General Description
The MAX5022 evaluation kit (EV kit) is a fully assembled
and tested 5W flyback-converter circuit board. The
power supply is configured for an isolated +5VDC output voltage that can supply up to 1A of current. The line
input voltage range is from 85VAC to 265VAC or
120VDC to 375VDC.
The MAX5022 EV kit demonstrates high efficiency up to
80% at 262kHz switching frequency. This high efficiency
is achieved by using a single transistor (MOSFET),
flyback-converter topology providing output power up to
5W. The surface-mount transformer has a tertiary winding to power the MAX5022 IC after startup. An optocoupler along with the transformer provide input-to-output
isolation up to 4500VDC.
Warning: The MAX5022 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
appropriate for working 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 component
debris at high velocity. Operate this kit with care to
avoid possible personal injury.
Features
♦ 85VAC to 265VAC or 120VDC to 375VDC Input
Range
♦ Isolated Output Voltage: +5VDC at 1A
♦ Input-to-Output Isolation Up to 4500VDC
♦ Fully Assembled and Tested
♦ Efficiency Up to 80%
♦ 2% Output Voltage Regulation Over Line and
Load
Evaluates: MAX5022
MAX5022 Evaluation Kit
________________________________________________________________ Maxim Integrated Products 1
19-2073; Rev 3; 4/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
Component List
PART TEMP RANGE IC PACKAGE
MAX5022EVKIT 0°C to +70°C 6 SOT23-6
DESIGNATION QTY DESCRIPTION
10.0µF ±20%, 400V aluminum
C1, C9 2
C2, C3 2
C4, C10 2
C5, C12 2
C6 1
electrolytic capacitors (12.5mm x
13.5mm)
Sanyo 400CV10FS
0.22µF ±20%, 50V X7R ceramic
capacitors (1206)
TDK C3216X7R1H224M
47µF ±20%, 6.3V aluminum organic
capacitors (case V)
Kemet A700V476M006AT018
0.01µF ±10%, 16V X7R ceramic
capacitors (0402)
TDK C1005X7R1C103K
0.1µF ±10%, 50V X7R ceramic
capacitor (0603)
TDK C1608X7R1H104K
DESIGNATION QTY DESCRIPTION
C7 1
C8 1
C11 1
C13 1
D1 1
1000pF ±20%, 4KVAC (DE0910)
Murata DE1E3KX102MA5BA01
8200pF ±10%, 50V X7R ceramic
capacitor (0603)
TDK C1608X7R1H822K
1000pF ±10%, 630V X7R ceramic
capacitor (1206)
TDK C3216X7R2J102K
2200pF ±10%, 50V X7R ceramic
capacitor (0402)
TDK C1005X7R1H222K
250mA, 75V high-speed switching
diode (SOT-23)
Central Semiconductor CMPD914
Evaluates: MAX5022
MAX5022 Evaluation Kit
2 _______________________________________________________________________________________
Component List (continued)
DESIGNATION QTY DESCRIPTION
3A, 40V Schottky power rectifier
D2 1
D3 1
D4 1
D5 1
F1 2
F1 1
L1, L3 2
L2 1
N1 1
R1, R2 2 360kΩ ±5% resistors (1206)
(SMC)
Central Semiconductor CMSH3-40
1000V, 1A full-wave diode bridge
(SMDIP)
Central Semiconductor CBR1-D100S
600V, 1A ultra-fast rectifier (SMA)
C entr al S em i cond uctor C M R1U - 06M
100V, 200mA small-signal diode
(SOD-123)
Fairchild Semiconductor MMSD4148
2AG and 5mm fuse clips
Keystone 3519
1/4A 250V SLO-BLO fuse
Littelfuse 229.250H
Ferrite beads 220Ω at 100MHz, 2A
DCR = 0.050Ω (0805)
Murata BLM21PG221SN1
470µH, 240mA inductor
Sumida CDRH73-471
1.8A, 600V, n-channel MOSFET
(DPAK)
Fairchild Semiconductor SSR2N60B
DESIGNATION QTY DESCRIPTION
