Key facts
- Brand
- Catalyst
- Model
- CAT3644
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-04
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Catalyst CAT3644 LED Driver Datasheet
The CAT3644 is a 4‑channel ultra‑high‑efficiency Quad‑Mode™ LED driver that can drive up to four LEDs at 25 mA each. It features a 1‑wire EZDim™ digital dimming interface, low‑noise input ripple, soft‑start, short‑circuit and thermal‑shutdown protection, and a “zero” current shutdown mode. The device is offered in a compact 3 mm × 3 mm 16‑pad TQFN package.
Typical applications include LCD backlights, cellular phones, digital still cameras, and other handheld devices. The datasheet provides absolute maximum ratings, recommended operating conditions, pin descriptions, timing diagrams, and extensive performance graphs covering efficiency, quiescent current, and output characteristics over voltage and temperature ranges.
Catalyst CAT3644 specifications
| Input voltage range | 2.5 V to 5.5 V |
|---|---|
| LED forward voltage range | 1.3 V to 4.3 V |
| Power efficiency | up to 92 % |
| Package | 3 mm × 3 mm 16‑pad TQFN |
| Quiescent current (1× mode) | 1.0 mA |
| Quiescent current (2× mode) | 2.4 mA |
| EN/DIM logic high level | 1.3 V |
| EN/DIM logic low level | 0.4 V |
| Thermal shutdown temperature | 150 °C |
| Internal pull‑down resistor (EN/DIM) | 100 kΩ |
All Catalyst CAT3644 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the input voltage range for the CAT3644?
The device operates from 2.5 V up to 5.5 V.
How many LEDs can the CAT3644 drive and at what current?
It can drive up to four LEDs, each at up to 25 mA.
What is the input voltage range for the CAT3644?
The CAT3644 operates with an input voltage from 2.5 V to 5.5 V.
How many LEDs can the CAT3644 drive?
It can drive up to four LEDs, each at 25 mA.