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OB3340 Datasheet

High CC Buck Topology LED driver

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OB3340 pdf
OB3340
High PF, High CC Buck Topology LED driver
Product Specification
GENERAL DESCRIPTION
The OB3340 is a high power factor and high
constant current precision LED driver for LED
lighting applications. An analog multiplier for
power factor correction (PFC), zero current
detector (ZCD) to ensure TM operation and
a feedback circuit to achieve constant LED current,
a current sensing comparator with built-in leading-
edge blanking ensures safe operation during
short-circuit at the output, and a totem pole output
ideally suited for driving a power MOSFET.
OB3340 provides comprehensive protection
features including system VCC under voltage
lockout (UVLO), Output short\open protection,
Cycle by cycle current limiting, and gate drive
output clamping for external power MOSFET
protection.
FEATURES
High Precision Constant Output Current
Analog multiplier for High Power Factor
Correction
Low Start-up Current and Operating Current
Internal Startup Timer for Stand-alone
Applications
Transition Mode (TM) Operation
Internal Leading Edge Blanking
Cycle-by-Cycle Current Limiting
Totem Pole Output with High State Clamping
Under Voltage Lockout with Hysteresis
VCC over voltage protection
Output short/open protection
Audio Noise Free
11V to 32V wide range of VCC voltage
APPLICATIONS
LED Lighting Power
TYPICAL APPLICATION
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_334000
On-Bright
On-Bright



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