SGM37460Q

The SGM37460Q is a 6-channel high current LCD display backlight driver with integrated Boost converter. 

The SGM37460Q adopts peak current mode control for the output voltage regulation of the Boost converter. The device implements an external PMOS gate control for load disconnect. The device integrates 6 well-matched constant current sinks to control the LED string’s brightness, and each channel can provide up to 150mA constant current. The SGM37460Q provides PWM, mix and analog dimming modes. It can be set either via MIX/AD pin or I²C interface. It also has a phase-shift function to eliminate noise during PWM dimming. 

The SGM37460Q integrates a 90mΩ Boost power, combined with adaptive Boost output voltage adjustment to achieve excellent efficiency. The device implements a standard I²C interface to maximize user programmability. The Boost converter’s switching frequency can be programmed by a resistor up to 2.2MHz, or via I²C interface. External clock signal can also be synchronized with SGM37460Q to set the Boost converter’s switching frequency. 

The SGM37460Q integrates various protection features such as Boost over-current protection (OCP), Boost over-voltage protection (OVP), over-temperature protection (OTP), LED open protection, LED short protection and short LEDx-to-GND protection. In addition, the device integrates a sink current fold-back feature to reduce the sink channel current when device temperature rises above +140℃.

The device is AEC-Q100 qualified (Automotive Electronics Council (AEC) standard Q100 Grade 1) and it is suitable for automotive applications. 

The SGM37460Q is available in a Green TQFN-4×4- 24EL package with wettable flank.