max5995b evaluation kit - evaluates: max5995a/b/c/max5974d

Evaluates: MAX5995A/B/C/MAX5974DMAX5995B Evaluation Kit

General DescriptionThe MAX5995 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board featuring an Ethernet port, network powered-device (PD) interface controller circuit for -57V supply rail systems. The EV kit uses the MAX5995B IEEE® 802.3af/at/bt-compliant network PD interface controller in a 16-pin TQFN package with an exposed pad. The IC is used in Power-over-Ethernet (PoE) applications requiring DC power from an Ethernet network port for PDs such as VoIP phones, wireless access nodes, security cameras, lighting, and building automation.The EV kit receives power from IEEE 802.3af/at/bt-compliant power-sourcing equipment (PSE). Refer to the MAX5952, MAX5965A/MAX5965B, and MAX5980 IC data sheets for PSE controllers. The PSE provides the required -36V to -57V DC power over an unshielded twisted-pair Ethernet network cable to the EV kit’s RJ45 magnetic jack. The EV kit features a 1 x 1 Gigabit RJ45 magnetic jack and two active full-wave rectifiers (N101 and N102) for separating the DC power provided by an endspan or midspan Ethernet system.The EV kit can also be powered by a wall adapter power source. The EV kit provides PCB pads to accept the output of a wall adapter power source. When a wall adapter power source is detected, it always takes precedence over the PSE source and allows the wall adapter to power the EV kit.The EV kit demonstrates the full functionality of the IC, such as PD detection signature, PD classification signature, Multi-Event Classification (MEC), Intelligent MPS, inrush current control, input undervoltage lockout (UVLO), and DC-DC step-down converter. The step-down converter operates at a fixed 290kHz switching frequency and is configured for an isolated active-clamped forward topology with output voltage +12V DC that can deliver 5.5A of current.

Features ● IEEE 802.3af/at/bt-Compliant PD Interface Circuit ● Multi-Event Classification 0-8 ● -36V to -57V Input Range ● Demonstrates a 71W PD Design with Isolated Active-

Clamped Forward Topology DC-DC Converter ● +12V Output at 5.5A ● Startup Inrush Current Limit of 135mA (typ) ● Current Limit During Normal Operation ● Evaluates Endspan and Midspan Ethernet Systems ● Type 1-4 PSE Classification Indicator ● Simplified Wall Adapter Interface ● Demonstrates Sleep and Ultra-Sleep

Power-Saving Modes ● Proven PCB Layout ● Fully Assembled and Tested

319-100275; Rev 0; 11/18

Ordering Information appears at end of data sheet.

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 power the 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 kit with care to avoid possible personal injury.

IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc.

Click here for production status of specific part numbers.

https://www.maximintegrated.com/en/storefront/storefront.html

Maxim Integrated │ 2www.maximintegrated.com


Quick StartRequired Equipment

● MAX5995_EVKIT_A ● An IEEE 802.3af/at/bt compliant PSE and

a Category 5e Ethernet network cable ● -48V, 3A capable DC power supply ● Voltmeter

ProcedureThe EV kit is fully assembled and tested. Follow the steps below to verify board operation:Caution: Do not turn on the power supply until all connections are completed. 1) Use one of the following methods to power the EV kit:

a) If network connectivity is required: Connect a Category 5e Ethernet network cable from the EV kit input port RJ45 connector to the correspond-ing PSE Ethernet LAN connection that provides power to the EV kit.

b) If network connectivity is not required: Connect a -48V DC power supply between the -54V and GND PCB pads on the EV kit. Connect the power-supply positive terminal to the GND pad and the negative terminal to the -54V pad.

2) Activate the PSE power supply or turn on the external DC power supply.

3) Using a voltmeter, verify that the EV kit provides +12V across the VOUT and RTN PCB pads.

