Teac EU-34TB, Service Manual

Page: 10 / 40

9
High Flexibility
n Externally Programmable Reference Current
n Secondary or Primary Sensing
n High Current Totem Pole Output
n Undervoltage Lockout with Hysteresis
Safety/Protection Features
n Overvoltage Protection Facility against Open Loop
n Protection against Short Circuit on Oscillator Pin
n Fully Programmable Foldback
n Soft-Start Feature
n Accurate max Duty Cycle Setting
n Demagnetization (Zero Current Detection) Protection
n Internally Trimmed Reference
“Green Controller”
n Low Start-Up and Operating Current
n Patented Stand-by Pulsed Mode for low stand-by losses
n Low dV/dT for Low EMI radiations
PINNING PIN VALUE
1. Output Supply Voltage (Vcc) : 12VDC
2. Output Supply Voltage (Vc) : 12VDC
3. Output voltage : LOW Level Drop Voltage 1VDC, Max : 1.2VDC (Isink=100mA)
1.4VDC, Max : 2VDC (Isink=500mA)
HIGH Level Drop Voltage 1.5VDC, Max : 2VDC (Isource=200mA)
2VDC, Max : 2.7VDC (Isource=500mA)
4. Ground
5. Foldback input : 0.9VDC, Min:-0.3VDC, Max : Vcc+0.3VDC
6. Overvoltage protection (OVP) : 0.78VDC, Min:-0.3VDC, Max : Vcc+0.3VDC
7. Current sense input : Min:-0.3VDC, Max : Vcc+0.3VDC
8. Demagnetization detection input : Idemag-ib (source):-4mA Idemag-ib (sink) : 10mA
9. Standby current set : Ipeak-stby/Iref : 0.40 Min : 0.37 Max : 0.43
10. Oscillator voltage swing : 2Vpp
11. Soft start/Dmax/Voltage mode : Idischarge : 5mA, Min : 1.5mA (Vsoft start=1V)
12. Clamp E/A input : 4.7VDC, Min : 4.5VDC Max : 4.9VDC
13. E/A output : HIGH State: 6.5VDC, Min : 5.5VDC, Max : 7.5VDC LOW State : 1.0VDC, 1.1VDC
14. E/A input : 2.5VDC, Min : 2.4VDC, Max : 2.6VDC
15. Stand-by management : Stand-by On Detection current ratio : Idet/Iref : 0.38, Min : 0.34, Max : 0.42
Stand-by regulation current ratio : Ireg/Iref : 20.5, Min : 18, Max : 23
16. Rref input : 2.5VDC, Min : 2.4VDC, Max : 2.6VDC
SDA545X:
General description:
The SDA545X is designed for a low cost mono TV-set with analogue picture and sound control. IN SDA545X the following
IC’ s are used and supported:
Non-volatile memory : SDA 2526 or SDA2546
PLL : SDA 3202-3, SDA 3302
IR transmitter : SDA 2208-3 or SDA 2218
IR preamplifier : SFH 506-32
Features:
General:
n Display of program number, channel number, TV standard, analogue values, sleep timer, parental control, and mute is done by
OSD
n Single LED for IR active, standby and on mode indication
n Local control (8 keys)
n IR remote control
n Control of volume, contrast, brightness, and saturation by analogue voltages
n Non-volatile memory for 50 or 100 programs, optimum analogue values and system parameters
n Individual delta volume for each program
n 1 control line to select external source
n 3 control lines for TV standard selection
n Automatic muting if no carrier detected
n Automatic switch-off when carrier disappears for more than 5 minutes
n Software protection against tube flashovers with internal watchdog timer
n Sleep timer
n Parental control
n IF 45.75 MHz or 38.9 MHz selectable
Tuning:
n Frequency synthesis tuning (62.5 kHz steps)
n 192 step fine tuning
n Channels corresponding to standards
n 100 programs selectable by directly entering a program number or by up/down function depending on the NVM size
n Channel selection by directly entering a channel number or by up/down function
n Channel search function in two directions