MP2759
Highly integrated 5A switching battery charger with NVDC power path and I2C interface for single-cell Li-ion and Li-p...
Product Overview
Description
The MP2759 integrates a 5A synchronous switching charger with NVDC (Narrow Voltage DC) power path management. This architecture allows the system to operate from the adapter while independently charging the battery, enabling instant-on functionality even with deeply discharged batteries.
The I2C interface provides full programmability of charge parameters including charge current, termination current, and float voltage. Integrated ADC monitors battery voltage, charge current, and temperature for safe charging. The device supports USB BC1.2 and proprietary adapter detection.
Advanced features include JEITA-compliant charging for battery safety, USB On-The-Go (OTG) boost mode for powering USB accessories, and comprehensive protection functions. The high-efficiency switching topology minimizes heat generation during fast charging.
Product Series
MP
Primary Application
Smartphones
Key Features
- 5A switching charger
- NVDC power path
- I2C interface
- USB OTG
- JEITA compliant
Specifications
| Input Voltage | 3.9V to 14V |
|---|---|
| Battery Type | Single-cell Li-ion/Li-polymer |
| Charge Current | Up to 5A |
| Efficiency | Up to 93% |
| Float Voltage | 3.85V to 4.4V (programmable) |
| Operating Temperature | -40°C to +85°C |
| Package | QFN-26 (4mm x 4mm) |
Applications
Smartphones
Electronic system design
Tablets
Electronic system design
Portable devices
Electronic system design
Power banks
Electronic system design
Handheld instruments
Electronic system design
FAE Expert Insights
"The MP2759 is my top recommendation for smartphone and tablet charging applications. The NVDC power path is a game-changer - users can power on their devices immediately even with dead batteries. The 5A charging capability enables fast charging while the 93% efficiency keeps the device cool. The I2C interface makes it easy to integrate with the system's power management IC. I've used this in several flagship smartphone designs with excellent results. The JEITA compliance ensures battery safety across temperature ranges. One tip: pay attention to the PCB thermal design around the package - while efficient, 5A still generates heat that needs to be dissipated."
Excellent NVDC power path with 5A fast charging and 93% efficiency
— Sarah Wang, BeiLuo
Frequently Asked Questions
How does the NVDC power path work?
NVDC (Narrow Voltage DC) power path separates system power from battery charging. The system operates from a regulated voltage (typically 3.5-4.4V) while the battery charges independently. Benefits include: 1) Instant-on - system powers up immediately when adapter connected, even with dead battery. 2) Pass-through mode - system runs from adapter with minimal battery cycling. 3) Supplement mode - battery supplements adapter during peak loads. 4) Minimized charge/discharge cycles - extends battery life.
Use NVDC architecture for devices requiring instant-on capability or minimal battery cycling.
How do I program the charge parameters via I2C?
The MP2759 I2C interface allows programming of all charge parameters. Key registers: 0x00 - Charge Current (0-5A in 64mA steps), 0x01 - Input Current Limit, 0x02 - Float Voltage (3.85-4.4V), 0x03 - Termination Current. Write to these registers to configure charging. Read registers 0x10-0x1F for status including battery voltage, charge current, and fault conditions. The device supports standard and fast I2C modes (100kHz and 400kHz).
Download the MP2759 programming guide and GUI software for easy register configuration.
What is the USB OTG functionality?
USB On-The-Go (OTG) allows the device to power USB accessories when no adapter is present. The MP2759 boosts battery voltage (3-4.4V) to 5V at up to 1.5A to power USB devices. This is useful for smartphones powering USB flash drives or tablets powering peripherals. The OTG mode is enabled via I2C and includes current limiting and short-circuit protection. Battery voltage monitoring ensures safe operation without over-discharging.
Enable OTG functionality for devices that need to power USB accessories.
How does JEITA compliance improve battery safety?
JEITA (Japan Electronics and Information Technology Industries Association) defines safe charging temperature ranges. The MP2759 implements JEITA by: 1) Reducing charge current at temperatures above 45°C. 2) Reducing float voltage at temperatures above 50°C. 3) Suspending charging below 0°C or above 60°C. This prevents battery damage from charging at extreme temperatures. The device uses an external NTC thermistor for temperature sensing with programmable thresholds.
Enable JEITA compliance for all Li-ion battery applications to ensure safety and longevity.
What protection features are integrated?
The MP2759 includes comprehensive battery protection: 1) Over-voltage protection (OVP) - stops charging if battery voltage exceeds threshold. 2) Over-current protection (OCP) - limits charge and discharge currents. 3) Thermal regulation - reduces charge current if die temperature exceeds 120°C. 4) Timer protection - safety timer prevents indefinite charging. 5) Reverse leakage protection - prevents battery discharge back to input. 6) Short-circuit protection - limits current during battery shorts.
Review protection specifications to ensure they meet your application's safety requirements.