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LC5222S Datenblatt(PDF) 1 Page - Sanken electric

Teilenummer LC5222S
Bauteilbeschribung  Off-Line DC / DC LED Driver ICs
Download  11 Pages
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Hersteller  SANKEN [Sanken electric]
Direct Link  http://www.sanken-ele.co.jp/en
Logo SANKEN - Sanken electric

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LC5222D/25D and LC5222S/25S
Description
LC5220 series is a non-isolating, simple and efficient LED
driver. The high voltage capability allows direct connection
to a wide range of supply voltages ranging from 25 to 400 V
(recommended). The LC5220 uses constant current mode
to drive LEDs. and buck and buck-boost voltage converters
can be configured.
A power MOSFET and controller IC are incorporated in
one package. Because few external parts are required, the
LC5220 is ideal for use in small-size LED light bulbs.
Various control requirements can be supported through the
REF pin, including peak current control, output on/off, and
sleep mode enable.
Moreover, there is a protection circuit for freewheeling
diode open, protection for a buck-boost voltage converter
open LED load, and a variable overcurrent protection func-
tion. These features improve safety for both the LC5220 and
the LEDs.
Features and Benefits
• Buck and buck-boost topology; selectable by peripheral
circuit structure
• Built-in fixed reference voltage limiting constant current
control; high precision regulator improves current
precision and simplifies setting of current level
• Sleep function, with latch mode; input high, 3 V or more,
on REF pin turns off IC output to LEDs
• Enable function; input low on REF pin toggles IC output
to LEDs
• High input voltage; up to 250 V or 450 V, depending on
product
• Output Current: 0.5A
• Built-in constant current control; PWM method, output
current adjustable by the voltage input on the REF pin
• External adjustable PWM dimming control
• Protection features:
▫ Open protection (OPP) with latched shutdown; protects
IC when a free-wheeling diode is open
▫ Undervoltage lockout (UVLO)
▫ Overcurrent protection (OCP) with latched shutdown;
variable OCP threshold linked to REF pin voltage
▫ Thermal shutdown (TSD) with auto restart
Off-Line DC/DC LED Driver ICs
Typical Application
Applications
• LED lighting fixtures
• LED light bulbs
Packages
Not to scale
DIP8
SOP8
LC5220
VBB
OUT
SEN
GND
REG
PWM
REF
R1
R2
CPWM
RS
D1
L1
C2
C1
CIN
AC
Input
VIN
C3
Line
Filter
VLED
An example of a buck voltage converter application circuit
LC5222D/25D_22S/25S-DS
SANKEN ELECTRIC CO., LTD.
August 8, 2012


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