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參數(shù)資料
| 型號： | TEA1552 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | GreenChipII SMPS control IC |
| 中文描述： | GreenChipII開關(guān)電源控制IC |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 119K |
| 代理商： | TEA1552 |
2002 Aug 27
8
Philips Semiconductors
Product specification
GreenChip
II SMPS control IC
TEA1552
Operation only recommences when the V
CC
voltage drops
below a level of approximately 4.5 V (practically when the
V
mains
has been disconnected for a short period).
The output voltage (V
OVP
) at which the OVP function trips,
can be set by the demagnetization resistor R
DEM
:
N
N
aux
where N
s
is the number of secondary turns and N
aux
is the
number of auxiliary turns of the transformer.
Current I
OVP(DEM)
is internally trimmed.
The value of the demagnetization resistor (R
DEM
) can be
adjusted to the turns ratio of the transformer, thus making
an accurate OVP possible.
Valley switching
(see Fig.8)
A new cycle starts when the power switch is switched on.
After the ‘on-time’ (which is determined by the ‘sense’
voltage and the internal control voltage), the switch is
opened and the secondary stroke starts.
After the secondary stroke, the drain voltage shows an
oscillation with a frequency of approximately
2
π
×
L
p
C
d
×
(
)
×
(
)
where L
p
is the primary self inductance of the transformer
and C
d
is the capacitance on the drain node.
V
OVP
-----------
I
OVP DEM
)
R
DEM
V
clamp DEM
)
pos
(
)
+
×
[
]
×
=
-------------------------1
handbook, full pagewidth
drain
secondary
stroke
MGU235
secondary
ringing
primary
stroke
valley
B
A
secondary
stroke
oscillator
A: Start of new cycle at lowest drain voltage.
B: Start of new cycle in a classical PWM system at high drain voltage.
Fig.8 Signals for valley switching.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA1552T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChipII SMPS control IC |
| TEA1552T/N1 | 制造商:NXP Semiconductors 功能描述:AC-DC SMPS 14SOIC 制造商:NXP Semiconductors 功能描述:AC-DC, SMPS, 14SOIC |
| TEA1552T/N1,118 | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 GREENCHIP II SMPS CONTROL IC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TEA1552T/N1,518 | 功能描述:DC/DC 開關(guān)控制器 GRNCHIP2 SMPS CNTRLR RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TEA1553T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip II SMPS control IC |
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