mc33351adtb ON Semiconductor, mc33351adtb Datasheet

Page 1

... Discharge Current Limit Low−Side Discharge Charge and Discharge Gate Charge and Discharge Drive Common Gate Drive Common 8 Undervoltage Fault Output 10 MC33351ADTB−1 MC33351ADTB−1R2 TSSOP−20 2500 Tape/Reel 1 2 Charge Discharge Inhibit Inhibit Input Input 1 http://onsemi.com http://onsemi.com MARKING ...

Page 2

Smart Battery Pack with Low−Side Discharge Current Sensing, Charge Interrupt Voltage Sensing, and Cell Voltage Balancing MC33351A High−Side Discharge Current Limit 16 17 Cell 3 18 Balance 3 Cell Cell ...

Page 3

Smart Battery Pack with High−Side Discharge Current Sensing MC33351A High−Side Discharge Current Limit 16 17 Cell 3 18 Balance 3 Cell Cell Balance 2 Cell 2 14 Cell 1/V ...

Page 4

MAXIMUM RATINGS Ratings Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Input Voltage (Measured with respect to Ground, Pin 13) Á Á Á Á Á Á Á Á Á ...

Page 5

ELECTRICAL CHARACTERISTICS C (Pin 4) = 1000 pF 25°C) dly A Characteristic CELL VOLTAGE BALANCING Internal Balancing MOSFET On−Resistance Balance 3, (Pin 19) Balance 1, Balance 2 (Pin 20, 14) Á Á Á Á Á Á Á Á ...

Page 6

TEMPERATURE (°C) Figure 3. Over Voltage Threshold versus Temperature 2.305 2.300 2.295 2.290 2.285 2.280 2.275 2.270 2.265 −40 − TEMPERATURE (°C) Figure 5. ...

Page 7

V ( cell Figure 9. V versus I (No Load 250 200 150 100 Figure 11. Discharge Current Limit ...

Page 8

Pin No. Function Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á 1 Charge ...

Page 9

Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á ...

Page 10

INTRODUCTION The demand for smaller lightweight portable electronic equipment has dramatically increased the requirements of battery performance. Today’s most attractive chemistries include lithium−polymer, lithium−ion, and lithium−metal. Each of these chemistries require electronic protection in order to constrain cell operation to ...

Page 11

From Cell Voltage Cell Selector Discharge Voltage Floating Threshold Over/Under Cell Voltage Charge Voltage Detector Threshold & Reference Cell Voltage To Return Cell Selector Figure 13. Cell Voltage Limit Sampling vs. Programming The cell charge and discharge voltage limits are ...

Page 12

Discharge Current Sensing Discharge current limit protection can be selectively added to the battery pack with the addition of a sense resistor R on the Low−Side or by monitoring the voltage lim(dschg) drop across the series FETs on the High−Side. ...

Page 13

MC33351A − Cell Voltage versus Undervoltage Fault 4.25 V ANY No FAULT CELL VOLTAGE 2. sec + (0 − 1 sec) High (Inactive) FAULT (pin 10) Low (Active) ON DISCHARGE FET OFF Connected CHARGER Disconnected FAULT remains active ...

Page 14

... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303− ...