N
E
W
P
R
O
D
U
C
T
B
R
I
E
F
IXI858/IXI859 Regulator/Gate Driver
INTERFACE IC PROVIDING ANALOG FUNCTIONS FOR MICROCONTROLLER IMPLEMENTATION
OF DIGITAL POWER SUPPLY FUNCTIONS / POWER FACTOR CORRECTION
January 2006
Description
The IXI858 and IXI859 Gate Driver/Regulator ICs are part of IXYS growing family of Interface
products. These ICs are designed to provide the needed analog functions required by
microcontrollers to implement offline digital power supply control, such as in Power Factor
Correction (PFC).
The IXI858/859 combine a gate drive, low voltage linear regulator and a charge pump function
for drive voltage generation as needed in these applications. These features make the
IXI858/859 invaluable for implementing microcontroller based PFC systems. The IXI858/859 can
be used in combination with a Depletion-Mode Power MOSFET such as the IXTY02N50D,
which can be used to create a constant current source to provide offline standby power at
Functional Block Diagram
lower cost with lower high line power consumption.
VCC
VCAP
8
The IXI858 is designed to support 5.0V digital systems with an on board 5.0V linear regulator,
while the IXI859 features a 3.3V linear regulator for lower voltage systems. In addition, both
versions feature logic level input signal compatibility, 60mA source and 120mA sink gate drive
output and a charge pump section meant to generate a 13V gate drive voltage.
1
Vclamp
UVLO
Vreg
VSUP
7
Q1
2
The growing trend of digital power management, with the use of standard microcontroller in
motor control, power supply, and PFC circuits require the interface, voltage gain and drive of
the IXI858/859 for digital power management. The IXI858 and 859 were optimized for cost
efficiency to support high volume applications such as dimmable ballast, non-dimmable ballast
and High Intensity Discharge (HID) lighting systems. The IXI858/859 are offered in a small
8-Lead SOIC surface mount package, with rated operation of -25°C to +125°C.
VOUT
GND
6
Chrg
Pump
Reg
13V
4
75k
GATE
5
IN
Features
Applications
•
•
•
•
•
Logic Level Gate Drive Compatible
60mA Source / 120mA Sink Minimum Gate Drive
5.0V or 3.3V Voltage Regulator
Charge Pump Regulator Stabilizes VCC Power Supply at 13V
UVLO Protection
•
•
•
•
•
Fluorescent Ballast
DALI Dimmable Fluorescent Ballast
HID
BLDC Drives
AC Drives
SUMMARY TABLE
Part Number
IXI858S1
Description
5.0V Version
5.0V Version
3.3V Version
3.3V Version
Package
Package Quantity
100 (Tube)
8-Pin SOIC
8-Pin SOIC
8-Pin SOIC
8-Pin SOIC
IXI858S1T/R
IXI859S1
2500 (Tape & Reel)
100 (Tube)
IXI859S1T/R
2500 (Tape & Reel)
