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| 型号： | ACPL-K342-000E |
| 元件分类： | 光电耦合器 |
| 英文描述： | 1 CHANNEL LOGIC OUTPUT OPTOCOUPLER |
| 封装： | ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件页数： | 11/19页 |
| 文件大小： | 333K |
| 代理商： | ACPL-K342-000E |
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Data subject to change. Copyright 2005-2010 Avago Technologies. All rights reserved.
AV02-2526EN - June 11, 2010
LED Input Current Hysteresis
The detector has optical receiver input stage with built in
Schmitt trigger to provide logic compatible waveforms,
eliminating the need for additional wave shaping. The
hysteresis (Figure 12) provides differential mode noise
immunity and minimizes the potential for output signal
chatter.
Under Voltage Lockout
The ACPL-H342 Under Voltage Lockout (UVLO) feature is
designed to prevent the application of insufficient gate
voltage to the IGBT by forcing the ACPL-H342 output low
during power-up. IGBTs typically require gate voltages of
15 V to achieve their rated VCE(ON) voltage. At gate voltages
below 13 V typically, the VCE(ON) voltage increases dra-
matically, especially at higher currents. At very low gate
voltages (below 10 V), the IGBT may operate in the linear
region and quickly overheat. The UVLO function causes
the output to be clamped whenever insufficient operating
supply (VCC) is applied. Once VCC exceeds VUVLO+ (the pos-
itive-going UVLO threshold), the UVLO clamp is released
to allow the device output to turn on in response to input
signals.
Thermal Model for ACPL-H342/K342 Stretched SO8
Package Optocoupler
Definitions:
R11: Junction to Ambient Thermal Resistance of LED due
to heating of LED
R12: Junction to Ambient Thermal Resistance of LED due
to heating of Detector (Output IC)
R21: Junction to Ambient Thermal Resistance of Detector
(Output IC) due to heating of LED.
R22: Junction to Ambient Thermal Resistance of Detector
(Output IC) due to heating of Detector (Output IC).
P1: Power dissipation of LED (W).
P2: Power dissipation of Detector / Output IC (W).
T1: Junction temperature of LED (°C).
T2: Junction temperature of Detector (°C).
TA: Ambient temperature.
Ambient Temperature: Junction to Ambient Thermal Re-
sistances were measured approximately 1.25cm above
optocoupler at ~23°C in still air
Thermal Resistance
°C/W
R11
311
R12, R21
111
R22
168
This thermal model assumes that an 8-pin single-channel
plastic package optocoupler is soldered into a 7.62 cm x
7.62 cm printed circuit board (PCB) per JEDEC standards.
The temperature at the LED and Detector junctions of the
optocoupler can be calculated using the equations below.
T1 = (R11 * P1 + R12 * P2) + TA
(1)
T2 = (R21 * P1 + R22 * P2) + TA
(2)
Using the given thermal resistances and thermal model
formula in this datasheet, we can calculate the junction
temperature for both LED and the output detector. Both
junction temperature should be within the absolute
maximum rating.
For example, given P1 = 45 mW, P2 =210 mW, Ta = 85°C:
LED junction temperature,
T1 = (R11 * P1 + R12 * P2) + TA
= (311 * 0.045 + 111 * 0.210) + 85
= 122°C
Output IC junction temperature,
T2 = (R21 x P1 + R22 x P2) + TA
= (111 *0.045 + 168 * 0.210) + 85
= 125°C
T1 and T2 should be limited to 125°C based on the board
layout and part placement.
Related Application Noted
AN5336 – Gate Drive Optocoupler Basic Design for IGBT/
MOSFET
AN1043 – Common-Mode Noise: Sources and Solutions
AN02-0310EN – Plastics Optocouplers Product ESD and
Moisture Sensitivity
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相关代理商/技术参数 |
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| ACPL-K342-060E | 功能描述:逻辑输出光电耦合器 Optocoupler RoHS:否 制造商:Fairchild Semiconductor 绝缘电压:4243 Vrms 输出类型:Push-Pull 最大传播延迟时间:500 ns 最大正向二极管电压: 最大反向二极管电压: 最大正向二极管电流: 最大连续输出电流:2.5 A 最大功率耗散:100 mW 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:SO-16 封装:Tube |
| ACPL-K342-500E | 功能描述:逻辑输出光电耦合器 Optocoupler RoHS:否 制造商:Fairchild Semiconductor 绝缘电压:4243 Vrms 输出类型:Push-Pull 最大传播延迟时间:500 ns 最大正向二极管电压: 最大反向二极管电压: 最大正向二极管电流: 最大连续输出电流:2.5 A 最大功率耗散:100 mW 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:SO-16 封装:Tube |
| ACPL-K342-560E | 功能描述:逻辑输出光电耦合器 Optocoupler RoHS:否 制造商:Fairchild Semiconductor 绝缘电压:4243 Vrms 输出类型:Push-Pull 最大传播延迟时间:500 ns 最大正向二极管电压: 最大反向二极管电压: 最大正向二极管电流: 最大连续输出电流:2.5 A 最大功率耗散:100 mW 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:SO-16 封装:Tube |
| ACPL-K34T | 制造商:AVAGO 制造商全称:AVAGO TECHNOLOGIES LIMITED 功能描述:Automotive 2.5 A Peak High Output Current MOSFET Gate Drive Optocoupler with Rail-to-Rail Output Voltage in Stretched SO8 |
| ACPL-K34T-000E | 制造商:Avago Technologies 功能描述:OPTOCOUPLER, MOSFET, 5000VRMS |
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