Overview
The FSL136MR, produced by onsemi, is an integrated Pulse Width Modulator (PWM) and SENSEFET specifically designed for high-performance offline Switch-Mode Power Supplies (SMPS). This device combines an avalanche-rugged SENSEFET with a current-mode PWM control block, making it ideal for applications requiring minimal external components. The FSL136MR integrates various protection features and control mechanisms, such as Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), a frequency generator for EMI attenuation, and Thermal Shutdown (TSD) protection. It offers good soft-start performance and reduces the total component count, design size, and weight compared to discrete MOSFET and controller solutions, while increasing efficiency, productivity, and system reliability.
Key Specifications
| Parameter | Unit | Typical | Min | Max |
|---|---|---|---|---|
| Operating Temperature Range | °C | - | -40 | 105 |
| Peak Current Limit | A | 2.15 | 1.89 | 2.41 |
| Operating Frequency | kHz | 67 | - | - |
| Minimum VSTR Supply Voltage | V | - | - | 35 |
| Junction-to-Ambient Thermal Resistance | °C/W | - | - | 80 |
| Standby Power Consumption at 265V AC, No-load Condition with Burst Mode | mW | - | - | <50 |
| Internal Soft-Start Time | ms | 15 | 10 | 20 |
Key Features
- Integrated high-voltage power switching regulators combining an avalanche-rugged SENSEFET with a current-mode PWM control block.
- Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), and Thermal Shutdown (TSD) protection.
- Frequency generator for EMI attenuation and optimized gate turn-on/turn-off driver.
- Temperature-compensated precision current sources for loop compensation and fault protection circuitry.
- Good soft-start performance and adjustable peak current limit.
- Pulse-by-pulse current limiting and various protections including Over-Voltage Protection (OVP), Overload Protection (OLP), Output-Short Protection (OSP), and Abnormal Over-Current Protection (AOCP).
- Auto-restart mode and low operating current of 1.8mA.
- Internal startup circuit and precision fixed operating frequency with frequency modulation for attenuating EMI.
Applications
- Switch-Mode Power Supplies (SMPS) for VCR, STB, DVD, and DVCD players.
- SMPS for home appliances.
- Motion control in home appliances and industrial motors.
- Smart grid and smart meter applications.
- LED TV power supplies).
Q & A
- What is the FSL136MR?
The FSL136MR is an integrated Pulse Width Modulator (PWM) and SENSEFET designed for high-performance offline Switch-Mode Power Supplies (SMPS).
- What are the key protection features of the FSL136MR?
The FSL136MR includes Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), Thermal Shutdown (TSD) protection, Over-Voltage Protection (OVP), Overload Protection (OLP), Output-Short Protection (OSP), and Abnormal Over-Current Protection (AOCP).
- What is the operating frequency of the FSL136MR?
The operating frequency of the FSL136MR is typically 67 kHz.
- What is the minimum VSTR supply voltage for the FSL136MR?
The minimum VSTR supply voltage for the FSL136MR is 35 V.
- What is the standby power consumption of the FSL136MR at 265V AC, no-load condition with burst mode?
The standby power consumption is under 50 mW at 265V AC, no-load condition with burst mode.
- What is the internal soft-start time of the FSL136MR?
The internal soft-start time of the FSL136MR is typically 15 ms.
- What are the typical applications of the FSL136MR?
The FSL136MR is typically used in SMPS for VCR, STB, DVD, and DVCD players, home appliances, motion control, smart grid, smart meters, and LED TV power supplies.
- How does the FSL136MR reduce component count and design size?
The FSL136MR reduces the total component count, design size, and weight by integrating high-voltage power switching regulators and control mechanisms, making it more efficient and reliable compared to discrete solutions.
- What is the junction-to-ambient thermal resistance of the FSL136MR?
The junction-to-ambient thermal resistance of the FSL136MR is 80 °C/W.
- Does the FSL136MR support auto-restart mode?
Yes, the FSL136MR supports auto-restart mode.
