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PDF MSL1060AW Data sheet ( Hoja de datos )
| Número de pieza | MSL1060AW | |
| Descripción | 6-string PWM LED Driver | |
| Fabricantes | ATMEL Corporation | |
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Atmel LED Driver-MSL1060
6-string PWM LED Driver with Digitally Compensated, 1.1MHz,
48V Boost Regulator and ±1.5% LED String Current Balance
Datasheet
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Atmel LED Driver-MSL1060
6-string PWM LED Driver with Digitally Compensated, 1.1MHz,
48V Boost Regulator and ±1.5% LED String Current Balance
Quick Start Guide
This section summarizes the capabilities of, and
differences between, the MSL1060 and the similar Atmel
MSL1061 and Atmel MSL1064 with I²C interfaces.
The MSL1060 and MSL1061/64 are LED string drivers
with integrated boost regulators, which power, monitor,
and dim multiple LEDs at high efficiency for backlighting
and signage applications. Each MSL1060/61/64
contains six outputs, each capable of sinking up to
30mA through a string of series-connected LEDs
dropping up to 45V; 8W of lighting power.
How Many LEDs Can the Atmel LED
Drivers-MSL1060/61/64 Drive?
The MSL1060/61/64 includes six current sinks
(STR0 through STR5) that each control the LED
current of multiple, series-connected, white LEDs. Any
combination of the six strings may be enabled, and not
all the strings need to be used.
It is important that each enabled string contain the
same number of the same type of LED so that the
total voltage drop for each string is the same. This is
necessary because there is only one boost regulator
(and, therefore, only one LED supply) available to serve
all six strings. Use a single MSL1060/61/64 to drive
multiple LEDs of a single color/chemistry, such as white
LED backlighting or single-color signage. For multicolor
applications (e.g. RG, RGB, RGGB, RGBA), use a
separate MSL1060/61/64 per LED color/chemistry
type. Each MSL1060/61/64 manages its integrated
boost regulator to optimize efficiency for its strings of
identical LEDs with matched electrical characteristics.
The 48V maximum voltage rating of the boost
regulator’s internal power FET determines the
maximum number of LEDs allowed in a string. The
overvoltage protection (OVP) circuit protects the FET
as well as external components. The accuracy of the
OVP threshold is 2% plus another 1% for the external
setting resistors, R8 and R9 (Figure 16 on page 15)
reducing the operating maximum voltage to 46.5V. The
total voltage needed to drive a string is the forward
voltage drop across the desired LED strings, plus the
600mV headroom needed the string’s output current
sink (600mV) to keep it in regulation. Since the FET
voltage is higher than the boost voltage by the rectifier
forward voltage drop, the available voltage for LEDs is
approximately 46.5V - 0.6V - 0.9V or 45V. Thus the
MSL1060 can drive up to 12 series LEDs as long as the
LED forward voltage is less than 3.75V.
Differences Between Atmel LED
Drivers-MSL1060, MSL1061 and MSL1064
Use the MSL1061 in applications where one or more
LED drivers are directly controlled by a PWM input
signal. The PWM input signal globally controls the LED
dimming. Use the MSL1061/64 for applications where
the LED drivers communicate by an I²C/SMB interface.
The MSL1064 has a single slave address, while the
MSL1061 has four available addresses which allows
communication to all four LED drivers on the same I²C
interface (Table 1).
Atmel LED Driver-MSL1060
5
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5 Page 
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Atmel LED Driver-MSL1060
6-string PWM LED Driver with Digitally Compensated, 1.1MHz,
48V Boost Regulator and ±1.5% LED String Current Balance
PARAMETER
CONDITIONS AND NOTES
DC ELECTRICAL CHARACTERISTICS - LOGIC I/OS
EN logic high input voltage
EN logic low input voltage
EN logic input current
EN logic input series resistance
EN logic input Zener clamp
PWM logic high input voltage
PWM logic low input voltage
FLTB output low voltage
IADJ, FLTB, PWM leakage current
VEN = 3V
Between EN input and internal Zener clamp
Sinking 1mA
MIN
2.3
2
TYP
MAX
UNIT
10.5
5.8
0.1
0.8
20
0.9
0.2
10
V
V
µA
kΩ
V
V
V
V
µA
PARAMETER
CONDITIONS AND NOTES
DC ELECTRICAL CHARACTERISTICS - BOOST REGULATOR
SW on resistance
SW current limit
OSC regulation voltage
STR0-STR5 boost regulation voltage
ISW = 100mA
R4 = 115kΩ ±1%
R5 = 100kΩ, PWM=100% (Note 6)
OVP threshold
OVP hysteresis
VOVP rising
OVP leakage current
VOVP = 3.6V
MIN
TYP
MAX
UNIT
1.195
1.25
0.4
2
1.22
600
1.28
60
0.6
1.245
1.31
1
Ω
A
V
mV
V
mV
µA
PARAMETER
CONDITIONS AND NOTES
AC ELECTRICAL CHARACTERISTICS
PWM input frequency
PWM input duty ratio
Boost regulator switching frequency R4 = 115kΩ ±1%
Boost regulator maximum duty ratio R4 = 115kΩ ±1%
Boost regulator startup time
MIN
TYP
MAX
UNIT
0 50 kHz
0 100 %
0.99
1.1
1.21
MHz
89 92
%
100 120 ms
Note 1. All parameters are tested at TA=25°C, unless otherwise noted. Specifications at temperature are guaranteed by design
Note 2. Subject to thermal dissipation characteristics of the device
Note 3. When mounted according to JEDEC JEP149 and JESD51-12 for a two-layer PCB, θJA = 24.1°C/W and θJC = 2.7°C/W
Note 4. Guaranteed by design and characterization. Not production tested
Note 5. STR0 to STR5 current matching is the difference between any one string current and the average of all string currents divided
by the average of all string currents
Note 6. The MSL1060 selects the active string (STR0 through STR5) with the lowest voltage to control the boost regulator voltage
Atmel LED Driver-MSL1060
11
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