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SM8200 数据表(PDF) 1 Page - M.S. Kennedy Corporation

部件名 SM8200
功能描述  High Efficiency Step Down LED Driver
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制造商  MSK [M.S. Kennedy Corporation]
网页  http://www.mskennedy.com
标志 MSK - M.S. Kennedy Corporation

SM8200 数据表(HTML) 1 Page - M.S. Kennedy Corporation

  SM8200 Datasheet HTML 1Page - M.S. Kennedy Corporation  
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High Efficiency Step Down LED Driver
GENERAL DESCRIPTION
SM8200
FEATURES
● Wide input operating voltage range from 8V to 48V
● Low current sense threshold of 300mV
● Power efficiency up to 94%
● Application from a few mA to more than 1A output
● LED string from one to hundreds
● Excellence Control scheme (CrM)
● LED short-circuit protection (SCP)
● LED open-voltage protection (OVP)
● Junction over-temperature shutdown protection
● Cycle-by-cycle current limit
● Providing SOT-23 6-lead Package
● MR16
● High power LED drivers
● Signage and decorative LED lighting
● Automotive or Industrial
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
www.samhop.com.tw
1
Rev. 1.0 @ 2011/12
The SM8200 is a High efficiency step-down LED Driver,
It has very wide input voltage range from 8V to 48V,
The device is designed to operate in critical conduction
mode (CrM) control scheme (This operating mode
results in an average LED current which is equal to half
of the peak switching current) optimized to drive high
current LEDs. Thus highly efficient and accurate LED
current regulation can be achieved. In CrM, the
switching frequency will vary with line, load , inductance
and switching loss, the current of the inductor starts at
zero each switching cycle. So, external power MOSFET
can significantly be reduced the peak spike voltage. A
external sense resistor (RSN) sets the peak inductor
current, which is regulated at 300mV (Typically), under
this operating mode results in an average current which
is equal to half of the peak switching current.
Q1
CIN
ZCD
GATE
CS
CT
GND
VIN
RSN
L1
Cout
D1
C1
SM8200
The SM8200 offers the following protection functions:
LED open protection, LED short-circuit protection and IC
junction over-temperature shutdown with auto recovery
feature. The device is available in the low profile 6-lead
SOT-23 package and is ideal for space constrained
applications.
8VDC ~ 48VDC
Preliminary Datasheet


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