Sharp LC-42SV32B, Руководство по обслуживанию

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LC-42SV32B
45
2.5 U606(MAX9)
General Description
The MAX9728A/MAX9728B stereo headphone amplifiers are designed for display and notebook applications or portable equipment where board space is
at a premium. These devices use a unique, patented DirectDrive™ architecture to produce a ground-referenced output from a single supply, eliminating
the need for large DC-blocking capacitors, saving cost, board space, and component height. The MAX9728A offers an externally adjustable gain, while the
MAX9728B has an internally preset gain of -1.5V/V. The MAX9728A/MAX9728B deliver up to 60mW per channel into a 32 Ω load and have low 0.02%
THD+N. An 80dB at 1kHz power-supply rejection ratio (PSRR) allows these devices to operate from noisy digital supplies without an additional linear
regulator. Comprehensive clickand-pop circuitry suppresses audible clicks and pops on startup and shutdown.
The MAX9728A/MAX9728B operate from a single 4.5V to 5.5V supply, consume only 3.5mA of supply current, feature short-circuit and thermal-overload
protection, and are specified over the extended -40°C to +85°C temperature range. The devices are available in tiny 12-pin Thin QFN (3mm x 3mm x
0.8mm) and 14-pin TSSOP packages (5mm x 4.4mm x 1.1mm).
Features
♦ No Bulky DC-Blocking Capacitors Required
♦ Low-Power Shutdown Mode, < 0.1µA
♦ Adjustable Gain (MAX9728A) or Fixed -1.5V/V Gain (MAX9728B)
♦ Low 0.02% THD+N
♦ High PSRR (80dB at 1kHz) Eliminates LDO
♦ Integrated Click-and-Pop Suppression
♦ 4.5V to 5.5V Single-Supply Operation
♦ Low Quiescent Current (3.5mA)
♦ Available in Space-Saving Packages
12-Pin Thin QFN (3mm x 3mm x 0.8mm)
14-Pin TSSOP (5mm x 4.4mm x 1.1mm)
Applications
Notebook PCs
DVD Players
LCD/PDP Displays
CRT TVs
Multimedia Monitors
2.6 U116(MAX3232ECPWR)
General Description
The MAX3232E device consists of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV IEC ESD protection pin to pin (serial-
port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous
communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V
supply. The devices operate at data signaling rates up to 250 kbit/s and a maximum of 30-V/ms driver output slew rate.
Features
· ESD Protection for RS-232 Bus Pins
– ±15 kV (HBM)
– ±8 kV (IEC61000-4-2, Contact Discharge)
– ±15 kV (IEC61000-4-2, Air-Gap Discharge)
· Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards
· Operates With 3-V to 5.5-V VCC Supply
· Operates up to 250 kbit/s
· Two Drivers and Two Receivers
· Low Supply Current . . . 300 mA Typ
· External Capacitors . . . 4 ´ 0.1 mF
· Accepts 5-V Logic Input With 3.3-V Supply
· Pin Compatible to Alternative High-Speed Device (1 Mbit/s)
– SNx5C3232