Analog Devices MAX25460 Manual page 4

MAX25460 Evaluation Kit
USB BC1.2 CDP Charging
12) In the GUI, set Cable Comp Gain to 108mΩ and set
Charge Detection to Auto_CDP.
13) Connect a USB cable and a BC1.2 CDP-compatible
smartphone.
14) Check that the smartphone is recognized on the host
computer and that it is charging.
15) V current can be checked by measuring the volt-
BUS
age drop across the current-sense resistor R1.
16) Unplug the smartphone and 2m USB-A extension
cable from the EV kit.
Figure 4. EV Kit Setup for Cable Compensation
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Evaluates: MAX25460
Cable Compensation
17) Connect the 2m USB-A extension cable to the EV kit
downstream USB connector (J3).
18) Connect the Type-A plug to the other end of the
extension cable (see
19) Measure the V voltage at the end of cable, it
BUS
should be around 5.15V.
• Note: This is the voltage at the portable device.
20) Connect the E-load or resistor bank to the USB
plug's Ground and V
BUS
21) Adjust the Cable Comp Gain in the GUI until the volt-
age at the far-end reaches 5.15V.
22) The voltage at the far-end of the 2m cable is regulated
to approximately 5.15V regardless of the load current.
Figure 4).
pins.
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