1535B Evaluation System Figure 2. MAX1535B Smart-Charger Command Panel Showing the Pulldown List for Charger Spec Info, Alarm Warning, Input Current, Manufacturer ID, and Device ID 6 _______________________________________________________________________________________ MAX1535B Evaluation Kit/ MAX1535B Evaluation System Evaluate: MAX1535B Figure 3. Smart-Battery Command Panel _______________________________________________________________________________________ 7 Evaluate: MAX1535B MAX1535B Evaluation Kit/ MAX1535B Evaluation System ADDPWR_D 6 5 ADDPWR_S 7 8 ADAPTER_IN PDS 6 5 3 2 4 P1 1 1 PDS 3 2 56 78 C1 2.2µF 1 R25 10Ω R3 365kΩ 1% VDD R7 SHORT C5 0.01µF R8 20kΩ VDD ACIN 7 8 12 VDD R10 10kΩ 14 SDA SMBCLK VDD R11 10kΩ SMBALERT VDD R12 10kΩ INT 3 2 1 P7 65 PLD 16 AGND C6 0.1µF 3 2 P8 78 65 R13 33Ω 24 C10 0.1µF 1 4 26 3 2 P5 6 5 7 8 7 8 6 5 N1 23 4 3 2 PGND 22 VDD 1 DHI 4 P6 1 6 5 3 2 7 8 L1 4.3µH 1 CSIP 21 THM C21 OPEN SDA BATT SCL I.C. INT DAC REF GND GND IMAX VMAX 10 9 11 5 18 4 REF REF REF R21 C7 69.8kΩ 1µF 1% R14 OPEN C22 OPEN 20 R18 OPEN R19 SHORT R2 0.01Ω 1% BATT+ BATT+ 19 17 C15 OPEN REF R23 14.7kΩ 1% C16 OPEN C17 22µF C18 22µF BATT- REF R15 OPEN R24 100kΩ 1% R22 49.9kΩ 1% Figure 4. MAX1535B EV Kit Schematic 8 LOAD BATT+ CCI CCV 4 C14 22µF C13 22µF LDO DHI DHI C12 OPEN 78 R20 5.1Ω CSIN 15 SCL DLOV DLO 13 C24 SMBDATA 3300pF 4 U1 MAX1535B R9 10kΩ THM PLD LDO 2 32 ACOK 6 CCS C4 0.01µF THM DCIN R5 1MΩ R6 SHORT C11 OPEN C8 0.1µF 28 25 CSSN DHIV 30 PDL 31 29 SRC PDS CSSP LDO C3 0.01µF JU3 R17 SHORT SRC C9 1µF 3 ACOK JU2 C19 C20 OPEN OPEN C2 1µF D1 R4 49.9kΩ 1% R16 SHORT REVBLKS JU1 4 P2 27 D2 OPEN R1 0.01Ω 1% 78 1 3 2 56 4 P3 4 P4 SRC PDS 7 8 PDS PGND 3 2 1 REVBLK_D _______________________________________________________________________________________ MAX1535B Evaluation Kit/ MAX1535B Evaluation System VDD J1-2 J1-3 SMBDATA J1-4 J1-5 J1-6 SMBCLK J1-7 J1-9 J1-15 J1-17 J1-19 NC NC J2-6 J2-2 J2-7 J1-10 SMBALERT NC THM J2-1 J1-8 NC J1-11 J1-13 BATT- Evaluate: MAX1535B J1-1 SMBDATA J1-12 J2-3 J2-8 J1-14 J1-16 SMBCLK J2-4 J2-9 J1-18 J1-20 NC HEADER-20P BATT+ J2-5 J2-10 SMART BATTERY CONNECTOR Figure 5. MAX1535B EV Kit Schematic—Smart Battery Connector _______________________________________________________________________________________ 9 Evaluate: MAX1535B MAX1535B Evaluation Kit/ MAX1535B Evaluation System Figure 6. MAX1535B EV Kit Component Placement Guide—Component Side 10 ______________________________________________________________________________________ MAX1535B Evaluation Kit/ MAX1535B Evaluation System Evaluate: MAX1535B Figure 7. MAX1535B EV Kit PC Board Layout—Component Side ______________________________________________________________________________________ 11 Evaluate: MAX1535B MAX1535B Evaluation Kit/ MAX1535B Evaluation System Figure 8. MAX1535B EV Kit PC Board Layout—VDD and Power Ground Plane 12 ______________________________________________________________________________________ MAX1535B Evaluation Kit/ MAX1535B Evaluation System Evaluate: MAX1535B Figure 9. MAX1535B EV Kit PC Board Layout—Ground Plane ______________________________________________________________________________________ 13 Evaluate: MAX1535B MAX1535B Evaluation Kit/ MAX1535B Evaluation System Figure 10. MAX1535B EV Kit PC Board Layout—Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.