Detailed Description of Hardware (or Software)The MAX5995 EV kit features an Ethernet port and network PD interface controller circuit for -57V supply rail systems. The EV kit contains a IEEE® 802.3af/ at-compliant network PD interface controller in a 16-pin TQFN-EP package. The IC is used in PoL applications for powering PDs from an unshielded twisted-pair (UTP) Ethernet Category 5e network cable and PSE port using endspan or midspan Ethernet systems.The EV kit receives power from an IEEE 802.3af/ at-compliant PSE and a UTP cable connected to the EV kit’s RJ45 magnetic jack. The EV kit uses a 1 x 1 gigabit RJ45 magnetic jack and two active full-wave bridge power rectifiers to separate the -57V DC power sent by the PSE. The EV kit can accept power from an endspan or midspan PSE network configuration.

The EV kit can also accept power from a wall adapter power source. When a wall adapter power source is detected between the POWER+ and POWER- pads, the IC’s internal isolation switch disconnects, which allows the wall adapter to supply power to the EV kit. The EV kit demonstrates the full functionality of the IC such as PD detection signature, PD classification signa-ture, Multi-Event Classification (MEC), Intelligent MPS, inrush current control, and UVLO. Resistor R101 sets the PD detection impedance. Resistors R44 and R6 set the PD classification signatures.The EV kit’s integrated DC-DC step-down converter is configured for an isolated ACTIVE-CLAMPED forward converter topology with output voltage of +12V and provides up to 5.5A at the output while achieving up to 92.5%, 92.4% and 92% efficiencies for 42V/48V/57V input, respectively. The step-down converter operates at a fixed 290kHz switching frequency.

PD Class selection by Classification resistorsBy selecting the two external resistors connected to CLSA and CLSB pins, the power consumption requested by the PD can be defined. Table 1 shows the the RCLSA and RCLSB resistor values needed to set for PD class and the PD power consumption defined by standards. RCLSA sets classification current for the 1st and 2nd class Events for 0~4 class PD complaint with IEEE 802.3af/at standard, and RCLSB set classification current for the 3rd to 5th class event for 0~8 class PD complaint with IEEE 802.3bt standard.

IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc.

Table 1. PSE Type and PD Class with Classification Resistor RCLSA and RCLSB

PD CLASS POWER REQUESTED BY PD RCLSA RCLSB

0 12.95W 619 OPEN

1 3.84W 118 OPEN

2 6.49W 66.5 OPEN

3 12.95W 43.2 OPEN

4 25.5W 30.9 30.9

5 38.25W 30.9 619

6 51W 30.9 118

7 61W 30.9 66.5

8 71W 30.9 43.2



Wall Adapter Power Source (POWER+, POWER-) The EV kit can also accept power from a wall adapter power source. Use the POWER+ (0V) and POWER- (-10V to -57V) PCB pads to connect the wall adapter power source. The wall adapter power source operating-voltage range must be within +10V to +57V for the EV kit. When the wall adapter power source is above +10V it always takes precedence over the PSE source. Once the wall adapter power source is detected, the IC’s internal isolation switch disconnects. The wall adapter power is supplied to VDD through diode S210. Once it takes over, the classification process is disabled.When the wall adapter power source is below +8V, the PSE provides power through the IC’s internal isolation switch. Diode S210 prevents the PSE from back-driving the wall adapter power source when it is below +8V.

Undervoltage Lockout (UVLO)The EV kit operates up to a -57V supply with a turn-on UVLO threshold (VON) at -35.4V and a turn-off UVLO threshold (VOFF) at -30.0V. When the input voltage is above VON, the EV kit is enabled. When the input voltage goes below VOFF, the EV kit is disabled.

Sleep, Ultra-Sleep Modes and LED OperationThe EV Kit supports operating the MAX5995 in power saving modes such as the Sleep and Ultra Sleep. By using the SW3 DIP-switch, the SL pin could be driven low to enter the Sleep mode. The ultra-sleep mode could be entered by driving both SL and ULP pin to low (using DIP switch SW1, SW3). The device could be commanded to exit sleep or ultra-sleep mode by driving the WK pin low through the switch SW2.The device features a dedicated LED pin which can be programmed to source out current when the device is in MPS, sleep or ultra-sleep modes. Diode named LED con-nects between LED pin and VSS and lights up in green color to indicate LED current. The magnitude of the LED current can be controlled as per the value of the R105 resistor connected between the SL pin and VSS.

