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Fairchild Semiconductor

82 Running Hill Road
South Portland, ME 04106
USA
WebSite: http://www.fairchildsemi.com
Phone: 207-775-8100
Fax: 207-775-8745
   

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Authorized Distributors for Fairchild Semiconductor:
ARROW ELECTRONICS FARNELL element14 UK
ARROW - VERICAL DIVISION MOUSER ELECTRONICS
AV CONCEPT SINGAPORE PTE LTD NEWARK ELEMENT14
AVNET EXPRESS AMERICAS ROCHESTER ELECTRONICS, LLC
AVNET EXPRESS ASIA RUTRONIK ELEKTRONISCHE GMBH
AVNET EXPRESS EUROPE SAMTEK SEMICON DEVICES HK, LTD
DIE TECHNOLOGY LTD TEAMPO TECHNOLOGY CO
DIGI-KEY CORPORATION TECO ENTERPRISE CO LTD

Recent Articles for Fairchild Semiconductor:
Solutions for mobile audio fidelity and functionality
In the mobile market, audio fidelity and functionality continue to drive new innovations for listening to music, watching movies, . . .
Designing-in LED driver reliability: Smart non-isolated PFC
Electronic manufacturers battling product reliability issues with their designs revealed the need to measure and quantify how well a . . .
Reverse polarity switch protects mobile devices
The FR011L5J low-side reverse polarity protector and the FR014H5JZ high-side reverse polarity protector with integrated over-voltage transient suppression (OVS) . . .
Balancing power parameters in LED applications: Part 2 — Cost-effective solutions for LED designs <35 W
Low-power LED solutions typically consist of a single-string of LEDs or a single input and output control point for . . .
Low-power LED drivers reduce board space, design time
The FLS0116, FLS3217, and FLS3247 LED drivers with integrated MOSFET and power factor correction are optimally designed for low-power . . .

Videos for Fairchild Semiconductor:
FT8010 reset timer - Fairchild Semiconductor
Talk with Daniel Dodbout, Director, Technical Marketing Logic Group, at Fairchild Semiconductor, South Portland, Maine
Recovering from the White Screen of Death with Fairchild’s FT8010 reset timer. The FT8010 reset timer targets cell phone designs that need to reset the hardware when the device locks up, without having to remove the battery. The IC offers reset at the touch of a designated keypad function with 7.5- and 11.5-s reset options to avoid unintended resets caused by accidental key presses
Reference Design Documents for Fairchild Semiconductor:
KA431A Adjustable/2.5V, 1% Tolerance Shunt Regulator
The KA431/KA431A/KA431L are three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between VREF (approximately 2.5 volts) and 36 volts with two external resistors. These devices have a typical dynamic output impedance of 0.2W. Active output circuitry provides a very sharp turn-on characteristic, making these devices excel lent replacement for zener diodes in many applications.
SG6741 Highly-Integrated Green-Mode PWM Controller
The highly integrated SG6741 series of PWM controllers provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to linearly decrease the switching frequency at light-load conditions. To avoid acoustic-noise problems, the minimum PWM frequency is set above 18KHz. This green-mode function enables the power supply to meet international power conservation requirements. With the internal high-voltage start-up circuitry, the power loss due to bleeding resistors is also eliminated. To further reduce power consumption, SG6741 is manufactured using the BiCMOS process, which allows operating current as low as 4mA. SG6741 integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. Its built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary internal line compensation ensures constant output power limit over a wide range of AC input voltages, from 90VAC to 264VAC. SG6741 provides many protection functions. In addition to cycle-by-cycle current limiting, the internal open-loop protection circuit ensures safety when an open-loop or output short-circuit failure occurs. PWM output is disabled until VDD drops below the UVLO lower limit; then the controller starts again. As long as VDD exceeds about 26V, the internal OVP circuit is triggered. SG6741 is available in an 8-pin DIP or SOP package.
SG6742 Highly-Integrated Green-Mode PWM Controller
The highly integrated SG6742 series of PWM controllers provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to linearly decrease the switching frequency at light-load conditions. To avoid acoustic noise problems, the minimum PWM frequency is set above 22KHz. This green-mode function enables the power supply to meet international power conservation requirements. With the internal high-voltage start-up circuitry, the power loss due to bleeding resistors is eliminated. To further reduce power consumption, SG6742 is manufactured using the BiCMOS process, which allows an operating current of 4mA. SG6742 integrates a frequency a hopping function that helps reduce EMI emission of a power supply with minimum line filters. Also, its built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary internal line compensation ensures constant output power limit over a wide AC input voltages, from 90VAC to 264VAC. SG6742 provides many protection functions. In addition to cycle-by-cycle current limiting, the internal open-loop protection circuit ensures safety should an open-loop or output short-circuit failure occur. PWM output is disabled until VDD drops below the UVLO lower limit when the controller starts up again. As long as VDD exceeds about 26V, the internal OVP circuit is triggered. SG6742 is available in an 8-pin DIP or SOP package.
FAN5336 1.5MHz 33V Supply boost converter with integrated FET
The FAN5336 is a high-efficiency, low-noise, fixed-frequency PWM, current-mode, DC-DC boost regulator. It is designed for small LCD bias supply and white LED backlight supply applications. Depending on the application, a FAN5336 regulator can output up to 33V at up to50mA output current. With output voltage up to 21V, the output current can be up to 100mA. FAN5336 can be used for power conversion as low as 9V output voltage. A current-mode control loop has a fast transient response that provides excellent load regulation within 0.2% of output voltage. The FAN5336 switches at fixed 1.5MHz frequency, allowing the use of small, low-cost external components. Constant frequency switching results in low input noise and small output capacitors. FAN5336 provides cycle-by-cycle current limiting up to1.5A peak current. The FAN5336 may be used to drive a serial flash LED with up to 100mA current at 21V for a maximum of 400ms on-time and 10% duty cycle. A low-EMI mode reduces interference and radiated electromagnetic energy caused by the ringing of the inductor. Additional features include thermal shutdown, over-voltage protection, cycle-by-cycle current limit, low ripple, and soft-start support. The device is available in a 3x3mm 6-lead MLP, 0.8mm thickness package.
FAN5333B Adjustable, 1.6MHz Boost Regulator with 30V Integrated FET Switch
The FAN5333A/FAN5333B is a general purpose LED driver that features fixed-frequency mode operation and an integrated FET switch. This device's high output power makes it suitable to drive flash LEDs in serial connections. This device is designed to operate at high switching frequencies in order to minimize switching noise measured at the battery terminal of hand-held communications equipment. Quiescent current in both normal and shutdown mode is designed to be minimal in order to extend battery life. Normal or shutdown mode can be selected by a logic level shutdown circuitry. The low ON-resistance of the internal N-channel switch ensures high efficiency and low power dissipation. A cycle-by-cycle current limit circuit keeps the peak current of the switch below a typical value of 1.5A. The FAN5333A/FAN5333B is available in a 5-lead SOT-23 package.
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