Overview
The CAT32 is a CMOS white LED driver from ON Semiconductor, designed as a DC/DC step-up converter. It delivers a regulated output current and operates at a constant switching frequency of 1.2 MHz. This device is particularly suited for applications requiring efficient and compact LED driving solutions.
Key Specifications
| Parameter | Rating/Range | Unit |
|---|---|---|
| VIN, LED, SHDN voltage | 2 to 7 | V |
| SW voltage | 20 | V |
| RSET voltage | 1 | V |
| Storage Temperature Range | −65 to +150 | °C |
| Junction Temperature | 125 | °C |
| Lead Soldering Temperature (10 secs) | 300 | °C |
| ESD Rating – Human Body Model | 2000 | V |
| Inductor L1 | 6.8 ±20% typical | μH |
| Input Capacitor C1 | 4.7 ±20% typical | μF |
| Output Capacitor C2 | 1.0 ±20% typical | μF |
| ILED with 1 to 4 LEDs in series | 0 to 20 | mA |
Key Features
- Low Quiescent Ground Current (0.5 mA Typical)
- Power Efficiency Over 80%
- Compatible Pinout with LT1932
- Adjustable Output Current (up to 40 mA)
- High Frequency 1.2 MHz Operation
- Input Voltage Operation down to 2.0 V
- Low Resistance (0.5 Ω) High Voltage Power Switch
- Drives up to 4 White LEDs in Series
- Shutdown Current Less than 1 μA
- Load Fault Protection Against Open-circuits
- Low Value External Components
- Low Profile (1 mm) TSOT-23 6-lead Package
- Pb-Free, Halogen Free/BFR Free and RoHS Compliant
Applications
- Color LCD and Keypad Backlighting
- Cellular Phones
- Handheld Terminals
- Digital Cameras
- PDAs/Games
- Portable MP3 Players
Q & A
- What is the typical quiescent ground current of the CAT32?
The typical quiescent ground current of the CAT32 is 0.5 mA.
- What is the maximum number of white LEDs the CAT32 can drive in series?
The CAT32 can drive up to 4 white LEDs in series.
- What is the operating frequency of the CAT32?
The CAT32 operates at a constant switching frequency of 1.2 MHz.
- What is the minimum input voltage for the CAT32?
The minimum input voltage for the CAT32 is 2.0 V.
- Does the CAT32 have load fault protection?
- What is the package type and height of the CAT32?
The CAT32 is available in a low profile (1 mm max height) 6-lead TSOT-23 package.
- Is the CAT32 RoHS compliant?
- What are some typical applications for the CAT32?
Typical applications include color LCD and keypad backlighting, cellular phones, handheld terminals, digital cameras, PDAs/games, and portable MP3 players.
- What is the shutdown current of the CAT32?
The shutdown current of the CAT32 is less than 1 μA.
- What is the efficiency of the CAT32?
The power efficiency of the CAT32 is over 80%.
