Tcet1102G; Applications; Features; Tda9885T - Sharp 32LW-92H Service Manual

13.12.TCET1102G

13.12.1.Description
The TCET110/ TCET2100/ TCET4100 consists of a phototransistor optically coupled to a gallium
arsenide infrared-emitting diode in a 4-lead up to 16-lead plastic dual inline package. The elements are
mounted on one lead frame using a coplanar technique, providing a fixed distance between input and
output for highest safety requirements.

13.12.2.Applications

Circuits for safe protective separation against electrical shock according to safety class II (reinforced
isolation):
For appl. class I – IV at mains voltage ≤300 V
For appl. class I – III at mains voltage ≤600 V
According to VDE 0884, table 2, suitable for: Switch-mode power supplies, line receiver, computer
peripheral interface, microprocessor system interface.

13.12.3.Features

VDE 0884 related features:
Rated impulse voltage (transient overvoltage) V
Isolation test voltage (partial discharge test voltage) V
Rated isolation voltage (RMS includes DC) V
Rated recurring peak voltage (repetitive) V
General features:
CTR offered in 9 groups
Isolation materials according to UL94-VO
Pollution degree 2 (DIN/VDE 0110 / resp. IEC 664)
Climatic classification 55/100/21 (IEC 68 part 1)
Special construction: Therefore, extra low coupling capacity of typical 0.2pF, high Common Mode
Rejection
Low temperature coefficient of CTR
G = Leadform 10.16 mm; provides creepage distance > 8 mm, for TCET2100/ TCET4100 optional;
suffix letter 'G' is not marked on the optocoupler
Coupling System U

13.13.TDA9885T

13.13.1.General Description

The TDA9885 is an alignment-free single standard (without positive modulation) vision and sound IF signal
PLL.
13.13.2.Features
5 V supply voltage
Gain controlled wide-band Vision Intermediate Frequency (VIF) amplifier (AC-coupled)
Multistandard true synchronous demodulation with active carrier regeneration (very linear demodulation,
good intermodulation figures, reduced harmonics, excellent pulse response)
Gated phase detector for L/L accent standard
Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free; frequencies switchable for all
negative and positive modulated standards via I
Digital acquisition help, VIF frequencies of 33.4, 33.9, 38.0, 38.9, 45.75 and 58.75 MHz
4 MHz reference frequency input [signal from Phase-Locked Loop (PLL) tuning system] or operating as
crystal oscillator
VIF Automatic Gain Control (AGC) detector for gain control, operating as peak sync detector for negative
modulated signals and as a peak white detector for positive modulated signals
Precise fully digital Automatic Frequency Control (AFC) detector with 4-bit digital-to-analog converter; AFC
bits via I C -bus readable
2
TakeOver Point (TOP) adjustable via I
Fully integrated sound carrier trap for 4.5, 5.5, 6.0 and 6.5 MHz, controlled by FM-PLL oscillator
Sound IF (SIF) input for single reference Quasi Split Sound (QSS) mode (PLL controlled)
SIF AGC for gain controlled SIF amplifier; single reference QSS mixer able to operate in high performance
single reference QSS mode and in intercarrier mode, switchable via I
AK45 Service Manual
= 8 kV peak
IOTM
= 1.6 kV
pd
= 600 V
IOWM RMS
= 600 V
IORM RMS
C-bus
2
C-bus or alternatively with potentiometer
2
16
(848 V peak)
C-bus
2
17/12/2007