Texas Instruments UCD3138LLCEVM-028 Manuale utente

Using the UCD3138LLCEVM-028

User's Guide

Literature Number: SLUU979A

August 2012–Revised July 2013

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WARNING

Always follow TI’s set-up and application instructions, including use of all interface components within their

recommended electrical rated voltage and power limits. Always use electrical safety precautions to help

ensure your personal safety and the safety of those working around you. Contact TI’s Product Information

Center http://support/ti./com for further information.

Save all warnings and instructions for future reference.

Failure to follow warnings and instructions may result in personal injury, property damage, or

death due to electrical shock and/or burn hazards.

The term TI HV EVM refers to an electronic device typically provided as an open framed, unenclosed

printed circuit board assembly. It is intended strictly for use in development laboratory environments,

solely for qualified professional users having training, expertise, and knowledge of electrical safety risks in

development and application of high-voltage electrical circuits. Any other use and/or application are strictly

prohibited by Texas Instruments. If you are not suitably qualified, you should immediately stop from further

use of the HV EVM.

1. Work Area Safety:

(a) Keep work area clean and orderly.

(b) Qualified observer(s) must be present anytime circuits are energized.

electronics are energized, indicating operation of accessible high voltages may be present, for the

purpose of protecting inadvertent access.

(d) All interface circuits, power supplies, evaluation modules, instruments, meters, scopes and other

related apparatus used in a development environment exceeding 50 VRMS/75 VDC must be

electrically located within a protected Emergency Power Off (EPO) protected power strip.

(e) Use a stable and non-conductive work surface.

(f) Use adequately insulated clamps and wires to attach measurement probes and instruments. No

freehand testing whenever possible.

2. Electrical Safety:

(a) De-energize the TI HV EVM and all its inputs, outputs, and electrical loads before performing any

electrical or other diagnostic measurements. Revalidate that TI HV EVM power has been safely de-

energized.

(b) With the EVM confirmed de-energized, proceed with required electrical circuit configurations, wiring,

measurement equipment hook-ups and other application needs, while still assuming the EVM circuit

and measuring instruments are electrically live.

WARNING: while the EVM is energized, never touch the EVM or its electrical circuits as they

could be at high voltages capable of causing electrical shock hazard.

3. Personal Safety:

(a) Wear personal protective equipment e.g. latex gloves and/or safety glasses with side shields or

protect EVM in an adequate lucent plastic box with interlocks from accidental touch.

4. Limitation for Safe Use:

(a) EVMs are not to be used as all or part of a production unit.

2SLUU979A–August 2012–Revised July 2013

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User's Guide

SLUU979A–August 2012–Revised July 2013

Digitally Controlled LLC Resonant Half-Bridge DC-DC

Converter

1 Introduction

This EVM, UCD3138LLCEVM-028 is to help evaluate the UCD3138 64-pin digital control device in an off-

line power converter application and then to aid in its design. The EVM is a standalone LLC resonant half-

bridge DC-to-DC power converter. The EVM is used together with its control card, UCD3138CC64EVM-

030, also an EVM on which is placed UCD3138RGC.

The UCD3138LLCEVM-028 together with UCD3138CC64EVM-030 can be used as they are delivered

without additional work, from either hardware or firmware, to evaluate an LLC resonant half-bridge DC-to-

DC converter. This EVM combination allows for some of its design parameters to be retuned using a GUI

based tool, called Texas Instruments Fusion Digital Power Designer. It is also possible to load custom

firmware with user’s own definition and development.

Three EVMs are included UCD3138LLCEVM-028, UCD3138CC64EVM-030, and USB-TO-GPIO.

This user’s guide provides basic evaluation instruction from a viewpoint of system operation in a

standalone LLC resonant half-bridge DC-to-DC power converter.

WARNING

• High voltages are present on this evaluation module during

operation and for a while even after power off. This module

should only be tested by skilled personnel in a controlled

laboratory environment.

• An isolated DC voltage source meeting IEC61010 reinforced

insulation standards is recommended for evaluating this EVM.

