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Quick Start Guide
This section summarizes for quick evaluation
the capabilities of, and differences between, the
MSL1061 and MSL1064.
The MSL1061 and MSL1064 are LED string drivers
with integrated boost regulators, which power, monitor,
and dim multiple LEDs at high efficiency for backlighting
and signage applications. Each MSL1061/64 contains six
outputs, each capable of sinking up to 30mA through a
string of series-connected LEDs.
How Many LEDs Can the Atmel LED
Drivers-MSL1061/64 Drive?
The MSL1061/64 includes 6 current sinks (STR0
through STR5) that each control the LED current of
multiple series-connected white LEDs. Any combination
of the 6-strings may be enabled, and not all the strings
need to be used.
Make sure 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 because the single boost
regulator supplies power to all six strings. Use a single
MSL1061/64 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 separate MSL1061/64s per LED color/chemistry
type. Each MSL1061/64 manages its integrated boost
regulator to optimize efficiency for its strings of identical
LEDs with matched electrical characteristics.
4
The maximum number of LEDs allowed in a string is
determined by the maximum voltage rating of the boost
regulator’s internal power FET, which is 50V minus 2V
for switching noise transients, leaving 48V. The FET
is protected by the OVP trip, which has a 2% voltage
tolerance, plus another 1% for the external setting
resistors R8 and R9 (Figure 6 on page 15) reducing the
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 headroom needed across
a string output’s current sink (600mV) to maintain
regulation, plus the boost regulator’s rectifier forward
voltage (normally under 900mV) leaves 46.5V - 0.6V -
0.9V = 45V maximum for the LED string. The number of
LEDs that the MSL1061/4 can drive per string is 45V /
{maximum LED forward voltage per LED}, or 12 LEDs
per string using 3.75V maximum forward voltage LEDs.
Differences Between Atmel LED
Drivers-MSL1061/64
Use the MSL1061 for applications where multiple
drivers are connected to a single I 2 C bus such as RGB
and RGGB lighting. Use the lower cost MSL1064 for
single-driver applications, and multi-driver applications
that do not require all drivers on the same I 2 C
interface (Table 1).
Atmel LED Drivers-MSL1061/MSL1064
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相关代理商/技术参数
MSL1061AV-R
功能描述:LED照明驱动器 6Str LED Dvr Dgtl 1.1MHz 48V r 1.5%
RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MSL1064
制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:6-string PWM LED Driver with Digitally Compensated, 1.1MHz, 48V Boost Regulator, ±1.5% Current Balance, I2C Interface
MSL1064AW
功能描述:LED照明驱动器 6Str PWM LED Dvr Dgt 1.1MHz 48V 1.5% I
RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MSL1064AW-R
功能描述:LED照明驱动器 6Str PWM LED Dvr Dgt 1.1MHz 48V1.5% I
RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MSL1064-TC
功能描述:LED照明驱动器 6Str PWM LED Dvr Dgt 1.1MHz 48V+/-1.5% I RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MSL106E
制造商:TE Connectivity 功能描述:
MSL-1-1/2
制造商:Cooper Bussmann 功能描述:
MSL-1-1/4
制造商:Cooper Bussmann 功能描述: