MC33349N-4R1 Datasheet – Lithium Battery Protection Circuit
Lithium Battery Protection Circuit for One Cell Battery Packs
MC33349N-4R1 overview
The MC33349N-4R1 is a Lithium Battery Protection Circuit for One Cell Battery Packs made by ON Semiconductor, supplied in a Sot-23 Type package. The absolute maximum ratings table on this page lists the 4 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the MC33349N-4R1 pinout and maximum ratings, with the full datasheet PDF to preview below or download.
The MC33349 is a monolithic lithium battery protection circuit that is designed to enhance the useful operating life of a one cell rechargeable battery pack. Cell protection features consist of internally trimmed charge and discharge voltage limits, discharge current limit detection, and a low current standby mode when the cell is discharged. This protection circuit requires a minimum number of external components and is targeted for inclusion within the battery pack
Datasheet
MC33349N-4R1 features
- Internally Trimmed Charge and Discharge Voltage Limits
- Discharge Current Limit Detection
- Low Current Standby Mode when Cells are Discharged
- Dedicated for One Cell Applications
- Minimum Components for Inclusion within the Battery Pack
- Available in a Low Profile Surface Mount Package
MC33349N-4R1 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | DO | This output connects to the gate of the discharge MOSFET allowing it to enable or disable battery pack discharging. |
| 2 | P– | This pin monitors cell discharge current. The excess current detector sets when the combined voltage drop of the charge MOSFET and the discharge MOSFET exceeds the discharge current limit threshold voltage, V(DET3). The short circuit detector activates when V(P–) is pulled within 0.8V of the cell vo |
| 3 | CO | This output connects to the gate of the charge MOSFET allowing it to enable or disable battery pack charging. |
| 4 | Ct | This pin connects to the external capacitor for setting the output delay of the overvoltage detector (VD1). |
| 5 | Vcell | This input connects to the positive terminal of the cell for voltage monitoring and provides operating bias for the integrated circuit. |
| 6 | Gnd | This is the ground pin of the IC. |
Absolute maximum ratings
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Supply Voltage (Pin 5 to Pin 6) | VDD | –0.3 to 12 | V |
| Power Dissipation | PD | 150 | mW |
| Operating Junction Temperature | TJ | –40 to 85 | °C |
| Storage Temperature | Tstg | –55 to 125 | °C |
MC33349N-4R1 applications
- Automotive Electronics
- Power Management
- Motor Control
- Industrial Automation
Comments 0
Leave a comment