• High temperature exceeding 60°C may be found during EVM

operation and for a while even after power off.

• This EVM’s purpose is to facilitate the evaluation of digital

control in an LLC using the UCD3138, and cannot be tested

and treated as a final product.

• Extreme caution should be taken to eliminate the possibility of

electric shock and heat burn.

• Read and understand this user’s guide thoroughly before

starting any physical evaluation.

SLUU979A–August 2012–Revised July 2013 Digitally Controlled LLC Resonant Half-Bridge DC-DC Converter

Description

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2 Description

The UCD3138LLCEVM-028 along with the UCD3138CC64EVM-030 demonstrates an LLC resonant half-

bridge DC-DC power converter with digital control using the UCD3138 device. The UCD3138 device is

located on the UCD3138CC64EVM-030 board. The UCD3138CC64EVM-030 is a daughter card with

preloaded firmware that provides the required control functions for an LLC converter. For details of the

firmware please contact TI. UCD3138LLCEVM-028 accepts a DC input from 350 VDC to 400 VDC, and

outputs a nominal 12 VDC with full load output power of 340 W, or full output current of 29 A.

NOTE: This EVM does not have an input fuse and relies on the input current limit from the input

voltage source used.

2.1 Typical Applications

• Offline DC-to-DC Power Conversion

• Servers

• Telecommunication Systems

2.2 Features

• Digitally Controlled LLC Resonant Half-Bridge DC-to-DC Power Conversion

• DC Input from 350 VDC to 400 VDC

• 12 VDC Regulated Output from No Load to Full Load

• Full-Load Power 340 W, or Full-Load Current 29 A

• High Efficiency

• Constant Soft-Start Time

• Protection: Over Voltage, Over Current, Brownout and Output Short-Circuit Protection

• Test Points to Facilitate Device and Topology Evaluation

• Synchronous Rectification

• Automatic Mode Switching between LLC Mode and PWM Mode

• Cycle-by-Cycle Current Limiting with Duty Cycle Matching

• Constant Current and Constant Power Control Mode

• PMBUS Communication

• Current Sharing Capability (GUI Enable), Across Paralleled Units

4Digitally Controlled LLC Resonant Half-Bridge DC-DC Converter SLUU979A–August 2012–Revised July 2013

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Performance Specifications

3 Performance Specifications

Table 1. UCD3138LLCEVM-028 Performance Specifications

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

Input Characteristics

Voltage operation range 350 400 VDC

Input UVLO On 325

Input UVLO Off 310

Input current Input = 350 VDC, full load = 29 A 1.2 A

Input current Input = 380 VDC, full load = 29 A 1.1

Input current Input = 400 VDC, full load = 29 A 1.0

Output Characteristics

Output voltage, VOUT No load to full load 12 VDC

Output load current, IOUT 350 VDC to 400 VDC 29 A

Output voltage ripple 380 VDC and full load = 29 A 200 mVpp

Output over current Operation 10s then latch-off shutdown 30 A

Systems Characteristics

Switching frequency Resonant mode 35 150 kHz

PWM Mode 150

Peak efficiency 380 VDC, full load = 29 A 93.5%

Full-load efficiency 380 VDC, load = 20 A 94.0%

Operating temperature Natural convection 25 ºC

Firmware

Device ID (version) UCD3100ISO1 | 0.0.44.0000 | 120517

Filename UCD3138LLCEVM_028_0_0_44_120517.x0

SLUU979A–August 2012–Revised July 2013 Digitally Controlled LLC Resonant Half-Bridge DC-DC Converter

0.312V/A

Primary Current Sense

Output Capacitors

Load current sense

Diode Oring Control

R73 - 74 Bleeder R's

+Vout Ripple Test

+VOUT = +12VEXT

Iout = 29A max

SR gate drivers

1:1:1

1mV/1A

35A scaled to 1.6V

Output Current Sense

Current Share Compensation

+12V Monitoring and Protection

Parts not used.

+VIN = 350 to 400VDC.

