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Home > Semiconductors > Power Management ICs > Power Factor Correction ICs > STMicroelectronics L4981AD013TR PFC Controller 100KHZ, 19.5V, SOIC-20

STMicroelectronics L4981AD013TR PFC Controller 100KHZ, 19.5V, SOIC-20

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St Micro - St Micro L4981Ad013Tr Power Factor Correction PWM CONTRLR 0.3mA 115KHz 20-Pin SOIC T/ R

STMicroelectronics L4981AD013TR PFC Controller 100KHZ, 19.5V, SOIC-20

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STMicroelectronics - St Micro L4981Ad013Tr Power Factor Correction PWM CONTRLR 0.3mA 115KHz 20-Pin SOIC T/ R
L4981A: Fixed Frequency Average Current Mode; L4981B: Line Modulated Frequency Average Current Mode

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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 anyline switch. This new PFC offers the possibility to work at fixed frequency (L4981A) or modulated frequency (L4981B) optimizing the size of the input filter; both the operating frequency modes 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. The overcurrent level can be programmed using simple resistor for L4981A. For a better precision and for L4981B an external divider must be used.

Additional Information

L4981AD013TR
Manufacturer: STMicroelectronics
Product Category: Power Factor Correction - PFC
Brand: STMicroelectronics
Switching Frequency: 115 kHz
Maximum Operating Temperature: + 125 C
Mounting Style: SMD/SMT
Package / Case: SO-20
Minimum Operating Temperature: - 40 C
Series: L4981
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