SY22166QCQ (SY7758QCQ)

·       High Efficiency DC/DC Boost Converter and OTP Program Three Switching Frequency Options: 320 kHz, 635 kHz, and 1200 kHz

·        2.7V to 20V VDD Input Voltage Range Supports Multi-Cell Li-Ion Batteries

·        7V to 46V Boost Switch Output Voltage Range Supports as few as 3 WLEDs in Series per Channel and as Many as 13 pcs

·       Configurable Channel Count (1 to 6)

·       Up to 50 mA per Channel

·       PWM and I²C Brightness Control

·       Phase-shift PWM Mode Reduces Audible Noise

·       Adaptive Dimming for Higher LED Drive Optical Efficiency

·       Programmable Slew-rate Control and Frequency Jitter Scheme Minimize Switching noise and improve EMI performance

·       LED Fault (Short and Open) Detection, UVLO, TSD, OCP, and OVP (Up to 6 Threshold options)

·       Available in tiny 20-pin, 0.4-mm pitch CSP Package(CSP2.431.77-20) and 24-pin, 0.5-mm Pitch QFN package(QFN44-24)

The SY22166 device is a white-LED driver featuring an asynchronous Boost converter and six high precision current sinks that can be controlled by a PWM signal or an I²C master.

The Boost converter uses adaptive output voltage control for setting the optimal LED driver voltages as low as 7 V and as high as 46V. This feature minimizes the power consumption by adjusting the output voltage to the lowest sufficient level under all conditions.

LED current sinks can be set with the Analog dimming resolution of up to 12 bits. Adaptive dimming mode allows higher system power saving. In addition, phase shifted LED PWM dimming allows reduced audible noise and smaller Boost output capacitors.

The SY22166 device has a full set of fault-protection features that ensure robust operation of the device and external components. The set consists of input under voltage lockout (UVLO), thermal shutdown (TSD), and over current protection (OCP), up to 6 levels of overvoltage protection (OVP), LED open and short detection.

The SY22166 device is available in space-saving 20-pin CSP and 24-pad QFN packages.