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I NTEGRATED C IRCUITS D IVISION
1. Specifications
1.1 Package Pinout
1.2 Pin Description
MXHV9910
Pin#
1
Name
V I N
Description
Input voltage
LED Current Sense input. Internal current
V IN
CS
1
2
8
7
R T
LD
2
3
CS
GND
sense threshold is set at 250mV. The external
sense resistor sets the maximum LED current.
Device Ground
4
GATE
External MOSFET gate driver output
GND
GATE
3
4
6
5
V DD
P W MD
5
PWMD
Low-frequency PWM dimming control input with
internal pull-down resistor.
Regulated supply voltage output. Requires a
6
7
8
EP
V DD
LD
R T
-
storage capacitor to GND. Can be overdriven by
external voltage applied to V DD .
Linear Dimming. Apply a voltage less than
V CS(high) to dim the LED(s).
Resistor to GND sets the oscillator/primary
PWM frequency.
Electrical and thermal conductive pad on the
bottom of the MXHV9910BE. Connect this pad
to ground, and provide sufficient thermal
coupling to remove heat from the package.
1.3 Absolute Maximum Ratings
Parameter
Input Voltage to GND
Inputs & Outputs Voltage to GND
V DD , Externally Applied
Symbol
V I N
CS, LD, PWMD, GATE
V DD.EXT
Maximum
-0.5 to +460
-0.3 to V DD +0.3
15
Unit
V
V
V
Power Dissipation
SOIC-8 With Thermal Tab
SOIC-8 W/O Thermal Tab
Maximum Junction Temperature
Operating Temperature
Junction Temperature (Operating)
Storage Temperature
P D
T Jmax
T A
T J
T STG
2.5
0.975
150
-40 to +85
-40 to +150
-55 to +150
W
W
°C
°C
°C
°C
Electrical absolute maximum ratings are at 25°C.
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 conditions
beyond those indicated in the operational sections of this
data sheet is not implied.
R03
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