IXYS
MXHV9910 1 5/31/07
Drawing No. HV991009 www.claremicronix.com
MXHV9910
Off-Line Hi
g
h Bri
g
htness LED Drive
r
Features:
• 8V to 450V Input Voltage Range
• >90% Efficiency
• Drives from 1 to Hundreds of LEDs in
Series/Parallel Combinations
• Regulated LED Drive Current
• Linear or PWM Brightness Control
• Resistor Programmable Oscillator Frequency
• SOIC-8 EP RoHS Compliant Package
Applications:
• Flat Panel Display RGB Backlighting
• Signage and Decorative LED Lighting
• DC/DC or AC/DC LED Driver Applications
General Description
The MXHV9910 is a high-efficiency off-line LED
driver. Manufactured using a dialectically isolated
process the MXHV9910 can operate from 8V to
450V. This highly versatile input operating voltage
enables a broad range of High Brightness (HB) LED
applications. The MXHV9910 drives an external
MOSFET at a fixed oscillator frequency set by an
external resistor. Peak constant current to an LED
string is maintained by modulating the MOSFET
GATE signal on and off through the external current
sense resistor connected to the CS input. Dimming
of and LED string is controlled by adjusting the duty
cycle of the PWM input, or applying a control
voltage from 0 to 250mV to the LD input.
Ordering Information
Part No. Description Qty
MXHV9910BE SOIC-8 EP Tube 100
MXHV9910BETR SOIC-8 EP Tape & Reel 2000
Functional Block Diagram and Typical Application
OSC
Voltage
Regulator
Voltage
Reference
PWM
Control
VDD
VIN
ROSC
LD
GND
PWM_D
GATE
CS
VDD
8 - 450 V
MXHV9910
MXHV9910 IXYS
Absolute Maximum Ratings
Parameter Symbol Maximum Units
VIN to GND -0.5 to +460 V
CS -0.3 to VDD+0.3 V
PD, PWM_D to GND -0.3 to VDD +0.3 V
GATE to GND -0.3 to VDD+0.3 V
VDDMAX 15 V
Thermal Resistance,
Junction to Ambient θJA
oC/W
Operating Ambient TA -40 to +85 oC
Storage Temperature TSTG -55 to +150 oC
Absolute Maximum Ratings are
stress ratings. Stresses in excess of
these ratings can cause permanent
damage to the device. Functional
operation of the device at these or
any other conditions beyond those
indicated in the operational sections
of this data sheet is not implied.
Exposure of the device to the
absolute maximum ratings for an
extended period may degrade the
device and affect its reliability.
Pin Description
Pin No. Pin Name Description
1 VIN Input Voltage 8V to 450V DC
2 CS LED Current Sense input. Internal current sense threshold is set at 250mV. The
external sense resistor sets the maximum LED current.
3 GND Device Ground
4 GATE External MOSFET Gate Driver Output
5 PWM D Low frequency PWM Dimming Control input with internal pull-down resistor.
6 VDD 7.8V regulated supply voltage output. Requires a storage capacitor to ground.
7 LD Linear Dimming. Sets the current limit lower than the internal 250mV threshold
at the current sense comparator.
8 ROSC Resistor to ground sets the oscillator / primary PWM frequency.
MXHV9910 2 5/31/07
Drawing No. HV991009 www.claremicronix.com
MXHV9910 IXYS
Electrical Characteristics
TA=25 oC unless otherwise specified.
Parameter Symbol Condition Min Typ Max Units
Input DC Voltage Range VINDC DC input voltage 8 450 V
Shut-Down mode supply
current IINsd PWM_D to GND
VIN = 15-450V 1 mA
Internal DC Voltage Regulator VDD VIN = 15-450V, IDD(ext) = 0
Gate output open. 7.8 V
Maximum voltage to VDD pin VDDmax External voltage applied to
the VDD pin 12
VDD current available for
external circuitry IDD(ext) VIN = Limited by package
power dissipation. 1.0 mA
PWM D input low voltage VIN = 8-450V 0.5 V
PWM D input high voltage VIN = 8-450V 2.4 V
PWM D pull-down resistance REN 135 kΩ
Current sense threshold voltage VCS(hi) 250 mV
GATE high output voltage VGATE(hi) IOUT = 10mA VDD
-0.3 V
GATE low output voltage VGATE(lo) IOUT = -10mA 0.3 V
Oscillator frequency fOSC ROSC = 400kΩ 64 kHz
Maximum Oscillator PWM Duty
Cycle DMAXhf 85
%
Linear Dimming Voltage
Range VLD VIN = 15V 0 250 mV
Current Sense Blanking
Interval TBLANK 400 nS
Delay from CS trip to GATE lo tDELAY 300 nS
GATE output rise time tRISE CGATE = 500pF 30 nS
GATE output fall time tFALL CGATE = 500pF 30 nS
MXHV9910 3 5/31/07
Drawing No. HV991009 www.claremicronix.com
MXHV9910 4 5/31/07
MXHV9910 IXYS
Drawing No. HV991009 www.claremicronix.com
World Wide Sales Offices
MXHV9910 5 5/31/07
IXYS
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Tel: 408-982-0700
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Check the IXYS Website for the local sales
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http://www.claremicronix.com
IXYS cannot assume responsibility for use of any circuitry other than circuitry
entirely embodied in this IXYS product. No circuit patent licenses nor indemnity
are expressed or implied. IXYS reserves the right to change the specification and
circuitry, without notice at any time. The products described in this document are
not intended for use in medical implantation or other direct life support
applications where malfunction may result in direct physical harm, injury or death
to a person.
Specification: MXHV9910
©Copyright 2006-2007, IXYS Corporation
All rights reserved. Printed in USA.
Drawing No. HV991009 www.claremicronix.com
