ON Semiconductor Introduces CAT3661, Quad Mode LED Driver for Ultra Low Power LED Applications
ON Semiconductor introduced the CAT3661 – a new one-channel Quad-Mode™ LED Driver for ultra low power LED applications such as portable handheld medical equipment.
The CAT3661 is a high efficiency low power quad-mode fractional charge pump that drives one LED with up to 5 mA of current. Soft-start current limiting and short-circuit protection are optimized for use with coin cell batteries.
Low noise input ripple and constant switching frequency allows
the use of small external ceramic capacitors. This makes CAT3661
ideal for applications which are likely sensitive to EMI. Quad-Mode charge pump supports a wide input voltage range of 2.0 V to 5.5 V.
The CAT3661 is a system to provide feedback to build Microcontroller Open / short LED and low battery event. Low Battery indicator trip point internally at 2.4 V. The solid outer Resistors can be added to raise or lower the voltage trip, if necessary.
CAT3661 – Quad-Mode LED Driver
(Photo from ON Semiconductor Website)
The device is packaged in a tiny 16-pin TQFN 3 mm x 3 mm package with a maximum height of 0.8 mm.
The device is packaged in the tiny 16-pin TQFN 3 mm x 3 mm package with a max height of 0.8 mm.
The inclusion of 1.33 x fractional charge pump mode increases device efficiency up to 10% over traditional 1.5x Tri-Mode charge pumps without adding an external capacitor. 1.33x charge pump with two fly capacitors patented architecture to ON Semiconductor.
More information about Quad Mode LED Driver can be found at ON Semiconductor Website