Μpa672T; General Description; Features; Pin Connection - Hitachi 32LD8700C Service Manual

RINP

3

I

RINN

2

I

ROSC

27

I/O

ROUTN

44, 45

O

ROUTP

40, 41

O

SD

1

I

VARDIFF

9

I

VARMAX

10

I

VAROUTL

31

O

VAROUTR

32

O

VCLAMPL

25

-

VCLAMPR

36

-

VOLUME

11

I

VREF

8

I

V2P5

4

O

-

—

Thermal

Pad

11.30. µPA672T

11.30.1.

The μPA672T is a super-mini-mold device provided with two MOS FET elements. It achieves high-

density mounting and saves mounting costs.

11.30.2.

• Two MOS FET circuits in package the same size as SC-70

• Automatic mounting supported

11.30.3.

11.31.1.

General Description

The VPC 323xD is a high-quality, single-chip video front-end, which is targeted for 4:3 and 16:9, 50/60-

Hz and 100/120 Hz TV sets. It can be combined with other members of the DIGIT3000 IC family (such

as DDP 331x) and/or it can be used with 3rd-party products.

The main features of the VPC 323xD are

• high-performance adaptive 4H comb filter Y/C separator with adjustable vertical peaking

• multi-standard colour decoder PAL/NTSC/SECAM including all substandards

• four CVBS, one S-VHS input, one CVBS output

• two RGB/YC

C

component inputs, one Fast Blank (FB) input

r

b

• integrated high-quality A/D converters and associated clamp and AGC circuits

TFT TV Service Manual

Positive differential audio input for right channel

Negative differential audio input for right channel

Current setting resistor for ramp generator. Nominally equal to 1/8*VCC

Class-D 1/2-H-bridge negative output for right channel

Class-D 1/2-H-bridge positive output for right channel

Shutdown signal for IC (low = shutdown, high = operational). TTL logic levels with compliance to VC

DC voltage to set the difference in gain between the Class-D and VAROUT outputs. Connect to GND or

AVDDREF if VAROUT outputs are unconnected.

DC voltage that sets the maximum gain for the VAROUT outputs. Connect to GND or AVDDREF if

VAROUT outputs are unconnected.

Variable output for left channel audio. Line level output for driving external HP amplifier.

Variable output for right channel audio. Line level output for driving external HP amplifier.

Internally generated voltage supply for left channel bootstrap capacitors.

Internally generated voltage supply for right channel bootstrap capacitors.

DC voltage that sets the gain of the Class-D and VAROUT outputs.

Analog reference for gain control section.

2.5-V Reference for analog cells, as well as reference for unused audio input when using single-ended inputs.

Connect to AGND and PGND—should be center point for both grounds.

31

.

C