TCA62735AFLG

TOSHIBA CMOS INTEGRATED CIRCIUTS SILICON MONOLITHIC

TCA62735AFLG

Charge Pump type DC/DC Converter for White LED Driver

The TCA62735AFLG is a charge pump type DC/DC Converter

specially designed for constant current driving of White LED.

This IC can outputs LED current 120mA or more to 2.8-4.2V input.

This IC observes the power-supply voltage and the output voltage,

and does an automatic change to the best of step up mode 1, 1.5 or

2 times. It is possible to prolong the battery longevity to its

maximum.

This IC is especially for driving back light white LEDs in LCD of PDA,

Cellular Phone, or Handy Terminal Equipment.

Characteristics

• Output Open Detection Function

• Integrated protection circuit TSD (Thermal Shut Down)

Pin Assignment (top view)

Weight: 0.016 g (Typ.)

EN

CTL0

CTL1

CTL2

GND

C2+

C2

−

C1

−

30mA

1.0µF

C1–

C1+

EN

CTL0

CTL1

CTL2

VIN

GND

1.0µF

1.0µF

2.2µF

8kΩ

ISET

30mA

30mA

30mA

ILED4

ILED3

ILED2

ILED1

VOUT

C2–

C2+

Application Diagram

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