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MP3389 Datasheet(PDF) 3 Page - Monolithic Power Systems

Part # MP3389
Description  12?밪tring, Step-up White LED Driver
PDF  16 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP3389 Datasheet(HTML) 3 Page - Monolithic Power Systems

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MP3389—12-STRING WHITE LED DRIVER WITH STEP-UP CONTROLLER
MP3389 Rev. 1.04
www.MonolithicPower.com
3
3/27/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN =12V, VEN = 5V, TA = +25°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Units
Operating Input Voltage
VIN
4.5
28
V
Supply Current (Quiescent)
IQ
VIN=12V, VEN=5V, no load with
switching
4
mA
Supply Current (Shutdown)
IST
VEN=0V, VIN=12V
2
μA
LDO Output Voltage
VCC
VEN=5V,
6V<VIN<28V,
0<IVCC<10mA
4.5
5
5.5
V
Input UVLO Threshold
VIN_UVLO
Rising Edge
3.4
3.9
4.3
V
Input UVLO Hysteresis
200
mV
EN High Voltage
VEN_HIGH
VEN Rising
1.6
V
EN Low Voltage
VEN_LOW
VEN Falling
0.6
V
STEP-UP CONVERTER
Gate
Driver
Impedance
(Sourcing)
VCC=5V,VGATE=5V
4
Ω
Gate
Driver
Impedance
(Sinking)
VCC=5V,IGATE=10mA
2
Ω
ROSC= 115kΩ
530
590
650
kHz
Switching Frequency
fSW
ROSC= 374kΩ
160
180
200
kHz
OSC Voltage
VOSC
1.18
1.23
1.28
V
Minimum On Time
TON_MIN
PWM Mode,
when no pulse skipping happens
100
ns
Maximum Duty Cycle
DMAX
90
%
ISENSE Limit
Max Duty Cycle
175
220
265
mV
Leading Edge Blanking Time
(6)
TLEB
250
ns
PWM DIMMING
DBRT Leakage Current
IDBRT_LK
-5
+5
μA
BOSC Frequency
FBOSC
CBOSC=2.2nF
1.2
1.6
2
kHz
BOSC Output Current
IBOSC
6.37
7.5
8.63
μA
LED CURRENT REGULATION
ISET Voltage
VISET
1.20
1.22
1.245
V
LEDX Average Current
ILED
RISET=40kΩ
29.6
30.5
31.4
mA
Current Matching
(5)
ILED=30.5mA
2.5
%
LEDX Regulation Voltage
VLEDX
ILED=30.5mA
410
550
690
mV
PROTECTION
OVP Over Voltage Threshold
VOVP_OV
Rising Edge
1.20
1.23
1.26
V



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