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STMICROELECTRONICS L4981BD
PFC Controller IC, Power Factor 0.99, 19.5 V & 12 mA Supply, 18 V Lockout, 80 kHz, SOIC-20
- Manufacturer:
- STMICROELECTRONICS STMICROELECTRONICS
- Manufacturer Part No:
- L4981BD
- Order Code:
- 1094224
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- Product Range
- -
- Technical Datasheet:
- L4981BD Datasheet
- ECAD / MCAD
-
Product Overview
The L4981BD is a Power Factor Corrector 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 modulated frequency optimizing the size of the input filter; the operating frequency mode working with an average current-mode PWM controller, maintaining sinusoidal line current without slope compensation. Besides power MOSFET gate driver, precise voltage reference (externally available), error amplifier, under-voltage lockout, current sense and the soft start are included. To limit the number of the external components, the device integrates protections as overvoltage and overcurrent.
- 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
- Under voltage lockout with hysteresis and programmable turn on
- Threshold overvoltage, overcurrent protection
- Precise 2% on chip reference externally available
- Soft-start
Applications
Power Management
Warnings
Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.
Product Information
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- Continuous Conduction Mode
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- Average Current
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- Variable
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- 18V
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- 19.5V
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- SOIC
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- 20Pins
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- Surface Mount
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- 100kHz
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- 85kHz
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- 115kHz
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- -40°C
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- 125°C
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- -
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- -
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- MSL 3 - 168 hours
Technical Documents (3)
2,184 In stock Need more?
2,184 deliver in 3-4 business days from our UK warehouse :(UK stock) Order before 17:00 Mon-Fri (excluding National Holidays)
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Extra stock is available upon order to the Supplier Lead Time which is approximately 9/8/25
2,184 deliver in 3-4 business days from our UK warehouse
Due to market conditions delivery times are for general guidance only and may be subject to change at short notice
¥421.66
(
¥463.83
Inc. JCT)
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| 1+ | ¥421.66 (¥463.83) | ( ) |
| 10+ | ¥277.45 (¥305.20) | ( ) |
| 25+ | ¥270.14 (¥297.15) | ( ) |
| 50+ | ¥262.83 (¥289.11) | ( ) |
| 100+ | ¥255.51 (¥281.06) | ( ) |
| 250+ | ¥242.97 (¥267.27) | ( ) |
| 500+ | ¥240.88 (¥264.97) | ( ) |
| 1000+ | ¥238.78 (¥262.66) | ( ) |
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