Overview
The FSL146MRBN is an integrated Pulse Width Modulation (PWM) controller and SenseFET designed for offline Switch-Mode Power Supplies (SMPS) with minimal external components. It is produced by ON Semiconductor and is part of their Green-Mode Fairchild Power Switch (FPS™) series. This device includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), Leading-Edge Blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise current sources for loop compensation, and self-protection circuitry. The FSL146MRBN is well-suited for cost-effective design of flyback converters, reducing total cost, component count, size, and weight while increasing efficiency, productivity, and system reliability.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer | ON Semiconductor | Current Limit | 1.5 A |
| On Resistance - Max | 2.6 Ohms | Operating Supply Voltage | 7.5 V to 26 V |
| Supply Voltage - Min | 7.5 V | Supply Voltage - Max | 26 V |
| Pd - Power Dissipation | 1.5 W | Minimum Operating Temperature | -40°C |
| Maximum Operating Temperature | +125°C | Mounting Style | Through Hole |
| On Time - Max | 13 ns | Off Time - Max | 30 ns |
| Series | FSL146MRBN | Packaging | Tube |
| Product | Power Switches | Brand | ON Semiconductor / Fairchild |
| Factory Pack Quantity | 3000 | Unit Weight | 0.028769 oz |
| Output Power | 35 W | Input / Supply Voltage - Min | 13 V |
| Input / Supply Voltage - Max | 23 V | Switching Frequency | 73 kHz |
| Duty Cycle - Max | 73% | Operating Supply Current | 1.5 mA |
| Isolation | Non-Isolated | Number of Outputs | 1 Output |
Key Features
- Advanced Soft Burst-Mode Operation for Low Standby Power and Low Audible Noise
- Random Frequency Fluctuation (RFF) for Low EMI
- Pulse-by-Pulse Current Limit
- Various Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis, Output-Short Protection (OSP), and Under-Voltage Lockout (UVLO) with Hysteresis
- Low Operating Current (0.4mA) in Burst Mode
- Internal Startup Circuit
- Internal High-Voltage SenseFET: 650V
- Built-in Soft-Start: 15ms
- Auto-Restart Mode
Applications
The FSL146MRBN is suitable for various applications, including power supplies for LCD monitors, set-top boxes (STB), and DVD players. It is also general usage and can be applied to many different types of offline Switch-Mode Power Supplies (SMPS).
Q & A
- What is the FSL146MRBN?
The FSL146MRBN is an integrated Pulse Width Modulation (PWM) controller and SenseFET designed for offline Switch-Mode Power Supplies (SMPS) with minimal external components.
- Who is the manufacturer of the FSL146MRBN?
The FSL146MRBN is manufactured by ON Semiconductor.
- What are the key features of the FSL146MRBN?
The key features include Advanced Soft Burst-Mode Operation, Random Frequency Fluctuation for low EMI, Pulse-by-Pulse Current Limit, various protection functions, low operating current in Burst Mode, internal startup circuit, internal high-voltage SenseFET, built-in soft-start, and auto-restart mode.
- What is the maximum operating temperature of the FSL146MRBN?
The maximum operating temperature is +125°C.
- What is the switching frequency of the FSL146MRBN?
The switching frequency is 73 kHz.
- Does the FSL146MRBN have built-in protection functions?
Yes, it includes Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis, Output-Short Protection (OSP), and Under-Voltage Lockout (UVLO) with Hysteresis.
- What is the typical soft-start time of the FSL146MRBN?
The typical soft-start time is 15ms.
- Is the FSL146MRBN suitable for new designs?
No, the FSL146MRBN is discontinued and not recommended for new designs. Please contact an ON Semiconductor representative for information on alternative products.
- What is the maximum output power of the FSL146MRBN?
The maximum output power is 35 W.
- What is the package type of the FSL146MRBN?
The package type is DIP-8 (Through Hole).
