HTN78A3SPER

The HTN78A3 is a 3A step-down converter with a wide input voltage range of 6V to 140V, integrating a 250mΩ high-side MOSFET. The device employs ripple-based voltage mode control with pulse skip modulation support, enabling high efficiency under light-load conditions. The switching frequency is programmable via an external resistor over a range of 100kHz to 1MHz. The device supports power conversion from high input voltage to low output voltage, with a minimum on-time of 120ns for the switching MOSFET. It provides a typical 3ms soft-start time to prevent inrush current at startup. The HTN78A3 features external loop compensation for flexible optimization of loop stability or transient response. The device offers valley current limiting, thermal shutdown protection, output overvoltage protection, output overload protection, and input undervoltage protection, housed in an ESOP8 package.

Applications

• Electric bicycles
• Solar systems
• Industrial power supplies
• Automotive systems

Key features

• 3A converter with integrated 250mΩ high-side power switch
• Input voltage range: 6V~140V
• Pulse-skip mode at light load for high efficiency
• Programmable switching frequency up to 1MHz
• COT ripple voltage mode control architecture
• OVP, OCP, and OTP protection
• Lead-free ESOP8 package