In the Tokyo Big Sight International Exhibition Center at the "TECHNO-FRONTIER2011" of the "26th Power Systems Exhibition" on display at Toshiba is developing a led lights
driver IC "TB62D901FNG" (Pavilion No. 3U-204). The product vision for the office lighting and street lamps.
According to the exhibition of the narrator, the product supports three of the LED current constant current mode. Two of which are known, respectively, focus on power efficiency of the "critical model" approach and focus on reducing the number of components of the "fixed off-time" approach. The IC also supports the name "automatically adjust the frequency," the third way.
Automatic frequency adjustment method is a way to attach importance to the stability of the LED current. In addition to the LED manufacturing error and input voltage fluctuations and other changes, and changing the number of LED performance parameters such as operating voltage, the method also may change the number of external components, stability, control of the average LED current.
Toshiba IC module using the data.
"For example, the number of led bulbs
designed for the rated current of 20 circuit after the lamp goes out 2 use, or designed to envisage the use of 100V rated voltage 220V voltage current circuit is used, can easily correspond to the new parameters "(narrator). In addition, LED number 50 in the original design to 200% of range change.
The overheating of the IC with protection, overcurrent protection, overvoltage protection, low input voltage protection and ISEN terminal opening protection and other protection functions. EN signal can be controlled to stop operation of the IC. Standby current consumption of 0.8mA (max). Using SSOP16-P-225-0.65B package.