DEMO MANUAL DC1645A-A/DC1645A-B/ DC1645A-C/DC1645A-D LTM8061-4.1/LTM8061-4.2/ LTM8061-8.2/LTM8061.4 32V, 2A Module Li-Ion Battery Charger DESCRIPTION Demonstration circuits 1645A-A, 1645A-B, 1645A-C and converter on or off. JP2 allows for easy selection of C/10 1645A-D feature the LTM8061, a 32V, 2A Module Li-Ion or timer charge termination. The LTM8061 datasheet must battery charger. Operating from a 6.5V to 32V input source, be read in conjunction with this demo manual for working the 1645A-A and 1645A-B demo circuits charge single cell on or modifying the demo circuit 1645A. Li-Ion batteries to oat voltages of 4.1V or 4.2V respectively. Design les for this circuit board are available at The 1645A-C and 1645A-D demo circuits operate from a DEMO MANUAL DC1645A-A/DC1645A-B/ DC1645A-C/DC1645A-D QUICK START PROCEDURE Demonstration circuits 1645A-A, 1645A-B, 1645A-C and 9. Set JP1 to ON. Connect a jumper from the NTC pin 1645A-D are easy to set up to evaluate the performance of the to ground. Verify the charging current, I , is less BAT LTM8061-4.1, LTM8061-4.2, LTM8061-8.2, LTM8061-8.4. than 5mA and the FAULT LED and the CHRG LED are on. Refer to Figure 1 for proper measurement and equipment setup. 10. Remove the jumper from NTC to ground. Verify the charging current, I , is between 1.775A and 2.225A, BAT DC1645A-A and DC1645A-B the FAULT LED is off and the CHRG LED is on. Follow the procedure below for demo circuits 1645A-A 11. This concludes the test for the A and B versions. Turn and 1645A-B off PS1 and PS2. 1. Jumper and Power Supply Setting: DC1645A-C and DC1645A-D JP1 = ON PS1 = OFF Follow the procedure below for demo circuits -C and -D JP2 = C/10 PS2 = OFF 1a. Jumper and Power Supply Setting: 2. Turn on PS2 and slowly increase the voltage to 2.7V JP1 = ON PS1 = OFF while monitoring the current into the BAT pin. If the current is less than 5mA, turn on PS1 and increase JP2 = C/10 PS2 = OFF voltage to 12V. 2a. Turn on PS2 and slowly increase the voltage to 5.4V 3. Verify that the battery charging current, I , is be- while monitoring the current into the BAT pin. If the BAT tween 250mA and 350mA. The CHRG LED should be current is less than 5mA, turn on PS1 and increase on and the FAULT LED should be off. voltage to 12V. 4. Increase PS2 until V is 3.6V. Verify the input cur- 3a. Verify that the battery charging current, I , is be- BAT BAT rent, I , is between 700mA and 850mA, the battery tween 250mA and 350mA. The CHRG LED should be IN current, I , is between 1.775A and 2.225A and that on and the FAULT LED should be off. BAT the CHRG LED remains on. 4a. Increase PS2 until V is 7.2V. Verify the input BAT 5. Increase PS2 until V is 4.3V. Verify the battery current, I , is between 1200mA and 1700mA, the BAT IN charging current, I , is less than 5mA and the battery current, I , is between 1.775A and 2.225A BAT BAT CHRG LED is off. and the CHRG LED remains on. 6. Decrease PS2 until V is 3.9V. Verify the battery 5a. Increase PS2 until V is 8.6V. Verify the battery BAT BAT current, I , is between 1.775A and 2.225A and the charging current, I , is less than 5mA and the BAT BAT CHRG LED is on. CHRG LED is off. 7. Decrease PS2 until V is 3.6V. Connect a 10k resistor 6a. Decrease PS2 until V is 7.8V. Verify the battery BAT BAT from RNG/SS to ground. Verify the charging current, current, I , is between 1.775A and 2.225A and that BAT I , is between 850mA and 1.0A. Verify the voltage the CHRG LED is on. BAT at V , is between 450mV and 550mV. Remove RNG/SS 7a. Decrease PS2 until V is 7.2V. Connect a 10k re- BAT the 10k resistor. sistor from RNG/SS to ground. Verify the charging 8. Set JP1 to OFF. Verify the charging current, I , is current, I , is between 800mA and 1.0A. Verify the BAT BAT less than 5mA and the FAULT LED and the CHRG LED voltage at V , is between 450mV and 550mV. RNG/SS are off. Remove the 10k resistor. dc1645af 2