Maxim Integrated MAX16833 Evaluation Kit MAX16833EVKIT+ MAX16833EVKIT+ Data Sheet
Product codes
MAX16833EVKIT+
3
Maxim Integrated
Evaluates: MAX16833/MAX16833B
MAX16833 Evaluation Kit
Quick Start
Required Equipment
• MAX16833 EV kit
• 5V to 18V, 8A DC power supply
• A series-connected LED string rated at 1A
• Oscilloscope with a current probe
• 5V to 18V, 8A DC power supply
• A series-connected LED string rated at 1A
• Oscilloscope with a current probe
Procedure
The EV kit is fully assembled and tested. Follow the
steps below to verify the board operation. Caution: Do
not turn on power supply until all connections are
completed.
1) Verify that all jumpers (JU1, JU2, and JU3) are in
steps below to verify the board operation. Caution: Do
not turn on power supply until all connections are
completed.
1) Verify that all jumpers (JU1, JU2, and JU3) are in
their default positions, as shown in Table 1.
2) Connect the positive terminal of the DC supply to
the VIN pad and the negative terminal to the nearest
PGND pad.
PGND pad.
3) Connect the LED string across the LED+ and LED-
pads of the EV kit for buck-boost configuration (for
boost configuration, connect the LED string across
the LED+ and PGND pads of the EV kit. The LED
string voltage should be higher than the input volt-
age in this configuration).
boost configuration, connect the LED string across
the LED+ and PGND pads of the EV kit. The LED
string voltage should be higher than the input volt-
age in this configuration).
4) Clip the current probe on the wire connected to the
LED string.
5) Turn on the DC power supply.
6) Verify that the LEDs turn on.
7) Verify that the oscilloscope displays approximately
6) Verify that the LEDs turn on.
7) Verify that the oscilloscope displays approximately
1A.
*Default position.
Table 1. Jumper Descriptions (JU1, JU2, JU3)
JUMPER
SHUNT
POSITION
DESCRIPTION
JU1
1-2*
Connects the ICTRL pin of the MAX16833 to a voltage higher than 1.23V. The LED current level
is now using the internal reference. The shunt of JU2 must not be installed for proper operation.
is now using the internal reference. The shunt of JU2 must not be installed for proper operation.
Open
Disconnects the ICTRL pin of the MAX16833 from the external voltage-divider on the VCC pin.
Allows the user to apply an external voltage to set the LED current level.
Allows the user to apply an external voltage to set the LED current level.
JU2
1-2
Used only for the MAX16833B. For the MAX16833, this jumper is open. For the MAX16833B,
this allows adjustment of the voltage on the ICTRL pin by adjusting potentiometer R18.
this allows adjustment of the voltage on the ICTRL pin by adjusting potentiometer R18.
Open*
Disconnects the ICTRL pin of the MAX16833/MAX16833B from potentiometer R18. An external
voltage between 0 and 5.5V can be applied to the ICTRL pad.
voltage between 0 and 5.5V can be applied to the ICTRL pad.
JU3
1-2*
Install for the default position for both the MAX16833 and MAX16833B.
2-3
Allows dithering of the switching frequency to achieve spread spectrum for the MAX16833. The
shunt of JU2 must not be installed for proper operation.
shunt of JU2 must not be installed for proper operation.
Open
The voltage at the ICTRL pin of the MAX16833 is determined by the voltage at the ICTRL pad,
or if JU1 is installed, the voltage-divider R7 and R8.
or if JU1 is installed, the voltage-divider R7 and R8.