MP2624

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I2C Controlled 4.5A Single Cell USB / Adaptor Charger with Narrow VDC Power Path Management and USB OTG



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Product Description

The MP2624 is a 4.5A, highly integrated, switching-mode battery charger IC for single-cell Li-ion or Li-polymer batteries. This device supports NVDC architecture with power path management suitable for different portable applications, such as tablets, MID, and smart phones. Its low impedance power path optimizes efficiency, reduces battery charging time, and extends battery life. The I2C serial interface with charging and system settings allows the device to be controlled flexibly.
The MP2624 supports a wide range of input sources, including standard USB host ports and higher power wall adapters. The MP2624 detects the input source type according to the USB Battery Charging Spec 1.2 (BC1.2) and then informs the host to set the proper input current limit. Also, this device is compliant with USB2.0 and USB3.0 power specifications by adopting a proper input current and voltage regulation scheme. In addition, the MP2624 supports USB On-The-Go operation by supplying 5V with current up to 2.0A.
The power path management regulates the system voltage slightly above the set maximum voltage between the battery voltage and the I2C programmable lowest voltage level (e.g. 3.6V). With this feature, the system is able to operate even when the battery is depleted completely or removed. When the input source current or voltage limit is reached, the power path management reduces automatically the charge current to meet the priority of the system power requirement. If the system current continues increasing, even when the charge current is reduced to zero, the supplement mode allows the battery to power both the system and the input power supply at the same time.
The MP2624 is available in a QFN-22 3mm x 4mm package.

Product Features

  • High Efficiency 4.5A 1.5MHz Buck Charger and 1.5MHz 2.0A Boost Mode to Support OTG
  • o 94% Efficiency @ 2A, 92% @ 4A
  • o Fast Charge Time by Battery Path Impedance Compensation
  • o USB OTG
  • o 94% Efficiency @ 5V, 1.2A OTG
  • o Selectable OTG Current Outputs
  • 3.9V to 7.0V Operating Input Voltage Range
  • Highest Battery Discharge Efficiency with 10mΩ Battery Discharge MOSFET up to 9A
  • Single Input USB Compliant Charge
  • Narrow System Bus Voltage Power Path Management
  • o Instant On Works with No Battery or Deeply Discharged Battery
  • o Ideal Diode Operation in Battery Supplemental Mode
  • Constant-Off-Time Control to Reduce Charging Time under Lower Input Voltages
  • High Accuracy of Charging Parameter
  • I2C Port for Flexible System Parameter Setting and Status Reporting
  • Full DISC Control to Support Shipping Mode and System Restart
  • High Integration
  • o Fully Integrated Power Switches and No External Blocking Diode and Sense Resistor Required
  • o Built-In Robust Charging Protection including Battery Temperature Monitor and Programmable Timer
  • o Built-In Battery Disconnection Function
  • High Accuracy
  • o ±0.5% Charge Voltage Regulation
  • o ±5% Charge Current Regulation
  • o ±5% Input Current Regulation
  • o ±2% Output Regulation in Boost Mode
  • Safety
  • o Battery Temperature Sensing for Charge Mode
  • o Battery Charging Safety Timer
  • o Thermal Regulation and Thermal Shutdown
  • o Input/System Over-Voltage Protection
  • o MOSFET Over-Current Protection
  • Charging Operation Indicator
  • Thermal Limiting Regulation on Chip
  • Tiny QFN-22 3mm x 4mm Package

Parametrics

  • Operating Vin (min) (V)3.6
  • Operating Vin (max) (V)7
  • Absolute Vin (max) (V)20
  • Number of Series Cells1
  • GradeCatalog
  • NVDCYes
  • Vbatt (max) (V)4.425
  • Vbatt (min) (V)3.48
  • Battery TypeLi-Ion, Li-FePO4, Li-Polymer
  • Iotg (A)1.3
  • Iin (max) (A)3
  • Icharge (max) (A)4.5
  • Votg (max) (V)5
  • TopologyBuck
  • fsw (kHz)1700
  • Control InterfaceI2C
  • Special FeaturesBattery OCP, Battery UVP, Input Current Regulation, JEITA Batt NTC Monitor, Narrow Voltage Power Path, Thermal Regulation, USB BC1.2 Detection, USB Compatible, USB OTG (Boost Mode), VIN Regulation
  • PackageQFN-22 (3x4)
  • TimerYes
  • NTC MonitoringYes
  • EN ControlYes
  • Internal LDOYes
  • Charge Status Yes
  • Idis (A)6