TB62732FUG Datasheet, PDF (1/18 Pages) Toshiba Semiconductor – Step-up DC/DC Converter for White LED Driver

TB62732FUG
TOSHIBA BiCD Digital Integrated Circuit Silicon Monolithic
TB62732FUG
Step-up DC/DC Converter for White LED Driver
The TB62732FUG is a high-efficiency step-up DC/DC converter
designed and optimized for the constant-current lighting of white
LEDs.
This IC is particularly suitable for illuminating two to four
serial white LEDs with a Li-ion battery.
The IC incorporates an N-ch MOS transistor, which is
necessary for switching of the coil.
Also, the LED current IF can be easily set through the use of
an external resistor.
The TB62732FUG is best suited for use as a driver for white
LED source backlighting in color LCDs used on PDAs, cellular
phones and handy terminal devices.
The suffix (G) appended to the part number represents a Lead
(Pb) -Free product.
Weight: 0.016 g (typ.)
Features
• LED current values can set through the use of an external resistor
15 mA (typ.) @R_sens = 3.3 Ω
18.5 mA (typ.) @R_sens = 2.7 Ω
• Efficiency of 80% realized (serial LEDs 2 to 3, IF = 20 mA)
• Maximum output voltage: Vo = 17 V
• Output power: Up to 320 mW supported
• Compact package: 6-pin SOT23 (SSOP6-P-0.95B)
• Built-in N-channel MOS with low ON-resistance (Ron)
Ron = 2.0 Ω (typ.) @VCC = VIN = 3.6 V
• Switching frequency: 1.1 MHz (typ.)
• Output capacitor
Small capacity of 0.47 µF
• Inductance: 2.2 µH to 10 µH
Pin assignment (top view)
K
A
<
GND
GND
SHDN
V_CC
Note 1: This product contains pins that are vulnerable to electrostatic discharge. Handle with care.
This IC may break if mounted 180 degrees in the reverse direction. Be sure to orientate the IC in the
correct direction.
1
2006-06-14