Toshiba 29VH27D, Service Manual

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12
• Output Adjustable between 1.2 V and 37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting Constant with Temperature
• Output Transistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
• Available in Surface Mount D
2
PAK, and Standard 3–Lead Transistor Package
• Eliminates Stocking many Fixed Voltages
14.8.DDP3310
14.8.1.Description
The DDP 3310B is a single-chip digital Display and Deflection Processor designed for high-quality
back-end applications in 100/120-Hz TV sets with 4:3 or 16:9 picture tubes. The IC can be combined
with members of the DIGIT 3000 IC family (VPC 32xx, TPU 3040), or it can be used with third-party
products. The IC contains the entire digital video component and deflection processing and all analog
interface components.
14.8.2.Features
Video processing
– linear horizontal scaling (0.25 … 4)
– non-linear horizontal scaling “panorama-vision”
– dynamic peaking
– soft limiter (gamma correction)
– color transient improvement
– programmable RGB matrix
– picture frame generator
– two analog RGB/Fast-Blank inputs. The DDP 3310B is a single-chip digital Display and Deflection
Processor designed for high-quality back-
Deflection processing
– scan velocity modulation output
– high-performance H/V deflection
– EHT compensation for vertical / East/West
– soft start/stop of H-Drive
– vertical angle and bow
– differential vertical output
– vertical zoom via deflection
– horizontal and vertical protection circuit
– adjustable horizontal frequency for VGA/SVGA display
Miscellaneous
– selectable 4:1:1/ 4:2:2 YC
r
C
b
input
– selectable 27/ 32-MHz line-locked clock input
– crystal oscillator for horizontal protection
– automatic picture tube adjustment (cutoff, white-drive)
– single 5-V power supply
– hardware for simple 50/60-Hz to 100/ 120-Hz conversion (display frequency doubling)
– two I
2
C-controlled PWM outputs
– beam current limiter
14.8.3.Pin connection and short descriptions
NC = not connected LV = if not used, leave vacant
X = obligatory; connect as described in circuit diagram IN = Input
OUT = Output SUPPLY = Supply Pin
Pin no
PLCCK 68 pin Pin name Type Connection
(if not used) Short description
1 VSUPP SUPPLY X Supply voltage, Output pin driver
2 GNDP SUPPLY X Ground, Output pin driver
3 VS2 IN GNDD Additional VSYNC input
4 FIFORRD OUT LV FIFO Read counter reset