LX2207 EVALUATION BOARD USER GUIDE LX2207 THREE LEVEL BATTERY CHARGER (1A MAXIMUM) I N T E G R A T E D Copyright © 2002 Rev. 1.0, 2006-12-22 P R O D U C T S Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX2207 EVALUATION BOARD USER GUIDE INTRODUCING TO PRODUCT The LX2207 Evaluation Board is available from Microsemi for evaluating the performance of the LX2207 Battery Charger Integrated Circuit. The component sizes used on the evaluation board facilitate easy probing, however, in practice, smaller component sizes are recommended to minimize the circuit physical size. KEY FEATURES Three charge levels for adapter, and USB Hi and Low 0.5% Float voltage tolerance Charging up to 1A. Charging from USB port. USB current compliance Full battery Indicator CC/CV w thermal Feedback Battery temp monitor Precision charge termination Power Good Indication APPLICATIONS • • • • • MP3 player PDA PMC Digital Camera Charge cradle PART SPECIFIC INFORMATION Part Number LX2207ILD Product Three Level Lithium Ion Battery Charger TABLE 1 – PART INFORMATION IC LX2207ILD EVALUATION BOARDS LX2207 EVAL KIT TABLE 2 – EVALUATION BOARD INFORMATION Copyright © 2002 Rev. 1.0, 2006-12-22 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX2207 EVALUATION BOARD USER GUIDE SCHEMATIC FOR LXE Figure 1 – LX2207 Evaluation Board Schematic Copyright © 2002 Rev. 1.0, 2006-12-22 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 LX2207 EVALUATION BOARD USER GUIDE IC BLOCK DIAGRAM + SD ENABLE DCOK UVLO STAT TMP CHARGE CONTROL BAT IN CHARGE TERMINATION CONTROL CONSTANT VOLTAGE CONTROL TEMPERATURE CONTROL CONDITIONING THRESHOLD H/L COND. CURRENT 20% LCP HCP LOW CHARGING CURRENT HIGH CHARGING CURRENT GND Figure 2 – Simplified Block Diagram Copyright © 2002 Rev. 1.0, 2006-12-22 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 LX2207 EVALUATION BOARD USER GUIDE LX2207 EVAL Connections. The LX2207 Evaluation Board has one power input and one power output connection. FUNCTION PIN NAME 2) Move the SHUTDOWN jumper to the ON position, the USB jumper to the 500mA position and the POWER SELLECT jumper to the WALL position. 3) Apply a +5V power source to the PWR terminal and the power supply return to the GND terminal. VOLTAGE 4) The POWER ATTACHED and CHARGING LEDs should be lit when the battery is charging and the POWER ATTACHED and FULL LEDs should be lit when the battery is fully charged. Input Power PWR 5V +/- 0.65V Input RTN GND 0V Battery + BAT+ 0V to 4.3V 5) Monitor the charge current into the battery with a current probe. Battery - RTN 0V 6) Verify the charge current changes from approximately 1A to approximately 460mA when the POWER SELECT jumper is moved from the WALL to the USB position. Jumpers. The LX2207 Evaluation Board has three two position jumper blocks. The jumper can be moved to select either a high logic level or low logic level. It is also possible to remove the jumper and apply a voltage directly to the center pin of the jumper block. Hookup. The following is a demonstration scenario that can be used to evaluate the LX2207. 1) Apply the single cell Lithium Ion or Lithium polymer battery to the battery screw terminal block. Be sure to connect the positive terminal of the battery to the BAT+ terminal and the Negative terminal to the RTN terminal. Copyright © 2002 Rev. 1.0, 2006-12-22 7) With the POWER SELECT jumper in the USB position, verify the charge current changes from approximately 460mA to approximately 92mA when the USB jumper is moved from the 500mA position to the 100mA position. 