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Utsource certified used parts
Utsource certified used parts provide the following guarantees:
1. Utsource will inspect the goods, including appearance inspection (no serious damage to the appearance), select qualified and honest suppliers, and ensure 98% qualification rate.
2. Some parts are tested by machine.
3. Utsource certified parts can be returned and refunded unconditionally within 60 days.
Description
Power Factor Correction (PFC), STMicroelectronics Power Factor Correction (PFC) controllers operate in Transition Mode (TM) and Continuous Current Mode (CCM) for a wide-range-mains operation. The PFC controllers embed advanced protection features, which make SMPS more robust and compact, requiring fewer external components.
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The parameters and performance indicators of this product are sourced from the internet. In case of discrepancies, please refer to the manufacturer's technical specifications!！
| Parameter | Symbol | Min | Typical | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | Vcc | 2.7 | - | 55 | V |
| Quiescent Current | IQ | - | 200 | - | μA |
| Output Current Limit | IOLIM | - | 1.2 | - | A |
| Shutdown Input Voltage | VSHDN | - | 1.24 | - | V |
| Oscillator Frequency | fOSC | 50 | 400 | 1000 | kHz |
| Duty Cycle Range | DCR | 0 | - | 100 | % |
| Overcurrent Protection | OCP | - | 1.3 | - | A |
| Thermal Shutdown | TSD | - | 160 | - | °C |
| Operating Temperature | TOPR | -40 | - | 125 | °C |
| Storage Temperature | TSTG | -55 | - | 150 | °C |
Supply Voltage (Vcc):
Quiescent Current (IQ):
Output Current Limit (IOLIM):
Shutdown Input Voltage (VSHDN):
Oscillator Frequency (fOSC):
Duty Cycle Range (DCR):
Overcurrent Protection (OCP):
Thermal Shutdown (TSD):
Operating Temperature (TOPR):
Storage Temperature (TSTG):
DESCRIPTION
The L4981 I.C. provides the necessary features to achieve a very high power factor up to 0.99.
Realized in BCD 60II technology this power factor corrector (PFC) pre-regulator contains all the control functions for designing a high efficiency-mode power supply with sinusoidal line current consumption.
The L4981 can be easily used in systems with mains voltages between 85V to 265V without any line switch. This new PFC offers the possibility to work at fixed frequency (L4981A) or modulated frequency (L4981B) optimizing the size of the in put filter; both the operating frequency modes working with an average current mode PWM controller, maintaining sinusoidal line current without slope compensation.
● CONTROL BOOST PWM UP TO 0.99P.F.
● LIMIT LINE CURRENT DISTORTION TO < 5%
● UNIVERSAL INPUT MAINS
● FEED FORWARD LINE AND LOAD REGULATION
● AVERAGE CURRENT MODE PWM FOR MINIMUM NOISE SENSITIVITY
● HIGH CURRENT BIPOLAR AND DMOS TOTEM POLE OUTPUT
● LOW START-UP CURRENT (0.3mA TYP.)
● UNDER VOLTAGE LOCKOUT WITH HYSTERESIS AND PROGRAMMABLE TURN ON THRESHOLD
● OVERVOLTAGE, OVERCURRENT PROTECTION
● PRECISE 2% ON CHIP REFERENCE EXTERNALLY AVAILABLE
● SOFT START
| QUANTITY | UNIT PRICE | PLUS UNIT PRICE | TOTAL PRICE |
|---|---|---|---|
| ≥1: | US $6.25950 | US $5.88393 | US $5.88393 |
Substitute (equivalent) Product
| Substitute Product | Brief Description |
|---|---|
| UC3854BN | High-performance power factor correction (PFC) controller |
| MC34262 | PFC controller IC with high current capability |
| NCP1653A | PFC controller optimized for higher power applications |
| ICE2PCS01G | High-performance PFC controller with integrated protection features |
| L6562D | Highly integrated PFC controller designed to drive MOSFETs or IGBTs |
Product Usage
The L4981BD is a specialized integrated circuit designed for high-performance, continuous-mode power factor correction (PFC) applications. Here are some of the typical circuits that use the L4981BD:
Power Factor Correction Boost Converters:
AC-DC Power Supplies:
UPS Systems (Uninterruptible Power Supplies):
Battery Chargers:
LED Drivers:
Renewable Energy Systems:
When designing circuits with the L4981BD, engineers typically focus on the following aspects:
Overall, the L4981BD is a critical component in many modern power electronics systems that require high efficiency and regulatory compliance in terms of power quality.
Global Logistics Country List
| Flag | Country | Estimated Delivery Time | Minimum First Weight Cost | ||
|---|---|---|---|---|---|
| Express | Standard Shipping | Express (0.5kg) | Standard Shipping (0.05kg) | ||
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Returns are normally accepted when completed within 90 days from the date of the parcel delivered.
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Warranty
All UTSOURCE purchases have a 90 days money back return policy, plus a 100 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
L4981BD
L4981BD has several brands around the world that may have alternate names for L4981BD due to regional differences or acquisition. L4981BD may also be known as the following names:
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