General Description
The MAX16831 evaluation kit (EV kit) demonstrates the
MAX16831 current-mode, high-brightness LED
(HBLED) driver IC. The MAX16831 EV kit is configured
as a step-down/step-up (buck-boost) topology circuit
with peak inductor current and average LED current
control for external LEDs. The MAX16831 EV kit oper-
ates from a DC supply voltage of 9V to 40V and is con-
figured to deliver 1A of current. The maximum output
voltage of the LED string can be up to 28V.
The MAX16831 EV kit can be configured for analog-
control PWM or digital PWM dimming operation using
either an analog linear DC voltage or a digital PWM
input signal to control the LEDs’ brightness. This EV kit
has an undervoltage lockout (UVLO) feature that dis-
ables the EV kit and overvoltage protection that pro-
tects the circuit under no-load conditions. The EV kit
circuit also features a clock output and features an
input for synchronizing to an external clock. The
MAX16831 EV kit is a fully assembled and tested sur-
face-mount printed-circuit board (PCB).
Caution: Do not power up the MAX16831 EV kit
without connecting a load to the LED+ and LED-
PCB pads.
Warning: Voltages exceeding 42V may exist on the
LED+ and LED- output pads.
Features
o
9V to 40V Wide Supply Voltage Range
o
1A Output Current
o
Analog-Control PWM Dimming
o
PWM Dimming Control
o
Output Overvoltage Protection
o
Buffered Clock Output
o
Lead-Free and RoHS Compliant
o
Fully Assembled and Tested
Evaluates: MAX16831
MAX16831 Evaluation Kit
________________________________________________________________
Maxim Integrated Products
1
19-1243; Rev 1; 10/08
Component List
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.
Ordering Information
PART
TYPE
MAX168
EV Kit
+
Denotes lead-free and RoHS-compliant.
DESIGNATION QTY
DESCRIPTION
C1, C3, C4,
C5, C15
5
0.1µF ±10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H104K
C2
1
1µF ±10%, 16V X7R ceramic
capacitor (0603)
Murata GRM188R71C105K
C6, C14
2
1000pF ±10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H102K
C7
1
10µF ±10%, 16V X7R ceramic
capacitor (1206)
Murata GRM31CR71C106K
C8
1
100µF ±20%, 50V electrolytic
capacitor (10.3mm x 10.3mm)
Panasonic EEVFCIH101P
C9
1
10µF ±10%, 50V X7S ceramic
capacitor (1210)
Taiyo Yuden UMK325C7106KM
C10, C11, C12
3
4.7µF ±10%, 100V X7R ceramic
capacitors (2220)
Murata GRM55DR61H106K
DESIGNATION QTY
DESCRIPTION
C13
1
0.047µF ±10%, 50V X7R ceramic
capacitor (0603)
TDK C1608X7R1H473K
C16, C17
2
100pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GQM1885C1H101J
D1
1
300mA, 100V diode (SOD123)
Diodes Inc. 1N4148W-7-F
D2
0
Not installed, diode (SOD123)
D3
1
3A, 100V Schottky diode (PowerDI)
Diodes Inc. PDS3100
D4
1
1A, 100V Schottky diode (SMA)
Diodes Inc. B1100-13-F
JU1
1
2-pin header
L1
0
Not installed, inductor
L2
1
10µH, 9.2A inductor
Sumida CDEP147NP-100MC-95
N1
1
60V, 3.2A n-channel MOS FET (6-pi n TSOP )
Vishay Si3458DV-E3