MX877R IXYS, MX877R Datasheet - Page 185

• Manufacturer Part Number: MX877R
• Description: IC DVR RELAY/LOAD 8CH 60V 28-QFN
• Manufacturer: IXYS

Specifications of MX877R

• Input Type: Parallel/Serial
• Number Of Outputs: 8
• Current - Output / Channel: 80mA
• Voltage - Supply: 6 V ~ 60 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• On-state Resistance: -
• Current - Peak Output: -

Integrated Circuits
XS839 / IXS839A / IXS839B
Synchronous Buck MOSFET Driver
(MOSFET Driver for High Efficiency DC to DC Power Converter Applications)
The IXS839 / IXS839A / IXS839B are
2 A source / 4 A sink synchronous buck
MOSFET drivers. These synchronous
buck MOSFET drivers are specifically
designed to drive two N-channel power
MOSFETs in a synchronous buck con-
verter. The high side driver is powered
via a bootstrapped power connection.
The driver is capable of 20 ns high-side
output, and 18 ns low-side output tran-
sition times driving a 3000 pF load. The
IXS839 and IXS839B incorporate an un-
der voltage lockout to prevent unintentio-
nal gate drive output during low voltage
conditions. The IXS83A/B includes ex-
ternal shutdown and low-side drive shut-
down features.
Synchronous Buck Gate
MX841 White LED Step-Up
Converter
The MX841 is a fixed frequency, constant
current source step-up DC/DC converter.
The output current is directly regulated
making the MX841 ideal for driving se-
ries connected white light emitting di-
odes (LED’s) in backlight applications.
The MX841 powers up to 3 series white
LED’s at 1.1 V, and 20 series / parallel
white LED’s at 5.0 V. The MX841 fea-
tures a 1.0 MHz switching frequency to
accommodate the use of small capaci-
tors and a small inductors necessary in
LED Driver
Ø
Ø
Part
Number
New
IXS 839S1
IXS 839AQ2
IXS 839BQ2
Part Number
New
MX 841
Voltage
Analog
Supply
Supply Voltage
5.5
5.5
5.5
V
5.5
V
Source
I
A
PK
2
2
2
Switch Current
Sink
I
A
PK
4
4
4
Peak
A
2
Simultaneous shutdown of both outputs
prevents rapid output capacitor dischar-
ge. The high-side turn-on delay is adjus-
table with an external capacitor added at
the DLY pin. The IXS839 / 839A / 839B
are designed to operate over a tempe-
rature range of -40°C to +85°C. The
IXS839 is available in an 8-lead SOIC,
the IXS839A and the IXS839B in a 10-
pin QFN.
Features
• Logic level gate drive compatible
• 2 A source, 4 A sink peak drive current
• Programmable high-side driver turn-on
size sensitive portable applications. Light
intensity and shutdown are convenient-
ly controlled by a single analog voltage.
Power efficiency and battery life are ex-
tended through the use of a high voltage,
low R
The MX841 is designed to operate over
a temperature range of -40°C to +85°C,
and is available in an SOIC-8 Package,
with or without an Exposed Pad in Tube
or on Tape and Reel. (Alternate package
types available upon request).
Floating
delay
Voltage
Supply
24
24
24
V
DS(ON)
Lockout
Voltage
N-channel MOSFET switch.
MHz
Under
f
typ
osc
Yes
Yes
1
Duty Cycle
Side Shutdown
Shutdown
down & Low
Driver Shut-
72.5
%
Switching Voltage Range
Protection
Conduction
Features
Protection
Over Lap,
Cross
V
DD
• Supports floating voltage for top driver
• IXS839 / 839B: under voltage sockout
• IXS839A/B: output shutdown, low side
• 10 µA shut down current
• 2 mA quiescent current (non-switching)
• Bootstrapped high side driver
• Cross-conduction protection
Applications
• Multiphase desktop CPU supplies
• Mobile CPU core voltage supplies
• High current / low voltage DC/DC
Features
• 1.1 V to 5.5 V Input Range
• 2 Amp Peak Switch Current
• High Efficiency > 80%
• 20 V Maximum Output with Over-
• LED Intensity Control
• 1.0 MHz Fixed Frequency Switching
• 8 Lead SOIC Package
Applications
• White LED Display Backlighting
- V
up to 24 V
shutdown inputs
synchronous Buck Converters
Voltage Protection
- Low Voltage: Mobile Phones, PDA’s,
- High Drive Current: Vehicle
20
MP3 Players, Digital Cameras
Instrumentation Panels
V
High-Side Driver
SCHOTTKY
Programmable
Turn-on Delay
Delay
X512
O-30...O-52
8-Pin SOP
O-30...O-52
Outlines on
8-pin SOP
10-pin QFN X543
10-pin QFN X543
Package
Outlines on
Package
8-pin SOP
X512
X512
Fig.
No.
Fig.
No.
163