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General Description

The MAX17595 evaluation kit (EV kit) is a fully assembled

and tested circuit board that contains MAX17595 peak-

current-mode controller for a flyback regulator. The EV

kit is configured for an isolated 15V DC output voltage

that can supply up to 1.5A current. The line input voltage

range is from 85V AC to 265V AC or 120V DC to 375V

DC.

The EV kit demonstrates low quiescent current and effi-

ciency up to 86%. This high efficiency is achieved by

using a single-transistor (MOSFET) flyback converter

topology that operates at 120kHz switching frequency.

The surface-mount transformer has a tertiary winding to

power the IC after startup. An optocoupler, along with the

transformer, provides galvanic isolation up to 3500V

RMS

Warning: The EV kit is designed to operate with high

voltages. Dangerous voltages are present on this EV kit

and on equipment connected to it. Users who power up

this EV kit or the power sources connected to it must be

careful to follow safety procedures appropriately to work

with high-voltage electrical equipment.

Under severe fault or failure conditions, this EV kit may

dissipate large amounts of power, which could result in

the mechanical ejection of a component or of component

debris at high velocity. Operate this EV kit with care to

avoid possible personal injury.

Features

S 85V AC to 265V AC or 120V DC to 375V DC Input

Range

S 15V DC at 1.5A Isolated Output Voltage

Galvanic Isolation Up to 3500V

RMS

S 120kHz Switching Frequency

Efficiency Up to 86%

Low-Cost Flyback Design

Proven PCB Layout

Fully Assembled and Tested

DESIGNATION QTY DESCRIPTION

C1 1

0.1FF Q20%, 275V AC X2 plastic

film capacitor (17mm x 5mm)

Panasonic ECQ-U2A104ML

C2 1 0I Q5% resistor (0603)

C3, C12, C18 0

Not installed, ceramic

capacitors (0603)

C3 is short (PC trace);

C12, C18 are open

C4 1

56pF Q5%, 50V C0G ceramic

capacitor (0603)

Murata GRM1885C1H560J

C5 1

100FF Q20%, 450V aluminum

electrolytic capacitor

(25mm diameter)

Panasonic ECO-S2GP101CA

DESIGNATION QTY DESCRIPTION

C6, C21 2

0.47FF Q10%, 25V X7R ceramic

capacitors (0603)

Murata GRM188R71E474K

C7 1

0.1FF Q10%, 16V X7R ceramic

capacitor (0603)

Murata GRM188R71C104K

C8 1

1FF Q10%, 25V X7R ceramic

capacitor (0603)

Murata GRM188R71E105K

C9 1

4.7FF Q10%, 50V X7R ceramic

capacitor (1206)

Murata GRM31CR71H475K

C10 1

3300pF Q10%, 250V X7R

ceramic capacitor (0805)

Murata GRM21AR72E332K

MAX17595 Evaluation Kit

Evaluates: MAX17595 as Flyback Converter

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

Component List

19-6339; Rev 1; 4/13

Ordering Information appears at end of data sheet.

Summary of content (9 pages)

PAGE 1
MAX17595 Evaluation Kit Evaluates: MAX17595 as Flyback Converter General Description The MAX17595 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains MAX17595 peakcurrent-mode controller for a flyback regulator. The EV kit is configured for an isolated 15V DC output voltage that can supply up to 1.5A current. The line input voltage range is from 85V AC to 265V AC or 120V DC to 375V DC. The EV kit demonstrates low quiescent current and efficiency up to 86%.
PAGE 2
MAX17595 Evaluation Kit Evaluates: MAX17595 as Flyback Converter Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY 1 4.99kI Q1% resistor (0603) 1 1000pF Q10%, 50V X7R ceramic capacitor (0603) Murata GRM188R71H102K R6 C11 R7, R8, R17 0 Not installed, resistors (1206) R9 1 82.5kI Q1% resistor (0603) 22FF Q10%, 25V X7R ceramic capacitors (1210) Murata GRM32ER71E226K R10, R11, R23–R25, R27 0 Not installed, resistors (0603) R12 1 49.
PAGE 3
MAX17595 Evaluation Kit Evaluates: MAX17595 as Flyback Converter • Isolation transformer • Variac • Two voltmeters Quick Start Detailed Description of Hardware Required Equipment The MAX17595 EV kit evaluates MAX17595 off-line flyback converter operating in discontinuous-conduction mode (DCM), configured for a 15V DC, 1.5A output. Warnings: • Exercise Caution when connecting and measuring off-line voltages. • Voltage at the primary side can be as high as 700V DC.
PAGE 4
MAX17595 Evaluation Kit Evaluates: MAX17595 as Flyback Converter EN/UVLO and OVI PCB pads are available for monitoring the voltages present at the respective inputs. Soft-Start The EV kit provides an option to configure the circuit soft-start. Capacitor C7 configures the soft-start time (tSS) to 12ms. To reconfigure the soft-start time to a different value, use the following equation to choose a new C7 capacitor: = C7 8.2645 × t SS nF where tSS is in ms and C7 is in nF.
PAGE 5
AC2 SGND OVI EN/UVLO DITHER/SYNC SGND DITHER/SYNC VIN SGND R6 4.99k 1% R5 19.8k 1% R4 549k 1% R3 549k 1% R2 549k 1% C1 0.1uF 275VAC OVI EN/UVLO R7 OPEN R8 OPEN 2 3 L1 6.8mH 1 4 L1-1 D1 ~ - 1% R9 82.5k 2 DITHER/SYNC SGND 3 + 1 4 SGND C2 0ohm R11 OPEN R10 OPEN SGND ~ 4 3 2 1 + PGND C3 SHORT (PC TRACE) R12 49.9k 1% C4 56pF 50V C5 100uF 450V DITHER/SYNC RT SLOPE N.C. L1-1 VIN R14 402k 1% 1% R13 22k MAX17595 U1 SGND C21 0.
PAGE 6
MAX17595 Evaluation Kit Evaluates: MAX17595 as Flyback Converter 1.0” Figure 2. MAX17595 EV Kit Component Placement Guide—Component Side 1.0” Figure 3.
PAGE 7
MAX17595 Evaluation Kit Evaluates: MAX17595 as Flyback Converter 1.0” Figure 4.
PAGE 8
MAX17595 Evaluation Kit Evaluates: MAX17595 as Flyback Converter Ordering Information PART TYPE MAX17595EVKIT# EV Kit #Denotes RoHS compliant.
PAGE 9
MAX17595 Evaluation Kit Evaluates: MAX17595 as Flyback Converter Revision History REVISION NUMBER REVISION DATE DESCRIPTION 0 5/12 Initial release 1 4/13 Updated Component List, EV kit specifications, and Figure 1 PAGES CHANGED — 1–5 Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied.