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參數(shù)資料
| 型號： | U2102B |
| 英文描述： | Multifunction Timer |
| 中文描述： | 多功能定時(shí)器 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 205K |
| 代理商： | U2102B |
U2102B
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
6 (16)
Voltage Monitoring
While the operating voltage is being built up or reduced,
uncontrolled conditions or output pulses of insufficient
amplitude are being suppressed by the internal moni-
toring circuit. All latches in the circuit, the divider and the
control logic are reset. When the supply voltage is
applied, the enable threshold (clamp voltage) of approxi-
mately 16 V must be reached so that the circuit is enabled.
The circuit is reset at approximately 11 V if the supply
voltage breaks down. A further threshold is activated in
reverse phase control mode. If the supply voltage breaks
down here after enabling of the circuit, the output stage
is switched off at approximately 12.5 V, while the other
parts of the circuit are not affected. The output stage can
then be switched on again only in the following half-
wave. As a result, the residual phase angle remains just
large enough, (e.g., in two-wire systems), so that the
circuit can still be properly supplied with power. In all
operating modes, a single operating cycle is started after
the supply voltage is applied, independently of the trigger
inputs, in order to immediately demonstrate the overall
function.
Chip Temperature Monitoring
The circuit possesses an integrated chip temperature
monitoring circuit which disables the output stage when
a temperature of approximately 140
°
C is reached. The
circuit is enabled again only after cooling down and addi-
tionally switched “off and on” of the operating voltage.
Reverse Phase Control, Pins 2, 3, 4
In the case of normal phase controls, e.g., with a triac, the
load current is switched ON only at a certain phase angle
after the zero crossing of the mains voltage. In the
following zero crossing of the current, the triac gets extin-
guished (switched-off) automatically. Reverse phase
control differs from this in that the load current is always
switched-on by a semiconductor switch (e.g., IBGT) at
the zero crossing of the mains voltage and then switched
back off again after a certain phase angle . This has the
advantage that the load current always rises with the
mains voltage in a defined manner and thus keeps the
required interference suppression to a minimum.
The charging current for the capacitor C
3
at Pin 2 is set
with the resistor R
3
at Pin 3. When the synchronization
circuit recognizes a zero crossing, an increased charging
current I
2
4
I
3
is enabled which then charges C
3
up
to
0.45 V. The output stage is switched-on at this value
and the charging current for C
3
is reduced to I
2
= I
3
. Since
the actual zero crossing of the supply voltage occurs later
than recognized by the circuit, the load current starts to
flow quite close to the exact zero crossing of the supply
voltage. While the output stage is switched-on C
3
is
charged until the control voltage, set externally at Pin 4,
is reached. When this condition is reached, the output
stage is switched off and C
3
is charged again with the
increased current (I
2
= 4
charging current is switched off at this point and C
3
is
discharged internally. The whole process then starts again
when the circuit recognizes another zero crossing (see
figure 6).
I
3
) to V
2
5.5 V. The
t
t
t
94 8290 e
V
mains
1.1
V
Ref
V
4
V
Ref
0.09
V
14
V
2
Figure 6. Signal characteristics of reverse phase control
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參數(shù)描述 |
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| U2102B-M | 功能描述:IC TIMER MULTI IGBT/MOSF 16-DIP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專用 系列:- 標(biāo)準(zhǔn)包裝:1,500 系列:- 類型:時(shí)鐘緩沖器/驅(qū)動(dòng)器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT |
| U2102B-MFP | 功能描述:IC TIMER MULTI IGBT/MOSF 16-SOIC RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專用 系列:- 標(biāo)準(zhǔn)包裝:1,500 系列:- 類型:時(shí)鐘緩沖器/驅(qū)動(dòng)器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT |
| U2102B-MFPG3 | 功能描述:IC TIMER MULTI IGBT/MOSF 16-SOIC RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專用 系列:- 標(biāo)準(zhǔn)包裝:1,500 系列:- 類型:時(shí)鐘緩沖器/驅(qū)動(dòng)器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT |
| U2102B-MFPG3Y | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 Sensor Ctrl. Timer for IGBT/Power FET RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| U2102B-MFPY | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 Sensor Ctrl. Timer for IGBT/Power FET RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
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