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參數(shù)資料
| 型號(hào)： | TEA2261 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Switch Mode Power Supply Controller(開關(guān)模式電源控制器) |
| 中文描述： | 開關(guān)電源控制器（開關(guān)模式電源控制器） |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 120K |
| 代理商： | TEA2261 |
SECURITY FUNCTIONS OF THE TEA2261
(see flow-chart below)
-
Undervoltage detection.
This protection works
in association with the starting device "V
CC
switch" (see paragraph Starting-mode - standby
mode). If V
CC
is lower than V
CC
stop (typically
7.4V) output pulses are inhibited, in order to avoid
wrong operation of the power supply or bad
power transistor drive.
-
Overvoltage detection.
If V
CC
exceeds V
CC
max
(typically 15.7V) output pulses are inhibited and
the external capacitor C
2
is charged as long as
V
CC
is higher than V
CC
stop. Restarting of the
power supply is obtained by reducing V
CC
below
V
CC
stop except if the voltage across C
2
reaches
V
C2
(typically 2.55V) (refer to "Restart of the
power supply" paragraph).In this last case, the
circuit is definitively stopped.
-
Current limitation of the power transistor.
The
current is measured by a shunt resistor. A double
threshold system is used :
- When the first threshold (V
IM1
) is reached, the
conduction of the power transistor is stopped
until the end of the period : a new conduction
signal is needed to obtain conduction again.
- Furthermore as long as the first threshold is
reached (it means during several periods), an
S.M.P.S.
starting
First
threshold reached
VIM1
V < 2.6V
V max
reached
Normal operating
C discharged
Definitive
stopping
N
N
Y
N
N
Y
Y
Y
N
Y
Pulse by pulse current
limiting C charged
C charged
S.M.P.S. stopped
V < 2.6V
Y
Reset C
discharged
2
N
Second
threshold reached
VIM2
2
SECURITY FLOW-CHART
(TEA2261)
external capacitor C
2
is charged. When the
voltage across the capacitor reaches V
C2
(typi-
cally 2.55V) the output is inhibited. This is called
the "repetitive overload protection". If the over-
load diseappears before V
C2
is reached, C
2
is
discharged, so transient overloads are toler-
ated.
- Second current limitation threshold (V
IM2
).
When this threshold is reached the output of the
circuit is immediatly inhibited. This protection is
helpfull in case of hard overload for example to
avoid the magnetization of the transformer.
-
Restart of the power supply
. After stopping due
to V
IM2
, V
CC
Max or V
CC
stop triggering, restart of
the power supply can be obtained by the normal
operating of the "V
CC
switch" V
CC
switch se-
quency from V
CC
stop to V
CC
start . After stopping
due to V
C2
threshold reaching, the circuit is de-
finitively stopped. In this case it is necessary to
reduce V
CC
below approximately 5V to reset the
circuit. From a practical point of view, it means
that the power supply has to be temporarily dis-
connected from any power source to get the
restart.
TEA2260 - TEA2261
7/9
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PDF描述 |
|---|---|
| TEA2262 | Switch Mode Power Supply Controller(開關(guān)模式電源控制器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA2261_03 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SWITCH MODE POWER SUPPLY CONTROLLER |
| TEA2262 | 功能描述:電流型 PWM 控制器 SMPS Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| TEA2R2M1CTR-0512P | 功能描述:鋁質(zhì)電解電容器 - 帶引線 16V 2.2uF 20% RoHS:否 制造商:Kemet 引線類型: 電容:220 uF 容差:20 % 電壓額定值:25 V 工作溫度范圍: 端接類型:Radial 外殼直徑:8 mm 外殼長(zhǎng)度:11 mm 引線間隔:5 mm 產(chǎn)品:General Purpose Electrolytic Capacitors 封裝:Bulk |
| TEA2R2M1HBK-0512P | 功能描述:鋁質(zhì)電解電容器 - 帶引線 50V 2.2uF 20% RoHS:否 制造商:Kemet 引線類型: 電容:220 uF 容差:20 % 電壓額定值:25 V 工作溫度范圍: 端接類型:Radial 外殼直徑:8 mm 外殼長(zhǎng)度:11 mm 引線間隔:5 mm 產(chǎn)品:General Purpose Electrolytic Capacitors 封裝:Bulk |
| TEA2R2M1HBK-0512S | 制造商:Surge Components Inc 功能描述:CAP ALUM 2.2UF 50V ?20% 2000LHRS 5 X 12 - Bulk |
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