Datasheet
OC01 - High Current DC Switch
Front
Back
☒
CHIP
Main Category Output
Sub Category Control
Introduced 1 January 2017
Current version 1.0.0
Current version date 1 January 2017
Dimensions
Size 2U×2U
Weight 8 g
Height 12.3/8.3/2.4 mm
Non-
☒
BUS Connections
North Terminal block
Main Chip Set
Main Chip PCA9536
I²C Configuration
Default Address 0x41
XinaBox Datasheet OC01 - High Current DC Switch
Contents
1 Overview
2 OC01 as Burn Wire Controller - Balloon Mission Flight Control Application Note
3 Specifications
4 External Links
Overview
This xCHIP forms part of the interface modules and is equipped with a high speed IO expander
chip allowing the user to switch a high current through the available MOSFETs. The module is
based off the PCA9536 remote 4-bit I
2
C I/O expander and 4 DMN2041L 6.4 A MOSFETs to
provide 4 channels. Each channels is equipped with an output indicator LED to allow for easy
debugging.
Product highlights
6 A Switching Current Capable
Fast Switching
4 High Current Output Channels
Output LEDs
OC01 as Burn Wire Controller - Balloon Mission Flight
Control Application Note
The OC01 module has been designed to support the control of HAB balloon missions, and has four
stages:
Burn 1 – Launch
Detach the full balloon unit with payload from the launch pad.
Burn 2 – Burst
The burn wire detaches the balloon when an altitude of 5km has been achieved, or sooner
if required. The burn unit can receive signals from the ground station via the radio module,
allowing for the team on the ground to terminate the mission if required.
Burn 3 – Parachute Deployment
The parachute should not be deployed too high above the ground, as wind could take the
payload too far off course and result in it not being retrieved. The parachute will be
deployed at a predetermined altitude to ensure that the payload is retrievable yet not
destroyed by a hard landing.
Burn 4 – Release the payload from the parachute
If the parachute is caught in power lines or trees it may be necessary to detach the
payload through instruction relayed to the burn wire module.
Specifications
PCA9536
4-bit I
2
C-bus Output Channels
Polarity Inversion register
Low standby current
No glitch on power-up
Internal power-on reset
0 Hz to 400 kHz I
2
C-bus clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
DMN2041L
Max Voltage: 20 V
Continuous Drain Current: 6.4 A
Pulsed Drain Current: 30 A
Static Drain-Source On-Resistance: 26 mΩ