R3 1 1.00kΩ ±1% resistor (0805)
R4 1 24.9kΩ ±1% resistor (0805)
R5 1 8.06kΩ ±1% resistor (0805)
R6 1 10Ω ±5% resistor (0603)
R7 1 1.78Ω ±1% resistor (1206)
R8 1 1.2kΩ ±5% resistor (1206)
R9 1 240kΩ ±5% resistor (0805)
R10 1 10Ω ±5% resistor (0805)
R11 1 1.5kΩ ±1% resistor (0603)
R12 1 100kΩ ±5% resistor (1206)
R13 1 100Ω ±5% resistor (0603)
TB1 1 2-point terminal block (0.2in center)
480µH (primary:secondary:tertiary
T1 1
U1 1 MAX5022EUT-T (6-pin SOT23)
U2 1
U3 1
— 4 Rubber bumpers
— 1 MAX5022 EV kit PC board
turns ratio 60:3:8) 5W transformer
Cooper Electronic Technologies
CTX03-15256
70V, 100% to 200% CRT
phototransistor (0.4in lead spacing)
Fairchild CNY17-3.W
1.24V precision shunt regulator
(SOT23-5L)
Texas Instruments TLV431AIDBV
Evaluates: MAX5022
MAX5022 Evaluation Kit
_______________________________________________________________________________________ 3
Quick Start
The MAX5022 EV kit is fully assembled and tested.
Follow these steps to verify board operation.
Warning: Exercise CAUTION when connecting and
measuring off-line voltages.
• Voltage at the primary side may be as high as
700VDC.
• Do not turn on the power supply until all connections are completed.
• Wear protective eye gear at all times.
• Do not touch any part of the circuit with bare hands
or conductive materials while power is applied.
• Make sure all high-voltage capacitors are fully discharged before handling.
Recommended Equipment
• Isolation transformer
• Variac
• Voltmeter
VOUT Setup Procedure
1) Connect the positive lead of a DC voltmeter to the
VOUT pad.
2) Connect the negative lead of a DC voltmeter to the
GND pad.
3) Make sure that the isolation transformer is not powered up. Connect the variac to the output of the isolation transformer.
4) Connect one lead of an AC voltmeter to the wiper
terminal of the variac.
5) Connect the other lead of the AC voltmeter to the
“common” terminal of the variac.
6) Set the output voltage of the variac to 0VAC.
7) Connect the wiper terminal of the variac to the L terminal of TB1.
8) Connect the “common” terminal of the variac to the
N terminal of TB1.
9) Connect a 50Ω 1W resistor across the output.
10) Power up the isolation transformer, and gradually
increase the voltage of the variac to 85VAC and up
to 265VAC.
11) Verify that VOUT is +5V throughout the input voltage range of 85VAC to 265VAC.
Note: Indicate that you are using the MAX5022 when contacting these component suppliers.
Component Suppliers
SUPPLIER PHONE FAX WEBSITE
Central Semiconductor 631-435-1110 631-435-1824 www.centralsemi.com
Cooper-Coiltronics 561-752-5000 561-742-1178 www.cooperet.com
Fairchild Semiconductor 888-522-5372 Local rep only www.fairchildsemi.com
Kemet 864-963-6300 864-963-6322 www.kemet.com
Keystone Electronics 800-221-5510 718-956-9040 www.keyelco.com
Littelfuse 847-824-1188 847-391-0894 www.littelfuse.com
Murata 770-436-1300 770-436-3030 www.murata.com
Sanyo Electronic Device 619-661-6835 619-661-1055 www.sanyodevice.com
Sumida USA 847-545-6700 847-545-6720 www.sumida.com
TDK 847-803-6100 847-390-4405 www.component.tdk.com
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