MP3204 데이터 시트보기 (PDF) - Monolithic Power Systems
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MP3204 Datasheet PDF : 8 Pages
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TM
MP3204 – 6V, 1.3MHz WHITE LED DRIVER
ELECTRICAL CHARACTERISTICS (continued)
VIN = VEN = 5V, TA = +25°C, unless otherwise noted.
Parameters
Symbol Condition
Enable
EN Threshold
EN Threshold
EN Hysteresis
VEN Rising
VEN Rising, VIN = 2.5V
EN Input Bias Current
Feedback
VEN = 0V, 5V
FB Voltage
FB Input Bias Current
Output Switch
SW On-Resistance (4)
SW Current Limit
Thermal Shutdown (4)
VFB = 0.1V
RON
Duty Cycle = 60%
Notes:
4) Guaranteed by design, not tested.
Min Typ Max Units
1.0 1.35 1.6
V
0.8
V
90
mV
1
µA
94 104 114 mV
-600 -300
nA
0.5
Ω
350
mA
160
°C
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.
Feedback Input. The MP3204 regulates the voltage across the current sense resistor
3
FB 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.
Regulator On/Off Control Input. A high input at EN turns on the converter, and a low input
4
EN 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.
MP3204 Rev. 1.3
www.MonolithicPower.com
3
9/23/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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