SGM6604
High-voltage boost LED driver supporting up to 40V output with analog and PWM dimming for multi-LED string applications
Product Overview
Description
The SGM6604 is a high-efficiency boost LED driver capable of driving up to 40V output for multiple series LEDs.
With wide input voltage range of 2.7V to 24V, it supports applications from single-cell batteries to automotive systems.
The device features analog and PWM dimming, open LED protection, and comprehensive fault detection.
Product Series
SGM
Primary Application
LED backlighting
Key Features
- Boost topology for high-voltage LED strings
- Wide 2.7V to 24V input voltage range
- Up to 40V output drives 10+ series LEDs
- 2A switch current capability
- Analog and PWM dimming support
- Open LED and short LED protection
- Adjustable switching frequency
- Thermal shutdown protection
Specifications
| Input Voltage | 2.7V to 24V |
|---|---|
| Output Voltage | Up to 40V |
| Switching Current | Up to 2A |
| Switching Frequency | 1MHz |
| Efficiency | Up to 93% |
| Dimming | Analog and PWM |
| Package | MSOP-8, TSSOP-14 |
Applications
LED backlighting
Electronic system design
General lighting
Electronic system design
Automotive lighting
Automotive and EV electronics
Street lighting
Electronic system design
Industrial lighting
Industrial automation and control
FAE Expert Insights
"The SGM6604 is an excellent boost LED driver for high-voltage LED string applications. The wide input voltage range makes it versatile for both battery-powered and mains-powered applications. I've successfully used this part in LED backlighting applications driving 12-series white LEDs from 12V input with excellent efficiency. The dual dimming modes (analog and PWM) provide flexibility for different control schemes. The open LED protection is crucial - it prevents output over-voltage if an LED fails open. One consideration: the compensation network needs to be designed based on your specific LED load characteristics. For large LED strings, use type II compensation for stability. The thermal performance is good with proper PCB layout - use thermal vias under the exposed pad to spread heat."
Versatile boost LED driver with wide input range and excellent dimming flexibility
— Jennifer Liu, BeiLuo
Frequently Asked Questions
How many LEDs can SGM6604 drive in series?
The SGM6604 can drive up to 40V output, which supports approximately 10-12 white LEDs in series (3V-3.5V each). The actual number depends on LED forward voltage and desired current. The actual number depends on LED forward voltage and desired current. Calculate total LED string voltage and ensure it is below 40V with adequate margin for reliable operation.
Calculate LED string voltage (Vf × number of LEDs) and ensure it is below 40V with margin.
What is the difference between analog and PWM dimming on SGM6604?
Analog dimming varies LED current amplitude directly, providing smooth dimming but limited range (typically 10:1). PWM dimming switches LED current on/off at high frequency, providing wider dimming range (100:1) and better color consistency.
Use PWM dimming for wide range and color stability. Use analog dimming for simpler control.
What protection features does SGM6604 include?
SGM6604 includes open LED protection (prevents over-voltage), short LED protection, over-current protection, and thermal shutdown. These features ensure safe operation under fault conditions. These features ensure safe operation under fault conditions including LED failures, short circuits, and abnormal operating conditions.
SGM6604 includes comprehensive protections for reliable operation in lighting applications.
Can SGM6604 be used for automotive lighting?
Yes, the SGM6604's 2.7V to 24V input range covers automotive battery voltage (9V-16V typical, 24V load dump). The device can drive LED strings for interior lighting, DRL, and other automotive applications.
SGM6604 is suitable for automotive lighting with proper input protection for load dump conditions.
What external components are needed for SGM6604?
SGM6604 requires an inductor (10-47μH), input capacitor (10μF ceramic), output capacitor (10-22μF ceramic), current sense resistor, and feedback divider resistors. The compensation network may need adjustment based on LED load.
Contact LiTong for reference designs and component selection guidance.