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Part Number: Si9730
Description: The Si9730 monitors the charging and discharging of dual-cell lithium-ion battery packs (carbon or coke chemistry) e...
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Si9730
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DataSheet
General Description
Si9730 General Description
The Si9730 monitors the charging and discharging of dual-cell lithium-ion battery packs (carbon or coke chemistry) ensuring that battery capacity is fully utilized while ensuring safe operation. The Si9730 provides protection against
overcharge, over-discharge, and short circuit conditions which are hazardous to the battery and the environment.
Battery voltages of each individual cell are monitored at the center-tap connection by an internal A/D converter through the VC pin. If one or both of the cells is determined to be overcharged, an internal cell balancing network "bleeds" off current at 15 A until both cells are charged to the same maximum level. Depending on the condition of each cell, the Si9730 will switch two external source-connected n-channel MOSFETs on or off to allow the cells to be charged or to provide current to the load.
he Si9730 is available in an 8-pin SOIC package with an operating temperature range of −25 to 85°C. The Si9730 is
available in both standard and lead (Pb)-free packages.
Si9730 Maximum Ratings
VM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . VDD 15 V to VDD +15 V
VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . VSS 0.3 V to VSS +12 V
VC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS 0.3 V to VDD +0.3 V
IS (VSS w VM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . VM 0.3 V to VDD +0.3 V
(VM w VSS ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS 0.3 V to VDD +0.3 V
Maximum Operating Junction Temperature . . . . .. . . . . . . . . .. . . . . . . . . . . . . 125
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 200 mW
Thermal Impedance (PQJA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 80/W
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to 150
Si9730 Features
Over-Charge Protection
Over-Discharge Protection
Short Circuit Current Limiting
Battery Open-Circuit Center Tap Protection
Cell Voltage Balancing
Undervoltage Lockout
Individual Cell Voltage Monitoring
Low Operating Current (30 A) and Shutdown Current (1 A)
Internal N-Channel MOSFET Driver
High Noise Immunity
Accurate (1.19%) Over-Charge Voltage Detection
Four Different Cell Types Covered
Over-Discharge Protection
Short Circuit Current Limiting
Battery Open-Circuit Center Tap Protection
Cell Voltage Balancing
Undervoltage Lockout
Individual Cell Voltage Monitoring
Low Operating Current (30 A) and Shutdown Current (1 A)
Internal N-Channel MOSFET Driver
High Noise Immunity
Accurate (1.19%) Over-Charge Voltage Detection
Four Different Cell Types Covered
SI9730
PDF/DataSheet Download
- Datasheet: SI9730
- File Size: 119120 KB
- Manufacturer: VISAY [Vishay Siliconix]
- Click here to Download
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