TOP POWER ASIC TP8305B-SOT236

TP8305B is an input voltage range (0.8~5.5V), adjustable constant current and the current limit of two modes to drive white LED designed to boost DC / DC converter. Variable frequency mode, by-cycle current limit, output current with the input power supply voltage is reduced even change. The device can use a single or dual battery drive single power white LED, can also use a lithium battery-powered two, three or multiple WLED. Driving method WLED connected in series to provide equal WLED current, resulting in uniform brightness. Low 46mV feedback voltage minimizes power dissipation in the current setting resistor, thereby improving efficiency. 50mV current limit feedback voltage, current limit can be set according to different needs.

• External NMOS, Output voltage is adjustable, It can drive high voltage, high power load, such as 10V1A.
• Drive 0.3W - 7W of single white LED
• Drive multiple pieces WLED lamp
• Efficiency up to 90%
• 0.8V low operating voltage
• Constant current accuracy: ± 5%
• Limit accuracy: ± 6%; Limiting voltage: 50mV.
• VDD over voltage shutdown
• Temperature protection (130 ℃ protection point)

• A constant current source, such as LED flashlight, backlight, etc.
• A constant voltage source, and Bluetooth speaker, mobile power, etc.
• Input current needs precisely defined situations, such as limiting the program LED Flashlight