EV Kit Compliance to MAX5995A, MAX5995CBy default, the EV kit is installed with MAX5995B IC. However, the EV kit can also be used to evaluate the MAX5995A and MAX5995C variants of the IC without any change in schematic. Do note that for evaluating MAX5995C, the duty cycle of the MPS current is selectable through the choice of the resistor R40. This resistor should not be installed while evaluating MAX5995A, MAX5995B.



Note: Indicate that you are using the MAX5995 when contacting these component suppliers.

#Denotes RoHS compliant.

SUPPLIER WEBSITE

CoilCraft www.coilcraft.com

Comchip www.comchiptech.com

Diodes Incorporated www. diodes.com

Emerson Network Power www.vertivco.com

Fairchild Semiconductor www.onsemi.com

Kemet www.ir.kemet.com

Keystone www.keyelco.com

Lite-On Electronics www. us.liteon.com

Maxim Integrated www.maximintegrated.com

Murata www.murata .com

On Semiconductor www.onsemi.com

Panasonic www.panasonic.com

Pulse Electronics www.pulseelectronics.com

Renesas Technology Group www.renesas.com

Samsung Electronics www.samsung.com

Stackpole Electronics www.seielect.com

Sumida www.sumida.com

Taiyo Yuden www.yuden.co.jp

TDK www.us.tdk.com

TE Connectivity www.te.com

Texas Instruments www.ti.com

Vishay Dale www.vishay.com

Wurth Elektronik www.we-online.com

PART TYPE

MAX5995BEVKIT# EVKIT

Component Suppliers

Ordering Information



PART QTY DESCRIPTION

C1 11µF ±10%, 16V X7R ceramic capacitor (0805) Murata GRM21BR71C105KA01

C2, C11, C31, C36 4

100pF ±5%, 50V C0G ceramic capacitor (0603) Murata GRM1885C1H101JA01

C3, C5, C10 3

0.047µF ±10%, 50V X7R ceramic capacitor (0603) Tdk CGA3E2X7R1H473K080AA

C4, C32 20.01µF ±5%, 50V X7R ceramic capacitor (0603) Kemet C0603C103J5RAC

C6 11µF ±10%, 16V X7R ceramic capacitor (0603) Taiyo Yuden EMK107B7105KA

C7, C8, C13 3

2.2µF ±10%, 100V X7R ceramic capacitor (1210) Murata GRM32ER72A225KA35

C14 10.047µF ±10%, 500V X7R ceramic capacitor (1206) Vishay Vitramon VJ1206Y473KXEAT5Z

C15, C23, C25 3

0.1µF ±10%, 50V X7R ceramic capacitor (0603) Murata GCJ188R71H104KA12

C19 1220pF ±10%, 250V X7R ceramic capacitor (0603) Murata GRM188R72E221K

C21, C22, C24, C33,

C605

1000pF ±10%, 250V X7R ceramic capacitor (2211) Murata GA352QR7GF102KW01)

C26 1100µF ±20%, 16V X7R tantalum capacitor (7343) Panasonic 16TQC100MYF

C27-C30, C34 5

22µF ±10%, 16V X5R ceramic capacitor (1206) Samsung Electronics CL31A226KOCLFN

C38 133µF ±20%, 100V aluminium electrolytic capacitor (Case G) Panasonic EEE-FK2A330P

C39 14700pF ±10%, 50V X7R ceramic capacitor (0603) Murata GRM188R71H472KA01


C41 12200pF ±10%, 50V X7R ceramic capacitor (0603) Murata GRM39X7R222K50V

C45 12200pF ±10%, 2000V X7R ceramic capacitor (1206) Kemet C1206X222KGRAC

C56-C59 40.1µF ±10%, 100V X7R ceramic capacitor (0805) Murata GRM21BR72A104KAC4

C93, C105 20.1µF ±10%, 100V X7R ceramic capacitor (0603) Murata GCJ188R72A104KA01

