LTC3216(RevA) Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

LTC3216
(Rev.:RevA)

1A Low Noise High Current LED Charge Pump with Independent Torch/Flash Current Control

Linear Technology 

LTC3216

TYPICAL APPLICATIO S

Similarly, in 2x boost mode, the efficiency is similar to that

of a linear regulator with an effective input voltage of 2

times the actual input voltage. In an ideal 2x charge pump,

the power efficiency would be given by:

ηIDEAL

≡

PLED

PIN

=

VLED •ILED

VIN • 2 •ILED

≈

VLED

2 • VIN

(7)

Thermal Management

For higher input voltages and maximum output current,

there can be substantial power dissipation in the LTC3216.

If the junction temperature increases above approximately

150°C, the thermal shutdown circuitry will automatically

deactivate the output. To reduce maximum junction tem-

perature, a good thermal connection to the PC board is

recommended. Connecting the Exposed Pad to a ground

plane and maintaining a solid ground plane under the

device can reduce the thermal resistance of the package

and PC board considerably.

3216fa

10

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