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參數(shù)資料
| 型號： | 5962-0420401HPX |
| 英文描述： | 2.0 Amp Output Current IGBT Gate Drive Optocoupler |
| 中文描述： | 2.0安培輸出電流IGBT柵極驅(qū)動光電耦合器 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 194K |
| 代理商： | 5962-0420401HPX |
12
Applications Information
Eliminating Negative IGBT Gate Drive
To keep the IGBT firmly off, the
HCPL-5120 has a very low
maximum V
OL
specification of
0.5 V. The HCPL-5120 realizes
this very low V
OL
by using a
DMOS transistor with 1
(typical) on resistance in its
pull down circuit. When the
HCPL-5120 is in the low state,
the IGBT gate is shorted to the
emitter by R
g
+ 1
. Minimizing
R
g
and the lead inductance from
the HCPL-5120 to the IGBT
gate and emitter (possibly by
mounting the HCPL-5120 on a
small PC board directly above
the IGBT) can eliminate the
need for negative IGBT gate
drive in many applications as
shown in Figure 25. Care should
be taken with such a PC board
design to avoid routing the
IGBT collector or emitter traces
close to the HCPL-5120 input
as this can result in unwanted
coupling of transient signals
into the HCPL-5120 and
degrade performance. (If the
IGBT drain must be routed near
the HCPL-5120 input, then the
LED should be reverse-biased
when in the off state, to prevent
the transient signals coupled
from the IGBT drain from
turning on the HCPL-5120.)
Selecting the Gate Resistor (R
g
) to
Minimize IGBT Switching Losses.
Step 1: Calculate R
g
Minimum from
the I
OL
Peak Specification.
The IGBT and R
g
in Figure 26
can be analyzed as a simple RC
circuit with a voltage supplied
by the HCPL-5120.
(V
- V
- V
)
R
g
=
–––––––––––––––––
I
OLPEAK
(V
– V
– 2V)
=
––––––––––––––––––
I
OLPEAK
(15 V + 5 V – 2V)
=
–––––––––––––––––––
2.5 A
= 7.2
≈
8
The V
OL
value of 2 V in the
previous equation is a
conservative value of V
OL
at the
peak current of 2.5A (see Figure
6). At lower R
g
values the
voltage supplied by the HCPL-
5120 is not an ideal voltage
step. This results in lower peak
currents (more margin) than
predicted by this analysis. When
negative gate drive is not used
V
EE
in the previous equation is
equal to zero volts
Step 2: Check the HCPL-5120 Power
Dissipation and Increase R
g
if
Necessary.
The HCPL-5120 total power
dissipation (P
T
) is equal to the
sum of the emitter power (P
E
)
and the output power (P
O
):
P
T
= P
E
+ P
O
P
E
= I
F
V
F
Duty Cycle
P
O
= P
O(BIAS)
+ P
O (SWITCHING)
= I
CC
(V
CC
- V
EE
) + ESW(R
g
,
Q
g
)
f
For the circuit in Figure 26
with I
F
(worst case) = 18 mA,
R
g
= 8
, Max Duty Cycle = 80%,
Q
g
= 500 nC, f = 20 kHz and T
A
max = 125
°
C:
P
E
= 18 mA
1.8 V
0.8 = 26 mW
P
O
= 4.25 mA
20 V + 1.0
μ
J
20
kHz
= 85 mW + 20 mW
= 105 mW
< 112 mW (P
O(MAX)
@ 125
°
C
= 250 mW - 23
°
C
6 mW/
°
C)
The value of 4.25 mA for I
CC
in
the previous equation was
obtained by derating the I
CC
max of 5 mA (which occurs at -
55
°
C) to I
CC
max at 125
°
C.
Since P
O
for this case is less
than P
O(MAX)
, R
g
of 8
is
appropriate.
Figure 25. Recommended LED Drive and Application Circuit
+ HVDC
3-PHASE
AC
- HVDC
0.1 μF
V
CC
= 18 V
1
3
+
_
2
4
8
6
7
5
270
CONTROL
INPUT
Rg
Q1
Q2
74XXX
OPEN
COLLECTOR
+5 V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 5962-0420401HPA | 2.0 Amp Output Current IGBT Gate Drive Optocoupler |
| 5962-0420401HPC | 2.0 Amp Output Current IGBT Gate Drive Optocoupler |
| 5962-0420401HXA | 2.0 Amp Output Current IGBT Gate Drive Optocoupler |
| 5962-0420401HYA | 2.0 Amp Output Current IGBT Gate Drive Optocoupler |
| 5962-0420401HYC | 2.0 Amp Output Current IGBT Gate Drive Optocoupler |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 5962-0420401HXA | 功能描述:邏輯輸出光電耦合器 2.0A IGBT Gate Drive Hermetically sealed 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 |
| 5962-0420401HYA | 功能描述:邏輯輸出光電耦合器 2.0A IGBT Gate Drive Hermetically sealed 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 |
| 5962-0420401HYC | 功能描述:邏輯輸出光電耦合器 2.0A IGBT Gate Drive Hermetically sealed 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 |
| 5962-0420501HPA | 功能描述:邏輯輸出光電耦合器 0.5A IGBT Gate Drive Hermetically sealed 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 |
| 5962-0420501HPC | 功能描述:邏輯輸出光電耦合器 0.5A IGBT Gate Drive Hermetically sealed 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 |
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