Evaluates: MAX8600/MAX8601 19-3794 Rev 0 8/05 MAX8601 Evaluation Kit General Description Features The MAX8601 evaluation kit (EV kit) is a fully assembled Dual-Input Li+ Charger and tested surface-mount PC board demonstrating the Up to 1A Programmable Fast Charge (from DC) MAX8601 single-cell, linear Li+ battery charger. The EV kit operates from either a 100mA/500mA USB port or a 100mA/500mA USB Select Input 4.15V to 14V input power supply however, charging is 4.15V to 7V Operating Voltage Range disabled when the input voltage exceeds 7V. Charging is optimized for Li+ cells using a control algorithm that 14V Input Overvoltage Protection for USB and DC includes low-battery precharging, voltage, and current- Programmable On-Chip Charge Timers limited fast charging, and top-off charging, while continu- ously monitoring the battery for overvoltage, over/under- Battery Thermistor Input temperature, and charging time. Charger Status Outputs The charger timeout protection is programmable. The charger status is indicated by three open-drain outputs. Logic-Low Enable Input The MAX8601 automatically selects between either a Thermally Optimized Charge Rate USB or an AC-adapter input source. The AC-adapter charge current is programmable, while the USB charge Male Type-B USB Jack current is preset not to exceed either 100mA or 500mA, 14-Pin (3mm x 3mm) TDFN Package depending on the USEL input. The MAX8601 EV kit also evaluates the MAX8600 with no PC board modification. Fully Assembled and Tested The MAX8601 is assembled in the space-saving 3mm x 3mm, 14-pin TDFN package. Ordering Information PART TEMP RANGE IC PACKAGE MAX8601EVKIT 0C to +70C 14 TDFN (3mm x 3mm) Note: To evaluate the MAX8600, request a free sample with the MAX8601EVKIT. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 3-pin header 1F 10%, 16V X5R ceramic JU3 1 SULLINS PTC36SAAN C1, C2 2 capacitors (0603) DIGIKEY S1012-36-ND Taiyo Yuden EMK107BJ105KA R1, R2, R4, R5 4 100k 5% resistors (0603) 0.068F 20%, 16V X5R ceramic C3 1 R3, R9 2 1k 5% resistors (0603) capacitor (0603) Taiyo Yuden EMK107BJ683MA R6 1 6.04k 1% resistor (0603) 2.2F 10%, 6.3V X5R ceramic R7, R8 2 3.01k 1% resistors (0603) C4 1 capacitor (0603) MAX8601ETD (14-pin TDFN 3mm x U1 1 TDK C1608X5R0J225K 3mm) Small red LED Shunts D1 1 Mouser 512-HLMP-1700 4 SULLINS STC02SYAN Male USB type-B connector, right Digi-key S9000-ND angle 1 MAX8601 EV kit PC board J1 1 Digikey AE1085-ND ASSMANN AU-Y1007 2-pin headers JU1, JU2, JU4 3 SULLINS PTC36SAAN DIGIKEY S1012-36-ND Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX8601 Evaluation Kit Recommended Equipment Detailed Description 20V, 2A variable power supply Input Source 5V power supply The MAX8601 is designed to charge a single-cell Li+ battery from a 4.15V to 7V DC source voltage or a 1-cell Li+ battery 100mA/500mA 5V USB port. The MAX8601 accepts Digital voltmeter (DVM) input voltages up to 14V, but disables charging when the input voltage exceeds 7.5V. A male, B-type USB Quick Start jack is available to connect the MAX8601 EV kit to a The MAX8601 EV kit is fully assembled and tested. standard 100mA/500mA USB port to power the EV kit. Follow these steps to verify board operation. Note that the +5V logic input supply is required when 1) Verify on the MAX8601 EV kit that there is no shunt charging from USB. on JU2. Charge Profile 2) Verify on the MAX8601 EV kit that there is a shunt The MAX8601 charger uses voltage, current, and ther- between positions 1 and 2 on JU3 to select a mal control loops to facilitate charging of a single Li+ 750mA DC charge current. cell and to protect the battery. When a Li+ battery with 3) Verify on the MAX8601 EV kit that there is a shunt a cell voltage below 3V is inserted, the charger enters on JU4 to disable the THM input. the prequalification stage, precharging the cell with 10% of the user-programmed fast-charge current. 4) Preset the variable 2A power supply to +5V. Turn Once the cell voltage rises above 3V, the charger soft- off the power supply. Do not turn on the power starts into the fast-charge stage. The fast-charge cur- supply until all connections are made. rent level is programmed with a resistor from SETI to 5) Ensure that the 5V power supply is off. Do not turn on GND (JU3). A red LED indicates the charge status. As the power supply until all connections are made. the battery voltage approaches 4.2V, the charging cur- 6) Connect the positive lead of the 2A power supply to rent is reduced. If the battery current drops below 7.5% the DCIN pad on the EV kit and the negative lead of of the fast-charging current, the red LED turns off sig- the power supply to the GND pad on the EV kit. naling the battery is charged however, charging con- tinues for an additional 30 minutes to top off the battery. 7) Connect the positive lead of the 5V power supply to After charging is complete, the charger restarts if the the VLOGIC pad on the EV kit and the negative lead battery voltage falls below 4.05V. See Table 1 for a of the power supply to the GND pad on the EV kit. description of the charge states. 8) Connect the DVM from BAT+ to BAT-. Setting the Charge Current (SETI, USEL) 9) Turn on the power supplies. Verify that the BAT+ The MAX8601 EV kit features an easily adjustable voltage is 4.2V. charge-current limit using JU3. JU3 allows the user to 10)Determine the correct Li+ cell polarity. Connect select one of three charge-current levels. Remove the the positive side of the single-cell Li+ battery to shunt to select a 500mA charge current, place the shunt BAT+. Connect the negative side of the single-cell between positions 1 and 2 to select 750mA charge cur- Li+ battery to BAT-. Monitor charging cycles. rent or between 2 and 3 to select a 1A charge current. 11) Repeat steps using the USB input. Component Suppliers SUPPLIER COMPONENT PHONE WEBSITE Assmann USB jack 877-ASSMANN www.assmann.com Panasonic Resistors 714-373-7366 www.panasonic.com Taiyo Yuden Capacitors 408-573-4150 www.t-yuden.com TDK Capacitors 888-835-6646 www.component.tdk.com Vishay Resistors 402-563-6866 www.vishay.com Note: Indicate you are using the MAX8600/MAX8601 when contacting these component suppliers. 2 Evaluates: MAX8600/MAX8601