ver: 0.7 mar 08, 2012 tel: 886-3-5788833 http://www.gmt.com.tw 1 at1316a global mixed-mode technology high efficiency, constant current 20v white- leds driver feature ? operating voltage: 2.5v to 5.5v. ? high operating frequency: 1mhz ? high output voltage: up to 20v(typ.) ? digital dimming control. ? built-in cycle-by cycle current-limiting. ? built-in soft-start function. ? 0.1v/0.2v/0.3v low reference voltage ? thermal overload protection ? tsot-23-6 package application gps navigation system compact back light module constant current source led module description the at1316a step-up converter drives white leds with a constant current to provide backlight in cell phones, pdas, and other hand-held devices. it features allowing series connection of the white leds so that the led currents are identical for uniform brightness. an enable input can be pulsed repeatedly to adjust led?s brightness. the fast 1.0 mhz current-mode pwm control allows for smaller capacitor and inductor. fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. also included soft-start eliminates inrush current during start-up. the low reference voltage minimized the power loss across the current-setting resistor. the at1316a is available in tsot-23-6 packages. ordering information order number marking voltage temp. range package (green) at1316a-01tp1u 3a01x 0.1v -40 c to 85 c tsot-23-6 at1316a-02tp1u 3a02x 0.2v -40 c to 85 c tsot-23-6 AT1316A-03TP1U 3a03x 0.3v -40 c to 85 c tsot-23-6 note: tp : tsot-23-6 1 : bonding code u: tape & reel pin configuration typical application circuit vin en tsot-23-6 6 4 1 lx 2 3 gnd fb at1316a ovp 5 at1316a use the tantalum capacitor to eliminate inductor noise on output terminal when you want to control dimming function. vin en tsot-23-6 6 4 1 lx 2 3 gnd fb at1316a ovp 5 at1316a use the tantalum capacitor to eliminate inductor noise on output terminal when you want to control dimming function.
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