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參數(shù)資料
| 型號(hào)： | TEA2028-TEA2029 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | APPLICATION NOTE |
| 中文描述： | 應(yīng)用筆記 |
| 文件頁(yè)數(shù)： | 34/47頁(yè) |
| 文件大?。?/td> | 532K |
| 代理商： | TEA2028-TEA2029 |
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t
ON
Pin 15 VOLTAGE (V)
1.75
3.5
28
μ
s
2
Figure67
V.7.5 - Protection features
As soon asa safetysignal (V
≤
1.26V)is appliedto
Pin 28, lineand supplyoutputs(Pins 10 and 7) are
both disabled.Capacitor”C15” beginschargingup
until the voltage across it reaches 4V (K
V
CC
).
Outputs are again enabled and conductionperiod
gradually increases as it occurs upon initial start-
up.
The device will be definitivelyinhibited if the cycle
of eventsis repeated 3 times.
For the device to restart, the internal 3-bitregister
shouldberesetwhichrequirestheV
CC
tofallbelow
4V (see Figure68).
Pin 15 charging current : I
C(AV
) = - I
D(AV)
= - 3.1
μ
A
V.7.6 - TV Power supply in standby mode
V.7.6.1-Regulationbyprimarycontrollercircuit
This mode of regulation called ”Burst Mode” is
performedonlyby the primarycontrollercircuitand
is activated in the caseof missing controlpulses or
in the absenceof powersupply to TEA2028B.
In this mode, power available through secondary
winding is limited. Refer to TEA2164 Application
Note for furtherdetails.
Higherpowers can be obtainedby using the regu-
lation feature offered by TEA2028B. In this case,
the horizontal output (Pin 10) must be disabled.
V.7.6.2 - Regulation by TEA2028
(see Figure 69)
In thiscase, all that isrequiredis to disable theline
scanningfunction thus reducing the overall power
by90%.
The device power supply regulation loop remains
active, forminimum conductionperiod to be 1.5ms
the power delivered through secondary must be
higherthan 3W.
Line Output Inhibition
Two alternativesare possible :
- Groundingflip-flop Pin 1
- Apply a voltagehigher than 3V to Pin 12.
t
t
t
t
6V
3
2
I
C
I
D
Full Inhibition
Inverted
for
TEA2029C
1.26
0
4
3.5
Active area
Soft-start area
PIN 8
VOLTAGE (V)
PIN 15
VOLTAGE (V)
PIN 7
VOLTAGE
PIN 10 *
VOLTAGE
* Line output (Pin 10) and thyristor control output(Pin 4) for TEA2029C
2
Figure68
1
10
12
3V
V
L
V
12
R1
R2
≥
1
29
μ
s
10
V
CC
+
Standby
Mode
1.26V
≥
1
LF
Line Inhibition
(Standby Mode)
S
R
Q
3.3nF
2
Figure69
TEA2028 - TEA2029APPLICATIONNOTE
34/46
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TEA2028 | APPLICATION NOTE |
| TEA2028B | SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT |
| TEA2128 | SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT |
| TEA2164S | SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT |
| TEA2029C | COLOR TV SCANNING AND POWER SUPPLY PROCESSOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA2029 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:APPLICATION NOTE |
| TEA2029C | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:COLOR TV SCANNING AND POWER SUPPLY PROCESSOR |
| TEA2029CV | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Timing Processor (LINE, FRAME, SMPS) for TV Sets |
| TEA2031A | 功能描述:視頻 IC East/West Correction RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| TEA2031A_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:COLOR TV EAST-WEST CORRECTION |
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