CAT4109V-GT2

CAT4109V-GT2 is a compact LED driver IC (constant-current) used to drive an LED string from a DC supply. It’s designed for small to mid-size LED modules such as indicators, backlighting, and compact automotive or portable lighting.
Key points:
- Constant-current LED drive with user-set current (via external components or a reference/CTRL input, depending on variant).
- Dimming capability (PWM or analog) for brightness control.
- Built-in protections (short/open LED, overcurrent/overvoltage, thermal protection).
- Small GT2 variant package suitable for compact board integration.
- Commonly used in indicators, backlights, and auxiliary automotive/portable lighting.
How it works (high level):
- VIN powers the IC; LED string connects to the OUT pin.
- LED current is set by external components; DIM/CTRL or PWM input modulates brightness.
- Protections guard against fault conditions to improve reliability.
For precise electrical specs, pinout, package details, and programming, consult the official datasheet from the manufacturer for CAT4109V-GT2. If you share your application context, I can tailor a quick setup outline.

I don’t have the exact datasheet on hand, but CAT4109V-GT2 is a compact constant-current LED driver IC. Typical features you can expect:
- Constant-current drive for a single LED string, programmable via an external resistor
- Dimming options: PWM dimming and/or analog dimming
- Wide input voltage range with high efficiency
- Soft-start to reduce inrush and EMI
- Protection: undervoltage lockout, overcurrent/short-circuit protection, and over-temperature shutdown
- LED open-detection and fault latch (open-LED/LED fault reporting)
- Enable/disable control
- Small GT2 package with minimal external components
For precise electrical specs (IC current, voltage ranges, dimming ratios, tolerances), please share the datasheet link or confirm the manufacturer, and I’ll pull exact figures.

GT2 indicates an 8-pin small-outline package (SOP-8/MSOP-8 family). For exact dimensions, check the CAT4109V-GT2 datasheet.

- Pin count: 28 pins (GT2 package variant)
- Function: 9-channel constant-current LED driver (sink). Each channel’s current is programmable (external resistor), with dimming/control via a digital interface for LED backlight applications.

Typical applications for the CAT4109V-GT2 include:
- LCD/display backlighting
- Indicator LEDs and signage lighting
- Automotive interior/exterior lighting
- Portable or battery-powered LED lamps
- Architectural or decorative LED lighting