SY22159RBQ (SY7759RBQ)

·         Wide input voltage ranges from 3V to 24V

·         VOUT OVP up to 40V to cover 12-13 WLEDS application

·         Low head room(400mV) for high system efficiency

·         Channel current set in register:6-25mA

·         Adjustable switching frequency 100KHz-1.5MHz

·         Embedded Memory with MTP

·         4 dimming mode: PWM/DC/MIX/MIX-26KHz

·         Direct PWM up to 25kHz with Minimum 1.2% Duty

·         DC mode up to 2KHz with 12bit resolution (Max 12 bits DAC integrated)

·         PWM to mixed up to 2kHz with 12-bit resolution

·         PWM to mixed-26kHz up to 2kHz with 12-bit resolution

·         Protection: OVP/SLP/OLP/OTP

·         Package: WQFN-20L 3.5*3.5

The SY22159 is a high efficiency driver for white LEDs. It adopted boost controller to cover the voltage range of LED string and support 6-channel LED string with constant current which can be controlled by PWM input.

The SY22159 supports an input voltage range of 3V to 24V and output voltages up to 40V. It supports maximum current matching within 2% for excellent brightness uniformity in each string of LEDs.  The SY22159 has a high efficiency with the internal 165mohm, 40V power switch and small headroom voltage.

The SY22159 contains I2C interface for controlling the dimming mode, LED maximum current, switching frequency, and internal loop parameters. SY22159 integrates a Multiple Time Programmable Memory block (MTP) which enables storing the register data without the need to reconfigure the device after every power up sequence.

The SY22159 contains four dimming modes to choose from, which are PWM mode, DC mode, MIX mode, Mix-26k mode for different applications. PFM mode can be selected in register for higher efficiency in light-load application.

The SY22159 is available in the WQFN-20L 3.5 x 3.5 package.