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MP3385A 数据表(PDF) 5 Page - Monolithic Power Systems

部件名 MP3385A
功能描述  4-String, 80V Output, WLED Controller with I2C Interface
PDF  25 Pages
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制造商  MPS [Monolithic Power Systems]
网页  http://www.monolithicpower.com
标志 MPS - Monolithic Power Systems

MP3385A 数据表(HTML) 5 Page - Monolithic Power Systems

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MP3385A – 4-STRING WLED CONTROLLER WITH I
2C INTERFACE
MP3385A Rev. 1.01
www.MonolithicPower.com
5
8/29/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 12V, VEN = 5V, TA = 25°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Unit
Operating input voltage
VIN
4.5
33
V
Supply current (quiescent)
IQ
VIN = 12V, no switching
3
mA
Supply current (shutdown)
IST
VEN = 0V, VIN = 12V
1
μA
LDO output voltage
VCC
7V < VIN < 28V,
0 < IVCC < 10mA
5.4
6
6.3
V
VCC UVLO threshold
VIN_UVLO
Rising edge
3.7
4
4.3
V
VCC UVLO hysteresis
340
mV
EN high voltage
VEN_HIGH
VEN rising
1.5
V
EN low voltage
VEN_LOW
VEN falling
0.6
V
Step-Up Converter
Gate driver sourcing
impedance
VCC = 6V, VGATE = 6V
4
Ω
Gate driver sinking impedance
VCC = 6V, IGATE = 10mA
2
Ω
Switching frequency
fSW
FS3:0 bits = 0010b,
ROSC = 100kΩ
156
195
234
kHz
FS3:0 bits = 1001b,
ROSC = 100kΩ
672
820
967
kHz
OSC voltage
VOSC
ROSC = 100kΩ,
fSW = 900kHz
1.75
1.79
1.83
V
Maximum duty cycle
DMAX
90
%
Cycle-by-cycle IS pin current
limit
OCP2:0 bits = 000b
130
150
170
mV
OCP2:0 bits = 111b
465
500
535
mV
COMP source current limit
ICOMP SOLI 1V < COMP < 2.9V
75
μA
COMP sink current limit
ICOMP SILI
1V < COMP < 2.9V
15
μA
COMP transconductance
GCOMP
∆ICOMP = ±10µA
100
μA/V
Current Dimming
PWM input low threshold
VPWM_LO
VPWM falling
0.4
V
PWM input high threshold
VPWM_HI
VPWM rising
1.5
V
Dimming transfer point
MODE1:0 bits = 10b
25
%
MODE1:0 bits = 11b
50
%
Internal dimming frequency
20
23
kHz
Dimming ratio
Dimming resolution
0.098
%
DIM = 1111111111b
100
%



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