Sharp LC-40SH340K Service Manual

57
LC-40SH340E
LC-40SH340K
19. RTA8283A (U23, U173)
19.1. General Description
The RT8283A is a high-efficiency, monolithic synchronous step-down DC/DC converter that can deliver up
to 3A output current from a 4.5V to 23V input supply. The RT8283A's current mode architecture and
external compensation allow the transient response to be optimized over a wide range of loads and output
capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates
input current surge during start-up. The RT8283A also provides output under voltage protection and thermal
            
power management in battery powered systems. The RT8283A is available in a SOP-8 package.
19.2. Features
x ±1.5% High Accuracy Feedback Voltage
x Integrated N-MOSFET Switches
x Current Mode Control
x Fixed Frequency Operation : 340kHz
x Output Adjustable from 0.8V to 20V
x Up to 95% Efficiency
x Thermal Shutdown Protection
18.1
18.2
18.

Sharp LC-40SH340K Specifications

General

Teletext function	Yes
DVI port	No
HDMI version	1.3
SCART ports quantity	1
Product color	Black
Mercury content	60 mg
Panel mounting interface	400 x 400 mm
Display diagonal	40 \
Display technology	LCD
Display diagonal (metric)	102 cm
Annual energy consumption	177 kWh
Audio decoders	Dolby Digital, Dolby Virtual Speaker
RMS rated power	12 W
Power consumption (standby)	0.5 W
Analog signal format system	NTSC, PAL, SECAM
Digital signal format system	DVB-T

Weight and Dimensions

Depth (with stand)	323 mm
Width (with stand)	970 mm
Height (with stand)	657 mm
Weight (with stand)	18300 g
Depth (without stand)	91 mm
Height (without stand)	613 mm