Super capacitor LED camera flash 4A single chip driver

A Morimi semiconductor (ONSemiconductor) introduced the industry's first 4 AMP (A) super capacitor light-emitting diode (LED) flash drive - CAT3224. This new device complies with the emerging truly high intensity LED flash requirements, applied to high - megapixel camera phones and independent cameras. This highly integrated device has all the features required to accurately control the LED flash charge / discharge, including a power switch capable of receiving up to 4A current, as well as charging for dual unit (dual-cELl) super capacitors. The CAT3224 solution is easy to use, with a simple parallel logic interface activated three completely independent mode (charging, flash and flashlight), the working current of each mode to 3 external resistors for simple programming. A Morimi semiconductor in this quarter will launch more high-power super capacitor LED flash drive.

High - megapixel camera phones and independent cameras require extremely high levels of flash to produce high - quality photographs, especially in low - or medium light conditions. The new LED design on the market can meet this requirement, but alone the camera battery, and can not provide enough high peak current pulse to drive the LED flash, to achieve the desired brightness of the high-resolution photos. Other features that require high peak current, such as zoom, auto focus, image capture, D audio and RF (RF) amplification, further deteriorate the power problem.

A Morimi semiconductor's new LED driver works with the latest generation of super capacitors to help designers effectively eliminate these power management issues. The super capacitor releases electrical energy at its peak load and continues to recharge, even when the flash power reaches its peak. The CAT3224LED driver controls the charging of the super capacitor, thereby providing more power to other peak current circuits. This super capacitor LED driver is designed to provide true high intensity flash and richer system functionality while significantly extending battery life.

The advantages of the super capacitor technology peak current, combined with the CAT3224 simple parallel logic interface, makes this device an excellent choice for industrial applications using LED instead of xenon lamps.

A Morimi semiconductor Catalyst product marketing vice president of ScottBrown, said: CAT3224 super capacitor LED driver for high-intensity LED flash function provides integrated, easy to use, cost-effective solution. We believe that this combination of super capacitor technology such as CAP-XX, significantly improved, and constantly improve the performance of white LED, took the lead for the next generation of high xsga mobile phone camera to provide real and independent high strength LED flash. "

CAT3224 super capacitor LED driver supports three key features: precision super capacitor charging control, current discharge to LED flash management, as well as constant current for the LED flashlight mode. CAT3224 analog control circuit on the external resistance of the simple programming, absorption of up to 4A LED flash current and up to 400mA flashlight mode current. This device integrates a dual mode 1x/2x charge pump, the charge pump will be stacked super capacitor charging to 5.4V rated voltage, while the active balance control circuit to ensure that the voltage of the two super capacitor unit in charge cycle matching. In addition, the CAT3224 provides a dedicated logic output for the user, marking the completion of the super capacitor charging sequence.

CAT3224 uses a space saving 16 lead TQFN3mmx3mmx0.8mm package with thermal shutdown, over voltage protection (OVP) and external resistor programming fault protection features. This device also supports reverse output voltage under all operating conditions.

Characteristic

Flash mode, the output channel, each channel 2A

Flashlight mode output channels, and each channel 200mA

1000mA can regulate the charging current limit

Double charging unit of super capacitor

Flash / torch mode independently of current regulation

Package: 16 pin TQFN, 3mmx3mmx0.8mm

CAT3224 is an important component of A Morimi semiconductor application of four main subsystems for portable product lineup of new. This device is designed to meet the requirements of the display and backlight subsystem. In addition to the display and backlight subsystem, A Morimi semiconductor also provides solutions for the interconnection of handheld devices, power management and audio / video three major subsystems.