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參數(shù)資料
| 型號： | TEA1541P |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SMPS control IC with synchronization function |
| 中文描述： | SWITCHING CONTROLLER, 28 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, MO-001, SOT97-1, SC504-8, DIP-8 |
| 文件頁數(shù)： | 6/19頁 |
| 文件大?。?/td> | 112K |
| 代理商： | TEA1541P |
2003 Aug 11
6
Philips Semiconductors
Product specification
SMPS control IC with
synchronization function
TEA1541
5
PINNING
SYMBOL
PIN
DESCRIPTION
V
CC
GND
CTRL
DEM
1
2
3
4
supply voltage
ground
control input
input from auxiliary winding
for demagnetization timing,
OVP and overpower
protection (OPP)
programmable current sense
input
gate driver output
high voltage safety spacer,
not connected
input for start-up current and
mains voltage recognition
I
sense
5
DRIVER
HVS
6
7
VIN
8
handbook, halfpage
TEA1541P
MDB084
1
2
3
4
VCC
GND
CTRL
DEM
VIN
HVS
DRIVER
Isense
8
7
6
5
Fig.3 Pin configuration.
6
FUNCTIONAL DESCRIPTION
The TEA1541 is intended as the controller for a compact
flyback converter for CRT monitor applications. The IC is
situated on the primary side of the output transformer.
Output power is determined by the current in the primary
winding. The voltage across an auxiliary winding in the
transformer is converted to a current by resistor R
DEM
and
used by the IC to derive the current in the primary winding.
This winding is also used for continuous mode protection,
overvoltage protection, and to power the IC after start-up.
The IC can operate in either synchronized or
unsynchronized mode. In synchronized mode, the IC
synchronizes the converter switching frequency to the
monitor line frequency to prevent interference.
Line synchronizing pulses are applied to pin CTRL.
Each operating cycle of the converter comprises a primary
stroke followed by a secondary stroke. During the primary
stroke, current flows in the primary winding.
The secondary stroke transfers the energy stored in the
transformer core to the secondary winding. In either
synchronized or unsynchronized mode, the primary stroke
only starts at the end of the secondary stroke when the
transformer is demagnetized to ensure zero switching
primary current. If no synchronizing pulses are present
(unsynchronized mode), the IC will operate at its minimum
switching frequency.
The IC has an internal frequency divider which allows it to
operate in synchronized mode at a lower frequency than
the synchronizing pulses supplied to pin CTRL by the
application. The limited frequency range allows an
economical design of the transformer.
In unsynchronized mode, when the power that is drawn
from the converter decreases, the converter switching
frequency also decreases. At very low power (standby)
levels, the frequency of the VCO decreases from 25 kHz
to the minimum value of approximately 6 kHz as shown by
the slope of Fig.4. In a typical application it is possible to
obtain an input power of less than 3 W with an output
power of 100 mW.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA1551T/N1,518 | 制造商:NXP Semiconductors 功能描述:OTHERS |
| TEA1552 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChipII SMPS control IC |
| 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 安裝風格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
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