SGM3732 Datasheet, PDF (1/13 Pages) SG Micro Corp – PWM Dimming, 38V Step-Up LED Driver

SGM3732
PWM Dimming, 38V Step-Up LED Driver
GENERAL DESCRIPTION
The SGM3732 is a versatile constant current LED
driver with a high efficiency step-up converter
architecture. The low-side power MOSFET is
integrated in the device, significantly shrinking the
overall PCB layout area and minimizing the total
number of external components. Unique technology
and high 1.35A current limit allow SGM3732 to drive up
to 38V output (10 LEDs in series). Alternatively,
SGM3732 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. Digital PWM dimming interface is integrated to
adjust LED current. The PWM frequency is in the range
from 2kHz to 60kHz.
Various protection features are built into the SGM3732,
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 SGM3732 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
● 2kHz to 60kHz PWM Dimming Frequency
● 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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