Isolation Line

(J2-12)

(J3-11)

(J3-1)

(J3-2)

(J3-13)

(J2-36)

(J2-35)

(J2-14)

(J3-11)

(J3-4)

(J3-3)

(J3-25)

(J2-38)

Pout = 340W max

Pin_max = 340W

(J2-30)

Voltage Feedback

(J2-39)

(J2-40, 10)

Redundant OVP circuit.

J6: short to disable Ext OVP

(J3-11)

(J3-17)

3,4

7,8

TP10

R50

124

TP13

R46

D15

BAT54S

R48

TP11

R44

TP12

R49

R45

TP9

D14

BAT54S

R51

124

R47

HS1

HS2

C43

100pF

IRLB3036GPbF

Q10

IRLB3036GPbF

Q11

IRLB3036GPbF

C39

2.2nF

C36

15nF

C37

15nF

C38

15nF

C40

15nF

C41

15nF

C42

15nF

HS6 HS4

HS3

HS5

33uH

SPW20N60CFD

TP5

TP6

TP7

C31

1.5uF

C30

47uF

R74

C72

47uF

C71

47uF

C70

47uF

C69

47uF

R73

C68

47uF

1VDD

2RSET

3STAT

4FLTB

5OV

6UV

7GND 8

GATE

RSVD

FLTR

BYP

U11

TPS2411PW

R69

10k

R72

10k

R71

100k

R70

549

R66

10k

R67

R68

5.11k

C60

10nF

C57

2200pF C58

100pF

C59

100pF

C61

10nF J12

J11

Q15

Q14

TP16

TP17

TP20

C66

470uF

C65

470uF

C64

470uF

C63

470uF

R75 3m

R77 3m

R76 3m

C62

0.1uF

TP19

TP18 C73

4.7uF

SH2 SH3

SH1

TP14

C45

0.1uF

R58

10k

C44

2.2uF

1ENBA

2INA

3GND

4INB 5

OUTB

VDD

OUTA

ENBB

9PWPD

UCC27424DGN

C52

0.1uF

TP15

R64

10k

1ENBA

2INA

3GND

4INB 5

OUTB

VDD

OUTA

ENBB

9PWPD

U10

UCC27424DGN

C51

2.2uF

C28

2.2uF

C29

0.1uF

C34

2.2uF

1ENBA

2INA

3GND

4INB 5

OUTB

VDD

OUTA

ENBB

9PWPD

UCC27424DGN

1ENBA

2INA

3GND

4INB 5

OUTB

VDD

OUTA

ENBB

9PWPD

UCC27424DGN

R43

10k

R38

10k

R42

5.11k

R40

C32

0.1uF

C27

0.1uF

R37

5.11k

R35

R39 10

TP4

D10

TP8

D13

C33 2.2uF

R36

R41

D11

D12

C35

0.1uF

R17

R23

35.7k

R19

35.7k C13

220pF

C14

10nF

R22

C11

0.1uF

R18

C15

220pF

C12

0.1uF

R12

R11

R26

10k

R28

C20

2200pF

R27

100

R20 10k

R21

C16

2200pF

R16

100

TP2

TP3

C17

2200pF

R24 10k

R25

R13

549

R15

549

R14

549

R32

20k

R30

100

R33

R29

20k

R31

100

C26

0.1uF

R34

10k

Q4-A

Q4-B

SH4

J10

IPS

SR1 SR2

SR_VDS1 SR_VDS2

GND_PWR

AGND

HSG

HSS

LSG

GND_PWR_PRI

GND_PWR_PRI GND_PWR_PRI

TRP1

TRP2 GND_PWR

BUS+_HV_PRI

VIN_HV_PRI

GND_PWR_PRI

+12V

ORING_CTRL

GND_PWR DGND

+12VEXT

+12V

DGND

12VS

+12VEXT

12V_RTN

12VS

SR1

DPWM1A

GND_PWR

OVLATCH

SR2

DPWM1B

GND_PWR

DPWM0A

12VS

DPWM0B

GND_PWR

OVLATCH

GND_PWR

GND_PWR_PRI

3_3VA

IO_SENSE

IO_SEN-

IO_SEN+

EADC_IOSENSE

AGND

PWM0

AGND

VOSADC12

ORING_GATE

+VO_SENSE

-VO_SENSE

AGND

12V_RTN

AGND

+12VEXT

+12V

ORING_GATE

OVLATCH

3_3VD

+12V

DGND

EXT_OVP_DISABLE

Schematics

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4 Schematics

Figure 1. UCD3138LLCEVM-028 Schematic (image 1 of 2)