C101 10.068µF ±5%, 100V C0G ceramic capacitor (1206) Tdk CGA5L1C0G2A683J160

D2, D3, D6, D7 4 Schottky Diode, 100V, 2A,

SMB Comchip CDBB2100-G

D9, D10, D12-D15 6 Diode, 250V, 0.25A, SOD-323 Diodes

Incorporated BAV21WS-7-F

D11 1 Zener Diode, 10V, 0.005A, SOD-323 Diodes Incorporated BZT52C10S-7-F


D17, D18 2 Rectifier bridge diode, 100V, 1.5A, SMT Diodes Incorporated DF1501S

D19 1 TVS Diode, 120V, 2A, SMA Diodes Incorporated SMAJ120A-13-F


D101 1 TVS Diode, 58V, 100A, SMB Diodes Incorporated SMBJ58A-13-F

D103 1 Schottky Diode, 100V, 2A, SMT Fairchild Semiconductor S210

D105-D108 4 Zener Diode, 12V, 0.005A, SOD-323 On Semiconductor MM3Z12VT1G

H1-H4 4 Standoff, 1/2 Inch, Female-Threaded, Hex, Aluminium Generic Part 2203

H5-H8 4

Phillips machine screw, 1/4 Inch, Stainless Steel Mcmaster-Carr; Keystone; Mcmaster-Carr 4C25MXPS; 9900;91772A106

MAX5995B EV Kit Bill of Materials




J1_DATA, J1_POWER 2

RJ45 Modular Jack Connector, Female, Through Hole, 8Pins Te Connectivity 5520252-4

L1 1Inductor; Ferrite, 1000µH ±20%, 0.125A, SMT Coilcraft LPS4018-105MR

L2 1 Inductor, Sheilded, 2.2µH ±20%, 6.0A, SMT Sumida CDMC6D28NP-2R2MC

L3 1Inductor, Sheilded, 4.7µH ±20%, 12.5A, SMT Sumida CDEP147NP-4R7MC-95

L4-L7 4Inductor, Ferrite-Bead, 220, Tol = ±25%, 2A, SMT Murata BLM18EG221SN1

L8-L15 8Inductor, Ferrite, 4.7µH ±20%, 1.10A, SMT (1008) Murata LQM2HPN4R7MG0

LED 1LED Diode, 2.1V, 0.03A, Green, SMT (1206) Lite-On Electronics Inc. LTST-C150GKT

N7 1 MOSFET N-channel, 150V, 26A, SO-8 Vishay Siliconix SI7430DP-T1-GE3

N9, N11 2 MOSFET N-channel, 100V, 60A, SO-8 Vishay Siliconix SIR882DP-T1-GE3

N12 1MOSFET P-channel, -150V, -8.9A, Powerpak1212-8 Vishay Siliconix SI7115DN-T1-GE3

N101, N102 2 MOSFET N-channel, 100V, 4.5A, SO-8 On Semiconductor FDS3992

Q1 1 Transistor NPN, 80V, 1A, SOT-89 Diodes Incorporated BCX5610TA

Q2 1 Transistor PNP, 40V, 0.6A, SOT-23 Fairchild Semiconductor MMBT4403

R1 1 316kΩ ±1% Resistor (0603) Vishay Dale CRCW0603316KFK

R2 1 100kΩ ±1% Resistor (0805) Panasonic ERJ-6ENF1003V

R3 1 1.5kΩ ±0.1% Resistor (0603) Panasonic ERA-3YEB152V

R4, R31, R33, R54 4 10kΩ ±0.1% Resistor (0603)

Vishay Dale TNPW060310K0BE

R5, R36 2 75kΩ ±0.1% Resistor (0603) Panasonic ERJ-PB3B7502


R6 1 115Ω ±1% Resistor (0603) Vishay Dale CRCW0603115RFK

R7 1 30kΩ ±1% Resistor (0603) Vishay Dale CRCW060330K0FK

R8, R79 2 0Ω ±5% Resistor (0603) Samsung Electronics RC1608J000CS

R9, R102, R104 3 0Ω ±0% Resistor (0603)

Vishay Dale CRCW06030000Z0


R11, R21, R23, R28 4 499kΩ ±1% Resistor (0402)

Panasonic ERJ-2RKF4993

R13, R41-R43 4 3Ω ±1% Resistor (0603)

