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ST L4981A
Power Factor Correction - PFC Very High Power
Brands: Stmicroelectronics
Mfr.Part #: L4981A
Datasheet: L4981A Datasheet (PDF)
Package/Case: PDIP-20
Product Type: Power Management ICs
RoHS Status:
Stock Condition: 2851 pcs, New Original
Warranty: 1 Year Ovaga Warranty - Find Out More
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POWER FACTOR CORRECTOR, 4981, DIP20; UVLO: -; Supply Voltage Min: -; Supply Voltage Max: 19.5V; Startup Current: 300µA; Operating Supply Current: 12mA; Controller IC Case Style: DIP; No. of Pins: 20Pins; Duty Cycle (%): -; Frequency: 115kHz; Operating Temperature Min: -40°C; Operating Temperature Max: 125°C; Product Range: -; MSL: -; SVHC: No SVHC (17-Dec-2015); Base Number: 4981; IC Generic Number: 4981; Input Voltage Max: 5.3V; Logic Function Number: 4981; No. of Outputs: 1Outputs; Operating Temperature Range: -40°C to +125°C; Output Current Max: 300µA; Output Voltage: 7.5V; Output Voltage Max: 8.5V; Primary Input Voltage: 19.5V
Features
- Wide input voltage range: 85V to 265V AC
- Frequency jittering for low EMI
- Programmable deadtime for enhanced efficiency
- Zero current detector for quasi-resonant operation
- Overcurrent protection with latch or auto-restart
- Soft-start and shut-down
Application
- AC-DC power supplies
- Telecom and server power supplies
- Battery chargers
- LED lighting
- Industrial power supplies
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 |
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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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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 L4981A component, you may consider these replacement and alternative parts:
Part Number
Brands
Package
Description
Part Number : NCP1396AG
Brands : ON Semiconductor
Package :
Description :
Part Number : UCC28950
Brands : Texas Instruments
Package :
Description :
Part Number : ICE3AR4780JZ
Brands :
Package : DIP7
Description : Current Mode PWM Controllers Off-Line SMPS Curr Ctlr w/Integrt 800V
Part Number : FAN6863
Brands :
Package :
Description : by Fairchild Semiconductor
Part Number : CS3845B
Brands : ON Semiconductor
Package :
Description :
Part points
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The L4981A is a voltage regulator IC designed for use in high performance applications such as computer motherboards, servers, and industrial power supplies. It offers high efficiency, low output voltage ripple, and overcurrent protection features. With a wide input voltage range and high output current capability, it is well-suited for a variety of power management applications.
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Equivalent
Some equivalent products of the L4981A chip are L4981B, L4981D, and L4981AD. These chips are all PWM controllers designed for offline converters and have similar operating characteristics and features, making them suitable replacements for each other in many applications. -
Features
1. Primary side regulation (PSR) control with peak current mode 2. Integrated 800 V avalanche-rugged Power MOSFET 3. Adaptive UVLO with hysteresis 4. Built-in clipping from 8 V to 25 V 5. Accurate internal reference voltage 6. Protection functions: overcurrent, input/output overvoltage, feedback loop opening, short-circuit (Note: This list may not include all features of the L4981A) -
Pinout
The L4981A is a 20-pin voltage regulator IC. It functions as a high performance voltage regulator with integrated PWM controller for off-line isolated converters in TV sets, monitors, and automotive systems. It includes protections against overvoltage, overcurrent, and over-temperature conditions. -
Manufacturer
The L4981A is manufactured by STMicroelectronics, a multinational semiconductor manufacturer headquartered in Geneva, Switzerland. STMicroelectronics is a leading supplier of a wide range of semiconductor products for various applications, including automotive, industrial, and consumer electronics. -
Application Field
The L4981A is typically used in Switching Power Supply applications such as LED drivers, motor control, consumer appliances, and industrial control systems. It is also suitable for use in offline, flyback, forward, and half-bridge topologies. The device provides high efficiency, reliable performance, and protection features. -
Package
The L4981A chip is available in a TO-220 package. It is a single-phase synchronous voltage regulator IC. The size of the chip is typically 10.6 mm x 7.7 mm in terms of its dimensions.
Datasheet PDF
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