Southchip Semicon SC8112QDJR

The SC8112 is a synchronous dual-output ports buck converter with a wide input voltage from 4.6V to 36V. The SC8112 regulates the output voltage at a fixed 5V or customized voltage by setting the divider resistor. It also provides high accurate output current limit. The converter enters Constant Current (CC) Mode in case any of the two output channels reaches the setting current limit. The total output power can be programmed by a resistor, which makes it easy for constant power (CP) control. The SC8112 adopts programmable line drop compensation, programmable frequency setting and operating modes selection for PWM and PFM. With minimum external components, maximum functions can be achieved for user’s different applications. The SC8112 also supports full protections including under voltage protection, over voltage protection, short current protection and auto-restart, over temperature protection. The SC8112 adopts 32 pin QFN 5x5 package.

The SC8112 is a dual-output synchronous buck converter with a wide input voltage range. The SC8112 is configured to provide a fixed 5-V or customized output voltage programmed by FB pin. Each channel offers max 3A continuous output capacity with ±5% current limit accuracy. The SC8112 operates in a fixed frequency current mode control to regulate the output voltage in Constant Voltage (CV) mode. If output current reaches its limit, the SC8112 enters Constant Current (CC) mode while output voltage drops. If the output current still goes larger, SC8112 enters hiccup as short circuit protection when output voltage is lower than 2V. The line drop compensation, power limitation and operating frequency are programmable for different user’s application. The internal loop compensation simplifies the design process and save the external components. The SC8112 works in two different modes: PFM and PWM mode. In PFM mode, high efficiency can be achieved in light load condition. In PWM mode, the switching frequency is same both for light load and heavy load conditions and output ripple can be reduced.

• Wide input operating voltage from 4.6V to 36V
• 11mΩ/27mΩ Low Rdson Internal Power MOSFETs
• Max output capacity with 5V/6A
• 100% duty cycle operation
• Low quiescent current
• High side output current sense
• ±5% output current limit accuracy
• Programmable output power limit
• Programmable line drop compensation
• Build-in DP/DM for BC 1.2 DCP scheme
• BC1.2 DCP Mode
• Divider Mode
• 1.2V/1.2V Mode
• PFM/PWM mode selection
• Adjustable frequency 80kHz to 600kHz
• Hiccup and auto-restart
• Full protection of UVLO, OVP, OCP, OTP

• Car Charger
• Multi-Ports Wall Charger
• Hub
• Industrial applications