MAX1773EVKIT 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
比赛名单
MAX1773EVKIT Datasheet PDF : 10 Pages
| |||
MAX1773 Evaluation Kit
Table 8. Jumper JU8 Functions
SHORT
LOCATION
1 and 2
(PC trace
shorted)
None
(PC trace short
cut open)
VCC PIN
Connected to
+3.3V
None
CMOS SWITCH
DEBOUNCERS
CMOS switch
debouncer IC (U6)
powered up
CMOS switch
debouncer IC (U6)
powered down
Table 9. Jumper JU9 Functions
SHORT
LOCATION
1 and 2
(PC trace shorted)
None
(PC trace short
cut open)
OUT PIN
Connected to
BATT_SEL
input
None
CMOS SWITCH
DEBOUNCERS
CMOS switch
debouncer output
CMOS switch
debouncer IC (U6)
output floating
The switch’s center position allows an external con-
troller to select which battery is desired by pulling the
BATT_SEL pad high or low. Table 10 lists switch SW1
options.
Caution: Do not connect an external controller to
the BATT_SEL pad while switch SW1 is in position 1
or 3 since the external controller may be damaged.
SMBus Interface
The MAX1773 EV kit features an SMBus signal multi-
plexer for the smart-battery packs connected to termi-
nals (TB1, TB2) and the SMBus interface signals (CLK,
DAT, T). A three-position switch (SW2) is utilized to
Table 10. Switch SW1 Functions
SWITCH
POSITION
1
2
3
MAX1773
BAT_SEL PIN
Connected to
+3.3V
None, external
controller toggles
BATT_SEL pad
Connected to GND
BATT_SEL
CONTROLS
Battery B selected
External controller
selects battery A (low)
or battery B (high,
+3.3V)
Battery A selected
select which smart-battery pack will be connected to
the SMBus interface. The switch’s center position
allows an external controller to select which battery is
desired by pulling the COMM pad logic high or low.
Table 11 below lists switch SW2 options.
Jumpers JU4 and JU5 allow CLK and DAT to be pulled
up to logic high with built-in resistors (R16, R17). See the
SMBus Pullup Resistors section for jumper selection.
Table 11. Switch SW2 Functions
SWITCH
POSITION
1
2
3
INVERTER (U5A)
INPUT PIN
Connected to
+3.3V
None, external
controller toggles
COMM pad
Connected to
GND
COMM CONTROLS
SMBus connected to
battery B
External controller
selects battery A
(low) or
battery B (high,
+3.3V)
for SMBus
SMBus connected to
battery A
Caution: Do not connect an external controller to
the COMM pad while switch SW2 is in position 1 or
3 since the external controller may be damaged.
Battery Minimum Voltage Level
Battery Minimum Voltage Level Adjustment
The MAX1773 EV kit features a potentiometer to adjust
the battery minimum voltage level. Potentiometer R6
adjusts the battery minimum voltage level from +4.65V
to +13V. The battery minimum voltage level is adjusted
by the voltage at test point TP1. The battery minimum
voltage level is equal to the voltage at TP1 multiplied by
5 (VTP1 x 5; i.e., +7.5V level = 1.5V x 5). Rotate R6
counterclockwise to decrease the battery minimum
voltage level or clockwise to increase it.
Using the MAX1772 EV Kit Charger with
the MAX1773 EV Kit
MAX1772 EV Kit Charger Connections
The MAX1773 EV kit can be used with the MAX1772 EV
kit charger. For correct connection between the two EV
kits, jumper JU4 must be cut open on the MAX1772 EV
kit. Refer to the MAX1772 EV kit data sheet for addi-
tional information on jumper JU4. Figure 2 shows how
to connect the MAX1772 EV kit to a MAX1773 EV kit,
AC adapter, two batteries, and a load.
_______________________________________________________________________________________ 5
Share Link: 