Datasheet

EVAL-ADP8860
Rev. 0 | Page 16 of 24
DAUGHTERBOARD
07988-033
Figure 31. Daughterboard
The ADP8860 evaluation daughterboard is designed to quickly
evaluate key parameters of the ADP8860 IC. The board layout
footprint is extended so that parts can be exchanged easily, and
headers are available to measure currents using a current probe
or ammeter.
Connect a power supply or Li-Ion battery with 1 A maximum
current capability to VBATT (see Figure 29). Short thick cables
are recommended to minimize the IR drops. A high current can
cause a big IR drop, and VBATT can be low enough to put the part
into UVLO.
LK2, LK3, LK4, and LK5 enable 10 k pull-ups on nRST, nINT,
SDA, and SCL, respectively. The pull-ups are referred to as the
VDDIO supply.
Jumper JP6 must be installed in the PHS2 position if both
phototransistors are used. In addition, Jumper J16 in the
motherboard must be removed to disconnect LED6
from the second comparator input. In this configuration,
the ADP8860 supports only six LEDs. Make sure to set the
D6 Config checkbox in the GUI to enable the second
comparator (see Figure 15 and Figure 16).
Quiescent Current Measurement
The ADP8860 has only one supply line (VIN) coming from
the external supply. The input current can be measured by
removing Jumper LK6 and inserting a current meter across
the jumper.