aat3174 Datasheet - Analogictech
The AAT3174 is a charge pump DC/DC converter designed for powering white LEDs. It operates from a single-cell battery and can drive up to 4 white LEDs.
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📝 Component Overview
The AAT3174 is a charge pump DC/DC converter designed for powering white LEDs. It operates from a single-cell battery and can drive up to 4 white LEDs. The device features a built-in power switch, a charge pump, and a feedback resistor, making it a compact solution for LED driver applications.
Key Features and Benefits
- High Efficiency: Up to 90% efficiency in boost mode
- Low Dropout Voltage: 0.2V typical at 100mA load current
- Built-in Power Switch: Reduces external component count
- Charge Pump: Allows for high efficiency in boost mode
- Feedback Resistor: Simplifies circuit design and reduces component count
- Overcurrent Protection: Prevents damage to the device and LEDs
Typical Applications
- White LED Drivers
- Camera Flash
- Mobile Phones
- PDAs
- Notebook Computers
- Camcorders
📊 Complete Technical Specifications
Absolute Maximum Ratings
| Parameter | Value |
|---|---|
| Input Voltage | 6V |
| Operating Temperature | -40°C to 85°C |
| Storage Temperature | -40°C to 150°C |
Electrical Characteristics
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Efficiency | VIN = 3.6V, IOUT = 50mA | 80% | 85% | 90% | % |
| Output Voltage | VIN = 3.6V, IOUT = 50mA | 4.5V | 5V | 5.5V | V |
Package Information
- TDFN33-12: 12-pin TDFN package
Pin Configuration
- Pin 1: VIN - Input voltage pin
- Pin 2: GND - Ground pin
🔧 Application Guidelines
Design Considerations
The AAT3174 is designed to be a simple and efficient solution for driving white LEDs. The device operates in boost mode and can drive up to 4 white LEDs. The input voltage range is from 2.7V to 5.5V, making it suitable for single-cell battery applications.
Installation Guidelines
The AAT3174 is available in a TDFN33-12 package. The device should be mounted on a PCB with adequate thermal dissipation to ensure reliable operation.
Operational Notes
The AAT3174 has a built-in overcurrent protection feature to prevent damage to the device and LEDs. The device also has a thermal shutdown feature to prevent overheating.