Overview
The FAN5333BSX, produced by onsemi, is a high-efficiency, high-current serial LED driver designed for use in various portable and handheld electronic devices. This device features fixed-frequency mode operation and an integrated FET switch, making it suitable for driving flash LEDs in serial connections. It is optimized for high switching frequencies to minimize switching noise, particularly in hand-held communications equipment. The FAN5333BSX is known for its minimal quiescent current in both normal and shutdown modes, which helps extend battery life. The device can be switched between normal and shutdown modes using a logic level shutdown circuitry.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.8 to 5.5 | V dc |
| Output Voltage | Up to 30 | V |
| Output Current | 65 mA | |
| Peak Switch Current | Up to 1.5 A | |
| Output Power Capability | 1.5 W | |
| Switching Frequency | 1.2 to 1.8 MHz | |
| Shutdown Current | < 1 µA | |
| Feedback Voltage (FAN5333B) | 315 mV | |
| Package Type | 5-Lead SOT-23 | |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- Fixed-frequency mode operation at 1.5 MHz to minimize switching noise
- Integrated FET switch with low ON-resistance for high efficiency and low power dissipation
- Adjustable output voltage and cycle-by-cycle current limit circuit to keep peak current below 1.5 A
- Low feedback voltage and over-voltage protection for enhanced reliability
- Thermal shutdown and internal compensation for stable operation
- PWM dimming control for flexible brightness adjustment
- Minimal quiescent current in both normal and shutdown modes to extend battery life
- Compact 5-lead SOT-23 package for easy integration into compact designs
Applications
The FAN5333BSX is commonly used in various portable electronic devices such as cell phones, PDAs, digital cameras, and portable gaming systems. It is also utilized in LED backlighting for LCD displays and other battery-powered systems that require efficient voltage conversion and power management.
Q & A
- What is the input voltage range of the FAN5333BSX?
The input voltage range of the FAN5333BSX is 1.8 to 5.5 V dc.
- What is the maximum output voltage of the FAN5333BSX?
The maximum output voltage of the FAN5333BSX is up to 30 V.
- What is the switching frequency of the FAN5333BSX?
The switching frequency of the FAN5333BSX is between 1.2 and 1.8 MHz.
- What is the peak switch current of the FAN5333BSX?
The peak switch current of the FAN5333BSX is up to 1.5 A.
- What package type is the FAN5333BSX available in?
The FAN5333BSX is available in a 5-lead SOT-23 package.
- What are the key features of the FAN5333BSX for power management?
The FAN5333BSX features fixed-frequency mode operation, integrated FET switch, adjustable output voltage, cycle-by-cycle current limit, low feedback voltage, over-voltage protection, and thermal shutdown.
- How does the FAN5333BSX minimize switching noise?
The FAN5333BSX minimizes switching noise by operating at high switching frequencies, typically around 1.5 MHz.
- What is the shutdown current of the FAN5333BSX?
The shutdown current of the FAN5333BSX is less than 1 µA.
- What are some common applications of the FAN5333BSX?
The FAN5333BSX is commonly used in cell phones, PDAs, digital cameras, portable gaming systems, and LED backlighting for LCD displays.
- Does the FAN5333BSX support PWM dimming?
Yes, the FAN5333BSX supports PWM dimming for flexible brightness adjustment).
