TK11851LTL-G

The TK11851LTL-G is a pulse skipping step-up DC-DC converter IC designed for White LED driver applications with the following built in: a very high current switching transistor(400 mA peak), an inductor current limit detector, a low voltage reference (Vref = 0.515 V), a high speed oscillator,an error comparator, a zener diode for open-circuit protection and an on/off control. The IC works with a very wide
operating supply range (2.3 V to 10 V) and the adjustable output voltage can be set as high as 20 V. The device is in the ON state when the En pin is pulled to a high level. Using the very small TK11851LTL-G and a few external components, battery powered systems with LCD displays,such as digital cameras and cellular phones, can be effectively backlit with white LEDs.

TK11851LTL-G has many unique features: The first one is very high speed adjustable OSC (800kHz max). The second one is very wide operating voltage range (2.3 to 10V). The third one is Low loss detector (low reference voltage: Vref=0.515V). The forth one is it operates with TOKO d31fu, D31FB miniature coil(current limited by inductor current sensor),etc.There are some absolute maximum ratings about it. Operating voltage range(Vop) is 2.3 V to 10 V. Operating temperature range(Top) is -30 to +85.Power dissipation(PD) is 400 mW. Operating frequency range(fop) is 800 kHz. 􀂄  􀂄
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