MP2764 4-21V Integrated Buck-Boost NVDC Charger QFN-32

MP2764 4-21V Integrated Buck-Boost NVDC Charger QFN-32

The MP2764 is a highly integrated buck-boost charger IC with narrow-voltage DC (NVDC) power path management control and USB power delivery (PD) source mode for 2-cell to 4- cell battery pack applications.

Key Specifications

Features

• All FETs Integration Buck-Boost Converter
• Seamless Mode Transition Between Buck/Boost and Buck-Boost Mode
• Configurable 500kHz to 1MHz Switching Frequency (fSW)
• Narrow-Voltage DC (NVDC) Power Path Management via External N-Channel Battery MOSFET (BATFET)
• Configurable Minimum and Maximum System Voltage Regulation
• System OVP and System Short-Circuit Protection (SCP)
• Dual-Phase Interleaving Operation for Buck Charging Mode with Current Balancing
• Ultrasonic Mode (USM) to Avoid Audible Noise
• Integrated 10-Bit Analog-to-Digital Converter (ADC) to Monitor the Voltage, Current, and Power
• Safety: o Thermal Shutdown o Battery Missing Detection o Battery Removal Detection o Battery Temperature Protection Compliant to JEITA Standard o Configurable Charge Safety Timer

Typical Application Circuit

Applications

• Ultrabooks

Design Notes

• Charge current accuracy depends on the sense resistor tolerance, so use a 1% or better part and keep its traces Kelvin-connected.
• Wire the NTC input for JEITA profile control if the pack is charged over temperature.
• Set the input current limit to what the adapter can actually deliver; a limit above the adapter rating causes the input rail to collapse mid-charge.
• Termination current and recharge threshold dominate cycle life in shallow-cycling products.

Common Questions