Техническая Спецификация для Texas Instruments Evaluation Module for BQ24140, 1.5A Dual Input Switchmode Charger with USB-OTG Support BQ24140EVM-003 BQ24140EVM-003
Модели
BQ24140EVM-003
Test Summary
1. Ensure that
steps are followed.
2. Turn on PS#1. Turn on Load#2 but set its constant voltage to below 2.05V and move the SLRST
jumper shunt to LO.
3. With the software running, disable the Immediate Updates, Periodic Resets, and Periodic Reads
features.
4. Increase Load#2 constant voltage to 2.5V and move the SLRST jumper shunt to HI.
5. Use the appropriate drop-down box (Maximum Battery Regulation Voltage or Maximum Charge
Current) to select the desired maximum value.
6. Click the now active Write button(S) in VBUS registers section in the lower right corner of the GUI.
7. Re-enable the Immediate Updates, Periodic Resets, and optionally Periodic Reads
The Maximum Charge Current and Maximum Battery Regulation Voltages drop down boxes now display
the updated values and the charger is now ready for evaluation.
the updated values and the charger is now ready for evaluation.
2.4.2
Charge Voltage and Current Regulation from VIN
1. Ensure that the
steps are followed. Turn on PS #1.
2. Software setup on VIN tab:
•
Ensure that Immediate Updates is enabled.
•
Check Periodic Resets, and set Rate to 5 seconds.
•
Ensure that Operation Mode is Charger mode.
•
Uncheck Charge Current Termination.
•
Check STAT pin.
•
Ensure that the Input Current Limit is 500 mA.
•
Ensure that the Charge Current is 550 mA.
•
Set Charge Current Sense Voltage to Normal.
•
Set Battery Regulation Voltage to 4.2 V.
Measure on VM #2
→
V(J10/TP10, J11,TP11(VBAT, GND)) = 4.2 ± 100 mV
Observe
→
D3 is on and D4 is blinking.
3. Enable Load #2. Adjust PS #1 so that VM #1 still measures 5 V ± 100 mV
Measure on CM #2
→
Ichrg = 550 mA ± 50 mA
Measure on CM #1
→
Iin = 300 mA ± 50 mA
4. Software setup: Check Disable Charger.
5. Turn off PS #1, turn off Load #2, and disconnect.
2.4.3
Charge Voltage and Current Regulation from VBUS
1. Connect the output of Power Supply #1 in series with a current meter (multimeter) to J3 (VBUS, GND).
2. Connect a voltage meter across J6 and J9 (VBUS, GND).
3. Repeat steps in
except on the VBUS tab.
2.4.4
Boost Function
1. Adjust PS #1 output to 3.7 V, and disable the output.
2. Connect the PS #1 in series with a current meter (multimeter) to J7 (BAT, GND). Ensure that a voltage
meter is connected across J10/TP10 and J11/TP11 (BAT, GND).
3. Set the Load #1 so that either constant current or equivalent resistance yields a 200 mA ± 20 mA dc
load, then disable the output. Connect the output of the Load #1 in series with a current meter
(multimeter) to J3 (VBUS, GND). Ensure that a voltage meter is connected across J6/TP2 and
J9/TP13 (VBUS, GND). The setup is now configured as is shown in
(multimeter) to J3 (VBUS, GND). Ensure that a voltage meter is connected across J6/TP2 and
J9/TP13 (VBUS, GND). The setup is now configured as is shown in
for PWR003.
8
bq24140, Fully Integrated, Dual-Input, Switch-Mode, One-Cell, Li-Ion Charger SLUU495A – October 2011 – Revised September 2012
With Full USB Compliance and USB-OTG Support EVM
With Full USB Compliance and USB-OTG Support EVM
Copyright © 2011–2012, Texas Instruments Incorporated