BD28C57LFJ-LBE2

BD28C57LFJ-LBE2 is a BD28C5xFJ-LB series PWM-type DC/DC converter IC. The PWM type DC/DC converter for AC/DC provides an optimal system for all products that require an electrical outlet. This IC supports both isolated and non-isolated devices and enables simpler designs of various types of low-power consumption electrical converters. This IC has a lineup of VDD UVLO that supports both Si and SiC of MOSFETs. Power supplies can be designed flexibly by connecting a current detection resistor to the switching externally. Current is restricted in each cycle and excellent performances are demonstrated in the bandwidth and transient response since a current mode control is utilized. The switching frequency can be set by an external resistor and capacitor on the RTCT pin. Applications include industrial equipment and PV inverters.

• PWM current mode method, low power consumption
• VDD pin UVLO function, switching frequency setting pin
• Over current protection function per cycle
• 18.8V / 14.5V VDD UVLO, 50% max ON duty
• Operating temperature range from -40°C to +125°C
• SOP-J8 package
• Input voltage range : 6.90V to 28.00V
• Startup current is 60µA typ at VDD = 6.5V, VDD = 20V, Ta =-40°C to +125°C
• Unity gain bandwidth is 1.5MHz typ at VDD = 20V, Ta =-40°C to +125°C
• Circuit current is 2.0mA max at VDD = 20V, Ta =-40°C to +125°C