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MP3204 Arkusz danych(PDF) 3 Page - Monolithic Power Systems

Numer części MP3204
Szczegółowy opis  1.3MHz Fixed Frequency 5 White LED Driver with Open LED Protection
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Producent  MPS [Monolithic Power Systems]
Strona internetowa  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP3204 Arkusz danych(HTML) 3 Page - Monolithic Power Systems

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MP3204 – 6V, 1.3MHz WHITE LED DRIVER
MP3204 Rev. 1.3
www.MonolithicPower.com
3
9/23/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
TM
ELECTRICAL CHARACTERISTICS (continued)
VIN = VEN = 5V, TA = +25°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Units
Enable
EN Threshold
VEN Rising
1.0
1.35
1.6
V
EN Threshold
VEN Rising, VIN = 2.5V
0.8
V
EN Hysteresis
90
mV
EN Input Bias Current
VEN = 0V, 5V
1
µA
Feedback
FB Voltage
94
104
114
mV
FB Input Bias Current
VFB = 0.1V
-600
-300
nA
Output Switch
SW On-Resistance
(4)
RON
0.5
SW Current Limit
Duty Cycle = 60%
350
mA
Thermal Shutdown
(4)
160
°C
Notes:
4) Guaranteed by design, not tested.
PIN FUNCTIONS
Pin #
Name
Description
1
SW
Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the power
inductor and output rectifier to SW. SW can swing between GND and 25V.
2
GND
Ground.
3
FB
Feedback Input. The MP3204 regulates the voltage across the current sense resistor
between FB and GND. Connect a current sense resistor from the bottom of the LED string
to GND. Connect the bottom of the LED string to FB. The regulation voltage is 104mV.
4
EN
Regulator On/Off Control Input. A high input at EN turns on the converter, and a low input
turns it off. When not used, connect EN to the input source for automatic startup. The EN
pin cannot be left floating.
5
OV
Over Voltage Input. OV measures the output voltage for open circuit protection. Connect
OV to the output at the top of the LED string.
6
IN
Input Supply. This pin must be locally bypassed.


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