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參數(shù)資料
| 型號： | TEA1532T |
| 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, PDSO8 |
| 封裝： | 3.90 MM, PLASTIC, SO-8 |
| 文件頁數(shù)： | 11/27頁 |
| 文件大小： | 147K |
| 代理商： | TEA1532T |
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9397 750 13113
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 28 May 2004
11 of 27
Philips Semiconductors
TEA1532
GreenChip
II SMPS control IC
When pin DEM is grounded (CCM), the brown-out protection is disabled. In this case the
duty cycle is limited to 0.7, so at low mains voltage the on-time is limited and therefore the
dissipation in the FET is limited.
7.15 OverTemperature Protection (OTP)
The IC provides accurate temperature protection. The IC will stop switching when the
junction temperature exceeds the thermal shutdown temperature. When V
CC
drops to
V
UVLO
, capacitor C
VCC
will be recharged to the V
start
level, however switching will not
restart. Subsequently, V
CC
will drop again to V
UVLO
, etc..
Operation only recommences when V
CC
drops below a level of about 4.5 V (typically,
when V
mains
is disconnected for a short period).
7.16 Soft start-up (pin SENSE)
To prevent transformer rattle at start-up or during hiccup, the transformer peak current is
slowly increased by the soft start function. This can be achieved by inserting a resistor
and a capacitor between pin SENSE (pin 6) and sense resistor R
sense
. An internal current
source charges the capacitor to V
sense
= I
ss
×
R
ss
(about 0.5 V maximum).
The start level and the time constant of the increasing primary current level can be
adjusted externally by changing the values of R
ss
and C
ss
.
The charging current I
SS
will flow as long as the voltage on pin SENSE is
below approximately 0.5 V. If the voltage on pin SENSE exceeds 0.5 V, the soft start
current source will start limiting current I
ss
. At V
start
, the I
ss
current source is completely
switched off; see
Figure 9
.
Since the soft start current I
ss
is supplied from pin DRAIN, the R
ss
value will not affect V
CC
current during start-up.
Fig 9.
Soft start-up.
I
primary(max)
V
------------------------------------------
I
R
×
(
)
–
R
sense
=
τ
R
ss
C
ss
×
=
C
ss
R
ss
SENSE
R
sense
I
ss
V
ocp
start-up
mgu237
6
0.5 V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TEA1533AP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip SMPS control IC |
| TEA1533AP/N1,112 | 功能描述:電壓模式 PWM 控制器 SMPS LOW STANDBY RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| TEA1533APN | 功能描述:電壓模式 PWM 控制器 SMPS LOW STANDBY GREENCHIP RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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