austriamicrosystems
announced the AS3645, an inductive, ultra small, high-efficiency single/dual
LED flash driver that it claims offers 25% higher output current than existing
equivalents.
According to
austriamicrosystems, the higher flash power enhances picture and video quality
especially in low-light environment at the same system size. The AS3645
inductive flash driver drives up to 1000 mA and can be used in single LED flash
or double LED flash environments. The high-side current source works with up to
2x500 mA with 2 LEDs in serial configuration, and up to 720 mA with 1 LED. When
driving 2 LEDs in series, LEDs draw identical currents and provide output light
matching and thermal dissipation.
The AS3645
auto detects whether to employ single or dual LED mode, and enables direct
one-button torch (flashlight) mode. Safety features protect against circuit
damage and improve test time, including programmable current limiting, auto
test (LED open/short detection), overvoltage and undervoltage, overtemperature,
and automatic flash timeout timer for thermal LED protection during flash. The
AS3645 is available in a tiny WL-CSP package (3x4 balls 0.5 mm pitch, 2x1.6 mm)
and has an operating temperature range of -30° to +85°C (ambient).
Pricing:
Less than $0.90 in 1000-piece quantities.
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