Vishay Draloric CRCW06033R00FKEAHP

R15, R22, R27, R38 4 49.9kΩ ±1% Resistor (0402)

Vishay Draloric CRCW040249K9FKEDHP

R16 1 3.6kΩ ±1% Resistor (0603) Vishay Dale RK73H1J3601F

R17, R30 2 1kΩ ±0.1% Resistor (0603) Vishay Dale TNPW06031K00BE

R18 1 42.2kΩ ±0.1% Resistor (0805) TE Connectivity RN73C2A42K2B

R19 1 200kΩ ±1% Resistor (0603) Vishay Dale CRCW06032003FK



R25, R29 2 200Ω ±1% Resistor (0603) Vishay Dale CRCW06032000FK

R26 1 120kΩ ±1% Resistor (0603) Vishay Dale CRCW0603120KFK

R32 1 2kΩ ±1% Resistor (0603) Stackpole Electronics Inc. RNCP0603FTD2K00

R34 1 3.3kΩ ±1% Resistor (0603) Vishay Dale CRCW06033K30FK


R37 1 10Ω ±1% Resistor (0603) Vishay Dale CRCW060310R0FK

MAX5995B EV Kit Bill of Materials (continued)




R44 1 30.9Ω ±1% Resistor (0603) Vishay Dale CRCW060330R9FK

R45, R46 2 0.04Ω ±1% Resistor (1206) Vishay Dale WSL1206R0400F

R74-R77 4 75Ω ±5% Resistor (0805) Stackpole Electronics Inc. RMCF0805JT75R0




R108 1 100kΩ ±1% Resistor (0603) Vishay CRCW0603100KFK


RTN, VOUT 2 Banana Jack Connector, Straight, 1Pin

Emerson Network Power 108-0740-001

SW1-SW3 3 Surface Mount Switch SPST, 24V, 0.05A Omron B3FS-1000P

T1 1 Power Transformer, SMT-12 Pulse PA5318NL

T2 1LAN Transformer, Turns Ratio: 1:1, 350µH, 100Khz, SMD, Wurth Elektronik 7490220126

TP1, TP3, TP22 3 Black Test Point;

Dia 0.1Inch Keystone 5000

TP2, TP4 2 Red Test Point; Dia 0.1Inch Keystone 5001

TP7, TP10-TP12, TP17, TP25,

TP111

7 Orange Test Point; Dia 0.1Inch Keystone 5003

TP8, TP9, TP13-TP16, TP19, TP20

8 Blue Test Point; Dia 0.1Inch Keystone 5117

U1 1Powered Device, 802.3af/at/bt compliant, YQFN-16 Maxim MAX5995BETE+

U2, U6-U8 4Phototransistor Optocoupler, SMT Fairchild Semiconductor FOD817ASD


U3 1 Current-Mode Pwm Controller, TQFN-16 Maxim MAX5974DETE+

U4 1High Isolation Voltage Sop Photocoupler, SOP-4 Renesas Technology Corp. PS2801-1

U5 1 Adjustable Shunt Regulator, SOT-23 Texas Instruments TL432BIDBZ

-54V, CHASSIS-

GND, GND, J1,

POWER(+), POWER(-), RTN_PAD1, RTN_PAD2,

VOUT_PAD1, VOUT_PAD2

10 WEICO wire, 20Awg, 9020 BUSS

PCB 1 Pcb: MAX5995 Maxim MAX5995

C9, C12 02.2µF ±10%, 100V X7R ceramic capacitor (1206) Murata KRM31KR72A225KH01

C16, C17 0 Capacitor; Smt (1210); Open; Ipc Maximum Land Pattern N/A N/A

C18 00.1µF ±10%, 25V X5R ceramic capacitor (0402) Murata GRM155R61E104KA87

C35, C40, C42, C43 0 Capacitor; Smt (0603); Open;

