参数资料
型号: FODM3083R1
厂商: Fairchild Optoelectronics Group
文件页数: 8/13页
文件大小: 0K
描述: OPTOCOUPLER TRIAC 800V 4-SMD
标准包装: 1,000
电压 - 隔离: 3750Vrms
通道数: 1
电压 - 断路: 800V
输出类型: 交流过零三端双向可控硅开关
电流 - 栅极触发电流 (Igt)(最大): 5mA
电流 - 保持 (Ih): 300µA
电流 - DC 正向(If): 60mA
电流 - 输出 / 通道: 70mA
安装类型: 表面贴装
封装/外壳: 4-SMD
供应商设备封装: 4-SMD
包装: 带卷 (TR)
If suf?cient holding current is still ?owing through the
opto-TRIAC, the opto-TRIAC will turn-on and attempt
to carry the power TRIACs load. This situation typically
causes the opto-TRIAC to operate beyond its
maximum current rating, and product and resistor
failures typically result. For this reason, using an opto-
TRIAC to drive a three quadrant “snubberless” power
TRIAC is not recommended.
Power in the 360 ? resistor, when driving a sensitive
gate 4 quadrant power TRIAC:
I GT = 20mA
V GT = 1.5V
DF = 0.6%
P = (I GT +V GT / 330 ? ) 2 x 360 ? x DF
P = (20mA + 1.5 / 330 ? ) 2 *x 360 ? x 0.6% = 1.3mW
A 1/4 watt resistor is more than adequate for both the
360 ? and 330 ? resistors.
?2006 Fairchild Semiconductor Corporation
FODM3062, FODM3063, FODM3082, FODM3083 Rev. 1.0.9
8
The real power in the snubber resistor is based upon
the integral of the power transient present when the
load commutes. A fast commuting transient may allow
a peak current of 4A to 8A in the snubbing ?lter.
For best results, the capacitor should be a non-
polarized AC unit with a low ESR. The 39 ? series
resistor sets a time constant and limits the peak
current. For a resistive load with a power factor near
unity, the commutating transients will be small. This
results in a very small peak current given the 0.01μF
capacitor’s reactance. Normally, for factional horse-
power reactive loads, the resistor found in the snubber
circuit will have a power rating from 1/2W to 2W. The
resistor should be a low inductance type to adequately
?lter the high frequency transients.
www.fairchildsemi.com
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