Description

The ZXLD1615ET5 is a PFM inductive boost converter designed for driving 2, 3, or 4 series connected white LEDs from either a Li-Ion cell or a 5V supply. It operates with an input supply of 2.5V to 5.5V and can provide an adjustable output current of up to 50mA. With an internal 30V NDMOS switch, current sense, and open circuit protection, the ZXLD1615ET5 ensures reliable performance and safety. It also offers true analog dimming via PWM, allowing for precise adjustment of LED brightness.

Specifications and features

• Low profile SC70 6 pin package
• Internal PWM filter for flicker-free output
• High efficiency (80% typ)
• Wide input voltage range: 2.5V to 5.5V
• Up to 50mA output current
• Low quiescent current: 60μA typ
• 500nA maximum shutdown current
• Up to 1MHz switching frequency
• Low external component count
• Inherently matched LED currents

Application Scenarios

• Mobile phones
• Digital cameras
• PDAs
• LCD modules
• Portable internet appliances
• Palmtop computers

Comparison

- Can drive 2, 3, or 4 series connected white LEDs

- Adjustable output current of up to 50mA

- Internal 30V NDMOS switch, current sense, and open circuit protection

- True analog dimming via PWM

- Limited to driving white LEDs

- Input supply range of 2.5V to 5.5V

- Requires a low profile SC70 6 pin package

- May require additional external components for specific applications