6Digitally Controlled LLC Resonant Half-Bridge DC-DC Converter SLUU979A–August 2012–Revised July 2013

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EAP1

12V_EXT

AD02

AD05

AD06

EAN1

EAN0

DPWM2B

DPWM1B

DPWM0B

DPWM3B

DPWM2A

DPWM1A

DPWM3A

DPWM0A

EAP0

FAULT0

EAN2

EAP2

AD10

AD13

AD12

AD11

AD09

AD08

AD07

AD04

AD03

AD00

AD01

SYNC

PWM_0

PWM_1

TCAP

SCI_TX0

SCI_RX0

INT_EXT

/RESET

SCI_TX1

SCI_RX1

3.3V

DGND

AGND

ADC_EXT

FAULT3

FAULT2

DGND

NC AGND

AGND

FAULT1

Control Card Connectors (PWR030)

DGND/AGND Damping

DGND Test Point

SCI Interface

V+ = +5.4V

V- = -5.4V

PFC Communication

On/off control

Device Address

I Share Bus

Temperature Sensor

Temperature =

SR body diode conduction detection circuits

Leading edge blanking pulse

External Power Input

Bias power generation

3.3VD LED Indicator

VAUX_P = +12V

VIN_MON=1.93V AT VIN=400V

VIN Operating Range: 300V to 400VDC.

Leading edge blanking pulse

Parts not used.

Isolation Line

(J2-22)

(J2-24)

(J2-28)

(J3-24)

(J3-23)

(J3-22)

(J2-8)

(J2-4)

(J3-32)

(J3-31)

(J3-33)

(J3-34) (J3-15) (J3-26)

(J3-5)

(J3-6)

159.6 C - TEMP * 85.5 C/V

OFF

12Vp_on

(J2-6, 16)