8) Verify that moving the SHUTDOWN battery to the OFF position extinguishes the LEDs and terminates the charge cycle. 9) The thermal lockout can be tested by momentarily applying a jumper between the RTC and RTN on the BAT TEMP jumper terminal. When the jumper is in place, the charging current will drop to zero, but the charge LED will remain illuminated. Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 LX2207 EVALUATION BOARD USER GUIDE LX2207 TYPICAL TEST HOOKUP Figure 3 – LX2207 Typical Test Hookup PCB LAYOUT RECOMMENDATIONS It is recommended that C1and C2 be located within 1cm of the LX2207. The CMP capacitor1 should be located close to the IN and CMP pins. Also the high impedance summing node connecting to the TMP pin should be kept as short aspossible. It is important that the LX2207 have a good thermal path to ambient to dissipate heat. The simplest way to do this is to heatsink the LX2207 bottom pad directly to the ground plane by placing 4 or more vias in the ground pad directly under the LX2207 footprint. 1 Since the initial release of the LX2207 evaluation board, our recommended CMP circuit has changed from a 0.47uF capacitor alone to a series combination of a 1K resistor and 0.47uF capacitor. Copyright © 2002 Rev. 1.0, 2006-12-22 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6 LX2207 EVALUATION BOARD USER GUIDE LX2207 PRINTED CIRCUIT BOARD LAYOUT BAT TEMP CHARGING FULL POWER ATTACHED WALL USB ON 500mA 100mA 3 31 OFF STATUS R2 3 1 GND SHUTDOWN C3 R6 R3 R7 C1 PWR R11 1 LX2207 USB R8 R10 R9 R5 R4 R1 C2 BATTERY RT1 1 BAT+ RTN INTEGRATED PRODUCTS POWER SELECT RTN NTC LX2207 THREE LEVEL LITHIUM-ION BATTERY CHARGER EVAL PCB Figure 4 – LX2207 Evaluation Board Layout Copyright © 2002 Rev. 1.0, 2006-12-22 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 7 LX2207 EVALUATION BOARD USER GUIDE LX2207 EVALUATION BOARD BILL OF MATERIALS MISCELLANEOUS COMPONENTS Line Item Part Description 1 2 3 4 5 6 Microsemi IC – Tri Level Li-Ion Charger LED - Amber LED - Red LED - Green Thermistor – NTC, 100k Terminal Block 2 position/ 7mm spacing 7 Header 3 pin 0.100in spacing 8 9 10 11 Header 2 pin 0.100in spacing Header 1 pin Jumper, 2 Pos, 0.100 inch spacing Printed Circuit Board Manufacturer & Part # MICROSEMI Panasonic Panasonic Panasonic Vishay OST Microsemi LX2207ILD LNJ414K8YRA LNJ214K8ARA LNJ314G8TRA NTHS0402N01N1003J OST/2/7.0 Case 3x3 MLP 0603 0603 0603 0402 Reference Designators U1 CHARGING FULL POWER ATTACH RT1 BATTERY I PGM, SHUTDN, PWR SEL BAT TEMP PWR, GND I PGM, SHUTDN SGE#3546 X1 Qty 1 1 1 1 1 1 3 1 2 2 1 CAPACITORS Line Item 1 2 Part Description Capacitor, X5R, 10uF, 10V, 10% Capacitor, X7R, 0.47uF, 16V, 20% Part Number Case Reference Designators Qty Taiyo Yuden LMK316BJ106KD-T Taiyo Yuden EMK212BJ474KD-T 1206 0805 C1,2 C3 2 1 Case Reference Designators Qty 0805 0805 0805 0805 0805 0805 R1,2,11 R3,6,7 R4 R5 R8 R10 3 3 1 1 1 1 RESISTORS Line Item 1 2 3 4 5 6 Part Description Resistor, 1.00K, 1%, 1/10W Resistor, 2.49K, 1%, 1/10W Resistor, 19.6K, 1%, 1/10W Resistor, 8.66K, 1%, 1/10W Resistor, 121K, 1%, 1/10W Resistor, 24.9K, 1%, 1/10W Copyright © 2002 Rev. 1.0, 2006-12-22 Part Number Panasonic Panasonic Panasonic Panasonic Panasonic Panasonic ERJ-6ENF1001V ERJ-6ENF2491V ERJ-6ENF1962V ERJ-6ENF8661V ERJ-6ENF1213V ERJ-6ENF2492V Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 8