onsemi FSL336LRLX
| Parameters | |
|---|---|
| Topology | Buck, Flyback |
| Voltage - Supply (Vcc/Vdd) | 7V ~ 26V |
| Control Features | - |
| Frequency - Switching | 50kHz |
| Internal Switch(s) | Yes |
| Voltage - Start Up | 8 V |
| Duty Cycle | - |
| Output Isolation | Non-Isolated |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | FSL336 |
| REACH Status | REACH Unaffected |
| Standard Package | 1,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
| Series | - |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 8-SMD (7 Leads), Gull Wing |
| Mfr | onsemi |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Voltage - Breakdown | 650V |
| Supplier Device Package | 7-LSOP |
| Power (Watts) | 20 W |
| Fault Protection | Current Limiting, Open Loop, Over Load, Over Temperature, Over Voltage |
FSL336LRLX Converter Offline Buck, Flyback Topology 50kHz 7-LSOP
The FSL336LRLX is a high-performance integrated Pulse Width Modulation (PWM) controller and SenseFET designed by ON Semiconductor (now part of onsemi) for offline switching-mode power supplies (SMPS). It targets non-isolated buck, buck-boost, and flyback topologies, offering minimal external component requirements. The chip integrates a high-voltage power regulator, eliminating the need for an auxiliary bias winding, and features a built-in transconductance amplifier to reduce external feedback compensation components. Its 50 kHz fixed operating frequency, 650 V avalanche-rugged SenseFET, and low standby power consumption (25 mW with external bias at 230 VAC) make it ideal for cost-sensitive, energy-efficient applications.
Key Applications
The FSL336LRLX is widely used in non-isolated power supplies for consumer electronics, industrial equipment, and automotive auxiliary systems. Typical applications include battery chargers, LED drivers, and low-power adapters where compact size, high efficiency, and robust protection are critical. Its ability to operate without auxiliary windings simplifies design, reduces BOM costs, and accelerates time-to-market for cost-sensitive projects.
Alternative PWM controller Models
● NCP1351: A current-mode PWM controller with integrated 700 V MOSFET, optimized for offline flyback converters up to 18 W.
● FAN7621S: A 650 V-rated quasi-resonant controller with built-in high-voltage startup, suitable for medium-power SMPS (up to 60 W).
● LNK304PN: A LinkSwitch-II family IC combining PWM controller, 700 V MOSFET, and feedback circuitry in a 6-pin DIP package for compact designs.
● TNY278PN: A TinySwitch-III family power converter IC with integrated 700 V MOSFET, offering ultra-low standby power (<30 mW) for adapters and chargers.
