MAX1773AEUP Maxim Integrated Products, MAX1773AEUP Datasheet
MAX1773AEUP
Available stocks
Related parts for MAX1773AEUP
MAX1773AEUP Summary of contents
Page 1
... Management µP to Enter Standby o 4.75V to 28V AC Adapter Input Voltage Range o Integrated LDO with 1mA Drive Capability o Small Footprint 20-Pin TSSOP Package PART MAX1773EUP MAX1773AEUP Pin Configuration appears at end of data sheet. † Covered by U.S. Patent number 5,764,032. SYSTEM LOGIC SUPPLY FROM HOST µP ...
Page 2
Power Source Selector for Dual-Battery Systems ABSOLUTE MAXIMUM RATINGS GND ............................................-0.3V to +20V BATA BATB V to GND........................................-0. COMA V to GND........................................-0. COMB GND ...
Page 3
ELECTRICAL CHARACTERISTICS (continued 16.8V 3.3µF, V BATA BATB VDD BATSEL COMA COMB DISA PARAMETER TCOMP Input Leakage Current THM_ to TCOMP Trip Threshold THM_ to TCOMP ...
Page 4
Power Source Selector for Dual-Battery Systems ELECTRICAL CHARACTERISTICS (continued 16.8V 3.3µF, V BATA BATB VDD BATSEL COMA COMB DISA PARAMETER DIS_ Turn-On Clamp Voltage ...
Page 5
ELECTRICAL CHARACTERISTICS (continued 16.8V 3.3µF, V BATA BATB VDD BATSEL COMA COMB DISA PARAMETER THM_ Input Voltage Range THM_ Input Leakage Current TCOMP Input Voltage Range ...
Page 6
Power Source Selector for Dual-Battery Systems ELECTRICAL CHARACTERISTICS (continued 16.8V 3.3µF, V BATA BATB VDD BATSEL COMA COMB DISA DIS_ Sink Current (PMOS Turn-On) ...
Page 7
A V ERROR vs. INPUT VOLTAGE DD 0. BAT_ = OPEN IN ACDET 0 -0.04 -0. 3.3V IN BAT ACDET -0. ...
Page 8
Power Source Selector for Dual-Battery Systems (T = +25°C, unless otherwise noted.) A TRANSITION FROM BATTERY A TO BATTERY B (TCOMP 4A 66µF) EXTLD EXTLD MAX1773-07 12V 11V V EXTLD THMA 10µs/div V ...
Page 9
PIN NAME 1 BATA Battery A Connection 2 THMA Thermistor A Input 3 CHGA Open-Drain Gate Driver for Charge Path MOSFET to Battery A 4 DISA Gate Driver for Discharge Path MOSFET to Battery A. Switches from V 5 COMA ...
Page 10
Power Source Selector for Dual-Battery Systems (V = COM_ turn-on clamp voltage, V COM_GS MAX1773-Fig-01 V BATA V COMA V DISA V COMB V DISB BATTERY ACTION DELAY BATTERY SWITCHOVER V < V THMA TCOMP DELAY V < V THMB ...
Page 11
COM_ turn-on clamp voltage, V COM_GS MAX1773-Fig-05 V ACDET V _ DIS AC TO BATTERY SWITCHOVER DELAY ✕ > BAT MINV V _ < V THM TCOMP Figure Battery Switchover Delay ...
Page 12
Power Source Selector for Dual-Battery Systems Table 1. AC Adapter States BATSEL BATTERY A BATTERY B 0 Present X 0 Absent Present 1 X Absent X = Don’t care, Present: V < V THM_ TCOMP, Table 2. ...
Page 13
V BATA+ COMA Figure 9. 7-MOSFET Topology Table 3. Startup States V BATA V BATB >5 × MINV <5 × V >5 × V MINV MINV >5 × MINV X X <5 × V <5 × ...
Page 14
Power Source Selector for Dual-Battery Systems TO HOST µP 3.3kΩ AC ADAPTER INPUT 100kΩ 0.1µF P7 BATTERY A STEP-DOWN CHARGER OUTPUT INPUT Figure 10. Standard Application Circuit Discharged Battery Latch is set, the state table is sus- pended, the MAX1773/MAX1773A ...
Page 15
BATA BATB EXTLD ACDET + _ GND MINV THMA _ TCOMP _ THMB + BATSEL Figure 11. Functional Diagram States mode and enters either the Standard Battery States mode or the AC Adapter States mode. Status and ...
Page 16
Power Source Selector for Dual-Battery Systems Table 4. Status Bits MODE All V DD Startup States Standard Battery States Selected Battery Discharge Path Connected Standard Battery States Other Battery Discharge Path Connected AC Adapter States Selected Battery Charge Path Connected ...
Page 17
V ACDET 3.3V 20V V EXTLD 8V 12. BATA 12. BATB BATSEL 0 0 BATSTAT ACPRES Figure 12. Charge/Discharge Example In applications where the battery voltage always ...
Page 18
Power Source Selector for Dual-Battery Systems Table 5. Recommended Manufacturers SUPPLIER PHONE Fairchild 408-822-2000 IR 310-322-3331 Siliconix 408-988-8000 charge path is not connected. If the external controller polled the MAX1773/MAX1773A as described in Status and Configuration, then BATSTAT would return ...
Page 19
Differences Between MAX1773 This section discusses the differences between the MAX1773 and MAX1773A for the situations detailed. Note that the MAX1773 and MAX1773A are pin-to-pin compatible. MAX1773: If battery B is selected but absent, and bat- tery A is inserted ...
Page 20
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...