TEA2028B 查看數據表（PDF） - STMicroelectronics

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TEA2028B

COLOR TV SCANNING AND POWER SUPPLY PROCESSOR

STMicroelectronics 

TEA2028B

ELECTRICAL OPERATING CHARACTERISTICS (continued)

Tamb = 25oC, VCC = 12V (unless otherwise noted) Pulse duration at 50% of the ampifier

Symbol

Parameter

Min. Typ. Max. Unit

FRAME SYNCHRO ADJUSTMENT (Pin 20) (V20 = 2.5V)

I20H High Output Current (V27 = 12V)

I20L Low Output Current (V27 = 0V)

VCO (Pins 17-18 and 19)

7.2

µA

– 2.8

µA

Frequency control range after line divider (ceramic resonator : 503kHz)

15.30 to

kHz

16.10

PHASE COMPARATOR ϕ 1 (Pin 22)

Output Current Low Loop Gain

Output Current High Loop Gain

Window Pulse Width

± 0.35 ± 0.50 ± 0.65 mA

± 1 ± 1.5 ± 2 mA

7

10

13 µs

VCR SWITCHING (Pin 23)

Threshold Voltage VCR Operating

I23 Input Current (V23 = 0, VCC = 12V)

VIDEO IDENTIFICATION (Pin 24)

1.7

2.2

-0.030 -0.25

2.7 V

-1 mA

V24 Output Saturation Voltage (without video signal, I24 = 3mA)

V24 Output Voltage (with 60Hz video signal, I24 = 2.5mA)

V24 Output Voltage (with 50Hz video signal, I24 = 10µA)

VIDEO IDENTIFICATION (Pin 25)

0.2

0.6 V

5

6.5

7.5 V

11.0 11.5

V

I25 Output Current (charging the capacitor)

t25 Identification Time (charging the capacitor)

V25 Threshold (voltage changing from lower to higher value)

LHYS Hysteresis

H-RAMP GENERATOR (Pin 13)

0.5

0.75

1 mA

1.3

1.7

2.2 µs

4

4.5

5

V

350

mV

Ich13 Charge Current

VI13 Base Voltage of Saw-tooth

Idis13 Discharge Current

SUPER SANDCASTLE (Pin 11)

185

200

215 µA

0.5 V

3.5

7.0

mA

VB11 Burst key pulse level Output Voltage (I11 = – 5mA)

9

V

VL11 Line Blanking Pulse Level Output Voltage (I11 = – 5mA)

4

4.5

5

V

VBT11 Frame Blanking Pulse Level Output Voltage (and frame out of function)

2

2.5

3

V

(I11 = – 5mA)

SUPER SANDCASTLE

TB11 Delay between middle of synch pulse (Pin 27) and leading edge of burst 2.3

key pulse

Duration of burst key pulse

3.7

TO11 Delay Between SSC Cutting Level at Pin 12 and Line Blanking Pulse

Frame Blanking Time (start with reset of frame divider)

3.0 µs

4

5

0.35

21

Line

POSITIVE LINE FLY BACK INPUT (Pin 12)

VbI12

Vϕ12

I12

I12

I12

Delay between middle of synch pulse and middle of line retrace

Threshold for SMPS Safety

Threshold for Blanking

Threshold for PLL2

Input Current – 0.4 V < V12 < VbI12

Input Current VbI12 < V12 <Vϕ12

Input Current Vϕ12 < V12 < VCC

2.1

2.6

3.1 µs

1.1

V

0.3

V

3

V

-20

µA

-10

µA

0

1

µA

5/9

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