Speaker Connector - Seco SBC-D23 User Manual

3.3.12 Audio Connectors
TRSS Audio Jack CN24
Pin Signal
TIP Headphone Out Left Channel
RING1 Headphone Out Right Channel
RING2 GND
SLEEVE Mic In

Speaker Connector

CN47
Pin Signal
1 SPKR_OUT+
2 GND
3 SPKR_OUT-
Amplified stereo speaker connector
CN55
Pin Signal
1 AMP_OUT_LEFT+
2 AMP_OUT_LEFT-
3 AMP_OUT_RIGHT+
4 AMP_OUT_RIGHT-
since this interface is needed as an input to the amplifier.
SBC-D23
SBC-D23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by P.Z. - Copyright © 2021 SECO S.p.A.
On SBC-D23 board, audio functionalities are offered directly by the RK809 PMIC, which embeds a high
performance Audio Codec.
Always available on all factory configurations of SBC-D23 board, there is a TRRS Combo Audio
Socket CN24, i.e. a single socket which offer both stereo Line Out and Mic In functionalities.
Such TRRS Combo Audio socket can be used with any 4-poles 3.5mm diameter audio jack,
with pinout compatible with the most recent Headsets, shown in the table on the left.
Always available, there is also a dedicated 3-pin connector, type 53398-0371, for the connection of external
speakers (earphones)
Mating connector: MOLEX 51021-0300 receptacle with MOLEX 50079-8000 female crimp terminals.
SPKR_OUT+: Amplified speaker Positive Output
SPKR_OUT-: Amplified speaker Negative Output
As a factory option, the SBC-D23 board can be supplied with a TI TPA3110D2 Class-D amplifier,
offering stereo speaker output on a Micro-fit 2x2 connector type Molex 43045-0424 or equivalent, as
shown in the figure.
Mating connector: MOLEX 43025-0400 or equivalent with 43030 female crimp terminal
The power output available on this connector is dependent on the value of V
powered with a 24V voltage, it can reach up to 15W per channel on 8Ohm load @ 10% Total Harmonic Distortion
+ Noise (THDN+N)
Please be aware that the optional audio amplifier will exclude the headphone out (right and left) on TRRS connector,
Power rail. When the board is
IN
36