Daughterboard - Analog Devices EVAL-ADP1653EB Manual

DAUGHTERBOARD

ADP1653 EVAL BOARD
GND
VBAT
EN
STR
INT
SCL
SDA
Tx
VIC
REV 0.4.1
USE JP6 TO CONNECT
VIC (MOTHER BOARD) TO VBAT
(USEFUL WHEN NO SUPPLY
AVAILABLE MAX 300mA)
The ADP1653 evaluation daughterboard is designed to quickly
evaluate key parameters of the ADP1653 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 2 A capability
to VBAT. Up to 1.8 A (nominal) can be drawn from the battery;
therefore, short thick cables are recommended to minimize the
IR drops. A high current can cause a big IR drop, and VBAT can be
low enough to put the part into UVLO.
I
Q
I is the supply current and can be measured by using an
Q
ammeter across J8.
I
L
I is the inductor current and can be measured by using a current
L
loop across J1.
I
LED
I is the LED current and can be measured by using an
LED
ammeter or current loop across JP3.
V
IN
I
2.7V TO 5.5V, 2.0A SUPPLY
IN
OR BATTERY
USE THICK SHORT CABLES
VBAT GND
GND
C1
J7 SETT
J8 A
J1
SETF L1
J5
D1
R6
ADP1653
R5
R4
J4
C2 R1
R3
J3
SETI
C3
ILED
J6
2
I C
JP3
R2
HW
GND
USE JP3
TO SET HW
2
OR I C MODE
Figure 15. Daughterboard
Rev. A | Page 11 of 20
ANALOG DEVICES
OUT
D2
SHARP
J2
D3
D10
HPLED
GND
MEASURE I WITH
HPLED
CURRENT PROBE
High V LEDs
F
By default, R1 is 0 Ω. It can be replaced with another resistor
for current measurement or for increasing the OUT voltage (to
simulate a higher boost ratio for a high V
One-LED Evaluation
The J2 jumper can be placed to short D3 for the evaluation of
the one-LED solution.
2
HW Mode or I C
JP3 is used to select the hardware mode or I
the INTF pin to VBAT selects the hardware mode, whereas
shorting it to GND selects the I
Power Board from USB Port Only
To power the board via the USB without using an external
supply, short Jumper J6 on the daughterboard and short VIC to
5 V on JP13 on the motherboard. Figure 16 illustrates these two
jumpers. Ensure that the LED current is less than 200 mA to
avoid exceeding the 500 mA current limit of the USB.
EVAL-ADP1653EB
MEASURE I WITH
L
CURRENT PROBE
R1 CAN BE USED TO MEASURE
I OR INCREASE BOOST VOLTAGE
HPLED
TO SIMULATE HIGH V LED
F
CLOSE J2 FOR 1 LED
EVALUATION
LED).
F
2
C mode. Shorting
2
C mode.