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PDF SM8200 Data sheet ( Hoja de datos )

Número de pieza SM8200
Descripción High Efficiency Step Down LED Driver
Fabricantes SamHop 
Logotipo SamHop Logotipo



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No Preview Available ! SM8200 Hoja de datos, Descripción, Manual

Preliminary Datasheet
High Efficiency Step Down LED Driver
SM8200
GENERAL DESCRIPTION
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.
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.
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
APPLICATIONS
MR16
High power LED drivers
Signage and decorative LED lighting
Automotive or Industrial
TYPICAL APPLICATION CIRCUIT
8VDC 48VDC
CIN
SM8200
VIN ZCD
CT GATE
C1
GND
CS
www.samhop.com.tw
1
D1 Cout
L1
Q1
RSN
Rev. 1.0 @ 2011/12

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