product description
HM1494 is a pulse width modulation step-down power management integrated circuit that meets the QC 2.0 fast charge protocol, and its built-in output Output constant current and constant voltage function, and adopt non-synchronous rectification technology, the conversion efficiency can reach up to 92%, HM1494 can support 5V, 9V Two voltage outputs.
HM1494 Built-in line loss compensation function and provide stable voltage output, and built-in a variety of protection functions, such as VDD over voltage protection, VDD under voltage lockout, over temperature protection, over current protection and short circuit protection and other functions. HM1494 It has the function of automatically detecting whether the connected power device supports Qualcomm 2.0 fast charge, such as power device support Qualcomm Quick Charge 2.0 protocol, HM1494 is to complete the quick charging process by adjusting the output voltage, such as the connected power device Qualcomm Quick Charge 2.0 protocol is not supported. HM1494 means the default output is 5V, and charging is in normal charging mode. The HM1494 package adopts SOP-8, which has a small package size and few peripheral components. It is suitable for small-volume USB fast charging applications and Power scheme.

Features
■Support Qualcomm 2.0 fast charge protocol, support Type A and Type B interface
■Support 5V and 9V output voltage
■Compatible with USB battery charging BC1.2 specification
   1), USB charging port D+/D- automatic short circuit function
   2), the default 5V working mode
■Input voltage range: 8V-36V
■Fixed working frequency: 150KHZ
■Maximum output current 3.0A
■Output voltage accuracy:  3%
■Output current accuracy:  5%
■Built-in programmable line loss compensation function
■Built-in output over-voltage protection function
■Built-in input undervoltage protection function
■Built-in soft start function
■Built-in over-temperature protection function
■Built-in overcurrent protection function
■Built-in output short-circuit protection function
■Available in SOP-8 package

Applications
■Car charger
■Charger supporting QC 2.0 fast charging protocol
■DC-DC power supply