MAX4211EEVKIT Maxim Integrated, MAX4211EEVKIT Datasheet - Page 3

• Manufacturer Part Number: MAX4211EEVKIT
• Description: Current & Power Monitors & Regulators Evaluation Kit for the MAX4211A/B/C/D/E/F
• Manufacturer: Maxim Integrated

Specifications of MAX4211EEVKIT

• Product: Power Monitors
• Supply Voltage - Max: 20 V
• Supply Voltage - Min: 5 V
• Operating Temperature Range: - 40 C to + 85 C
• Input Voltage Range: 5 V to 20 V
• Supply Current: 1100 uA

The load can be supplied through an independent sup-
ply source connected across the VSOURCE and GND
pads and can range from 5V to 20V. The MAX4211E
controls an external high-side p-channel power MOSFET
switch that disconnects the supply source from the load
under overpower fault conditions.
During normal operation, the EV kit circuit continually
monitors the power delivered to the load. When the power
delivered to the load exceeds the configured maximum
power threshold, the circuit disconnects the supply
source from the load thus providing overpower fault pro-
tection. The EV kit can be reset to normal operation by
first removing the fault condition and then momentarily
pressing pushbutton SW1. The EV kit is configured for a
power threshold of 100W with an input source voltage
threshold of 20V and load-current threshold of 5A. The
MAX4211E EV kit can be reconfigured to monitor up to
10A of current.
The MAX4211E EV kit provides the flexibility of having
independent power-supply sources for the IC and the
load. The EV kit is configured for a maximum V
of 20V and a V
V
Overpower Threshold section. Set the V
the range of 2.7V to 5.5V.
The overpower threshold for the MAX4211E EV kit is set
to 100W with a maximum V
and maximum load current of 5A. During normal opera-
tion, the EV kit circuit continually monitors the power
delivered to the load. When the power delivered to the
load exceeds the 100W threshold (after exceeding the
20V and 5A thresholds), the MAX4211E disconnects
the supply source from the load. This is done by
switching MOSFET P1 off when the MAX4211E COUT1
pin latches high.
Table 1. Jumpers JU1/JU2/JU3 Functions
SHUNT LOCATION
SOURCE
ON JU1
2 and 3
1 and 2
maximum input voltage for up to 28V, see the
CC
_______________________________________________________________________________________
of 5V. To reconfigure the EV kit’s
SHUNT LOCATION
Not installed
Installed
ON JU2
SOURCE
Overpower Threshold
input voltage of 20V
Input Voltages
SHUNT LOCATION
CC
voltage in
Installed
Installed
ON JU3
SOURCE
MAX4211E Evaluation Kit
CIN2- connected to GND and
COUT1 connected to SW1.
CIN2- pad connected to the
microcontroller output, and COUT2
connected to COUT1 and LE.
To reconfigure the MAX4211E EV kit for a different
overpower threshold, the V
thresholds must be modified. Reconfigure the V
voltage threshold for up to 28V by selecting new resis-
tor values for R2 and R3 using the following equation:
where resistor R3 is typically 6.98kΩ and the
V
ensures that the MAX4211E POUT pin is 2.5V when the
maximum power is delivered to the load.
The MAX4211E EV kit board is configured for a load-
current threshold of 5A DC, however, the 2oz PC board
traces can handle up to 10A. Use the following equa-
tion to select a new value for current-sense resistor R1
(2512 case):
Verify that the resistor R1 and MOSFET P1 are rated for
the new current level.
During an overpower fault condition, the MAX4211E EV
kit circuit latches off. To reset the circuit, remove the
fault condition and momentarily press the pushbutton
switch SW1. This clears the latched COUT1 pin on the
MAX4211E.
The MAX4211E EV kit circuit reset function can also be
controlled by connecting a microcontroller’s output
across the CIN2- and GND pads and configuring
jumpers JU1, JU2, and JU3. See Table 1 for jumper
configuration.
SOURCE_THRESHOLD
PIN CONNECTIONS
R
R2 = R3 x (V
1
=
LOAD CURRENT THRESHOLD
_
SOURCE_THRESHOLD
is the new desired value. This step
0 100
.
SOURCE
_
V
Manual reset. Press SW1.
Microcontroller reset.
Active high.
EV KIT FUNCTION
and load-current
- 1)
SOURCE
Reset
3