Tentative
TB62750FTG
TOSHIBA BiCD Digital Integrated Circuit Silicon Monolithic
TB62750FTG
Step Up Type DC-DC Converter for White LED
TB62750FTG is the high efficient STEP-UP type DC/DC converter by
which the optimal design was carried out at constant current driver of
white LED.
It is possible to drive white LEDs whose constant output current is 800mA
by the lithium ion battery.
This IC contains the Nch-MOS transistor required for switching of external
inductor.
The forward current of LED is set up by the external resistor.
This IC is the most suitable as a driver of camera flashes and strobes in
the cellular phone, the PDA, the DSC, and other mobiles.
■
Features
・Switching
terminal current
・Maximum
output power
・Maximum
output voltage
・Operating
frequency
・Four
operating modes
Light mode
Flash mode
・High
efficiency
:ILED=350mA(Typ.) (R3=8.2kΩ,R2=62kΩ)
:ILED=800mA(Typ.) (RSENS=0.375Ω)
:Maximum efficiency : 80%(In the flash mode)
Application
VIN(3.0�½�4.2)
L
S-Di
:1.8A(Typ.)
:
:10V
:2MHz
（
ＶQON24-0404-0.65
）
Weight：
0.09g
現品表示 ；
(Typ.)
Shutdown mode :Icc=0.01µA(Typ.)
Cin
OVP
Cout
VIN
SW1SW2 SW3
K1
K2
K3
800mA (TYP)
EN2
EN1
SS
Css
PGND1
PGND3
GND
PGND2
IL
RSENS1
RSENS2
RSENS3
FB+
FB-
R3
R4
R2
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