R5 10

TP1

C24

0.1uF

C22

0.1uF

C23

0.1uF C25

0.1uF

C21

0.1uF

1EN

2C1+

3V+

4C1-

5C2+

6C2-

7V-

8RIN 9

ROUT

INVALID

DIN

FORCEON

DOUT

GND

VCC

FORCEOFF

SN65C3221PW

0.1uF

R9 5.11k

SW1

R10 C10

10nF

C18

10nF

C19

10nF

GND

4V+

5GND

LM20BIM7

R55 51.1

D19

C47

100pF

R52

R54

3.01k

R57

301

C49

100pF

R53

C48

R56 10k

C46

0.01uF

C50

0.1uF

D16

Q12

D18

D17

8U8-A

BAT54S

301

1uF

1.74k

0.1uF

R3 1

0.1uF

2.2uF

0.1uF

1IN

2NC

3NC

4GND 5

FB/NC

OUT

9PWPD

TPS715A33DRBR

VIN+

VAUX_P

-VAUX_-VIN

-VIN

GND

VIN_MONITOR

VAUX_S

U1 PWR050

R62 51.1

D23

C54

100pF

R59

R61

3.01k

R65

301 C56

100pF

R60

C55

R63 10k

C53

0.01uF

D20 D21

D22

Q13

U8-B

301

D4 D5

111

ADDRESS

EADC_IOSENSE

+VO_SENSE

DPWM0A

DPWM1A

OVLATCH

P_GOOD

SCI_TX0

AC_P_FAIL_IN

12VS

DPWM0B

DPWM1B

ON/OFF

AC_P_FAIL_OUT

3_3VD

SCI_RX0

+VO_SENSE

DPWM2A

DPWM2B

SRDET1

SRDET2

-VO_SENSE

IPS

SCI_RX1

VIN_MON

DGND

IO_SENSE

ISHARE

TEMP

PWM0

SCI_TX1

EXT_OVP_DISABLE VIN_MON

VOSADC12

ORING_CTRL

FAILURE IO_SEN-

IO_SEN+

AGND

DGND AGND

3_3VD

DGND

SCI_RX1

SCI_TX1

3_3VD

SCI_RX0

SCI_TX0

DGND

AC_P_FAIL_IN

3_3VD

ON/OFF

DGND

ADDRESS

AGND

ISHARE

AGND

TEMP

3_3VA

AGND

3_3VD

SR_VDS1 SRDET1

DPWM2A

AGND

DGND

GND_PWR

DGND

3_3VD

VAUX_P

12VS 3_3VA

VIN_MON

GND_PWR_PRI

GND_PWR

GND_PWR AGND

DGND

AGND

3_3VD

DGND

BUS+_HV_PRI

3_3VD

SR_VDS2

SRDET2

DPWM2B

AGND

DGND

GND_PWR

AC_P_FAIL_OUT

FAILURE P_GOOD

3_3VD

DGND

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Schematics

Figure 2. UCD3138PFCEVM-026 Schematic (image 2 of 2)

SLUU979A–August 2012–Revised July 2013 Digitally Controlled LLC Resonant Half-Bridge DC-DC Converter

