Product category:
Memory Devices and Modules
News Release from: Toshiba Electronics Europe | Subject: TAH8N401K and TAH6N201U
Edited by the Electronicstalk Editorial
Team on 28 July 2006
LED driver ICs save space and component
count
Constant current driver ICs with less than 8mm2 board space and built-in temperature protection deliver in excess of 90% efficiency
Toshiba Electronics Europe has announced two new ultra-miniature, high-efficiency, low-noise constant current LED driver ICs (CC-driver) The TAH8N401K and TAH6N201U 'non up-convert type' drivers will save board space, minimise component count and reduce power consumption in backlight, indicator light, and other LED driver applications
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
Related stories
Microcontroller meets needs of modern appliances
Toshiba Electronics Europe has launched a flash microcontroller specifically designed to meet the needs of modern home appliance applications including washing machines, dryers, and dishwashers.
First 7.7-inch low-temp polysilicon LCD for eBooks
Toshiba today announced commercialisation of a 7.7-in low-temperature polysilicon TFT LCD designed for mid-size electronic book devices incorporating Microsoft ClearType display technology
The TAH8N401K is a 4-channel driver supplied in Toshiba's US8 package with a footprint of 3.1mm x 2.0mm.
The TAH6N201U 2-channel driver is supplied in Toshiba's UF6 package and has a footprint of 2.0mm x 2.1mm.
Both drivers have a profile of less than 0.8mm.
In the simplest configurations only a single external resistor is connected to the reference voltage pin to set the drive current.
This allows engineers to implement LED driver circuitry within a maximum board space of around 9mm2.
As the built-in protection circuitry adjusts the LED drive current with increasing temperature no external compensation circuit is needed, contributing to further space and component count reductions.
Additionally, operation of the CC-drivers in linear control mode is possible with an external PWM signal (1to 100kHz) applied to either the control or reference voltage pin of the device.
In this operation mode linear control between shutdown mode and full driving current is possible by adjusting the duty cycle of the PWM signal.
Ideal for portable and battery-powered electronic equipment, the new TAH8N401K and TAH6N201U drivers operate with power supply voltages of 2.5V and 5.5V.
Efficiency is in excess of 90% with a supply voltage of 3.6V.
The new driver ICs are designed for parallel LED connection and can deliver drive currents up to a maximum of 25mA per channel.
Maximum power dissipation is 400mW for the 4-channel driver and 200mW for the 2-channel device.
• Toshiba Electronics Europe: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
