Analog Devices announces the Power by Linear LTC4041, a complete supercapacitor backup power management system for 2.9V to 5.5V supply rails that must be kept active during a main power failure. Supercapacitors have higher power density than batteries, making them ideal for systems requiring high peak power backup for short periods of time.
- View the LTC4041 product page, download data sheet, order samples and evaluation boards: www.analog.com/LTC4041
The LTC4041 includes an optional overvoltage protection (OVP) function using an external FET which can protect the IC from input voltages greater than 60V. An internal supercapacitor balancing circuit maintains equal voltages across each supercapacitor and limits the maximum voltage of each supercapacitor to a predetermined value. Its adjustable input current limit function enables operation from a current limited source while prioritizing system load current over battery charge current. An external disconnect switch isolates the primary input supply from the system during backup. The device also includes input current monitoring, an input power fail indicator, and a system power fail indicator.
The LTC4041 is offered in a low profile (0.75mm) 24-lead 4mm x 5mm QFN package with backside metal pad for excellent thermal performance. The device operates from –40°C to 125°C, in both E and I grades.
Summary of Features: LTC4041
- 2.5A Step-Down Supercapacitor Charger & 2.5A Step-Up Backup Supply
- 6.5A Switches for 2.5A Backup from One Supercapacitor or Two in Series
- Input Current Limit Prioritizes Load over Charge Current
- Input Ideal Diode Isolates Input During Backup
- Automatic Seamless Switchover to Backup Mode
- Internal Supercapacitor Balancer (No External Resistors)
- Programmable Charge Current & Charge Voltage
- Input Power Fail Indicator
- System Power Good Indicator
- Optional OVP Circuitry Protects Device to >60V
- Constant Frequency Operation
- Thermally Enhanced 24-Lead 4mm × 5mm QFN Package
