INTEGRATED CIRCUITS DIVISION
Driver Characteristics
Parameter
Rating
Units
Input Current
2.5
mA
Switching Speed (IF=5mA, MOSFET Input Capacitance=4nF)
td(on)
3
td(off1) (VGB=2V)
365
s
td(off2) (VGB=1V)
435
Features
• Requires No Load-side Power Supply
• Drives External Power MOSFET
• 570V Load Voltage
• Only 2.5mA Input LED Current to Drive External
MOSFET
• 3750Vrms Input-to-Output Isolation
• High Reliability
• Small 8-pin DIP and Surface Mount Packages
• Surface Mount Tape and Reel Version Available
Applications
Optically Isolated AC or DC Relays for:
• Industrial Controls
• Instrumentation
• Medical Equipment Isolation
• Electronic Switching
• I/O Subsystems
• Appliances
Figure 1. CPC1596 Application Diagram
1
NC
4
NC
CPC1596
2 LED+
3
LED-
CPC1596
570V, Optically Isolated
Load-Biased Gate Driver
Description
The CPC1596 is an optically isolated, load-biased
Gate Driver that requires no additional power supply to
bias the external MOSFET gates; in the off-state it
regulates the voltage drawn from the load (up to 570V)
down to 12.2V for internal use. It is specifically
designed for low duty cycle switching applications
such as an optically isolated DC relay using a single
MOSFET or an AC relay with two MOSFETs.
The CPC1596 accomplishes very fast MOSFET
turn-on by supplying charge stored in an external
capacitor to the MOSFET gate when input control
current is applied to the device’s LED. After the
MOSFET is turned on, photocurrent from the internal
optocoupler keeps the MOSFET active for as long as
sufficient input control current is applied assuring very
low-frequency operation. When the MOSFET is turned
off, the storage capacitor charges from the load
voltage via the regulated internal voltage in
preparation for the next turn-on.
Provided in a small, 8-pin package and requiring no
separate power supply, the CPC1596 provides a
flexible design solution that minimizes PCB real
estate.
Approvals
• UL Recognized Component: File E76270
• CSA Certified Component: Certificate 70196286
Ordering Information
Part
Description
CPC1596G 8-Pin DIP (50/Tube)
CPC1596GS 8-Pin Surface Mount (50/Tube)
CPC1596GSTR 8-Pin Surface Mount Tape & Reel (1000/Reel)
C7
A8
CST
G5
LOAD + VLOAD
Q1
B6
- VLOAD
DS-CPC1596-R01
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