TB62731FUG Datasheet, PDF (1/20 Pages) Marktech Corporate – Step-up DC-DC Converter for White LED Driver

TB62731FUG
TOSHIBA BiCD Digital Integrated Circuit Silicon Monolithic
TB62731FUG
Step-up DC-DC Converter for White LED Driver
The TB62731FUG is an LED driver that uses a high power
efficiency step-up DC-DC converter. The converter turns on/off 2
to 6 white LEDs in series.
The IC incorporates an N-channel MOSFET transistor used for
coil-switching and a function that reduces the LED current in
response to increase in temperature.
The mean LED current can be easily set using an external
resistor.
The IC is ideal as a driver for LED light sources used as liquid
crystal backlights for PDAs, cellular phones, and handy
terminals.
The suffix (G) appended to the part number represents a Lead
(Pb) -Free product.
Weight: 0.016 g (typ.)
Features
• Maximum output voltage: Vo ≤ 28 V
• Mean LED current values set according to external resistor
14 mA (typ.) @R_sens = 2.7 Ω
20 mA (typ.) @R_sens = 1.8 Ω
• Supply power: Up to 320 mW supported
• Compact package: SSOP6-P-0.95B, 6 pins
• Built-in temperature derating function: LED current derated automatically depending on temperature
• High power efficiency
Up to 80% of peak power efficiency achieved using recommended components
Ron = 2.0 Ω (typ.) @VIN = 3.2~5.5 V
Built-in low Ron power MOS switch
Pin assignment (top view)
K
GND
SHDN
A
GND
V_CC
1
2006-06-14