MAX1773 データシートの表示（PDF） - Maxim Integrated
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MAX1773 Datasheet PDF : 20 Pages
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Power Source Selector for
Dual-Battery Systems
Transition Time Diagrams
(VCOM_GS = COM_ turn-on clamp voltage, VDIS_GS = DIS_ turn-on clamp voltage, VCHARGER = system step-down charger output.)
MAX1773-Fig-01
VBATA
5 ✕ VMINV
VCOMA
VDISA
VBATA
VBATA + VCOM_GS
VEXTLD
VEXTLD + VDIS_GS
VCOMB
VDISB
3V VBATB
VBATB + VCOM_GS
3V VEXTLD
VEXTLD + VDIS_GS
BATTERY ACTION
DELAY
VTHMA < VTCOMP
VTHMB < VTCOMP
BATTERY SWITCHOVER
DELAY
Figure 1. Battery Delay (Battery A to Battery B)
MAX1773-Fig-02
VBATB
5 ✕ VMINV
VCOMB
VDISB
VCOMA
VDISA
VBATB
VBATB + VCOM_GS
VEXTLD
VEXTLD + VDIS_GS
3V VBATA
VBATA + VCOM_GS
3V VEXTLD
VEXTLD + VDIS_GS
BATTERY ACTION
DELAY
VTHMA < VTCOMP
VTHMB < VTCOMP
BATTERY SWITCHOVER
DELAY
Figure 2. Battery Delay (Battery B to Battery A)
VTHMA
VCOMA
VDISA
VCOMB
VDISB
VTHMB < VTCOMP
MAX1773-Fig-03
VTCOMP
VBATA
VBATA + VCOM_GS
VEXTLD
VEXTLD + VDIS_GS
3V VBATB
VBATB + VCOM_GS
3V VEXTLD
VEXTLD + VDIS_GS
THERMISTOR ACTION DELAY
BATTERY SWITCHOVER DELAY
VTHMB
VCOMB
VDISB
VCOMA
VDISA
VTHMA < VTCOMP
MAX1773-Fig-04
VTCOMP
VBATB
VBATB + VCOM_GS
VEXTLD
VEXTLD + VDIS_GS
3V VBATA
VBATA + VCOM_GS
3V VEXTLD
VEXTLD + VDIS_GS
THERMISTOR ACTION DELAY
BATTERY SWITCHOVER DELAY
Figure 3. Thermistor Switchover Delay (Battery A to Battery B)
Figure 4. Thermistor Switchover Delay (Battery B to Battery A)
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