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參數(shù)資料
| 型號(hào)： | ACPL-K342-000E |
| 元件分類： | 光電耦合器 |
| 英文描述： | 1 CHANNEL LOGIC OUTPUT OPTOCOUPLER |
| 封裝： | ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件頁(yè)數(shù)： | 9/19頁(yè) |
| 文件大?。?/td> | 333K |
| 代理商： | ACPL-K342-000E |
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17
Anti-Cross Conduction to Prevent Current Shoot Through and Determining Dead Time
The ACPL-H342 includes a Propagation Delay Difference (PDD = tPHL – tPLH ) specification to help prevent both the
high(Q1) and low(Q2) side power transistors from turning on at the same time. This “Anti-Cross” conduction feature
prevents large currents from flowing through the power transistors by ensuring tPHLMAX is faster than tPLHMIN. In another
words, the “Anti-Cross” feature will ensure one power transistor is turned off before the other is turned on.
A gate driver without Anti-Cross feature will for example has a PDDMIN of -350ns and a PDDMAX of 350ns. A positive
PDDMAX of 350ns would mean one transistor will be turn on before the other is off since tPHLMAX is longer than tPLHMIN.
This is shown in Figure 37. To prevent this and the shoot through current, the turn on of LED2 should be delayed (relative
to the turn off of LED1) so that under worst-case conditions, Q1 has just turned off when Q2 turns on. The amount of
delay to achieve this condition is equal to PDDMAX as shown in Figure 38.
RG
Q1
Q2
R
+ HVDC
-HVDC
AC
RG
R
High Side PWM
Low Side PWM
LED1
LED2
VOUT1
VOUT2
ILED1
ILED2
VOUT1
VOUT2
Q1 ON
Q2 OFF
Q1 OFF
Q2 ON
tPHLMAX
tPLHMIN
Shoot
Through
ILED1
ILED2
VOUT1
VOUT2
Q1 ON
Q2 OFF
Q1 OFF
Q2 ON
tPHLMAX
tPLHMIN
PDDMAX = tPHLMAX - tPLHMIN = 350 ns
Figure 38. Adding delay to prevent shoot through
Figure 37. Current shoot through without Anti-Cross feature
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ACPL-K342-060E | 功能描述:邏輯輸出光電耦合器 Optocoupler RoHS:否 制造商:Fairchild Semiconductor 絕緣電壓:4243 Vrms 輸出類型:Push-Pull 最大傳播延遲時(shí)間:500 ns 最大正向二極管電壓: 最大反向二極管電壓: 最大正向二極管電流: 最大連續(xù)輸出電流:2.5 A 最大功率耗散:100 mW 最大工作溫度:+ 100 C 最小工作溫度:- 40 C 封裝 / 箱體:SO-16 封裝:Tube |
| ACPL-K342-500E | 功能描述:邏輯輸出光電耦合器 Optocoupler RoHS:否 制造商:Fairchild Semiconductor 絕緣電壓:4243 Vrms 輸出類型:Push-Pull 最大傳播延遲時(shí)間:500 ns 最大正向二極管電壓: 最大反向二極管電壓: 最大正向二極管電流: 最大連續(xù)輸出電流:2.5 A 最大功率耗散:100 mW 最大工作溫度:+ 100 C 最小工作溫度:- 40 C 封裝 / 箱體:SO-16 封裝:Tube |
| ACPL-K342-560E | 功能描述:邏輯輸出光電耦合器 Optocoupler RoHS:否 制造商:Fairchild Semiconductor 絕緣電壓:4243 Vrms 輸出類型:Push-Pull 最大傳播延遲時(shí)間:500 ns 最大正向二極管電壓: 最大反向二極管電壓: 最大正向二極管電流: 最大連續(xù)輸出電流:2.5 A 最大功率耗散:100 mW 最大工作溫度:+ 100 C 最小工作溫度:- 40 C 封裝 / 箱體:SO-16 封裝:Tube |
| ACPL-K34T | 制造商:AVAGO 制造商全稱: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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