Formfactor N/A N/A

C91 0 Capacitor; Smt (1206); Open; Ipc Maximum Land Pattern N/A N/A

C92 0 Capacitor; Smt (Caseg); Open; Ipc Maximum Land Pattern N/A N/A

D1, D4, D5, D8 0 Schottky Diode, 100V, 2A,

SMB Comchip CDBB2100-G

R12, R39, R47, R48,

R530 Resistor (0603) N/A N/A

R40 0 0Ω Resistor (0603) Vishay Dale CRCW06030000Z0

N101, N102 0 Transistor NPN, 100V, 3.5A, SO-8 On Semiconductor FDS89141

R5, R36 0 75kΩ ±0.1% Resistor (0603) Vishay Dale TNPW060375K0BE

MAX5995B EV Kit Bill of Materials (continued)



MAX5995B EV Kit Schematics

X X XX

17POW

ER1_

TRD2

-DA

TA1_

TRP2

-7

7490

2201

26

VC2B

5520

252-

455

2025

2-4

FDS3

992

499K

12V

FDS3

992

CDBB

2100

-G

12V

DNI

DNI

DNI

CDBB

2100

-GDN

I

DNI

-54V

DNI

2.2U

F

DNI

DNI

CDBB

2100

-G

BLM

18EG

221S

N1

BLM

18EG

221S

N1

BLM

18EG

221S

N1

VC3B

VC2A

4.7U

H

0.1U

F

CDBB

2100

-G

2.2U

F

VC4B

VC3B

-54V

1000

PF

DF15

01S

DF15

01S

1000

PF

VC2B

CDBB

2100

-G

VC1B

CDBB

2100

-G49

.9K

12V

-54V

49.9

K

VC4A

-54V

-54V

VC3A

1000

PF

BLM

18EG

221S

N1

4.7U

H

4.7U

H

VC3A

VC1A

0.1U

F

0.1U

F75

4.7U

H

VC2A

12V

499K

VC4A

75

499K

49.9

K49

9K

VC4B

4.7U

H

-54V

-54V

CDBB

2100

-G

75

0.1U

F

VC1A

1000

PF

75

CDBB

2100

-G

1000

PF

49.9

K

4.7U

H

4.7U

H

4.7U

H

VC1B

L4

12

L5

12

C16

L8

12

L9

12

L10

12

L11

12

C21

C22

J1_D

ATA

1 2 3 4 5 6 7 8

910

J1_P

OW

ER

1 2 3 4 5 6 8

910

C56

C57

C58

C59

R74

R75

R76

R77

C60

L12

12

L6

12

C24 C3

3

L13

12

L14

12

L15

12

C17

L71

2

CHAS

SIS-

GND

R15

R22

R11 R2

1

D105

AC

D106

AC

D2A

C

D3A

C

N101

78 56

2 41 3

D6A

C

D7A

C

R23

R27

D107

AC

R28

N102

78 56

2 41 3

D108

AC

R38

D1A

C

D4A

C

D5A

C

D8A

C

C12

C9

D17

124

3

D18

124

3

T2

12 3 45 6 78 9 1011 121314 151820 212223 24 19

VC3A

VC1A

VC2A

VC4A

16

G1

S2S1 G2

D2 D2D1 D1G

1

S2S1 G2

D2 D2D1 D1

87654321

SHIE

LD87654321

SHIE

LD

1:1

1:1

1:1

1:1

D2-

D2+

CD2

D1-

D1+

CD1

CX1

X1+

X1-

CX2

X2+

X2-

CX3

X3+

X3-

CX4

X4+

X4-

D4-

D4+

CD4

D3-

D3+

CD3

- +- +



MAX5995B EV Kit Schematics (continued)

X

17

16151413

12 11 10 9

8765

4321

U1

C18

R9

R40

TP8

TP9

34

21

U7

34

21

U6

34

21

U2

TP25

TP22

R6

TP11

1

C105

TP16

TP15

TP14

TP13

GND -54V

C AD101

C101

R101

J1

R108

POW

ER(-)C

AD1

03

POW

ER(+

)R1

09

TP20

TP19

34

21

U8

R107

R44

CA

LED

R105

4321

SW3

4321

SW2

4321

SW1

R104

R102

TP17

TP12

TP11

TP10

TP7

0

DNI

0

60.4

K

DNI

0.1U

F0

S210

0.1U

F

24.9

K

FOD8

17AS

D

-54V

0

-54V

-54V

-54V

100K

FOD8

17AS

D

FOD8

17AS

D

FOD8

17AS

D

-54V

OUT

49.9

K

PG

-54V

115

58V

0.06

8UF

30.9

24.9

K

LTST

-C15

0GKT

MAX

5995

BETE

+

43

21

EP

ULPVVK

SLLED

CLSA

MEC PG

WAD

RTNRTN

VSS

CLSB

NCVDD

DET

VSS43

21

43

21



MAX5995B EV Kit Schematics (continued)

