LED Backlight Drivers PWM Dimming, 38V Boost LED Driver Integrated Circuit IC Chip
The SGM3732 is a high efficiency constant current LEDdriver with a 1.1MHz PWM boost converter. An internallow-side N-channel MOSFET and a high switchingfrequency make the SGM3732 easy to use smallcomponents and optimized for compact solutions.
The SGM3732 is capable of driving either up to 10LEDs in series for 38V output or total 260mA currentwith 3 LEDs in series per string while achieving highconversion efficiency. The LED current can beprogrammed by digital PWM dimming interface. ThePWM frequency is in the range from 2kHz to 60kHz.
The SGM3732 provides very low shutdown current. Italso includes a comprehensive set of protectionfeatures such as over-voltage protection, cycle-bycycle input current limit and thermal shutdown.The SGM3732 is available in a Green TSOT-23-6package. It operates over an ambient temperaturerange of -40℃ to +85℃
Key Features
● Input Voltage Range: 2.7V to 5.5V
● Support up to 10 LEDs in Series
● Integrated 40V/1.35A Switch
● High Efficiency PWM Boost Converter
● Switching Frequency: 1.1MHz
● Low Feedback Voltage: 200mV
● PWM Dimming Frequency: 2kHz to 60kHz
● 38V LED Open Protection
● 500kΩ Pull-Down Resistor on CTRL Pin
● Automatic Soft-Start for Reducing Inrush Current
● Less than 1µA Shutdown Current
● -40℃ to +85℃ Operating Temperature Range
● Available in a Green TSOT-23-6 Package
Applications
LED Backlighting
Mobile Phones and Digital Photo Frames
Portable Devices
Automotive Navigation
Typical Application
Pin Configurations
Pin Description
Product Selection Guid
| | Part Number | | | | | | | | | | Features |
| 1 | SGM3732 | 2.7 | 5.5 | 10 | <1 | 1.1 | Common Anode | 0.2 | PWM | TSOT-23-6 | 10 LEDs per String |
| 2 | SGM3738 | 3 | 18 | 10 | <1 | 0.6 | Common Anode | 0.24 | PWM & One-Wire | TQFN-3×3-16L | 2 Feedback Channels, 18V Input, Serial LED Driver |
| 3 | SGM3740 | 3 | 18 | 10 | <1 | 0.6 | Common Anode | 0.24 | PWM & One-Wire | TQFN-3×3-16L | 3 Feedback Channels, 18V Input, Serial LED Driver |
| 4 | SGM3740B | 3 | 18 | 10 | <1 | 0.6 | Common Anode | 0.24 | PWM & One-Wire | TQFN-3×3-16L | 4 Feedback Channels, 18V Input, Serial LED Driver |
| 3 | SGM3741 | 3 | 18 | 10 | <1 | 0.6 | Common Anode | 0.24 | PWM & PWM | TQFN-3×3-16L | 3 Feedback Channels, 18V Input, Serial LED Driver |
| 2 | SGM3743 | 3 | 18 | 10 | <1 | 1.2 | Common Anode | 1.2 | PWM & One-Wire | WLCSP-1.32×1.32-9B | 2 Feedback Channels, 18V Input, Serial LED Driver |
| 1 | SGM3747 | 2.7 | 5.5 | 10 | <1 | 1.1 | Common Anode | 0.2 | PWM | TSOT-23-6 | 1:500 High Performance, 10 LEDs per String |
| 1 | SGM3748 | 2.7 | 5.5 | 10 | <1 | 1.1 | Common Anode | 0.2 | PWM | TDFN-2×2-8L | 1:500 High Performance, 10 LEDs per String |
| 1 | SGM3749 | 3 | 20 | 10 | <1 | 1.25 | Common Anode | 0.4 | PWM | TDFN-2×2-6L,TSOT-23-6 | 1:500 High Performance, 10 LEDs per String, 20V Input |
| 1 | SGM3750 | 2.7 | 20 | 10 | <1 | 0.65 | Common Anode | 0.4 | PWM | TDFN-2×2-6L,TSOT-23-6 | 1:500 High Performance, 10 LEDs per String, 20V Input |
| 1 | SGM3752 | 2.7 | 5.5 | 10 | <1 | 1.2 | Common Anode | 0.2 | PWM | TSOT-23-6 | 1:250 High Performance, 10 LEDs per String |
| 1 | SGM3756 | 2.7 | 5.5 | 10 | <1 | 1.2 | Common Anode | 0.2 | PWM | TDFN-2×2-6L | 1:250 High Performance, 10 LEDs per String |
| 1 | SGM3757 | 2.7 | 5.5 | 10 | <1 | 1.2 | Common Anode | 0.2 | PWM | | 1:250 High Performance, 10 LEDs per String |
| 1 | SGM3758 | 2.7 | 5.5 | 7 | <1 | 1.2 | Common Anode | 0.2 | PWM | TDFN-2×2-6L | 1:500 High Performance, Screen Flash Mode Support |
| 1 | SGM3759 | 2.7 | 5.5 | 7 | <1 | 1.2 | Common Anode | 0.2 | PWM | TSOT-23-6 | 1:500 High Performance, Screen Flash Mode Support |
| 3 | SGM37603A | 3 | 24 | 8 | <1.5 | 1.2 | Common Anode | 0.66 | PWM & I 2C | WLCSP-1.78×1.36-12B,TDFN-3×3-12L | 12-Bit, 3 Feedback Channels, 24V Input, Serial LED Driver |
| 3 | SGM37603S | 3 | 5.5 | 9 | | 1.2 | Common Anode | 1.35 | PWM & I 2C | WLCSP-1.35×1.7-12B | 12-Bit, 3 Feedback Channels LED Driver |
| 4 | SGM37604A | 3 | 24 | 8 | <1.5 | 1.2 | Common Anode | 0.66 | PWM & I 2C | WLCSP-1.78×1.36-12B,TDFN-3×3-12L | 12-Bit, 4 Feedback Channels, 24V Input, Serial LED Driver |
| 4 | SGM37604S | 3 | 5.5 | 9 | | 1.2 | Common Anode | 1.35 | PWM & I 2C | WLCSP-1.35×1.7-12B | 12-Bit, 4 Feedback Channels LED Driver |
| 1 | SGM3766 | 2.7 | 5.5 | 10 | <1 | 1.2 | Common Anode | 0.2 | PWM | TSOT-23-5 | 1:500 High Performance, 10 LEDs per String |
Integrated circuits (ICs) serve as the foundation of modern electronics, offering small size, low power consumption, strong performance and high reliability. They are widely used in consumer electronics, industrial applications, communications, automotive electronics, medical equipment, and aerospace/defense systems.
Uchi Electronics provides high-performance analog and mixed-signal processing solutions for industrial automation, new energy, automotive, communications, computing, consumer electronics and medical equipment applications.
This solution demonstrates the application of integrated circuits in portable POS machines. For assistance selecting the right product, please contact our technical support team.
