Datasheet

MAX5976B Evaluation Kit
Evaluates: MAX5976A/MAX5976B
_______________________________________________________________________________________ 3
Table 3. JU1 Jumper Selection (CB)
*Default position.
Table 4. JU2 Jumper Selection (ON1)
*Default position.
Table 5. SW1 Switch Positions (ON1)
*Default position.
SHUNT POSITION CB PIN CONNECTED TO CURRENT LIMIT
1-2* R8 7A
2-3 R9
Not installed Not connected Not allowed
LIMIT
0.175
I R9
1000
A
= ×
Ω
 
 
 
SWITCH POSITION ON1 PIN CONNECTED TO EV KIT FUNCTION
1-2*
VIN (through resistor R1 and jumper JU2).
Note: Install a shunt on jumper JU2.
Enabled:
•VIN> V
UVLO
• ON2 asserted low
•PRESDET asserted low
External voltage signal is connected to the ON1
PCB pad.
Note: Remove the shunt on jumper JU2.
Enabled:
•V
ON1
> 1.21V
•VIN> V
UVLO
• ON2 asserted low
• PRESDET asserted low
Disabled:
•V
ON1
< 1.21V
2-3 GND Disabled
SHUNT POSITION ON1 PIN CONNECTED TO UNDERVOLTAGE-LOCKOUT THRESHOLD
Installed*
VIN (through jumper JU2 and resistor-dividers
R1 and R10).
Note: Set SW1 to pins 1-2 before installing a
shunt on JU2.
V
UVLO
= 2.5V
where:
R10 = open*
where:
R1 = 100kI
R10 = 7.5kI to 86.6kI
Not installed
External voltage signal is connected to the ON1
PCB pad.
Note: Set SW1 to pins 1-2 and remove the
shunt on JU2 before connecting an external
voltage signal to the ON1 PCB pad.
Enabled:
•V
ON1
> 1.21V
•VIN> V
UVLO
• ON2 asserted low
• PRESDET asserted low
Disabled:
•V
ON1
< 1.21V
UVLO
R1
V 1 1.21V
R10
 
= + ×
 
 