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.
