LED driver delivers up to 350 mA from single cell

27 July 2005 Power Electronics / Power Management

Linear Technology's LTC3490 is a synchronous boost DC/DC converter optimised for driving high current white LEDs.

The LTC3490 operates at up to 90% efficiency, maximising battery run time while its input voltage range of 1 V to 3,2 V enables it to deliver up to 350 mA from either a single or dual cell alkaline/NiMH battery. Its output voltage range of 2,8 V to 4 V is fully compliant with the forward voltage requirements of high current LEDs.

The device provides constant current drive for LED applications requiring up to 1 W of power. When its output load is disconnected, it limits the output voltage to 4,7 V, providing enhanced system reliability. Onboard analog dimming capability reduces the LED drive current proportionally to the CTRL-pin voltage. A low-battery logic output signals when the battery voltage has dropped below 1 V.

The LTC3490 comes in 3 x 3 mm DFN or SO-8 package, and with its 1,3 MHz switching frequency offers a very small 1 W solution footprint for portable lighting and rechargeable flashlight applications.

Further reading:

Wine farm turns to solar installation for power
Current Automation Power Electronics / Power Management
Slanghoek Wine farm opted into a power purchase agreement to lower overall electricity costs and enter a true sustainable future, with a price-competitive edge on lower running costs.

Read more...

---

Industrial PSU family
Brabek Power Electronics / Power Management
The RACPRO1 family of PSUs supports a universal DC input voltage range from 430 to 850 V DC, allowing the parts to support renewable energy and microgrid applications.

Read more...

---

Integrated POL voltage regulators
EBV Electrolink Power Electronics / Power Management
Infineon’s TDA38807 and TDA38806 are their highest density high-efficiency integrated point-of-load (IPOL) solutions for smart enterprise systems.

Read more...

---

Hi-Rel quarter-brick converters
Accutronics Power Electronics / Power Management
Gaia Converter’s quarter-brick series DC-DC power modules provides output power levels ranging from 75 to 250 W in fixed output voltages.

Read more...

---

1700 V GaN Switcher IC
Future Electronics Power Electronics / Power Management
Power Integrations has introduced a new member of its InnoMux-2 family of single-stage regulated multi-output offline power supply ICs, the industry’s first 1700 V gallium nitride switch.

Read more...

---

How ADI battery management solutions empower safer, smarter robots
Altron Arrow Editor's Choice Power Electronics / Power Management
Choosing an appropriate battery pack and its accompanying battery management system is a critical decision in designing an autonomous mobile robot.

Read more...

---

Industrial power supply range
RFiber Solutions Power Electronics / Power Management
SynQor’s ruggedised AC-DC and DC-DC converters and filters are designed for a wide range of industrial applications, including those required to withstand harsh environments.

Read more...

---

PSUs for industrial applications
Power Electronics / Power Management
RECOM’s REDIIN120/240/480 series of AC-DC converters perfectly corresponds with customer needs by exhibiting high efficiency and low energy consumption at no load.

Read more...

---

Highest density automotive-grade power modules
Altron Arrow Power Electronics / Power Management
Vicor has released three automotive-grade power modules for 48 V EV systems, which deliver industry-leading power density.

Read more...

---

MOSFET for automotive applications
Altron Arrow Power Electronics / Power Management
Infineon’s OptiMOS 7 100 V is offered in the company’s versatile and robust, high-current SSO8 5 x 6 mm² SMD package.

Read more...

---