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Maxim MAX16831 Quick Start Manual

Evaluation kit
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19-1243; Rev 1; 10/08

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.
DESIGNATION QTY
0.1µF ±10%, 50V X7R ceramic
C1, C3, C4,
5
capacitors (0603)
C5, C15
Murata GRM188R71H104K
1µF ±10%, 16V X7R ceramic
C2
1
capacitor (0603)
Murata GRM188R71C105K
1000pF ±10%, 50V X7R ceramic
C6, C14
2
capacitors (0603)
Murata GRM188R71H102K
10µF ±10%, 16V X7R ceramic
C7
1
capacitor (1206)
Murata GRM31CR71C106K
100µF ±20%, 50V electrolytic
C8
1
capacitor (10.3mm x 10.3mm)
Panasonic EEVFCIH101P
10µF ±10%, 50V X7S ceramic
C9
1
capacitor (1210)
Taiyo Yuden UMK325C7106KM
4.7µF ±10%, 100V X7R ceramic
C10, C11, C12
3
capacitors (2220)
Murata GRM55DR61H106K
________________________________________________________________ Maxim Integrated Products
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.
MAX16831 Evaluation Kit
DESCRIPTION
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

Ordering Information

PART
MAX16831EVKIT+
+ Denotes lead-free and RoHS-compliant.
DESIGNATION QTY
0.047µF ±10%, 50V X7R ceramic
C13
1
capacitor (0603)
TDK C1608X7R1H473K
100pF ±5%, 50V C0G ceramic
C16, C17
2
capacitors (0603)
Murata GQM1885C1H101J
300mA, 100V diode (SOD123)
D1
1
Diodes Inc. 1N4148W-7-F
D2
0
Not installed, diode (SOD123)
3A, 100V Schottky diode (PowerDI)
D3
1
Diodes Inc. PDS3100
1A, 100V Schottky diode (SMA)
D4
1
Diodes Inc. B1100-13-F
JU1
1
2-pin header
L1
0
Not installed, inductor
10µH, 9.2A inductor
L2
1
Sumida CDEP147NP-100MC-95
60V, 3.2A n-channel MOS FET (6-pi n TSOP )
N1
1
Vishay Si3458DV-E3
Features
TYPE
EV Kit
Component List
DESCRIPTION
1

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Summary of Contents for Maxim MAX16831

  • Page 1: General Description

    60V, 3.2A n-channel MOS FET (6-pi n TSOP ) C10, C11, C12 capacitors (2220) Vishay Si3458DV-E3 Murata GRM55DR61H106K ________________________________________________________________ Maxim Integrated Products 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.

  • Page 2: Quick Start

    847-803-6100 www.component.tdk.com Vishay 402-563-6866 www.vishay.com Note: Indicate that you are using the MAX16831 when contacting these component suppliers. Quick Start Warning: Voltages exceeding 42V may exist on the LED+ and LED- output pads. Recommended Equipment 1) Verify that a shunt is installed across jumper JU1 Before beginning, the following equipment is needed: (analog dimming control).

  • Page 3: Detailed Description

    Detailed Description LED Dimming Control The MAX16831 evaluation kit (EV kit) demonstrates the LED dimming can be achieved on the MAX16831 EV kit MAX16831 current-mode HBLED driver IC. The by applying a digital PWM signal or an analog DC volt- MAX16831 EV kit is configured in a step-down/step-up age at the DIM PCB input pad.
  • Page 4 125kHz to 500kHz square wave at the LED-. Refer to the Setting the Overvoltage Threshold RTSYNC PCB pad. Refer to the Oscillator, Clock, and section in the MAX16831 IC data sheet for setting the Synchronization section in the MAX16831 IC data overvoltage threshold.
  • Page 5 MAX16831 Evaluation Kit Figure 1. MAX16831 EV Kit Schematic _______________________________________________________________________________________...
  • Page 6 MAX16831 Evaluation Kit Figure 2. MAX16831 EV Kit Component Placement Guide—Components Side Figure 3. MAX16831 EV Kit PCB Layout—Component Side _______________________________________________________________________________________...
  • Page 7 MAX16831 Evaluation Kit Figure 4. MAX16831 EV Kit PCB Layout—GND Layer 2 Figure 5. MAX16831 EV Kit PCB Layout—VCC Layer 3 _______________________________________________________________________________________...
  • Page 8 MAX16831 Evaluation Kit Figure 6. MAX16831 EV Kit PCB Layout—Solder Side _______________________________________________________________________________________...

  • Page 9: Revision History

    Component C9 part number change. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

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