Lithium-Ion Linear Battery Charger Controller with Thermistor Interface The LTC4050EMS-4.2#PBF is a lithium-ion battery charger manufactured by Linear Technology (now part of Analog Devices). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Linear Technology (Analog Devices)
- **Part Number:** LTC4050EMS-4.2#PBF
- **Package:** MSOP-10
- **Input Voltage Range:** 4.25V to 6.5V
- **Charge Voltage:** 4.2V (fixed for single-cell Li-Ion batteries)
- **Charge Current:** Programmable up to 800mA
- **Preconditioning:** Yes (for deeply discharged cells)
- **Charge Termination:** C/10 (10% of programmed current)
- **Battery Detection:** Automatic (no battery = no charge)
- **Thermal Regulation:** Yes (prevents overheating)
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
- The LTC4050EMS-4.2#PBF is a standalone linear charger designed for single-cell lithium-ion (Li-Ion) or lithium-polymer (Li-Po) batteries.
- It integrates a precision voltage regulator, current sensing, and charge termination logic.
- The device operates in three phases: **preconditioning, constant current, and constant voltage.**
- It includes thermal feedback to regulate charge current and prevent overheating.
- No external MOSFET, blocking diode, or current-sense resistor is required.
### **Features:**
- **Complete Charger:** No external components needed except for input/output capacitors.
- **Programmable Charge Current:** Adjustable via an external resistor.
- **Automatic Recharge:** Initiates charging if battery voltage falls below 4.05V.
- **Charge Status Output:** Open-drain pin indicates charging or completion.
- **Low Battery Leakage:** <2µA when input power is removed.
- **Thermal Protection:** Reduces charge current if temperature exceeds safe limits.
- **Small Footprint:** MSOP-10 package for space-constrained applications.
This information is strictly based on the manufacturer's datasheet and technical documentation.
