FAN6921MRMY
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onsemi FAN6921MRMY

Manufacturer No:
FAN6921MRMY
Manufacturer:
onsemi
Package:
Tape & Reel (TR)
Description:
IC PFC CTRLR CRM 16SOP
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The FAN6921MRMY, produced by onsemi, is a highly integrated electronic component that combines a Power Factor Correction (PFC) controller and a Quasi-Resonant PWM controller. This integration allows for a cost-effective design with fewer external components. The controller is designed to provide regulated DC output voltage and natural power factor correction using a controlled on-time technique. It also features an innovative THD optimizer to reduce input current distortion, enhancing THD performance. The FAN6921MRMY is available in a 16-pin small outline package (SOP) and operates over a wide temperature range from -40°C to 105°C.

Key Specifications

Parameter Min Typ Max Unit
Operating Temperature Range -40 105 °C
Switching Frequency 440 Hz
VDD Turn-On Threshold Voltage 16.5 18.0 19.5 V
VDD PWM Off Threshold Voltage 9 V
PFC Maximum On Time 22 25 28 μs
PFC Gate Output Clamping Voltage 14.0 15.5 17.0 V
Internal Over-Temperature Shutdown 140 °C

Key Features

  • Integrated PFC and Flyback Controller
  • Critical Mode PFC Controller with Zero-Current Detection
  • Quasi-Resonant Operation for PWM Stage
  • Internal Minimum tOFF 8 μs for QR PWM Stage
  • Internal 10 ms Soft-Start for PWM
  • Brownout Protection
  • High/Low Line Over-Power Compensation
  • Auto-Recovery Over-Current Protection
  • Auto-Recovery Open-Loop Protection
  • Externally Latch Triggering (RT Pin)
  • Adjustable Over-Temperature Latched (RT Pin)
  • VDD Pin and Output Voltage OVP (Latched)

Applications

  • AC/DC Notebook Adapters
  • Open-Frame Switch Mode Power Supplies (SMPS)
  • Battery Chargers

Q & A

  1. What is the operating temperature range of the FAN6921MRMY?

    The operating temperature range is from -40°C to 105°C.

  2. What is the switching frequency of the FAN6921MRMY?

    The switching frequency is approximately 440 Hz.

  3. What type of package does the FAN6921MRMY come in?

    The FAN6921MRMY is available in a 16-pin small outline package (SOP).

  4. What protection features does the FAN6921MRMY offer?

    The controller includes secondary-side open-loop and over-current protection with auto recovery, adjustable over-temperature protection, internal over-temperature shutdown, VDD pin OVP, and DET pin over-voltage protection.

  5. How does the THD optimizer in the FAN6921MRMY work?

    The THD optimizer reduces input current distortion at zero-crossing duration to improve THD performance.

  6. What is the purpose of the RANGE pin in the FAN6921MRMY?

    The RANGE pin’s impedance changes according to the VIN pin voltage level, helping in brown-in/out protections and adjusting the controller's operation based on input voltage levels.

  7. How does the zero-current detection (ZCD) function work in the FAN6921MRMY?

    The ZCD pin detects the zero-current condition of the PFC inductor by sensing the voltage signal from an auxiliary winding, which triggers a new PFC switching cycle.

  8. What are some common applications of the FAN6921MRMY?

    Common applications include AC/DC notebook adapters, open-frame SMPS, and battery chargers.

  9. What is the internal over-temperature shutdown threshold of the FAN6921MRMY?

    The internal over-temperature shutdown threshold is 140°C.

  10. Does the FAN6921MRMY support soft-start functionality?

    Yes, it includes an internal 10 ms soft-start for PWM.

Product Attributes

Mode:Critical Conduction (CRM)
Frequency - Switching:- 
Current - Startup:20 µA
Voltage - Supply:8.5V ~ 25V
Operating Temperature:-40°C ~ 105°C
Mounting Type:Surface Mount
Package / Case:16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:16-SOIC
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Similar Products

Part Number FAN6921MRMY FAN6920MRMY FAN6921AMRMY FAN6921BMRMY FAN6921MLMY
Manufacturer onsemi onsemi onsemi onsemi Fairchild Semiconductor
Product Status Obsolete Not For New Designs Obsolete Active Active
Mode Critical Conduction (CRM) Critical Conduction (CRM) Critical Conduction (CRM) Critical Conduction (CRM) Critical Conduction (CRM)
Frequency - Switching - - - - -
Current - Startup 20 µA 20 µA 20 µA 20 µA 10 µA
Voltage - Supply 8.5V ~ 25V 12V ~ 25V 8.5V ~ 25V 8.5V ~ 25V 8.5V ~ 25V
Operating Temperature -40°C ~ 105°C -40°C ~ 105°C -40°C ~ 105°C -40°C ~ 105°C -40°C ~ 105°C
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.154", 3.90mm Width)
Supplier Device Package 16-SOIC 16-SOIC 16-SOIC 16-SOIC 16-SOP

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