RESET

Parts not used

1111

111

R14

1.5K

TP2

TP3

TP1

TP6

TP22

TP11

TP23

TP8 TP9

TP10

TP4

TP7

TP16

TP12 TP13

TP14 TP15

TP17 TP18

TP19 TP20

TP21 TP24

TP25

TP26 TP27

TP28

TP29

TP32

TP33

TP34

TP35 TP36

TP30

TP31

BAT54A

C31

1000pF

C30

1000pF

C28

1000pF

C29

1000pF

C26

1000pF

C27

1000pF

C24

1000pF

C25

1000pF

C22

1000pF

C23

1000pF

C20

1000pF

C21

1000pF

C18

1000pF

C19

1000pF

C14

1000pF

100pF

1000pF

C17

33pF

C15

33pF

C16

33pF

C9 33pF

C10 33pF

0.1uF

1uF

C11

0.1uF

C12

2.2uF

1uF

C13

0.1uF

R13

1.5K

R12

1.65K

R9 100

R8 100

R7 100

R5 100

R1 R2 R4

R11 16K

R10

10K

R15

100K

R16 100

R17 100

R18 100

R20 100

R19 100

R25 100

R23 100

R26 100

R24 2K

R21 2K

R22 2K

R27 2K

R28 2K

R29 2K

NS1

1AGND

2AD13

3AD12

4AD10

5AD07

6AD06

7AD04

8AD03

V33DIO

10 DGND

RESET

ADC_EXT

SCI_RX0

SCI_TX0

15 PMBUS_CLK

16 PMBUS_DATA

DPWM0A

DPWM0B

DPWM1A

DPWM1B

DPWM2A

DPWM2B

DPWM3A

DPWM3B

25 DGND

SYNC

27 PMBUS_ALERT

28 PMBUS_CTRL

SCI_TX1

SCI_RX1

31 PWM0

32 PWM1

33 DGND

INT_EXT

FAULT0

FAULT1

TCK

TDO

TDI

TMS

TCAP

FAULT2

FAULT3

44 DGND 45

V33DIO

BP18

V33D

48 AGND

49 AGND

50 EAP0

51 EAN0

52 EAP1

53 EAN1

54 EAP2

55 EAN2

56 AGND

V33A

58 AD00

59 AD01

60 AD02

61 AD05

62 AD08

63 AD09

64 AD11

65 PWPD

UCD3138RGC

TP5

R39 10

AD-00

SCI-RX1

SCI-TX1

SCI-TX0

SCI-RX0

EXT-TRIG

DPWM-2B

DPWM-2A

DPWM-1B

DPWM-1A

DPWM-0B

DPWM-0A

/RESET

TMS

TDI

TDO

TCK

PWM-1

PWM-0

AD-06

AD-05

AD-04

AD-03

AD-00

EADC-N1

EADC-P1

EADC-N0

DGND

AD-02

AD-07

DPWM-3A

DPWM-3B

EADC-P2

EADC-N2

SYNC

FAULT-0

TCAP

AD-09

AD-10

AD-12

AD-13

EADC-P0

AD-08

AD-01

AD-11 FAULT-3

FAULT-2

FAULT-1

DGND

/RESET

DGND

INT-EXT

DGND

PMBUS-CTRL

PMBUS-CLK

PMBUS-ALERT

PMBUS-DATA

3.3VD

DGND

3.3VA

AGND

AGND DGND

Schematics

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Figure 3. UCD3138CC64EVM-030 Schematic (image 1 of 2)

8Digitally Controlled LLC Resonant Half-Bridge DC-DC Converter SLUU979A–August 2012–Revised July 2013

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If needed, use this jumper

to provide 3.3VD to application board

PPPN202FJFN

GND

5FB/NC

6NC

7NC

8OUT

9PWPD

TPS715A33DRBR

TP37

C33

10uF

C32

1uF

R31

301

R30

0.5

R35

10K

R32

10K

R33

10K

R37 10K

R38 10K

R34

R36

C34

0.1uF

EADC-N2

EADC-N1

EADC-N0

EADC-P0

EADC-P1

EADC-P2

AD-00

AD-01

AD-02

AD-03

AD-04

AD-05

AD-06

AD-07

AD-08

AD-09

AD-10

AD-11

AD-12

AD-13

DPWM-0A

DPWM-1A

DPWM-2A

DPWM-3A

FAULT-0

SYNC

FAULT-2

SCI-TX1

PWM-0

TCAP

SCI-TX0

INT-EXT

+12V_EXT

DPWM-0B

DPWM-1B

DPWM-2B

DPWM-3B

FAULT-3

SCI-RX1

PWM-1

SCI-RX0

EXT-TRIG

/RESET

3.3VD

TMS

TDI

TDO

TCK

DGND

+12V_EXT

FAULT-1

3.3VD

DGND

AGND

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Schematics

Figure 4. UCD3138CC64EVM-030 Schematic (image 2 of 2)

SLUU979A–August 2012–Revised July 2013 Digitally Controlled LLC Resonant Half-Bridge DC-DC Converter

VM1

VM2

VINDC1

LOAD1

UART 1 (J5)

SW1

Test Setup

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5 Test Setup

5.1 Test Equipment

DC Voltage Source: capable of 350 VDC to 400 VDC, adjustable, with minimum power rating of 400 W, or

current rating not less than 1.5 A, with current limit function. The DC voltage source to be used should

meet IEC61010 safety requirements.

DC Multimeter: One unit capable of 0-VDC to 400-VDC input range, four digits display preferred; and one

unit capable of 0-VDC to 15-VDC input range, four digits display preferred.

Output Load: DC load capable of receiving 0 VDC to 15 VDC, 0 A to 30 A, and 0 W to 360 W or greater,

with display such as load current and load power.

Current-meter, DC, optional in case the load has no display, one unit, capable of 0 A to 30 A. A low ohmic

shunt and DMM are recommended.

Oscilloscope: capable of 500-MHz full bandwidth, digital or analog, if digital 5 Gs/s or better.

Fan: 200 LFM to 400 LFM forced air cooling is recommended, but not a must.

Recommended Wire Gauge: capable of 30 A, or better than number 14 AWG, with the total length of

wire less than 8 feet (a four foot input and a four foot return).

5.2 Recommended Test Setup

Figure 5. UCD3138LLCEVM-028 Recommended Test Set Up

10 Digitally Controlled LLC Resonant Half-Bridge DC-DC Converter SLUU979A–August 2012–Revised July 2013

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