1. EC_ASIC drawing (1) ASIC BASIC FASIC D 68 pi ns ASIC A 68 pi ns ASIC C ASIC E 120 pins ABCDEF 68 pi ns 68 pi ns 68 pi ns 68 pi ns

2. EC_ASIC top view Fixation holes 15 mm 80 mm 20 mm 159 mm

3. EC_ASIC drawing (2)

4. 56 mm ~ 8 mm Mechanical structure EC_ASIC (1.6 mm thick) Mechanical structure connectorconnector connectorconnector connectorconnector connectorconnector connectorconnector connectorconnector TOP View 120 pins connector

5. 56 mm ~ 8 mm Mechanical structure EC_ASIC (1.6 mm thick) Mechanical structure Bottom View 68 pins connector from EC_ASIC (3.5 mm) + 68 pins connector from EC_anode (8.5 mm) + EC_anode pcb (1.2 mm)

6. Side view –estimation Mechanical structure EC_ASIC board CONNECTORS EC_anode ASIC

7. 2222 2 2 2 2 2 2 HK 1 2 BAT_RET (P) 28V_BAT (P) GND_28V (S) GND_3.3V (S) 28V (S) 3.3V (S) GND_M HVPS-1 would have DC/DC converters to isolate the powers GND_M 0-2.44V STATUS ON/OFF 3 DAC 6 Differential signals (LVDS) ( x2 = 18 wires) between HK and HVPS-1 4 differential transmitters 2 differential receivers CS_DAC CS_IO HVPS-1 MISO MOSI SCK MOSI 6 bidirectional signals 6 status signals I/O expander s 4 differential receivers MISO Interrupt SCK Interrupt HVPS-1 - HVPS-2 - HK - PDM-Board Interface Synoptic : 1 st flight version 7 D-Sub 15 F D-Sub 15 M 6 C-W D-Sub 9 F D-Sub 9M BATTERY 3 C-W 6 x 14 HV lines 3 x 14 HV lines 9 9 3 3 STATUS 3 ON/OFF 3 0-2.44V GND_M HVPS-2 CS_DAC SCK MOSI CS_OUT 6 DAC 6 D-SUB 25 F D-SUB 25 M D-Sub 9 F D-Sub 9M VERSION USED 24 wires PDM_Board Micro-D 9 F Micro-D 9 M 4 differential receivers 4 differential transmitters 4 Differential signals (LVDS) ( x2 = 8 wires) between PDM_Board and HVPS-1 4 SWITCH COMMANDS 2 differential transmitters

8. Full PDM and potential areas for HVPS 2 possibilities for HVPS: 20 x 115 mm2 29 x 53 mm2 After discussions with Jaceks, APC group and Pierre  27 x 53 mm2 chosed

9. Reminder of the cables/interfaces/connections HVPS1 HVPS2 15 lines toward HK (15 D-SUB) 9 lines toward PDM board (9 micro-D) 14 x 3 HV cables 14 x 6 HV cables 28 V + gnd battery (9 D-SUB) 25 lines (25 D-SUB)

10. 159 mm 27 mm 53 mm 14 * 3 HV cables 159 mm 27 mm 53 mm HVPS-1 14 * 6 HV cables HVPS-2 3D view of the HPVS NB: 159 mm and 53 mm are the maximum available Better if it is less than that to fit more easily. D-SUB 25 M To HVPS-1 D-SUB 25 F To HVPS-2 D-SUB 15 F To HK D-SUB 9 F To Battery Micro-D 9 M To PDM_Board

11. Fixation with 2 plates Top view Plate used to fixe the HVPS to the mechanical structure on the side.

12. ~56 mm Lateral view ~120 mm Fixation plate Fixation to the Back part of the PDM mechanical Structure. Fixation of the HVPS To the fixation plate ~27 mm ~53 mm ZONE where to put the holes for the cables

13. ~56 mm ~120 mm ~27 mm ~53 mm ZONE where to put the holes for the cables If HVPSs don’t lay directly on the fixation plate like bellow Other possible zones for cables

14. ~56 mm ~60 mm ~53 mm ZONE where to put the holes for the cables Another (better) option: The plate could have half height and be fixed to the mechanical structure with 6 screws. OR

15. HVPS1 3CW + DAC + all DC/DCs HVPS2 6CW + Comman ds + DAC EC_anode Flex cables Ballon heater (fixation) EC_HV boards should be oriented like that

16. HVPS1HVPS2 Positionning of the PDM board on the PDM

17. FPGA Ballon heater (fixation) Positionning of the PDM board on the PDM with respect to the Balloon mechanic