Sharp LC-32SH25E, Service Manual

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LC-32SH25E
48
2.2. U103, U104 (L5985 VFQFPN8)
2.2.1 Pin Connections and short description
N
°
Type Description
1 OUT Regulator output
2
SYNCH Master/Slave Synchronization. When it is left floating, a signal with a phase shift of half a period respect to the power turn
on is present at the pin. When connected to an external signal at a frequency higher than the internal one, then the
device is synchronized by the external signal, with zero phase shift.
Connecting together the SYNC pin of two devices, the one with higher frequency works as master and the other one as
slave; so the two power turn on have a phase shift of half a period.
3
INH A logical signal (active high) disable the device. With INH higher than 1.9V the device is OFF and with INH lower than
0.6V the device is ON.
4 COMP Error Amplifier output to be used for loop frequency compensation
5
FB Feedback input. Connecting the output voltage directly to this pin the output voltage is regulated at 0.6V. To have higher
regulated voltages an external resistor divider is required from Vout to FB pin.
6
F
SW
The switching frequency can be increased connecting an external resistor from FSW pin and ground. If this pin is left
floating the deice works at its free-running frequency of 250KHz.
7
GND Ground
8 V
CC
Unregulated DC input voltage
2.3. U351, U352 (HYB18TC512160B2F-25 TFBGA84)
2.3.1 Pin Connections and short description
AOSDATA
2
AOSDATA
3 AOSDATA
0 AOSDATA
1
AOSDATA
4
AOBCK
AOLRCK AOMCLK ALIN
IF_AGC RF_AGC ASPDIF
TN ER_CL U
K ATA
AVICM
DVSS
VM D
LL
AVSS12
LL
LL
VIP_ATV
VINDC
VCCK VCCK
AVDD12_R
GB_DIG
CVBS0P
CVBS0N
_P
LL
I
LL
AVSS12_P
AVSS12_P
TN ER_D U