MAX16832CEVKIT+ Maxim Integrated Products, MAX16832CEVKIT+ Datasheet - Page 3

• Manufacturer Part Number: MAX16832CEVKIT+
• Description: KIT EVAL FOR MAX16832C LED DVR
• Manufacturer: Maxim Integrated Products

Specifications of MAX16832CEVKIT+

• Current - Output / Channel: 666mA
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 64V
• Features: Dimmable
• Voltage - Input: 6.5 ~ 65V
• Utilized Ic / Part: MAX16832
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1. Enable and HB LED Dimming
(Jumper JU1)
* Analog dimming can be achieved by placing a resistor
(RDIM) across the TEMP_I and PGND PCB pads. Remove the
shunt across jumpers JU1 and JU2, and then use the ILED
equation to calculate the current for the TEMP_I PCB pad
resistor, necessary to reduce the HB LED driving current. Refer
to the Analog Dimming section in the MAX16832A/MAX16832C
IC data sheet for information on the analog-dimming feature.
where RDIM is the TEMP_I pad resistor, ILED
required current for the desired HB LED current, and
ILED is configured for 666mA.
Alternatively, installing jumper JU2 and adjusting
potentiometer R2 can simulate analog dimming. Or, for
DC-control analog dimming, install jumper JU2 and
apply a DC voltage in the range of 0.7V to 2V at the
TP1 (positive) and TP2 (PGND) test points.
The MAX16832C EV kit features a thermal-foldback
and temperature-simulation circuit available at the
TEMP_I PCB pads and jumper JU2. Jumper JU2 sets
the mode of operation, temperature simulation, or ther-
mal foldback. Potentiometer R2 and resistor R3 form
the adjustable temperature-simulation circuit. Test
points TP1 and TP2 (PGND) provide access to the sig-
nal for adjusting the voltage.
POSITION
installed
installed
Installed
SHUNT
ILED
Not
Not
DIM
Thermal Foldback and Temperature
= ILED [1 - 0.75 x (2 - (RDIM x 26.5µA))]
VIN through R4
Connected to
Connected to
Connected to
PWM signal
DIM PIN
PGND
_______________________________________________________________________________________
Enabled or analog dimming*
(see Table 2)
Enabled, PWM signal applied
at DIM PCB pad
Disabled
DIMMING OPERATION
EV KIT ENABLE OR
Simulation
DIM
is the
MAX16832C Evaluation Kit
DIM
To evaluate the MAX16832C IC thermal-foldback fea-
ture, remove jumper JU2 and connect an NTC thermistor
to the TEMP_I and PGND PCB pads. Refer to the
Thermal Foldback section in the MAX16832A/
MAX16832C IC data sheet for information on using the
thermal-foldback feature. See Table 2 for configuring
jumper JU2 for the desired mode of operation.
Resistor R1 sets the MAX16832C EV kit average HB
LED current up to 666mA. However, the HB LED aver-
age current can be set up to 700mA after replacing
resistor R1. Use the following equation to calculate R1
when reconfiguring the HB LED current:
where I
Refer to the Selecting R
tion in the MAX16832A/MAX16832C IC data sheet for
information on setting the HB LED current.
Table 2. Temperature Simulation and
Thermal Foldback (Jumper JU2)
* Also analog dimming (see Table 1).
POSITION
Installed
installed
SHUNT
Not
LED
is the desired HB LED average current.
Setting External HB LED Current
Connected to
Connected to
external NTC
TEMP_I PIN
R2 and R3
thermistor
R
1
SENSE
=
0 2
I
LED
.
V
to Set LED Current sec-
Temperature simulation
EV KIT OPERATION
Thermal foldback*
3