austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: ams sales ams.com Please visit our website at www.ams.com AS3693B austriamicrosystems Product Specification, Confidential AS3693B16 Channel high precision LED driver for LCD Backlight 1 General Description The AS3693B is a 16 channels high precision LED controller with build in PWM generators for driving external FETs in LCD-backlight panels. External clock and synchronizing inputs allow the synchronization of the LCD backlight with the TV picture. Local dimming and scan dimming is supported by 16 independent PWM generators with programmable delay, period and duty cycle. Three free configurable dynamic power feedback circuits make the device usable for white LED as well as RGB backlights. Build in safety features include thermal shutdown as well as open and short LED Free programmable 12 bit resolution ( period, detection. All circuit parameters are programmable high time and delay ) via I2C or SPI interface. Overvoltage detection ( short LED ) Undervoltage detection ( open LED ) Temperature shutdown Fault interrupt output 2 Key Features H-Sync, V-Sync inputs to synchronize with TV- set Internal or external PWM clock 16 Channel LED driver I2C interface Output current only limited by external SPI interface transistor 5 bit device - address (sets device address Output voltage 0.4V to 50V and interface mode) Absolute current accuracy +/- 0.5% Automatic supply regulation feedback Output slew rate programmable Each output can be assigned to red, green or Current programmable with external resistor blue feedback. Linear current control with 8 - bit DAC Package epTQFP64 and QFN64 Linear current control with external analog voltage Digital current control with 16 independent PWM generators 3 Applications LED backlighting for LCD TV sets and monitors www.austriamicrosystems.com Revision 1.21 / 2011-09-30 1 - 32 ams AG Technical content still valid