Loopback PCB#

../../../../_images/Loopback_PCB.png

Fig. 246 Loopback PCB#

Source#

Revisions#

Rev01

General description#

This PCB is part of the ADC Loopback tutorial.

The LEDs indicate the state of the signals from the digital voltage card (Digital Voltage 3U 2v01). Furthermore eight of the signals (as documented in the section Signal description below) are first filtered and then output via the Ethernet connector to the ADC card (Analog LTC2311-16 3v01, Analog LTC2311-16 2vXX ).

../../../../_images/loopback_pcb_functional_areas.png

Fig. 247 Functional areas of the Loopback PCB#

Layout#

The PCB is structured by functional areas as shown in the Fig. 247 on the right.

  1. Connectors to the Digital Voltage Card

    • Connector 1: IPL1-115-01-L-D-K, top (green)

    • Connector 2: IPL1-120-01-L-D-K, left (blue)

  2. Pin header for measuring all signals

  3. Supply voltage state indicated by LEDs (3V3, 5V, 15V, 24V)

  4. State of gate signals indicated by LEDs

  5. State of remaining IOs indicated by LEDs

  6. Low pass filter for filtering the gate signals

  7. Ethernet connector to ADC Card

Signal description#

Since the matching of the signal names between the PCBs used in the Loopback Tutorial is not intuitive, the following table matches the signal names of the Digital Voltage Card to the signal names on the Loopback PCB and the ADC card. Additionally, the name of the corresponding LED as marked on the Loopback PCB is given.

Connector 1: IPL1-115-01-L-D-K#

Table 75 Signal matching of connector IPL1-115-01-L-D-K#

Pin

Digital voltage card

Loopback PCB

LED

ADC card

1

VIN

24V

24V

2

DIG_IO_P1

PWM_G1

LED_G1_D6

AIN_A_P4

3

DIG_IO_P2

PWM_G7

LED_G7_D6

AIN_B_P2

4

DIG_IO_P3

PWM_G2

LED_G2_D6

AIN_A_P3

5

DIG_IO_P4

PWM_G9

LED_G9_D6

6

DIG_IO_P5

PWM_G3

LED_G3_D6

AIN_A_P2

7

DIG_IO_P6

PWM_G10

LED_G10_D6

8

DIG_IO_P7

IO_P1

LED1_D5

9

DIG_IO_P8

IO_P2

LED2_D5

10

15V

15V

15V

11

DIG_IO_P9

IO_P3

LED3_D5

12

DIG_IO_P10

IO_P4

LED4_D5

13

DIG_IO_P11

IO_P5

LED5_D5

14

DIG_IO_P12

IO_P6

LED6_D5

15

DIG_IO_P13

IO_P7

LED7_D5

../../../../_images/net_names_dvc_IPL115.png

Fig. 248 Netnames of connector 1 (IPL1-115-01-L-D-K) on Digital voltage card#

../../../../_images/net_names_PCB_IPL115.png

Fig. 249 Netnames of connector 1 (IPL1-115-01-L-D-K) on Loopback PCB#

../../../../_images/net_names_dac.png

Fig. 250 Netnames of Ethernet connector on ADC card#

Connector 2: IPL1-120-01-L-D-K#

Table 76 Signal matching of connector IPL1-120-01-L-D-K#

Pin

Digital voltage card

Loopback PCB

LED

ADC card

1

VIN

24V

24V

2

DIG_IO_P14

PWM_G4

LED_G4_D6

AIN_A_P1

3

DIG_IO_P15

PWM_G8

LED_G8_D6

AIN_B_P1

4

DIG_IO_P16

PWM_G5

LED_G5_D6

AIN_B_P4

5

DIG_IO_P17

PWM_G11

LED_G11_D6

6

DIG_IO_P18

PWM_G6

LED_G6_D6

AIN_B_P3

7

DIG_IO_P19

PWM_G12

LED_G12_D6

8

DIG_IO_P20

IO_P8

LED8_D5

9

DIG_IO_P21

IO_P9

LED9_D5

10

3V3

3V3

3V3

11

DIG_IO_P22

IO_P10

LED10_D5

12

DIG_IO_P23

IO_P11

LED11_D5

13

DIG_IO_P24

IO_P12

LED12_D5

14

DIG_IO_P25

IO_P13

LED13_D5

15

DIG_IO_P26

IO_P14

LED14_D5

16

DIG_IO_P27

IO_P15

LED15_D5

17

DIG_IO_P28

IO_P16

LED16_D5

18

DIG_IO_P29

IO_P17

LED17_D5

19

DIG_IO_P30

IO_P18

LED18_D5

20

5V

5V

5V

../../../../_images/net_names_dvc_IPL120.png

Fig. 251 Netnames of connector 2 (IPL1-120-01-L-D-K) on Digital voltage card#

../../../../_images/net_names_PCB_IPL120.png

Fig. 252 Netnames of connector 2 (IPL1-120-01-L-D-K) on Loopback PCB#

../../../../_images/net_names_dac.png

Fig. 253 Netnames of Ethernet connector on ADC card#

Hint

To sum this up: The signals on Pin 2 to Pin 7 on both connectors (IPL1-115-01-L-D-K & IPL1-120-01-L-D-K) are used for the gate signals in the Loopback tutorial. P2 being the gate signal for the first high side switch, P3 for the corresponding low side switch, P4 for the second high side switch and so on. All Gate signals for the high side switches (Pin 2, Pin 4, Pin 6) and the first for the low side switches (Pin 3) are filtered and can be read back by the ADC card.

Downloads#

Rev01

Designer#

Designed by Nina Diringer (TH Nürnberg), 07/2022