iWave Rainbow-G7D, Руководство пользователя по оборудованию

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Rev 1.0
Page 42 of 69
Generic Q7 Carrier Card Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
14 LVDS_B_CLK- LVDS secondary channel
differential pair clock lines.
15 LVD
16 GND Ground
17 LVDS_B3- LVDS secondary channel
differential pair 3.
18
19 GND Ground
20 GND Ground
M1,
M2 Mechanical Support Mechanical Support
Note: LVDS Connector part number: DF19G-20P-1H(54) / DF19G-20P-1H (56)
Figure 36: LVDS1 Connector Pin Out
Pin No Pin Detail Description
1 LED_A1 LED Anode
2 LED_K1 LED Cathode
Figure 37: LVDS1 Backlight Connector Pin Out
Note: Presently backlight LED driver output is configured for 15V and 300mA. But backlight
voltages and current requirement is different for different LVDS LCD’s. To meet the power
requirement for particular LCDs the following hardware changes has to be done on carrier card
for both LCDs backlight LED drivers.
LED Driver part Number: LM3410XQMF/NOPB
Settings for primary LVDS backlight LED driver:

Change D19 Zener Diode from 15V to required voltage. (Populated diode part number is
BZT52C15-7-F)

Change Current sensing resistor R
SET
: R403 to required calculated value to set the output
current. Where V
FB
= 190mV, I
LED
is current required for LCD backlight LEDs.
Settings for Secondary LVDS backlight LED driver:

Change D31 Zener Diode from 15V to required voltage. (Populated diode part number is
BZT52C15-7-F)

Change Current sensing resistor R
SET
: R576 to required calculated value to set the output
current. Where V
FB
= 190mV, I
LED
is current required for LCD backlight LEDs.