SGM3725 Datasheet, PDF (1/13 Pages) SG Micro Corp – 38V Step-Up LED Driver

SGM3725
38V Step-Up LED Driver
GENERAL DESCRIPTION
The SGM3725 is a versatile constant current LED
driver with a high efficiency step-up converter
architecture. Unique technology and high 1.35A current
limit allow SGM3725 to drive up to 38V output (10
LEDs in series). Alternatively, SGM3725 can deliver
260mA total current with 3 series LEDs per string. It
can also maximize the current capability while
achieving high conversion efficiency. The optimized
1MHz switching frequency results in reduced
conduction loss and small external component size. A
single wire interface is integrated to adjust the FB
voltage in 32 steps, which can overcome audible noise
and inrush current issues in normal PWM dimming
schemes.
Various protection features are built into the SGM3725,
including cycle-by-cycle input current limit protection,
open LED (output over-voltage) protection and thermal
shutdown protection. The leakage current in shutdown
mode is less than 1µA.
The SGM3725 is available in Green TSOT-23-6
package. It operates over an ambient temperature
range of -40℃ to +85℃.
FEATURES
● Wide Output Range: Up to 10 Series LEDs
● Integrated 40V High Current Switch (1.35A Limit)
● 2.7V to 5.5V Input Voltage Range
● High Efficiency PWM Converter
● Low 200mV Feedback Voltage
● 500kΩ Pull-Low Resistor on CTRL Pin
● Single Wire Dimming Interface
● 38V Open LED Protection
● 1MHz Switching Frequency
● Integrated Soft-Start Function
● Less than 1µA Shutdown Current
● Simple, Small Solution Size
● Available in Green TSOT-23-6 Package
● -40℃ to +85℃ Temperature Range
APPLICATIONS
LED Backlighting
Mobile Phones
Handheld Devices
Digital Photo Frames
Automotive Navigation
SG Micro Corp
www.sg-micro.com
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