MAX16821BEVKIT+ Maxim Integrated Products, MAX16821BEVKIT+ Datasheet

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MAX16821BEVKIT+

Manufacturer Part Number
MAX16821BEVKIT+
Description
KIT EVAL FOR MAX16821B
Manufacturer
Maxim Integrated Products
Datasheets
1.MAX16821BATI.pdf (24 pages)
2.MAX16821BEVKIT.pdf (5 pages)

Specifications of MAX16821BEVKIT+

Current - Output / Channel
660mA
Outputs And Type
1, Non-Isolated
Voltage - Output
28V
Features
Dimmable
Voltage - Input
7 ~ 24V
Utilized Ic / Part
MAX16821
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX16821B evaluation kit (EV kit) is a fully assem-
bled and tested surface-mount printed-circuit board
(PCB) designed to evaluate the MAX16821B pulse-
width-modulation (PWM) LED driver controller in a
boost configuration.
The MAX16821B EV kit operates from a DC supply volt-
age of 7V to 24V. The EV kit’s output is configured to
deliver 660mA of current into series LED string with a
maximum forward voltage of 28V. The LED brightness
can be dimmed using a digital PWM signal.
The EV kit provides an option to configure the
MAX16821B IC’s overvoltage protection, switching fre-
quency, and frequency compensation. The MAX16821B
EV kit also features a clock output PCB pad to drive a
second LED current regulator out-of-phase.
19-1967; Rev 0; 11/07
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.
DESIGNATION
C1, C5, C6
C9, C10
C3, C4
C2
C7
C8
D1
QTY
________________________________________________________________ Maxim Integrated Products
3
1
2
1
1
2
1
10µF±10%, 50V X7S ceramic
capacitors (1210)
Taiyo Yuden UMK325BJHI06K
0.1µF±10%, 50V X7R ceramic
capacitor (1206)
Murata GRM319R71H104K
1000pF±10%, 25V X7R ceramic
capacitors (0603)
Murata GRM188R71E102K
0.022µF±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H223K
4.7µF±10%, 6.3V X7R ceramic
capacitor (0603)
Murata GRM188R70J475K
0.1µF±10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H104K
3A, 60V Schottky diode (SMA)
Diodes Inc. B360A-13-F
General Description
DESCRIPTION
MAX16821B Evaluation Kit
♦ 7V to 24V Input-Voltage Range
♦ 660mA Output Current
♦ Pulse-Width-Modulated LED Current Dimming
♦ Resistor-Adjustable Overvoltage Protection and
♦ Clock Output
♦ Fully Assembled and Tested
+ Denotes lead-free and RoHS-compliant.
DESIGNATION
Switching Frequency
R2, R5, R10
MAX16821BEVKIT+
N1–N4
N5
N6
L1
R1
R3
R4
R6
PART
QTY
1
4
1
1
1
3
0
1
1
Ordering Information
8.8µH, 4A inductor
Sumida CDEP105-8R8
60V, 115mA n-channel MOSFETs
(SOT23)
Central Semiconductor 2N7002
LEAD-FREE
40V, 4.9A n-channel MOSFET
(8-pin SO)
Vishay Si4446DY
60V, 3.2A n-channel MOSFET
(6-pin TSOP)
Vishay Si3458DV-E3
249kΩ ±1% resistor (0603)
10kΩ ±1% resistors (0603)
Not installed, resistor—shorted
(0603)
124kΩ ±1% resistor (0603)
0.007Ω ±2%, 0.5W sense resistor
(1206)
IRC LRC-LRF1206LF-01-R007-G
Component List
DESCRIPTION
TYPE
EV Kit
Features
1

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MAX16821BEVKIT+ Summary of contents

Page 1

... Output Current ♦ Pulse-Width-Modulated LED Current Dimming ♦ Resistor-Adjustable Overvoltage Protection and Switching Frequency ♦ Clock Output ♦ Fully Assembled and Tested Ordering Information PART MAX16821BEVKIT+ + Denotes lead-free and RoHS-compliant. DESIGNATION QTY 8.8µH, 4A inductor L1 1 Sumida CDEP105-8R8 60V, 115mA n-channel MOSFETs (SOT23) N1– ...

Page 2

MAX16821B Evaluation Kit DESIGNATION QTY DESCRIPTION 0.15 Ω ±1%, 0.5W sense resistor R7 1 (1206) IRC LRC-LRC1206LF-01-R150-F 1 Ω ±5% resistor (0603 Ω ±1% resistor (0603 2.49k Ω ±1% resistor (0603) R11 1 1.24k Ω ...

Page 3

LED Output Current The MAX16821B delivers 660mA into an LED string rated maximum of 28V. Resistor R7 sets the MAX16821B EV kit LED output current. Use the follow- ing equation to calculate R7 when reconfiguring the LED ...

Page 4

MAX16821B Evaluation Kit EN SGND OUTV LED+ R3 SHORTED R1 249kΩ VCC 1000pF 10kΩ R13 1% 1kΩ PWMDIM N2 R12 2 C10 1.24kΩ 0.1μ PWMDIM N4 R11 ...

Page 5

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5 © 2007 Maxim Integrated Products MAX16821B Evaluation Kit Figure 3. MAX16821B EV Kit PCB Layout— ...

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