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BQ77PL900 Datasheet(PDF) 7 Page - Texas Instruments |
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BQ77PL900 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 57 page 4 SAFETY STATE OVERVIEW UVLO Mode Shutdown Mode Power Supply to PACK Internal V REG2 > 2.4 V Internal V REG2 < 2.3 V Power Supply to PACK NoPowerSupply CHG: OFF DSG: OFF VREG1: OFF VREG2: OFF XRST:LOW I C: Disabled UVProtection:Disabled OV Protection: Disabled Current Protection: Disabled Thermal Protection: Disabled 2 CHG: OFF DSG: OFF VREG1: OFF VREG2: OFF XRST:LOW I C: Disabled Current Protection: Disabled VCELL: Disabled Watchdog: Disabled Thermal Protection: Disabled 2 NoSupplytoPACK AttachaCharger CHG: OFF DSG: OFF VREG1: ON VREG2: ON XRST:HIGH I C:Enabled UVProtection:Enabled OV Protection: Enabled Current Protection: Disabled Thermal Protection: Enabled 2 CHG: ON DSG: OFF VREG1: ON VREG2: ON XRST:HIGH I C:Enabled UVProtection:Disabled OV Protection: Enabled Current Protection:Enabled Thermal Protection: Enabled 2 CHG: ON DSG: ON VREG1: ON VREG2: ON XRST:HIGH I C:Enabled UVProtection:Enabled OV Protection: Enabled Current Protection:Enabled Thermal Protection: Enabled 2 CurrentProtection Mode DischargeSide CHG: OFF DSG: OFF VREG1: ON VREG2: ON XRST:HIGH I C:Enabled UVProtection:Enabled OV Protection: Enabled Current Protection:Enabled Thermal Protection: Disabled 2 Overtemperature Protection Mode CHG: OFF DSG: ON VREG1: ON VREG2: ON XRST:HIGH I C:Enabled UVProtection:Enabled OV Protection: Disabled Current Protection:Enabled Thermal Protection: Enabled 2 Overvoltage Protection Mode Undervoltage Protection Mode Normal Mode V >V orV fora periodoft ort SR OC SC OC SC V <V cell UV V >V cell OV AllCell Voltage> V + V or (V – V >0.4Vand All CellVoltage> V ) UV UV pack bat UV AllCell Voltage< V – V OV OV V <0.975V IN V > 1.075V IN B0326-01 bq77PL900 www.ti.com ...................................................................................................................................................................................................... SLUS844 – JUNE 2008 Figure 3. Stand-Alone Mode Table 1. Stand-Alone STATUS Bit, XALERT and FET Transition Summary MODE TRANSITION STATUS BIT XALERT FET ACTIVITY Normal to current protection SCD or OCD = H to L DSG and CHG off 1 Current protection to normal SCD or OCD = L to H DSG and CHG on 0 Normal to overvoltage protection OVP = 1 H to L CHG off Overvoltage protection to normal OVP = 0 L to H CHG on Normal to undervoltage protection (when VPACK goes down to 0 V, move to UVP = 1 H to L DSG off shutdown mode) Undervoltage protection to normal UVP = 0 L to H DSG on Normal to overtemperature OVT = 1 H to L DSG and CHG off Overtemperature to normal OVT = 0 L to H DSG and CHG on Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): bq77PL900 |
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