X

121110 987

65 4321

T1

TP4

TP3

R41

C35

3

2

1

L3

32

41

U4

R47

R39 R4

8

TP1

VOUT

TP2

RTN

21

C26

C43

C42

C93

C34

C30

C29

C28

R25

R33

C41 R3

5

R32

C31

C32

R34

R37

R30

C40

R31

1

2 3

U5

2 3

1

Q2

R36

C A

D9

C23

C27

321

4

8765

N9

CA

D20

C A

D10

C A

D15

R43

R42

R24

R26

C25

R29

C A

D16 321

4

8765

N11

C14

C19

R12

321

4

8765

N12

R13

321

48765

N7

C13

CA

D12

21

L1

CA

D13

C8

21

L2

C91

C7

21

C38

21

C92

C1

R10

16 31011

13 746

17

14 1 215

8 9 512

U3

R54

CA

D14

C10

C A

D11

R20

R19

R8

C45

C A

D19

R46

R45

R16

C36

R17

C11

R18

C5C3

9

C15

32

1

Q1

C6 R1

R4 C2R3

R2

C3

R53

R5 C4

R7

R79

75K

75K

VCC

-54V

OUT

VOUT

PS28

01-1

PA53

18NL

1000

UH

42.2

K

0.04

DNI

T1_1

2-5

4VO

UT

RTN

VCC

1UF

DNI

0.04

7UF

VCC

100U

F

DNI

0.1U

F22

UF

0.1U

F0.

1UF

200

FB

FB

-54V

OUT

100P

F

3.6K

4.7U

H

T1_8

T1_8

3

N11_

GT1

_12

2.2U

F2.

2UF

1UF

DNI

0.1U

F

DNI

DNI

13K

PG

220P

F

51K

-54V

OUT

2.2U

F

10K

2200

PF

2K

200

30K

0

10K

22UF

108-

0740

-001

108-

0740

-001

VOUT

3

0

100P

F

3

N11_

G

10

3.3K

33UF

-54V

OUT

0.01

UF

10K

1K

22UF OPE

N

0.01

UF31

6K100K

0.04

7UF

0.04

7UF

0.04

7UF

200K

4700

PF

1.5K

1K

VOUT

510

MAX

5974

DETE

+

0.04

DNI

22UF

DNI

200

DNI

DNI

RTN

22UF

2.2U

H

VCC

-54V

OUT

3

100P

F DNI

VCC

100P

F

120K

10K

2200

PF

RTN

-54V

OUT

SD

G

S

D

G

SD G

SD

G

+

+

EP

SSDCLM

P

ENINAU

XDRV

NDRV

PGNDCS

CSSC

GND

FB

COM

PFF

B

RTDITH

ER/S

YNC

DT

B

EC

321

127

610 9

45

118

NC

2

1

+

E

BC



MAX5995 EV—Top Silkscreen

MAX5995B EV Kit PCB Layout Diagrams

1.0’’



MAX5995 EV—Top View

MAX5995B EV Kit PCB Layout Diagrams (continued)

1.0’’



MAX5995 EV—Level GND


1.0’’



MAX5995 EV—Level PWR


1.0’’



MAX5995 EV—Bottom View


1.0’’



MAX5995 EV—Bottom Silkscreen


1.0’’

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. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2018 Maxim Integrated Products, Inc. │ 17


REVISION NUMBER

REVISION DATE DESCRIPTION PAGES

CHANGED

0 11/18 Initial release —

Revision History

For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.

max5995b evaluation kit - evaluates: max5995a/b/c/max5974d

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