Backlight Connector - Seco COM-Express CCOMe-965 User Manual

3.3.11 Backlight connector

Onboard there is also a small connector intended for carrying out power supplies, for the connection to an eventual panel backlight's module. This connector
carries out both Power supplies and control signals.
Backlight connector - CN20
Pin Signal Pin
1 SW_VDD_FUSE 2
3 +5V_S_FUSE 4
5 LVDS_PWR_EN 6
7 Analogic Dimming 8
9 GND 10
rails, nanoSMDC075-F for LCD power rails).
Analogic_Dimming is a +5V signal, derived from the PWM signal LVDS_BKLT_CTRL coming from COM Express module, for direct analogic control of backlights
not supporting PWM.
JP2 position SW_VDD_FUSE Voltage Value
1-2 +5V_S
2-3 +3.3V_S
JP3 position SW_BACK_FUSE Voltage Value
1-2 +12V_S
2-3 +5V_S
CCOMe-965
CCOMe-965 - Rev. First Edition: 1.0 - Last Edition: 3.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
The connector, CN20, is an IDC connector, dual row, 10 pin, p2.54 mm connector,
type MOLEX p/n 70246-1004 or equivalent.
Signal
Mating connector: MOLEX p/n 22-25-2102 with 70058 series female crimp
terminals.
SW_BACK_FUSE
+12V_S_FUSE SW_VDD_FUSE and SW_BACK_FUSE means Switched_VDD and Switched_Backlight, i.e.,
these are the voltage that can be supplied to LCD and backlight, respectively, and can be driven
LVDS_BACKLIGHT_EN
via software.
LVDS_BKLT_CTRL
The suffix _FUSE means that these voltage rails, like +5V_S_FUSE and +12V_S_FUSE, are
GND
protected by dedicated Polyswitch Resettable devices (Tyco miniSMDC075-F for backlight power
LCD software-driven voltage, i.e. signal SW_VDD_FUSE, can also be regulated to be +5V_S or
+3.3V_S, using jumper JP2, which is a standard pin header, P2.54mm, 1x3 pin.
Similarly, backlight software-driven voltage, signal SW_BACK_FUSE, can be regulated to be +12V_S or
+5V_S, using jumper JP3, which is another standard pin header, P2.54mm, 1x3 pin.
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