AnalogicTech has introduced a new 4
Advanced Analogic Technologies AAT3104 and AAT3195 announced the launch of two new 4-channel, charge pump LED driver, they simplify the functions of mobile phones and portable systems for larger-screen LCD display. Compact 2 x 2.1mm packages, the devices in a space-saving footprint for the designers within the 16-step, 32 step or pulse-width modulation (PWM) current control. Compared with competing solutions, AAT3104 and AAT3195 drivers times and 2 times using a high efficiency charge pump mode, reducing external component count by 25%. Between adjacent LED in order to provide uniform brightness and perfect match, AAT3104 provides common anode structure for general-purpose current inhalers, and AAT3195 supports common structure for the common cathode source.
"Engineers for the entry-level mobile phone or other portable systems to add new features, it is usually integrated into their designs more shows," AnalogicTech says Phil Dewsbury, product line director. "By providing the necessary forward bias LED constant current system output voltage, and control, set with 4 LED's common anode and common cathode configurations required for current methods, AnalogicTech rich new LED driver product line these two chips, the space-saving package for portable system designers to improve design flexibility, provides high power efficiency, reducing component count and increasing the current control options. "
Multiple interface options
AAT3104 is a current source LED driver capable of providing for the 4 up to 30mA per LED current. Charge pump-based device automatically times and two times in a switch between modes in order to maximize efficiency and optimize LED current accuracy and matching. LED output current accuracy is + / – 10%. LED output current matching is + / – 3%.
AAT3104 switch operation frequency 1 MHz, patented by AnalogicTech single type S2Cwire interface, can provide 16-step (AAT3104-1) or 32-step (AAT3104-2) LED brightness control of the two versions. AAT3105's PWM version of the upcoming delivery.
Cathode structure for use of LED, AAT3195 offers a charge pump-based current source LED driver for 4-channel applications. And AAT3104 similar, AAT3195 can be up to 4 provide up to 30mA per LED current. AAT3195 also automatically fold and 2 times in a switch between models to ensure maximum efficiency and current accuracy and matching. LED output current accuracy is + / – 10%, LED output current matching is + / – 3%.
AAT3195 switching frequency operation of 1 MHz, the interface provided by the three different versions. AAT3195-1 through S2Cwire interface, can provide 32-step adjustable 30mA current; AAT3195-2 by S2Cwire interface, support for 32-step of 20mA current. AAT3195-3 with a PWM interfaces.
Both drives with automatic soft start, power-saving, low current shutdown mode and built-in temperature protection.
Price and Availability
AAT3104 and AAT3195 are rated operating temperature range is-40o C to +85 o C. Are using 2 x 2.1mm, 10 – pin SC70JW package. AAT3104 in order for 1000 units is priced at 0.87 U.S. dollars per piece, AAT3195 in order for 1000 units is priced at 0.87 U.S. dollars per piece.
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