LX2205 EVAL KIT

LX2205 EVALUATION BOARD USER GUIDE LX2205 BATTERY CHARGER & POWER INTERFACE ® TM Copyright © 2007 Rev. 1.0, 2007-06-05 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX2205 EVALUATION BOARD USER GUIDE INTRODUCING TO PRODUCT The LX2205 Evaluation Board is available from Microsemi for evaluating the performance of the LX2205 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 ƒ ƒ ƒ ƒ ƒ ƒ ƒ Charging up to 1A. Charging from USB port. USB current compliance Auto battery switchover CC/CV w thermal Feedback Battery temp monitor Precision Charge Termination APPLICATIONS ƒ ƒ ƒ ƒ ƒ Navigation Devices Portable USB Devices Multi-Media Player PDA Phones Digital Cameras PART SPECIFIC INFORMATION Part Number LX2205ILQ Product Battery Charger and Power Interface TABLE 1 – PART INFORMATION IC LX2205ILQ EVALUATION BOARDS LX2205 EVAL KIT TABLE 2 – EVALUATION BOARD INFORMATION Copyright © 2007 Rev. 1.0, 2007-06-05 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX2205 EVALUATION BOARD USER GUIDE SCHEMATIC FOR EVB J2 SYS LOAD GND USB GND MDC GND 1 2 3 4 5 6 SHDN OFF 1 2 ON 3 SUSP SUSP 1 2 USB ON 3 UCL USB HI 1 2 USB LO 3 VCC 1 2 3 D3 SS22 5 4 R10 10k R11 10k R12 10k 6 7 8 10 MDC USB SHDN SUSP UCL LX2205 U1 CMP CHG DONE TFB C2 10uF 1 SYS 3 2 BAT VCC J1 C3 0.1uF CHG DONE R4 14 2.49k 15 R5 2.49k 16 DCOK 13 GND CTP CUS CCP 11 9 12 R1 R2 R3 49.9k 20k 2.26k R7 NU 1 TEMP 2 GND 3 BAT 4 GND C1 10uF R6 121k R8 24.9k RT1 100k R9 10k DC OK GND VCC Figure 1 – LX2205 Evaluation Board Schematic Copyright © 2007 Rev. 1.0, 2007-06-05 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 LX2205 EVALUATION BOARD USER GUIDE IC BLOCK DIAGRAM MDC Wall Adapter DC OK Supervisor SYS Input Current Limit USB USB Power Ideal Diode System Load Compensation CMP Ground GND BAT Li-Ion Battery Charger CHG CTP DONE Charge Status Indicators Taper Current Setting SHDN Shutdown SUSP Suspend USB Control CCP UCL Charge Current Setting High/Low SYS TFB Battery Temp Battery Temperature Monitor CUS USB Current Setting Figure 2 – Simplified Block Diagram Copyright © 2007 Rev. 1.0, 2007-06-05 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 LX2205 EVALUATION BOARD USER GUIDE LX2205 EVB TEST PROCEDURE Connections. The LX2205 Evaluation Board has two power input and two power output connections. GND is the return for all inputs and outputs. FUNCTION PIN NAME VOLTAGE Adapter Power MDC 5V +/- 0.65V USB Power USB 5V +/- 0.65V Battery + BAT+ 0V to 4.3V System Load SYS LOAD 2.8Ω < R < ∞ The following is a test procedure for the LX2205 evaluation board: 1) Place the jumpers in the following positions: VCC SHDN SUSP UCL Place in the BATTERY position. Place in the ON position. Place in the USB ON position. Place in the USB HI position. 2) Apply the Battery Simulator (referred to below as the battery) between the BAT terminal and GND terminal. Adjust the battery voltage to 3.9V. 3) Battery Simulator + + Variable Power Supply 2 Ohm 15 Watt - Copyright © 2007 Rev. 1.0, 2007-06-05 To LX2205 - 4) Verify the DCOK pin is >3.7V. 5) Apply a 5.0V power source between the MDC terminal and GND terminal. 6) Verify the CHG LED is illuminated. 7) Verify the voltage at the DCOK test point is