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ST L4981B
Power Factor Correction - PFC Very High Power
Brands: Stmicroelectronics
Mfr.Part #: L4981B
Datasheet: L4981B Datasheet (PDF)
Package/Case: PDIP-20
Product Type: Power Management ICs
RoHS Status:
Stock Condition: 3747 pcs, New Original
Warranty: 1 Year Ovaga Warranty - Find Out More
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Add To BomL4981B General Description
PFC IC Average Current 100kHz 20-DIP
Features
- Operating frequency range: 50 kHz to 500 kHz
- High voltage startup: up to 600 V
- Adaptive output voltage control
- Soft start and soft stop functions
- Output overvoltage protection
- Internal leading-edge blanking
- Synchronization function
- Auto-restart function for short-circuit and overload protection
- Low standby current consumption
Application
- Offline flyback power supplies for TVs, monitors, and other consumer electronics
- Industrial power supplies for welding machines, motor drives, and other high-power applications
- Lighting ballasts for fluorescent lamps, high-intensity discharge lamps, and LED lighting
Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Product Category | Power Factor Correction - PFC | RoHS | Details |
| Switching Frequency | 115 kHz | Minimum Operating Temperature | - 40 C |
| Maximum Operating Temperature | + 125 C | Mounting Style | Through Hole |
| Package / Case | PDIP-20 | Brand | STMicroelectronics |
| Height | 2.68 mm | Length | 25.4 mm |
| Product Type | PFC - Power Factor Correction | Series | L4981 |
| Factory Pack Quantity | 20 | Subcategory | PMIC - Power Management ICs |
| Type | Power Factor Corrector | Width | 7.1 mm |
| Unit Weight | 0.079719 oz |
Shipping
| Shipping Type | Ship Fee | Lead Time | |
|---|---|---|---|
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DHL | $20.00-$40.00 (0.50 KG) | 2-5 days |
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Fedex | $20.00-$40.00 (0.50 KG) | 2-5 days |
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UPS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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TNT | $20.00-$40.00 (0.50 KG) | 2-5 days |
 |
EMS | $20.00-$40.00 (0.50 KG) | 2-5 days |
 |
REGISTERED AIR MAIL | $20.00-$40.00 (0.50 KG) | 2-5 days |
Processing Time：Shipping fee depend on different zone and country.
Payment
| Terms of payment | Hand Fee | |
|---|---|---|
 |
Wire Transfer | charge US$30.00 banking fee. |
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Paypal | charge 4.0% service fee. |
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Credit Card | charge 3.5% service fee. |
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Western Union | charge US.00 banking fee. |
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Money Gram | charge US$0.00 banking fee. |
Guarantees
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
Packing
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Step3 :Anti-static bag
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All the products will packing in anti-staticbag. Ship with ESD antistatic protection.
Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.
We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.
After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.
Equivalent Parts
For the L4981B component, you may consider these replacement and alternative parts:
Part Number
Brands
Package
Description
Part Number : NCP1606
Brands :
Package :
Description :
Part Number : UCC28083
Brands :
Package :
Description :
Part Number : TNY279PN
Brands :
Package :
Description :
Part Number : ICE3PCS01G
Brands :
Package : DSO-14
Description : Current Mode PWM Controllers STANDALONE PFC CTRLR IN CCM
Part Number : FAN7529MX
Brands :
Package :
Description :
Part Number : L6562D
Brands :
Package : SOP-8
Description : PFC Controller IC, 10.3 V to 22 V & 3.5 mA Supply, 10.3 V Lockout, 30 µA Start-Up, 70 kHz, SOIC-8
Part points
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The L4981B is an integrated voltage regulator designed for use in high-power, high-efficiency switch-mode power supplies. It features a wide input voltage range, adjustable output voltage, and overcurrent and thermal protection. It is commonly used in applications such as industrial power supplies, battery chargers, and lighting systems.
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Equivalent
L4981B chip is equivalent to IR2153, SG3524, and UC3845 chips. These chips are also voltage mode PWM controller ICs commonly used in power supply applications to control the switching of power MOSFETs. -
Features
1. High voltage switching regulator 2. Input voltage range of 8 to 60V 3. Maximum output current of 2A 4. Internal 700V power MOSFET 5. Built-in frequency jittering for reduced EMI 6. Overcurrent and overvoltage protection 7. Adjustable output voltage and soft-start function 8. Suitable for industrial and consumer applications -
Pinout
The L4981B is a high-voltage full-bridge PWM controller with integrated high-voltage start-up circuit. It has 20 pins and provides functions such as overvoltage protection, overcurrent protection, and thermal shutdown. It is commonly used in switching power supply applications to regulate voltage and current outputs. -
Manufacturer
The L4981B is manufactured by STMicroelectronics. STMicroelectronics is a multinational semiconductor manufacturer known for producing a wide range of components for various industries including automotive, industrial, and consumer electronics. They are a leading company in the field of microelectronics and are headquartered in Switzerland. -
Application Field
The L4981B is a primary controller for offline flyback converters used in various applications such as LED lighting, auxiliary power supplies, and small appliance power supplies. It is also suitable for use in telecommunication equipment, industrial control systems, and consumer electronics. -
Package
The L4981B chip is available in a PowerSO20 package type, in the form of an integrated circuit. It measures 10mm x 8mm x 2.5mm in size, making it suitable for various power management applications.
Datasheet PDF
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