Overview
The LC05111C05MTTTG is a protection IC designed for 1-cell lithium-ion secondary batteries, manufactured by onsemi. This IC integrates highly accurate detection circuits and power MOSFETs to protect batteries from over-charging, over-discharging, over-current discharging, and over-current charging. It is part of the LC05111CMT series and can be used to create a comprehensive battery protection system with minimal external components.
Key Specifications
| Parameter | Symbol | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|---|
| Supply voltage | VCC | Between PAC+ and VCC: R1 = 680 Ω | -0.3 | - | 12.0 | V |
| S1 - S2 voltage | VS1-S2 | - | - | - | 24.0 | V |
| Charge or discharge current | BAT-, PAC- | - | - | - | 10.0 | A |
| Storage temperature | Tstg | - | -55 | - | 125 | °C |
| Operating ambient temperature | Topr | - | -40 | - | 85 | °C |
| Allowable power dissipation | Pd | Glass epoxy four-layer board | - | - | 450 | mW |
| Over-charge detection voltage | Vov | R1=680 Ω, 25°C | Vov_set - 25 | Vov_set | Vov_set + 25 | mV |
| Over-discharge detection voltage | Vuv | R1=680 Ω, 25°C | Vuv_set - 50 | Vuv_set | Vuv_set + 50 | mV |
| Charge over-current detection | Ioch | - | - | - | ±0.7 | A |
| Discharge over-current detection | Ioc | - | - | - | ±0.7 | A |
Key Features
- Integrated charge and discharge power MOSFETs with a total ON resistance of 11.2 mΩ (typical) at Ta = 25°C, VCC = 4.5 V.
- Highly accurate detection circuits for over-charge, over-discharge, over-current charging, and over-current discharging.
- Over-charge detection voltage accuracy of ±25 mV and over-discharge detection voltage accuracy of ±50 mV at Ta = 25°C, VCC = 3.7 V.
- Charge and discharge over-current detection of ±0.7 A.
- Internal resistance (VCC-CS) of 300 kΩ and (VSS-CS) of 15 kΩ at specific conditions.
- Detection delay times for over-charge and over-discharge protection.
- Compact WDFN6 package with dimensions 2.6x4.0 mm, 0.65P, Dual Flag (Pb-Free / Halogen Free).
Applications
- Lithium-ion battery packs for portable electronics such as smartphones, tablets, and laptops.
- Electric vehicles and hybrid electric vehicles.
- Energy storage systems and renewable energy applications.
- Medical devices and other battery-powered equipment requiring high reliability and safety.
- Consumer electronics and IoT devices.
Q & A
- What is the primary function of the LC05111C05MTTTG IC?
The primary function is to protect 1-cell lithium-ion batteries from over-charging, over-discharging, over-current charging, and over-current discharging.
- What are the key features of the integrated MOSFETs in the LC05111C05MTTTG?
The integrated MOSFETs have a total ON resistance of 11.2 mΩ (typical) at Ta = 25°C, VCC = 4.5 V.
- What is the accuracy of the over-charge and over-discharge detection voltages?
The over-charge detection voltage accuracy is ±25 mV, and the over-discharge detection voltage accuracy is ±50 mV at Ta = 25°C, VCC = 3.7 V.
- What are the charge and discharge over-current detection limits?
The charge and discharge over-current detection limits are ±0.7 A.
- What is the operating ambient temperature range for the LC05111C05MTTTG?
The operating ambient temperature range is -40°C to +85°C.
- What is the allowable power dissipation for the LC05111C05MTTTG?
The allowable power dissipation is 450 mW on a glass epoxy four-layer board.
- How does the IC protect against over-charging?
The IC turns off the internal power MOSFET (CHG_SW) if the cell voltage exceeds the over-charge detection voltage after a specified delay time.
- What conditions must be met for recovery from over-charging?
The charger must be removed, and the cell voltage must drop below the over-charge release voltage.
- What is the package type and dimensions of the LC05111C05MTTTG?
The package type is WDFN6 with dimensions 2.6x4.0 mm, 0.65P, Dual Flag (Pb-Free / Halogen Free).
- What are some common applications for the LC05111C05MTTTG?
Common applications include lithium-ion battery packs for portable electronics, electric vehicles, energy storage systems, medical devices, and consumer electronics.
