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744066330 データシート(PDF) 1 Page - Union Semiconductor, Inc.

部品番号 744066330
部品情報  Hysteretic Buck High Brightness LED Driver with Internal Switch
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メーカー  UNIONSEMI [Union Semiconductor, Inc.]
ホームページ  http://www.union-ic.com
Logo UNIONSEMI - Union Semiconductor, Inc.

744066330 データシート(HTML) 1 Page - Union Semiconductor, Inc.

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http://www.union-ic.com Rev.05 Apr.2016
1/13
UM1360
Hysteretic Buck High Brightness LED Driver with Internal Switch
UM1360Y SOT89-5
General Description
The UM1360 is a PWM step-down converter with internal power switch, designed for driving
single or multiple series connected LEDs efficiently from a voltage source higher than the LED
voltage. The UM1360 can drive up to 10 series connected LEDs. The device operates from an
input supply between 6V and 40V and employs hysteretic control with a high side current sense
resistor to set the constant output current up to 1A. The device is well suited for applications
requiring a wide input range. The high side current sensing and an integrated current sensing
circuitry minimize the number of external components while delivering an accurate average
output current. Depending upon supply voltage and external components, this device can provide
up to 30 watts of output power.
Output current can be adjusted below the set value, by applying an external control signal to the
VSET pin. The VSET pin will accept either a DC voltage or a PWM waveform. Dedicated pulse
width modulation (PWM) input enables pulsed LED dimming over a wide range of brightness
levels. A hysteretic control method ensures excellent input supply rejection and fast response
during load transients and PWM dimming.
Applying a voltage of 0.2V or lower to the VSET pin turns the output off and switches the device
into a low current standby state. The UM1360 employs spread spectrum technique to greatly
reduce its interference to other part of the system.
The UM1360 comes in small SOT89-5 package. It is ideal for industrial and general lighting
applications.
Applications
Features
Low Voltage Halogen Replacement
LEDs
Low Voltage Industrial Lighting
LED Back-Side Lighting
Illuminated Signs
DC/DC or AC/DC LED Driver
Application
General Purpose, Constant Current
Source
Hysteretic Control with High Side Current
Sensing
Integrated 40V 0.5Ω NDMOS
Up to 98% Efficiency
Wide Input Voltage Range: 6V to 40V
50V Transient Capability
± 5% LED Current Accuracy
Adjustable Constant LED Current
Single Pin On/Off and Brightness Control
Using DC Voltage or PWM
Spread Spectrum Driver
Over Temperature, Open Circuit LED
Protection
Up to 1MHz Switching Frequency
Pb-Free SOT89-5 Package


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