Pittsford, NY, USA: Saelig Company, Inc. has introduced USBscope50 – possibly the world’s smallest USB DSO (Digital Storage Oscilloscope). USBscope50combines a very small form factor – similar to a memory stick – with the high performance normally associated with much larger bench-type products. Powered from a USB port, USBscope50’s modular design allows the user to configure a single channel or up to 4 channels when using multiple adapters. A proprietary synchronization system insures tight signal channel-to-channel matching and concurrent triggering. USBscope50 is small enough to be carried in a shirt pocket or laptop bag and uses standard BNC oscilloscope probes.

USBscope50 offers lots of features common on bench scopes, such as AC/DC coupling, programmable trigger threshold and edge modes, pre- and post-trigger, programmable input offset, 50MSps 8-bit sampling (1Gsps equivalent time sampling for repetitive input waveforms), 3V/30V/300V input ranges with a x10 scope probe – but adds features sometimes unavailable in even expensive scopes, such as 300V Cat II galvanic input isolation between BNC ground and USB ground. This means that there is no DC path through USBscope50 from the scope ground clip to the PC’s ground. Measured signals can be displayed with the supplied scope software, as well as stored or printed on the attached PC.

USBscope50 offers unbeatable value and convenience and is available now for under $279.00 each from Saelig Company Inc. Pittsford NY. For detailed specifications, free technical assistance, or additional information, please contact Saelig (toll-free in the US) 1-888-7SAELIG, via email: info@saelig.com, or visit www.saelig.com

MILPITAS, CA – April 8, 2010 – Linear Technology announces the H-grade version of the LT3517. The LT3517 is a high side current sense DC/DC converter designed to drive high current LEDs at constant current. Its 3V to 30V input voltage range with transient protection to 40V makes it ideal for a range of applications, including automotive, industrial and architectural lighting. The H-grade version operates with a junction temperature up to 150ºC, compared to the E- and I-grade versions’ 125ºC maximum junction temperature. All electrical specifications are identical for the E-, I- and H-grade versions. The H-grade parts are tested and guaranteed to the maximum junction temperature of 150ºC, making them ideal for automotive and industrial applications which are subjected to high ambient temperatures.

The LT3517 can drive up to four 300mA white LEDs from a nominal 12V input, making it ideal for applications such as automotive display backlighting. The LT3517 senses output current at the high side of the LED, enabling buck, buck-boost or boost configurations. The device delivers efficiencies up to 90% in boost mode from a 4mm x 4mm QFN package. The LT3517 offers True Color PWM™ dimming which ensures constant LED color with dimming ranges of up to 5,000:1. For less demanding dimming requirements, the CTRL pin can be used to provide 10:1 analog dimming. Its fixed frequency, current mode architecture offers stable operation over a wide range of supply and output voltages. A frequency adjust pin enables the user to program the frequency between 250kHz and 2.5MHz to optimize efficiency while minimizing external component size.

The LT3517HUF is available from stock in 16-pin QFN package, priced starting at $3.49 each in 1,000-piece quantities. For more information, visit www.linear.com.

Summary Features LT3517H

• 150ºC Maximum Junction Temperature
• 5000:1 True Color PWM™ Dimming Ratio
• 1.5A, 45V Internal Switch (LT3517)
• 100mV High Side Current Sense
• Open LED Protection
• Adjustable Frequency: 250kHz to 2.5MHz
• Wide Input Voltage Range: 
  • Operation from 3V to 30V 
  • Transient Protection to 40V
• Operates in Boost, Buck Mode & Buck-Boost Mode
• Gate Driver for PMOS LED Disconnect
• Constant-Current & Constant-Voltage Regulation
• CTRL Pin Provides 10:1 Analog Dimming
• Low Shutdown Current: <1µA
• Tiny (4mm × 4mm) 16-Pin QFN Package

About Linear Technology

Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, µModule® products, and many other analog functions. Applications for Linear Technology’s high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.

MILPITAS, CA – April 8, 2010 – Linear Technology announces the H-grade version of the LT3517. The LT3517 is a high side current sense DC/DC converter designed to drive high current LEDs at constant current. Its 3V to 30V input voltage range with transient protection to 40V makes it ideal for a range of applications, including automotive, industrial and architectural lighting. The H-grade version operates with a junction temperature up to 150ºC, compared to the E- and I-grade versions’ 125ºC maximum junction temperature. All electrical specifications are identical for the E-, I- and H-grade versions. The H-grade parts are tested and guaranteed to the maximum junction temperature of 150ºC, making them ideal for automotive and industrial applications which are subjected to high ambient temperatures.

The LT3517 can drive up to four 300mA white LEDs from a nominal 12V input, making it ideal for applications such as automotive display backlighting. The LT3517 senses output current at the high side of the LED, enabling buck, buck-boost or boost configurations. The device delivers efficiencies up to 90% in boost mode from a 4mm x 4mm QFN package. The LT3517 offers True Color PWM^TM dimming which ensures constant LED color with dimming ranges of up to 5,000:1. For less demanding dimming requirements, the CTRL pin can be used to provide 10:1 analog dimming. Its fixed frequency, current mode architecture offers stable operation over a wide range of supply and output voltages. A frequency adjust pin enables the user to program the frequency between 250kHz and 2.5MHz to optimize efficiency while minimizing external component size.

The LT3517HUF is available from stock in 16-pin QFN package, priced starting at $3.49 each in 1,000-piece quantities. For more information, visit www.linear.com.

Summary Features LT3517H

• 150ºC Maximum Junction Temperature
• 5000:1 True Color PWM™ Dimming Ratio
• 1.5A, 45V Internal Switch (LT3517)
• 100mV High Side Current Sense
• Open LED Protection
• Adjustable Frequency: 250kHz to 2.5MHz
• Wide Input Voltage Range: 
  • Operation from 3V to 30V 
  • Transient Protection to 40V
• Operates in Boost, Buck Mode & Buck-Boost Mode
• Gate Driver for PMOS LED Disconnect
• Constant-Current & Constant-Voltage Regulation
• CTRL Pin Provides 10:1 Analog Dimming
• Low Shutdown Current: <1µA
• Tiny (4mm × 4mm) 16-Pin QFN Package

About Linear Technology

Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, µModule® products, and many other analog functions. Applications for Linear Technology’s high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.