Ic1702/1735/1745 (Vhilv5805M+-1Y); Ic1951 (Vhisii9025+-1Q) - Sharp LC-32D44E Service Manual

5. IC1702/1735/1745 (VHILV5805M+-1Y)

Step-down DC-DC converter
This is a 1ch step-down switching regulator. It incorporates 0.2ΩFET on the upper side and realizes high-efficiency operation for large output current.
Since the current mode control method is adopted, good load current response and easy phase compensation are available.
The standby mode can be entered using the ON/OFF terminal. The load device is protected by the pulse-by-pulse or current protection and overheat
protection function. Soft start becomes possible by applying capacitance to the soft start terminal.
Pin No. Pin Name
1 BOOT
2 VIN
3 SW
4 GND
5 FB
6 COMP
7 EN
8 SS

6. IC1951 (VHiSii9025+-1Q)

The Sii9025 is a compliant with the latest HDMI 1.2 (High Definition Multimedia Interface) specification.
Backward compatibility with DVI 1.0 allows HDMI systems to connect to existing DVI 1.0 hosts.
The SiI9025 is capable of receiving and outputting two channel digital audio at up to 192 kHz- an excellent solution for Digital TVs.
An S/PDIF port supports up to 192 kHz audio.
The SiI9025 also comes pre-programmed with HDCP keys, greatly simplifying the manufacturing process, while providing the highest level of HDCP
key security.
Description:
• Dual-Input HDMI 1.2, HDCP 1.1 and DVI 1.0 compliant receiver.
• Integrated TMDSR core.
• Digital video interface supports video processors:
24-bit RGB/YCbCr 4:4:4
16/20/24-bit YCbCr 4:2:2
8/10/12-bit YCbCr 4:2:2 (ITU BT.656)
12-bit DMO (Digital Multimedia Output) RGB/YCbCr 4:4:4 (clocked with rising & falling edges)
Color Space Conversion for both RGB-to-YCbCr and YCbCr-to-RGB (both 601 and 709)
Auto video mode configuration simplifies system firmware design.
• Digital audio interface supports high-end audio systems:
One programmable I2S output for connection to low-cost DACs at 32-192kHz.
S/PDIF output supports PCM, Dolby Digital, DTS digital audio transmission (32-192kHz Fs) using IEC60958 and IEC61937.
Auto audio error detection with programmable soft mute.
• Integrated HDCP decryption engine for receiving protected audio and video content.
I/O
--- Upper part MOS transistor boot strap capacity connection terminal.
I Power voltage supply terminal.
O Power Switch terminal.
--- Ground.
I Feedback terminal.
--- Phase amends terminal.
I Enable terminal.
I Soft start terminal.
5 – 4
LC32D44E/S/RU-BK/GY (1st Eddition)
Pin Function