26.8V, 15A Boost Converter

Features 

• Input voltage range: 2.7V to 25V

• Output voltage range: up to 26.8V

• Internal Fixed PWM frequency: 350kHz

• Programmable switch peak current limit: up to 15A

• High Efficiency

95% (PVIN= 12V, VOUT=25V, IOUT =2A)

94% (PVIN= 12V, VOUT=25V, IOUT =4 5A)

93% (PVIN= 7.2V, VOUT=12V, IOUT =1.5A)

90% (PVIN= 7.2V, VOUT=12V, IOUT =5A)

96% (PVIN= 12V, VOUT=18V, IOUT =1.5A)

95% (PVIN= 12V, VOUT=18V, IOUT =6A)

• 1.0μA current consumption during shutdown

• Two modes with different tr/tf for EMI solution

• Progr ammable soft start

Output overvoltage protection (at 28V), thermal shutdown protection

• Pb-free Packages ,ESOP16, QFN3x3.5-20L

Description 

The HT7179 is a high-power density, asynchronous boost converter with a 20mQ power switch to provide a high efficiency and small size solution in portable systems. The HT7179 has wide input voltage range from2.7 V to 25 V to support applications with single cell, two cell Lithium batteries and 12V lead-acid batteries. The device has 15A switch current capability and can provide an output voltage up to 26.8V.

The HT7179 also implements a programmable soft -start function and an adjustable switching peak current limit function. HT7179 integrates two modes with different tr/tf to balance different requirements of EMI and efficiency.

In addition, the device provides 28V output overvoltage protection, and thermal shutdown protection.