1
dc1819afa
DEMO MANUAL DC1819A
PARAMETER
CONDITIONS
VALUE
Minimum Input Voltage
VINx
1.7V
Maximum Input Voltage
VINx
5.5V
Maximum Output Current
CLIMx Resistor-Adjustable
4A
CLIMx Internal Limit
6A
CLIMx Clamp Voltage
Current Limit
0.5V
Forward Voltage Drop
VINx = 3.6V, IOUTx = 1A
50mV Typ
Reverse Turn-Off Voltage
VINx – VOUTx
–30mV
Enable Threshold
EN1 and
EN2
800mV
DESCRIPTION
LTC4415EMSE
Dual 4A Ideal Diodes with
Adjustable Current Limit
Demonstration circuit 1819A features the LTC
®
4415EMSE
dual ideal diodes. Each independent ideal diode can be
used to replace a standard diode for improved low forward
drop in applications requiring maximum headroom and
overall system efficiency.
The input supply voltage ranges are from 1.7V to 5.5V for
each input/output pair. As initially configured, LTC4415 can
provide a maximum current limit of 4A for each diode,
but is jumper-selectable up to 6A (internal current limit).
The voltage of the current limit pins, CLIM1 and CLIM2,
can also be monitored for a scaled representation of the
output current.
For evaluation, each diode can be controlled by the EN-
ABLE CONTROL jumper, JP1, or by the enable input pins,
L
, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
EN1 and
EN2
. As initially configured, by setting to BOTH
the user can apply input voltages and loads on each diode
independently. Selecting PRIORITY allows the LTC4415 to
automatically switch over between inputs when the proper
input voltage threshold on IN1 is achieved.
Status and warning LEDs and test points are provided for
the logic output pins
STAT1
,
STAT2
and
WARN1
,
WARN2
,
respectively.
Optionally, the LTC4415EDHC version can also be used
for evaluation. It is a pin-compatible drop-in replacement.
Design files for this circuit board are available at
http://www.linear.com/demo
(T
A
= 25°C)
