Overview
The FSL336LRLX, produced by onsemi, is an integrated Pulse Width Modulator (PWM) and SENSEFET® designed for high-performance offline buck, buck-boost, and non-isolation flyback Switched Mode Power Supplies (SMPS). This device is optimized for minimal external components and features a built-in high-voltage power regulator, eliminating the need for an auxiliary bias winding. It includes an internal transconductance amplifier to reduce external components for the feedback compensation circuit.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Drain Pin Voltage (VDS) | -0.3 | - | 650.0 | V |
| Supply Voltage (VCC) | -0.3 | - | 26.0 | V |
| Feedback Voltage (VFB) | -0.3 | - | 12.0 | V |
| Current Limit Pin Voltage (ILIMIT) | -0.3 | - | 12.0 | V |
| Drain Current Pulsed (IDM) | - | - | 12 | A |
| Switching Frequency (fOSC) | 45 | 50 | 55 | kHz |
| No-Load Power Consumption (at 230 VAC) | - | - | <25 mW (with external bias), <120 mW (without external bias) | mW |
| Operating Junction Temperature (TJ) | -40 | - | 125 | °C |
Key Features
- Built-in Avalanche-Rugged SENSEFET: 650 V
- Fixed Operating Frequency: 50 kHz
- No Need for Auxiliary Bias Winding
- Frequency Modulation for Attenuating EMI
- Pulse-by-Pulse Current Limiting
- Ultra-Low Operating Current: 250 µA
- Built-in Soft-Start and Startup Circuit
- Adjustable Peak Current Limit
- Built-in Transconductance (Error) Amplifier
- Various Protections: Overload Protection (OLP), Over-Voltage Protection (OVP), Feedback Open Loop Protection (FB_OLP), Thermal Shutdown (TSD)
- Fixed 650 ms Restart Time for Safe Auto-Restart of All Protections
- Pb-Free, Halide Free, and RoHS Compliant
Applications
- Switched Mode Power Supplies (SMPS) for Home Appliances and Industrial Applications
- SMPS for Auxiliary Power
Q & A
- What is the primary function of the FSL336LRLX?
The FSL336LRLX is an integrated PWM and SENSEFET designed for high-performance offline buck, buck-boost, and non-isolation flyback SMPS.
- What is the maximum drain pin voltage for the FSL336LRLX?
The maximum drain pin voltage (VDS) is 650 V.
- Does the FSL336LRLX require an auxiliary bias winding?
No, the FSL336LRLX does not require an auxiliary bias winding due to its built-in high-voltage power regulator.
- What is the typical switching frequency of the FSL336LRLX?
The typical switching frequency is 50 kHz.
- How does the FSL336LRLX reduce EMI?
The device uses frequency modulation to attenuate EMI by spreading the energy over a wider frequency range.
- What are the key protection features of the FSL336LRLX?
The device includes Overload Protection (OLP), Over-Voltage Protection (OVP), Feedback Open Loop Protection (FB_OLP), and Thermal Shutdown (TSD).
- What is the no-load power consumption of the FSL336LRLX at 230 VAC?
The no-load power consumption is less than 25 mW with external bias and less than 120 mW without external bias.
- How does the FSL336LRLX manage power dissipation in Standby Mode?
The device enters Burst Mode to minimize power dissipation in Standby Mode, reducing switching loss.
- Is the FSL336LRLX compliant with environmental standards?
Yes, the FSL336LRLX is Pb-Free, Halide Free, and RoHS Compliant.
- What are the typical applications of the FSL336LRLX?
The device is used in SMPS for home appliances, industrial applications, and auxiliary power supplies.
