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參數(shù)資料
| 型號(hào)： | 1N4729A |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 參考電壓二極管 |
| 英文描述： | Zener Voltage Regulator Diode(3.6V齊納電壓，齊納穩(wěn)壓二極管) |
| 中文描述： | 3.6 V, 1 W, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE, DO-41 |
| 封裝： | HERMETIC SEALED, GLASS, CASE 59-10, 2 PIN |
| 文件頁(yè)數(shù)： | 7/8頁(yè) |
| 文件大?。?/td> | 61K |
| 代理商： | 1N4729A |
1N4728A – 1N4764A Series
http://onsemi.com
7
APPLICATION NOTE
Since the actual voltage available from a given zener
diode is temperature dependent, it is necessary to determine
junction temperature under any set of operating conditions
in order to calculate its value. The following procedure is
recommended:
Lead Temperature, T
L
, should be determined from:
T
L
=
θ
LA
P
D
+ T
A
.
θ
LA
is the lead-to-ambient thermal resistance (
°
C/W) and P
D
is the power dissipation. The value for
θ
LA
will vary and
depends on the device mounting method.
θ
LA
is generally 30
to 40
°
C/W for the various clips and tie points in common use
and for printed circuit board wiring.
The temperature of the lead can also be measured using a
thermocouple placed on the lead as close as possible to the
tie point. The thermal mass connected to the tie point is
normally large enough so that it will not significantly
respond to heat surges generated in the diode as a result of
pulsed operation once steady-state conditions are achieved.
Using the measured value of T
L
, the junction temperature
may be determined by:
T
J
= T
L
+
T
JL
.
T
JL
is the increase in junction temperature above the lead
temperature and may be found as follows:
T
JL
=
θ
JL
P
D
.
θ
JL
may be determined from Figure 3 for dc power
conditions. For worst-case design, using expected limits of
I
Z
, limits of P
D
and the extremes of T
J
(
T
J
) may be
estimated. Changes in voltage, V
Z
, can then be found from:
V =
θ
VZ
T
J
.
θ
VZ
, the zener voltage temperature coefficient, is found
from Figure 2.
Under high power-pulse operation, the zener voltage will
vary with time and may also be affected significantly by the
zener resistance. For best regulation, keep current
excursions as low as possible.
Surge limitations are given in Figure 5. They are lower
than would be expected by considering only junction
temperature, as current crowding effects cause temperatures
to be extremely high in small spots, resulting in device
degradation should the limits of Figure 5 be exceeded.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 1N4729A G | 制造商:Aeroflex 功能描述:COMMERCIAL ZENER VOLTAGE REGUL 制造商:Aeroflex / Metelics 功能描述:COMMERCIAL ZENER VOLTAGE REGULATOR DIODE - Bulk 制造商:Microsemi Corporation 功能描述:ZENER SGL 3.6V 5% 1W 2PIN DO-41 - Bulk |
| 1N4729A T/R | 功能描述:穩(wěn)壓二極管 DIODE ZENER 5 PCT TAPE AXIAL RoHS:否 制造商:Vishay Semiconductors 齊納電壓:12 V 電壓容差:5 % 電壓溫度系數(shù):0.075 % / K 齊納電流: 功率耗散:3 W 最大反向漏泄電流:3 uA 最大齊納阻抗:7 Ohms 最大工作溫度:+ 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-214AC 封裝:Reel |
| 1N4729A TR | 功能描述:DIODE ZENER 3.6V 1W DO41 制造商:central semiconductor corp 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 電壓 - 齊納（標(biāo)稱值）（Vz）:3.6V 容差:±5% 功率 - 最大值:1W 阻抗（最大值）（Zzt）:10 歐姆 不同?Vr 時(shí)的電流 - 反向漏電流:100μA @ 1V 不同 If 時(shí)的電壓 - 正向（Vf）:1.2V @ 200mA 工作溫度:-65°C ~ 200°C 安裝類型:通孔 封裝/外殼:DO-204AL，DO-41，軸向 供應(yīng)商器件封裝:DO-41 標(biāo)準(zhǔn)包裝:1 |
| 1N4729A,113 | 功能描述:穩(wěn)壓二極管 DIODE ZENER 5 PCT RoHS:否 制造商:Vishay Semiconductors 齊納電壓:12 V 電壓容差:5 % 電壓溫度系數(shù):0.075 % / K 齊納電流: 功率耗散:3 W 最大反向漏泄電流:3 uA 最大齊納阻抗:7 Ohms 最大工作溫度:+ 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-214AC 封裝:Reel |
| 1N4729A,133 | 功能描述:穩(wěn)壓二極管 Diode Zener Single 3.6V 5% 1W 2-Pin RoHS:否 制造商:Vishay Semiconductors 齊納電壓:12 V 電壓容差:5 % 電壓溫度系數(shù):0.075 % / K 齊納電流: 功率耗散:3 W 最大反向漏泄電流:3 uA 最大齊納阻抗:7 Ohms 最大工作溫度:+ 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-214AC 封裝:Reel |
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