1
dc2161af
DEMO MANUAL DC2161A
DESCRIPTION
LTC4231 Micropower
Hot Swap Controller
Demonstration circuit 2161A showcases the
LTC
®
4231
Micropower Hot Swap
™
Controller in a 12V, 3A applica-
tion. Included on the board are input overvoltage and
reverse voltage protection, input voltage dividers for UV
and OV detection, an output voltage LED, jumpers to
disable UV/OV, manual and remote enable control, and
quiescent current measurement. There are turrets provided
to monitor input voltage, output voltage, output status,
quiescent current, several ground connections, timer pin,
and control the ON pin. Input, output and return voltages
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of
their respective owners.
are provided on banana jacks. The DC2161A-A version is
used to demonstrate the LTC4231-1 which remains off
after a current fault, while the DC2161A-B demonstrates
the LTC4231-2 which automatically reapplies power after
a cool-down period.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2161A
Table 1
PARAMETER
CONDITIONS
VALUE
Input Supply Voltage Range
Limited by Transient Surge Protector
–
24V to +24V
Nominal Operating Voltage
12V
Overvoltage Lockout
Nominal
14.4V
Undervoltage Lockout (Voltage Falling)
Nominal
9.6V
Undervoltage Lockout (Voltage Rising)
Nominal
10.8V
Output Current Limit
3A
Maximum Load Capacitance
600µF
Timer Expiration Period
2ms
Table 2. Power Input and Output Connections
NOMENCLATURE
CONNECTOR
DESCRIPTION
VIN 12V
J1
12V Input
GND
J2
12V Input Return
VOUT 12V, 3A
J3
12V Output
GND
J4
12V Output Return
Table 3. Test Points
NOMENCLATURE
TURRET
DESCRIPTION
VIN 12V
E1
12V Input Monitor
GND
E2, E4,
E6, E8
Ground
VOUT 12V, 3A
E3
12V Output Monitor
STATUS
E5
Status, Open Drain when Output
Enabled
GND
E6
Ground
IQ
E7
Quiescent Current Monitor. Use
Microammeter at This Point When JP2
Selects MEASURE IQ.
ON
E9
Enable LTC4231 Output. Enables Output
or Selects External Control of Output
TIMER
E10
TIMER Pin
PERFORMANCE SUMMARY
Specifications are at T
A
= 25°C
