BQ24721 Datasheet PDF – Battery Pack Charger

Part Number : BQ24721

Function : High efficiency synchronous battery pack charger

Package : 32-Pin 5×5-mm QFN Type

Manufacturers : Texas Instruments

Image :
BQ24721 datasheet

Description :

The BQ24721 is a high efficiency synchronous battery pack charger with high level of integration for portable applications. This device implements a high performance analog front-end that interfaces to the system power management micro-controller through a simplified SBS-like SMBus interface.



Features :

1. Integrated 5% 5-V LDO When AC Adapter Applied

2. 6-V Drive Supply Voltage for Increased Efficiency

3. Reverse Battery to Adapter Discharge Protection

4. Battery/Adapter to System Power Selector Function

5. Charge and Adapter Overcurrent Protection

6. Battery Thermistor Sense, TS, Comparators

Typical Application


1. Portable Notebook Computers
2. Portable DVD Players
3. Webpads, PC Tablets

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Other data sheets within the file : BQ24721C, BQ24721CRHBR, BQ24721CRHBT, BQ24721RHBR

BQ24721 Datasheet PDF Download

BQ24721 pdf


CD4541B Datasheet PDF – CMOS Programmable Timer

Part Number : CD4541B

Function : CMOS Programmable Timer, High Voltage Types (20V Rating)

Package : DIP, SOIC, TSSOP 14 Pin Type

Manufacturers : Texas Instruments

Image and Pinouts :
CD4541B datasheet

Description :

The CD4541B programmable timer consists of a 16-stage binary counter, an oscillator that is controlled by external R-C components (2 resistors and a capacitor), an automatic power-on reset circuit, and output control logic. The counter increments on positive-edge clock transitions and can also be reset via the MASTER RESET input.

Function Diagram


1. Low Symmetrical Output Resistance, Typically 100Ω at VDD = 15V
2. Built-In Low-Power RC Oscillator
3. Oscillator Frequency Range : DC to 100kHz
4. External Clock (Applied to Pin 3) can be Used Instead of Oscillator
5. Operates as 2N Frequency Divider or as a Single-Transition Timer
6. Q/Q Select Provides Output Logic Level Flexibility
7. AUTO or MASTER RESET Disables Oscillator During Reset to Reduce Power Dissipation
8. Operates With Very Slow Clock Rise and Fall Times

Other data sheets within the file : CD4541BE, CD4541BEE4, CD4541BF, CD4541BF3A

CD4541B Datasheet PDF Download

CD4541B pdf