Safety/Protection Features
Overvoltage Protection Facility against Open Loop
Protection against Short Circuit on Oscillator Pin
Fully Programmable Foldback
Soft-Start Feature
Accurate max Duty Cycle Setting
Demagnetization (Zero Current Detection) Protection
Internally Trimmed Reference
Green Controller"
Low Start-Up and Operating Current
Patented Stand-by Pulsed Mode for low stand-by losses
Low dV/dT for Low EMI radiations
PINNING
1 . Output Supply Voltage (Vcc)
2. Output Supply Voltage (Vc)
3. Output voltage
4. Ground
5. Foldback input
6. Overvoltage protection (OVP)
7. Current sense input
8. Demagnetization detection input
9. Standby current set
10. Oscillator voltage swing
1 1 . Soft start/D max/Voltage mode
12. Clamp E/A input
13. E/A output
14. E/A input
15. Stand-by management
16. Rref input
PIN VALUE
12VDC
12VDC
LOW Level Drop Voltage 1VDC, Max 1.2VDC (lsink=100mA)
1.4VDC, Max 2VDC (lsink=500mA)
HIGH Level Drop Voltage 1.5VDC, Max 2VDC (lsource=200mA)
2VDC, Max 2.7VDC (lsource=500mA)
0.9VDC, Min:-0.3VDC, Max : Vcc+0.3VDC
0.78VDC, Min:-0.3VDC, Max : Vcc+0.3VDC
Min:-0.3VDC, Max: Vcc+0.3VDC
Idemag-ib (source):-4mA Idemag-ib (sink): 10mA
Ipeak-stby/lref: 0.40 Min : 0.37 Max : 0.43
2Vpp
[discharge : 5mA, Min : 1.5mA (Vsoft starts! V)
4.7VDC, Min : 4.5VDC Max : 4.9VDC
HIGH State: 6.5VDC, Min : 5.5VDC, Max : 7.5VDC LOW State : l.OVDC, 1.1VDC
2.5VDC, Min : 2.4VDC, Max : 2.6VDC
Stand-by On Detection current ratio : Idet/lref: 0.38, Min : 0.34, Max : 0.42
Stand-by regulation current ratio : Ireg/lref: 20.5, Min : 18, Max : 23
2.5VDC, Min : 2.4VDC, Max : 2.6VDC
SDA525X:
General description:
The SDA525X is designed for a low cost,mono TV-set with analogue picture and sound control. IN SDA525X the following
1C' s are used and supported:
Non-volatile memory
PLL
IR transmitter
IR preamplifier
SDA 2526 or SDA2546
SDA 3202-3, SDA 3302
SDA 2208-3 or SDA 2218
SFH 506-32
Features:
General:
• Display of program number, channel number, TV standard, analoaue values, sleep timer, parental control, and mute is done by
OSD
Single LED for IR active, standby and on mode indication
Local control (8 keys)
IR remote control
Control of volume, contrast, brightness, and saturation by analogue voltages
Non-volatile memory for 50 or 100 programs, optimum analogue values and system parameters
Individual delta volume for each program
1 control line to select external source
3 control lines for TV standard selection
Automatic muting if no carrier detected
Automatic switch-off when carrier disappears for more than 5 minutes
Software protection against tube flashovers with internal watchdog timer
Sleep timer
Parental control
IF 38 MHz or 38.9 MHz selectable
uning:
Frequency synthesis tuning (62.5 kHz steps)
192 step fine tuning
Channels corresponding to standards
100 programs selectable by directly entering a program number or by up/down function depending on the NVM size
Channel selection by directly entering a channel number or by up/down function
Channel search function in two directions
Sound:
• Mono sound control by analogue voltage
Service Mode:
• System configuration with service mode
14
Summary of Contents for 11AK19
Page 1: ...SERVICE MANUAL CHASSIS 11 AK19 FIRMEN EUROLINE PALLADIUM S E G TECHLINE VESTEL...
Page 27: ...GENERAL BLOCK DIAGRAM OF CHASSIS AK19 26...
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