_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX16839 Evaluation Kit
Evaluates:
MAX16839
General Description
T
he MAX16839 evaluation kit (EV kit) demonstrates
three separate high-voltage, single-channel, linear high-
brightness LED (HB LED) drivers using the MAX16839
IC. This EV kit is configured to supply an HB LED current
of 100mA per channel and operates from a 5V to 40V
rated power supply providing up to 300mA. The EV kit
can withstand a 45V automotive load-dump condition.
An input switch is included to evaluate pulse-width-
modulation (PWM) driving with supply chopping.
The EV kit eases evaluation of the MAX16839 PWM
dimming-control feature by providing three indepen-
dent PWM inputs to all three channels. Each PWM input
accepts a digital signal up to 10kHz. Additionally, mul-
tiple EV kits can be cascaded by using the MAX16839
FLTS signals. An input common-mode choke is also
provided to facilitate EMI immunity testing.
Features
S
Three Independent Channels for Driving
High-Brightness LEDs
S
100mA LED Current per Channel
S
Three Independent PWM Inputs
S
PWM Dimming Control Up to 10kHz
S
Operates from a 5V to 40V Supply
S
Supply Input Chopper Circuit
S
Capability for Cascading Multiple Kits
S
Proven PCB and Thermal Design
S
Fully Assembled and Tested
Ordering Information
Component List
19-4942; Rev 1; 5/10
+
Denotes lead(Pb)-free and RoHS compliant.
*
EP = Exposed pad.
PART
TYPE
MAX168
EV Kit
DESIGNATION
QTY
DESCRIPTION
C1
1
1
F
F
Q
10%, 50V X7R ceramic
capacitor (0805)
Murata GRM21BR71H105K
C2, C3, C4
3
0.022
F
F
Q
10%, 50V X7R ceramic
capacitors (0805)
Murata GRM216R71H223K
C5, C6, C7
3
0.1
F
F
Q
10%, 50V X7R ceramic
capacitors (0805)
Murata GCM21BR71H104K
D1
1
60V, 1A Schottky diode (SMA)
Central Semi CMSH1-60M LEAD
FREE
(Top Mark: CS60M)
D2
1
15V
Q
5%, 250mW zener diode
(SOD523)
Central Semi CMOZ15V LEAD
FREE
(Top Mark: H0)
JU1, JU2, JU3
3
3-pin headers
JU4–JU11
8
2-pin headers
L1
1
80V, 500mA common-mode choke
TDK ZJYS81R5-2P24-G01
DESIGNATION
QTY
DESCRIPTION
P1
1
60V 1.25A p-channel MOSFET
(SOT23)
Fairchild FDN5618P
(Top Mark: 618)
Q1
1
65V 100mA npn transistor
(SOT23)
Central Semi BC846A TR
(Top Mark: 1A)
or
Fairchild BC846AMTF
(Top Mark: 8AA)
R1, R3, R5
3
4.12
I
Q
1% resistors (0603)
R2, R4, R6
3
2.05
I
Q
1% resistors (0603)
R7, R9, R10
3
10k
I
Q
5% resistors (1206)
R8
1
2.2k
I
Q
5% resistor (2010)
U1, U2, U3
3
Programmable LED current
regulators (6 TDFN-EP*)
Maxim MAX1
(Pkg. Code: T633+2)
—
11
Shunts (JU1–JU11)
—
1
PCB: MAX16839 EVALUATION
KIT+