Maxim launch small size independent integrated LED drive products

Maxim is an independent IC, integrated LED display driver and key input. Ideal for use in battery powered tools, electric bicycles, portable household appliances and ultra portable mobile PC.

DS2788 through the 14 pin TSSOP package in the integration of multi-channel dedicated LED driver and all the way to enter the button to achieve the industry's smallest size solutions. LED driver can directly absorb the current, only a resistor to set the LED display current, further reducing the space and cost.

Maxim Integrated DS2788 launched the industry's smallest size independent, multi section Li+ battery meter, a single IC integrated LED driver and key input Products. For compact battery pack space, the device is designed as a lead free 14 pin TSSOP package. DS2788 ideal for use in power tools, electric bicycles, portable household appliances and ultra portable mobile PC.

The DS2788 reports the remaining capacity of the battery pack to the host in two forms: "remaining Ma hours" and "percentage of full capacity", and the result is shown by the output of the 4 or all of the 5 LED drivers. Each LED driver can directly absorb the current, only one resistor can set the LED display current, thereby reducing the board space and system costs. A programmable I/O pin can be configured to go all the way to jitter key input to enable LED display.

In order to reduce the requirement of software development, shorten the time to market, DS2788 use the built-in power calculation method, the amount of charge and discharge rate, accurate temperature and battery characteristics, as well as accurate battery current and voltage measurement based on the calculation of the remaining power. Through the internal calibration of the external voltage divider for measuring the input voltage of the battery, the battery can accurately detect the multi section Li+ battery pack. In order to save battery energy, the external FET switch is driven by a pin, and only the voltage divider is opened during the voltage measurement. The capacity of the battery pack is transferred to the host through a 1-Wire interface to reduce the number of necessary connections between the battery pack and the host to 3.

In addition, DS2788 also provides 16 bits EEPROM, dedicated to the host system and / or battery manufacturers. The EEPROM can be used to simplify battery batch and Date tracking, and can also be used for nonvolatile storage of system or battery usage data. The only, factory set of 64 bit ROM ID ensures that any of the two DS2788 is not the same, so that the full tracking of the battery group is possible.

Source: Ledinside