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ACPL-K30T-560E

P1-P3P4-P6P7-P9P10-P10
7
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
Load Capacitance, C
LOAD
- nF
Turn-O Time, T
OFF
- ms
Turn O Circuit
8
7
6
5
1
2
3
4
V
O
GND2
I
F
R
MONITOR
GND1
C
L
=1 nF
Pulse Gen.
Z
o
=50 Ω
freq: 100 Hz
I
F
V
O
T
ON
T
OFF
V
TLH
V
THL
0.01
0.10
1.00
10.00
100.00
1,000.00
1 10 100 1000
Turn-On Time, T
ON
- ms
Load Capacitance, C
LOAD
- nF
1 10 100 1000
I
F
= 5 mA
I
F
= 10 mA
I
F
= 20 mA
I
F
= 30 mA
I
F
= 50 mA
I
F
= 5 mA
I
F
= 10 mA
I
F
= 20 mA
I
F
= 30 mA
I
F
= 50 mA
Note: These are the test conditions:
T
A
= -40 °C, V
TLH
= 3.6 V, V
THL
=1.2 V
T
A
= 25 °C, V
TLH
=3.6 V, V
THL
=1.0 V
T
A
= 125 °C, V
TLH
= 3.6 V, V
THL
=0.8 V
Figure 9. Turn-O Time vs. Load Capacitance
Figure 11. Switching Time Test Circuit and Waveform
Figure 10. Turn-On Time vs. Load Capacitance
8
Application Information
The ACPL-K30T automotive photovoltaic (PV) driver is a
device that is paired with MOSFETs to form basic building
block of several types of application. It consists of an Al-
GaAs LED input that is optically coupled to a photovoltaic
diode array. This becomes a voltage source with galvanic
isolation. The advantage of photovoltaic driver is its sim-
ple design which does not require bias supply.
Basic Construction
As shown in Figure 12, the input side of the PV Driver is
LED driven. A current limiting resistor is required to limit
the current through the LED. Recommended input for-
ward current is 10 mA to 20 mA. The LED is optically cou-
pled through a photodiode stack (D1 to D12) consisting of
12 photodiodes connected in series. When current is driv-
en into the Light-Emitting Diode (LED) on the input side,
the light from the LED generates photo current on the
string of photodiodes to charge the gate of the MOSFETs,
generating a photo-voltage proportional to the number
of photodiodes, to switch and keep the power device on.
Figure 12. Basic Construction of Photovoltaic Driver
Figure 14. Photovoltaic Driver + Two Back-to-Back MOSFETs
PV Driver and MOSFET Congurations
The photovoltaic driver is a device that is combined with
high voltage MOSFETs to form a solid-state relay. The pho-
tovoltaic driver can be congured with a single MOSFET
or two MOSFETS (back to back) for bidirectional applica-
tion. Pin 5 is connected to the Gate and Pin 7 is connected
to the Source. Figure 13 and 14 are sample application cir-
cuits for the two congurations.
Turn-O Circuit
The photovoltaic driver has a built in turn-o circuit,
which decreases the turn-o time. This circuit instanta-
neously discharges the gate capacitance of MOSFETs once
the photovoltaic driver is turned o. The turn-o circuit is
activated when the photovoltaic voltage is collapsing.
The sequence of operation of the turn-o ciruit:
When LED is ON:
1. Q1 and Q2 are saturated.
2. SCR (Q3 and Q4) is disabled.
3. Photodiode array is connected to Gate and Source.
When LED is OFF:
1. Q1 and Q2 cease to conduct.
2. Photodiode array is disconnected from Gate and
Source.
3. SCR (Q3 and Q4) is triggered and Gate capacitance
(C
GS
) is discharged rapidly.
Turn-O Circuit
8
7
6
5
1
2
3
4
R
LED
GND
V
S
I
F
Turn O Circuit
8
7
6
5
1
2
3
4
R
LED
GND
V
S
I
F
Figure 13. Photovoltaic Driver + Single External MOSFET
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
G (V
O
+)
S (V
O
–)
Q1
Q2
Q3
Q4
Turn-o
Circuit
Anode
Cathode
R
LED
C
GS
2
3
5
7
9
Two PV Drivers in Series
For high voltage MOSFETs that require higher V
GS(TH)
, two
ACPL-K30T devices can be connected in series. Figure 16
shows the connection for this conguration. Two PV driv-
ers in series will give 2× higher V
OC
(Typical = 14 V) com-
pared with a single PV driver.
Turn-O Circuit
8
7
6
5
1
2
3
4
R
LED
Turn-O Circuit
8
7
6
5
1
2
3
4
Figure 16. Two PV Drivers in Series
V
OC
and MOSFET V
GS(TH)
ACPL-K30T has typical V
OC
of 7 V and minimum V
OC
of
4 V at 125 °C. This is sucient to drive most logic gate
level MOSFETs, with threshold voltages V
GS(TH)
of 4 V or
less. The V
OC
has a typical temperature coecient of -21
mV/°C. To serve as a guide in the design at dierent tem-
peratures, Figure 15 shows the ACPL-K30T's minimum V
OC
vs. the MOSFET's maximum V
GS(TH)
.
Figure 15. V
OC
minimum vs. MOSFET V
GS(TH)
maximum
-40 -20 0 20 40 60 80 100 120
ACPL-K30T V
OC (MIN)
0
1
2
3
4
5
6
7
8
9
10
V
oc
/ V
GS(TH)
- V
Temperature - °C
BSP300 V
GS(TH) MAX
BSP127 V
GS(TH) MAX
BSP125 V
GS(TH) MAX
P1-P3P4-P6P7-P9P10-P10

ACPL-K30T-560E

Mfr. #:
Buy ACPL-K30T-560E
Manufacturer:
Broadcom / Avago
Description:
Logic Output Optocouplers Auto Optocoupler IEC
Lifecycle:
New from this manufacturer.
Delivery:
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