Overview:
HM4251B is a single-cell lithium iron phosphate battery that can be powered by solar panels Pool charge management chip. The device includes power transistors inside, No external current detection resistor and blocking diode are required for application Tube. The internal charging current adaptive module can The current output capability of the power source automatically adjusts the charging current, and the user does not need To consider the worst case, you can maximize the use of the input power The current output capability is very suitable for the use of solar panels and other current output Application of power supply with limited output capacity. HM4251B only needs pole Few peripheral components, very suitable for the field of portable applications. The thermal modulation circuit can be used when the power consumption of the device is relatively large or the ambient temperature When the temperature is relatively high, control the chip temperature within a safe range. The internal fixed constant voltage charging voltage is 3.63V, and it can also be The external resistance is adjusted upwards. The charging current passes through an external Resistance setting. When the input voltage is powered off, HM4251B automatically enters Low-power sleep mode, the current consumption of the battery at this time is less than 3 micrometers install. Other functions include low input voltage latch, automatic recharge Battery temperature monitoring and charging status/end-of-charge status indicator Show and other functions.
HM4251B adopts thermally enhanced 8-pin small outline package (eSOP8).

FEATUREs:
● The internal charging current adaptive module is integrated, which can be adjusted according to the output The current output capability of the input voltage source automatically adjusts the charging current
● Voltages with limited output current capability such as solar panels can be used Power supply
● Input voltage range: 4.4V to 6V
● On-chip power transistor
● No need for external blocking diode and current detection resistor
● The constant voltage charging voltage is 3.63V, and it can also be Resistance to upward adjustment
● Can be used as a voltage source
● Internal soft start circuit
● In order to activate deeply discharged batteries and reduce power consumption, Use trickle charging mode when the battery voltage is low
● The continuous constant current charging current can be set up to 1A
● Use constant current/constant voltage/constant temperature mode to charge, Maximize the electrical current and prevent the chip from overheating
● Automatically enter a low-power sleep mode when the power supply voltage is off
● Dual indication output of charging status and charging end status
● C/10 charging end detection
● Automatic recharging
● Battery temperature monitoring function
● Package form eSOP8
● The product is lead-free, meets rohs, and does not contain halogen