MC33349N-4 Datasheet PDF – Lithium Battery Protection IC

Part Number : MC33349N-4

Function : Lithium Battery Protection Circuit for One Cell Battery Pack

Package : SOT-23 Type

Manufacturers : Motorola ( Freescale )

Pinouts :

MC33349N-4 datasheet

Description :

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, charge and discharge current limit detection, and a virtually zero current sleepmode state when the cell is discharged. This protection circuit requires a minimum number of external components and is targeted for inclusion within the battery pack. This MC33349 is available in the SOT–23 6 lead surface mount package.


1. Internally Trimmed Charge and Discharge Voltage Limits
2. Charge and Discharge Current Limit Detection
3. Virtually Zero Current Sleepmode State when Cells are Discharged
4. Dedicated for One Cell Applications
5. Minimum Components for Inclusion within the Battery Pack
6. Available in a Low Profile Surface Mount Package

Other data sheets within the file : MC33349N, MC33349N-1, MC33349N-10, MC33349N-2, MC33349N-3

MC33349N-4 Datasheet PDF Download

MC33349N-4 pdf

TA7317P Datasheet PDF – Protection Circuit – Toshiba

Part Number : TA7317P


Package : SIP 9PIN

Manufacturers : Toshiba

Image :

TA7317P datasheet


Description :

1. Over current detecting circuit
– Operation at the time of over load, such as a speaker terminal short.

2. DC voltage detecting circuit
– Operation at the time when positive or negative DC voltage (+- 1.1V of detection level) has generated at output terminals.

3. Muting circuit
– Transient noise protection when power is ON-OFF.

4. Relay driver circuit (Drive current of 130mA at Max.)

5. Operation by dual power supply.


Maximum Ratings ( Ta = 25’C)

1. Supply voltage : Vcc = 60 V

2. Relay driver output current : Iout = 130 mA

3. Power dissipation : Pd = 500 mW


TA7317P pinout

Equivalent Circuit


TA7317P Datasheet PDF Download


TA7317P pdf

Other data sheets within the file : TA7317