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PAM2804 Datasheet(PDF) 1 Page - Power Analog Micoelectronics |
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PAM2804 Datasheet(HTML) 1 Page - Power Analog Micoelectronics |
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1 / 11 page  Features Applications General Description n n n n n n n n n n n Efficiency up to 93% 180 A(TYP.) Quiescent Current Output Current: Up to 1A Internal Synchronous Rectifier 1.5MHz Switching Frequency Soft Start Under-Voltage Lockout Short LED Protection Open LED Protection Thermal Shutdown 5-pin Small SOT23-5 Packages 3AA or 4AA Batteries Powered Flashlight 1 Cell Li-Ion Battery Powered Flashlight The PAM2804 is a step-down constant current LED driver. When the input voltage down to lower than LED forward voltage, then PAM2804 run into LDO mode. The PAM2804 supports a range of input voltages from 2.5V to 6.0V, allowing the use of a single Li+/Li-polymer cell, 3AA or 4AA cell, USB, and other standard power sources. The FB voltage is only 0.1V to achieve high efficiency. PAM2804 employ internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 1 A. Other key features include under-voltage lockout to prevent deep battery discharge of the Li+ battery. . μ μ n n n Pb-Free Package Typical Application 1 www.poweranalog.com PAM2804 1A Step-Down Constant Current, High Efficiency LED Driver 10/2010 Rev1.0 , Power Analog Microelectronics Inc VIN SW GND EN L 4.7µH Co 10µF V C IN IN 10µF Rs FB WLED 1~5W ILED =0.1/Rs 3AA or 4AA Batteries 1 Cell Li-Ion Battery |
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Similar Description - PAM2804 |
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