TEA2128 データシートの表示（PDF） - STMicroelectronics

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TEA2128

COLOR TV SCANNING AND POWER SUPPLY PROCESSOR

STMicroelectronics 

TEA2128

ELECTRICAL CHARACTERISTICS (continued)

(TAMB = 25oC; VCC = 12V; Pulse duration 50% of the amplitude)

Symbol

Parameter

Pins

Test conditions

SUPER SANDCASTLE GENERATOR (continued)

Burst Pulse Duration

Line Blanking Duration

Frame Blanking Duration

21 q 50Hz

21 q 60Hz

22 Fixed by flyback

Signal pin 22

21 Fixed by the logic

FRAME SAW-TO OTH GENERATOR

Low DC Voltage

24

Discharge Current

1

60Hz Internal

1

FRAME LOGIC SYNCH.

Free Running Period

Synchronization Windows

1-24

Without video signal

Identification low

Identification 50Hz high

Identification 60Hz high

VCR mode

FRAME SAFETY INPUT

Switching Threshold

Output current

15 Actived without negative pulse

during frame blanking time.

S.M. P.S.

Input Current

tON (max.)

tON (min.)

Transfer Characteristic

High Level Voltage

SOFT- START

10 VPin 10 = VREF

∆tPin 11 / ∆VPin 10

11

11

11 Rload / GND = 500Ω

VCC Starting Voltage for Line

and S.M.P.S.

Switch-off Voltage For Line

and S.M.P.S. Output

Discharge Current

CURRENT REFERENCE

13 VCC rising

13 VCC decreasing

9 q Before soft start period, VCC > 7V

VPin 9 > Vmax. Pin 17

q During soft start period, VCC > 7V

VPin 9 < Vmax. Pin 17

V18 Voltage

Temperature Shift

18 R18 = 3.32 kΩ (1%)

18 ∆T = 80oC

Min. Typ. Max.

4.4

3.9

21

1.3

15

60

8

315

247

361

309

315

247

277

247

361

1.3

40 50 67

2

1.9

28

1

9

7 7.4

6.5

60

2.3

1.21 1.3 1.39

±1

Unit

µs

µs

Line

V

mA

µA

Line

Line

Line

Line

Line

V

µA

µA

µs/µV

µs

µs

V

V

V

µA

µA

V

%

GENERAL DESCRIPTION

Introduction

This integrated circuit uses high density I2L bipolar

technologyand combines analogsignal processing

with digital processing.

Timing signals are obtained from a voltage-control-

led oscillator (VCO) operating at 500kHz by means

of a cheap ceramic resonator. This avoid the fre-

quency adjustment normally required with line and

frame oscillators.

A chain of dividers and appropriate logic circuitry

produces very accurate defined sampling pulses

and the necessary timing signals.

Internal Functions

- Horizontal scanning processor

- Frame scanning processor

- B class frame output stage using an external

power amplifier with flyback generator

- Line and frame synchronization separation

- Dual phase-locked loop horizontal scanning

5/8

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