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參數(shù)資料
| 型號： | TEA1532P |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | GreenChip SMPS control IC |
| 中文描述： | 2 A SWITCHING CONTROLLER, 75 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 10/27頁 |
| 文件大小： | 147K |
| 代理商： | TEA1532P |
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9397 750 13113
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 28 May 2004
10 of 27
Philips Semiconductors
TEA1532
GreenChip
II SMPS control IC
7.14 Brown-out protection
During the so called brown-out test, the input voltage is slowly decreased. Since the
on-time depends on V
i
, overlong on-times at low V
i
can damage the (external) power
device. This is prevented by stopping the converter when the input voltage drops too low.
When the voltage on pin DEM drops below
50 mV during the on-time (QR mode), the
maximum on-time is set to 25
μ
s. The maximum on-time will be reached while V
i
is low.
Subsequently, the IC stops switching and V
CC
drops below V
UVLO
. Capacitor C
VCC
will
only be recharged and the supply will restart only when voltage V
i
is high enough (V
m
,
also see
Section 7.1
). In addition to this, a V
i
level at which the converter has to enter a
safe restart can be set with a demag resistor. During the primary stroke, the rectified
mains input voltage is measured by sensing the current drawn from pin DEM. This current
depends on the mains voltage, according to the following formula:
V
R
DEM
R
DEM
Where:
The latter function requires an on-time of at least 2
μ
s. This on-time ensures that a reliable
demag current can be measured.
(1) Start of new cycle at lowest drain voltage.
(2) Start of new cycle in a classical PWM system at high drain voltage.
Fig 8.
Signals for valley switching.
drain
secondary
stroke
mgu235
secondary
ringing
primary
stroke
valley
(2)
(1)
secondary
stroke
oscillator
I
DEM
(
)
--------------
--------------------------
≈
≈
N
N
N
p
-----------
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA1532P/N1,112 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 GREENCHIP 2 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TEA1532PN | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 GREENCHIP 2 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TEA1532T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip SMPS control IC |
| TEA1532T/N1,118 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 GREENCHIP RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TEA1532T/N1-T | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 GREENCHIP RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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