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MAX17127 Evaluation Kit

Evaluates: MAX17127

General Description

The MAX17127 evaluation kit (EV kit) is a fully assembled

and tested surface-mount PCB that evaluates the high-

efficiency MAX17127 white LED (WLED) driver. The EV

kit utilizes a step-up DC-DC converter to generate the

voltage required to drive up to six strings of 10 surface-

mount WLEDs. The EV kit uses a 5V to 26V input power

supply and can be configured to provide an adjustable

10mA to 30mA full-scale LED current.

Features

S 5V to 26V Input Range

S WLED Drives Up to 30mA/String

S Drives Six Strings of 10 WLEDs

S Full-Scale LED Current Adjustable from 10mA to

30mA

S 1MHz PWM Switching Frequency Adjustable from

250kHz to 1MHz (Component Change Required)

S All Components < 1mm Height

S Fully Assembled and Tested

Ordering Information

19-5449; Rev 0; 7/10

+Denotes lead(Pb)-free and RoHS compliant.

Component List

PART TYPE

MAX17127EVKIT+ EV Kit

DESIGNATION QTY DESCRIPTION

C1 1

0.1FF Q10%, 50V X7R ceramic

capacitor (0603)

Murata GRM188R71H104K

TDK C1608X7R1H104K

C2–C8,

C10–C16, C24

Not installed, ceramic capacitors

(0603)

C9 1

510pF Q5%, 50V C0G ceramic

capacitor (0603)

Murata GRM1885C1H511J

AVX 06035A511JA12A

C17 1

1FF Q10%, 10V X7R ceramic

capacitor (0603)

Taiyo Yuden LMK107BJ105KA

Murata GRM188R71A105K

C18, C22, C23 0

Not installed, ceramic capacitors

(1206)

C19, C21 2

2.2FF Q20%, 50V X7R ceramic

capacitors (1206)

Murata GRM31CR71H225K

C20 1

4.7FF Q10%, 25V X5R ceramic

capacitor (1206)

Murata GRM319R61E475K

DESIGNATION QTY DESCRIPTION

D1 1

0.7A, 60V Schottky diode

(US Flat)

Toshiba CUS04

D2–D61 60

White LEDs

Nichia NSSW008CT-P1

OPTEK OVSRWACR6

JU1, JU6,

JU8–JU12

7 3-pin headers

JU2 0

Not installed, 2-pin header—

short PC trace

JU7 0

Not installed, 3-pin header

(pins 2-3—short PC trace)

JU4,

JU13–JU19,

JU20, JU21

10 2-pin headers

L1 1

10FH, 1.2A power inductor

Sumida CR6D09HPNP-100MC

TDK VLP6810T-100M1R2

R1, R8, R10 3

100kI Q5% resistors (0603)

R2 1

1MI Q5% resistor (0603)

R3 1

0I Q5% resistor (0603)

R4 1

10kI Q5% resistor (0603)

Summary of content (9 pages)

PAGE 1
9-5449; Rev 0; 7/10 MAX17127 Evaluation Kit The MAX17127 evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB that evaluates the highefficiency MAX17127 white LED (WLED) driver. The EV kit utilizes a step-up DC-DC converter to generate the voltage required to drive up to six strings of 10 surfacemount WLEDs. The EV kit uses a 5V to 26V input power supply and can be configured to provide an adjustable 10mA to 30mA full-scale LED current.
PAGE 2
Evaluates: MAX17127 MAX17127 Evaluation Kit Component List (continued) DESIGNATION QTY R5 1 82.5kI Q1% resistor (0603) R6 1 2.21MI Q1% resistor (0603) R7 1 71.5kI Q1% resistor (0603) R11 0 R12 R14 DESIGNATION DESCRIPTION QTY DESCRIPTION U1 1 Six-string WLED driver (20 TQFN-EP*) Maxim MAX17127ETP+ Not installed, resistor (0603) — 17 Shunts 0 Not installed, multiturn potentiometer — 1 PCB: MAX17127 EVALUATION KIT+ 2 500kI multiturn potentiometer *EP = Exposed pad.
PAGE 3
MAX17127 Evaluation Kit Off-Board WLED String Configuration The EV kit can also be used to drive off-board WLED strings. To evaluate external WLED strings, reconfigure shunts from jumpers JU1 and JU8–JU12. See Table 2 for jumpers JU1 and JU8–JU12 configuration and Table 3 for jumper JU13 configuration. Removing these jumpers effectively disconnects the on-board WLED strings between the output and feedback pins, allowing the connection of external WLED strings.
PAGE 4
Evaluates: MAX17127 MAX17127 Evaluation Kit Table 5. Jumper Function (JU20) SHUNT POSITION PWM PIN PWM DUTY CYCLE OF LED CURRENT Installed Connected to AGND Zero Not installed* Connected to VDDIO through R2 Maximum (100%) Not installed Connect to an external PWM signal (0.1kHz to 25kHz) Follows the signal applied at PWM pad Table 6. Jumper Function (JU6) SHUNT POSITION ISET PIN ILED(MAX) 1-2* Connected to AGND through R8 and R14 Adjustable from 10mA to 30mA 2-3 Connected to AGND 0.
PAGE 5
MAX17127 Evaluation Kit Evaluates: MAX17127 Figure 1.
PAGE 6
Evaluates: MAX17127 MAX17127 Evaluation Kit 1.0’’ Figure 2.
PAGE 7
MAX17127 Evaluation Kit Evaluates: MAX17127 1.0’’ Figure 3.
PAGE 8
Evaluates: MAX17127 MAX17127 Evaluation Kit 1.0’’ Figure 4.
PAGE 9
MAX17127 Evaluation Kit REVISION NUMBER REVISION DATE 0 7/10 DESCRIPTION Initial release PAGES CHANGED — 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.