CAT3661: LED Driver, Low Power, 1-Channel _ BDTIC a Leading Distributor in China

CAT3661: LED Driver, Low Power, 1-Channel

The CAT3661 is a high efficiency low power 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 the CAT3661 ideal for EMI sensitive applications. The charge pump supports a wide range of input voltages from 2.0 V to 5.5 V.The CAT3661 has a built-in circuitry to provide feedback to a microcontroller of Open/Short LED and Low battery events. The Low battery indicator trip point is internally fixed at 2.4 V. External resistors can be added to raise or lower the trip voltage, if needed.The device is packaged in the tiny 16-lead TQFN 3 mm x 3 mm package with a max height of 0.8 mm.The inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x tri-mode charge pumps with no added external capacitors.

CAT3661: LED Driver, Low Power, 1-Channel

Features

Quad Mode Charge Pump: 1x, 1.33x, 1.5x, 2x
Low Quiescent Current 150 A Typical
Drives One LED up to 5 mA
Optimized for Coin Cell Battery Operation
Open/Short LED Fault Detection
Adjustable Low Battery Detection
Power Efficiency up to 92%
Low Noise Input Ripple in All Modes
Zero Current Shutdown Mode
Soft Start and Short Circuit Current Limiting
Thermal Shutdown Protection

Benefits

Higher efficiency charge pump than competition, very compact solution, no inductor.
High efficiency LED driver even at low LED current below 5mA.

Applications

Low Power LCD Display Backlight
Low Power Handheld Device Backlight

Application Notes (1)

Document Title	Document ID/Size	Revision	Revision Date
CAT3661 LED Driver Evaluation Board	AND9013-D (165.0kB)	0

Package Drawings (1)

Document Title	Document ID/Size	Revision
TQFN16, 3x3	510AD (55.6kB)	A

Data Sheets (1)

Document Title	Document ID/Size	Revision	Revision Date
LED Driver, 1-Channel Low-Power	CAT3661/D (410kB)	2	Aug, 2014

Order Information

Product	Status	Compliance	Package		MSL*	Container		Budgetary Price/Unit
CAT3661HV3-GT2	Active	Pb-free Halide free	TQFN-16	510AD	1	Tape and Reel	2000	$0.8666

Specifications

Product	Topology	VIN Min (V)	VIN Max (V)	VO Max (V)	IO Max (mA)	fSW Typ (kHz)
CAT3661HV3-GT2	Charge Pump	2	5.5	6	6	100

LED Driver, 1-Channel Low-Power (410kB) CAT3661

CAT3661 LED Driver Evaluation Board CAT3661

TQFN16, 3x3 CAT3661

CAT3661