MAX8790EVKIT+ Maxim Integrated, MAX8790EVKIT+ Datasheet

MAX8790EVKIT+

Manufacturer Part Number

MAX8790EVKIT+

Description

LED Lighting Development Tools

Manufacturer

Maxim Integrated

Series

MAX8790r

Datasheet

1.MAX8790EVKIT.pdf (11 pages)

Specifications of MAX8790EVKIT+

Rohs

yes

Product

Evaluation Kits

Current page: 1 of 11
Download datasheet (165Kb)

The MAX8790A evaluation kit (EV kit) is a fully assem-

bled and tested surface-mount PCB that evaluates the

high-efficiency MAX8790A white LED (WLED) driver.

The MAX8790A EV kit utilizes a step-up DC-DC con-

verter to generate the voltage required to drive up to six

strings of eight surface-mount WLEDs. The EV kit is

supply mode) and can be configured to provide a fixed

20mA or adjustable 15mA to 25mA full-scale LED cur-

rent. In addition, the MAX8790A provides LED current

control through either analog or digitally adjusted

pulse-width modulation (DPWM) dimming modes. As

shipped, the MAX8790A EV kit is configured for evalua-

tion with two strings of eight WLEDs.

19-0766; Rev 1; 3/08

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 QTY

C9, C10, C17

C1, C3, C4

C11–C16

C6, C8,

________________________________________________________________ Maxim Integrated Products

0.1µF ±10%, 50V X7R ceramic

capacitors (0603)

Murata GRM188R71H104K

TDK C1608X7R1H104K

1µF ±10%, 6.3V X5R ceramic

capacitor (0603)

Murata GRM188R60J105K

TDK C1608X5R1A105K

2.2µF ±10%, 50V X7R ceramic

capacitor (1206)

Murata GRM31CR71H225K

KEMET C1206C225K5RAC

Not installed, ceramic capacitors

(1206)

10µF ±10%, 25V X5R ceramic

capacitor (1206)

Murata GRM31CR61E106KA

TDK C3216X5R1E106K

Not installed, ceramic capacitors

(0603)

General Description

DESCRIPTION

MAX8790A Evaluation Kit

♦ 7V to 21V Input Range

♦ 86% Efficiency (VIN = 12V, Load = Two WLED

♦ WLED Drives Up to 25mA/String

♦ Drives Two Strings of Eight WLEDs (Capable of

♦ Analog or Direct DPWM Dimming Control

♦ 100:1 Dimming Range

♦ 750kHz PWM Switching Frequency (Selectable:

♦ Fully Assembled and Tested

+ Denotes lead-free and RoHS-compliant.

DESIGNATION QTY

Strings)

Driving Up to Six Strings)

1MHz or 500kHz, Component Change Required)

JU8–JU11,

JU5, JU12

JU1, JU3,

JU2, JU4,

D18–D49

JU6, JU7

D2–D17

JU13

MAX8790AEVKIT+

PART

Ordering Information

2A, 40V Schottky diode (M-Flat)

Toshiba CMS11 (TE12L, Q)

Nihon EC21QS04

White LEDs

Nichia NSSW008C

OPTEK OVSRWACR6

Not installed, white LEDs

3-pin headers

2-pin headers

Not installed, 3-pin headers

4.7µH, 2.15A, 64.1mΩ power inductor

TDK LTF5022T-4R7N2R0

Sumida CDRH5D16-4R7 (1.8mm)

60V, 2.8A n-channel MOSFET

(6 TSOP)

SANYO Semiconductor CPH6424

(Top Mark: ZA)

Fairchild Semiconductor FDC5612

(Top Mark: 562)

Component List

DESCRIPTION

TYPE

EV Kit

Features

Related parts for MAX8790EVKIT+

MAX8790EVKIT+ Summary of contents

Page 1

... TDK C3216X5R1E106K Not installed, ceramic capacitors C9, C10, C17 0 (0603) ________________________________________________________________ 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. MAX8790A Evaluation Kit ♦ 21V Input Range ♦ 86% Efficiency (VIN = 12V, Load = Two WLED Strings) ♦ ...

Page 2

MAX8790A Evaluation Kit DESIGNATION QTY DESCRIPTION R1 1 51kΩ ±5% resistor (0603 100kΩ potentiometer, multiturn R3 1 511kΩ ±1% resistor (0603 37.4kΩ ±1% resistor (0603 1MΩ ±1% resistor (0603) 56mΩ ±1%, 0.5W resistor (1206) ...

Page 3

The EV kit is populated with two strings of eight WLEDs, but provides four additional on-board strings to allow for the evaluation six total strings of eight WLEDs (48 total WLEDs). In addition, the EV kit can ...

Page 4

MAX8790A Evaluation Kit Table 4. Jumper JU4 Function SHUNT ISET PIN POSITION Installed Connected to VCC Connected to GND Not installed* through R1 and R2 * Default position. LED Dimming Mode The MAX8790A provides a 100:1 dimming range through analog ...

Page 5

Table 6. Jumpers JU6–JU11 Function SHUNT FB_ PIN POSITION Connected to cathode 1-2 of WLED string 2-3 Connected to GND Connect to an external Not installed WLED string Off-Board White LED String Configuration The MAX8790A EV kit is also used ...

Page 6

MAX8790A Evaluation Kit Figure 1. MAX8790A EV Kit Schematic 6 _______________________________________________________________________________________ ...

Page 7

Figure 2. MAX8790A EV Kit Component Placement Guide—Component Side _______________________________________________________________________________________ MAX8790A Evaluation Kit 7 ...

Page 8

MAX8790A Evaluation Kit Figure 3. MAX8790A EV Kit PCB Layout—Component Side 8 _______________________________________________________________________________________ ...

Page 9

Figure 4. MAX8790A EV Kit PCB Layout—Solder Side _______________________________________________________________________________________ MAX8790A Evaluation Kit 9 ...

Page 10

MAX8790A Evaluation Kit Figure 5. MAX8790A EV Kit Component Placement Guide—Solder Side 10 ______________________________________________________________________________________ ...

Page 11

... 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 ____________________ 11 © 2008 Maxim Integrated Products ...

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