MAX5970EVKIT+ Maxim Integrated, MAX5970EVKIT+ Datasheet - Page 11

• Manufacturer Part Number: MAX5970EVKIT+
• Description: Power Management IC Development Tools MAX5970 Eval Kit
• Manufacturer: Maxim Integrated
• Series: MAX5970r

Specifications of MAX5970EVKIT+

• Rohs: yes

The MAX5970 EV kit circuit demonstrates the MAX5970
dual-channel hot-swap controller that continually moni-
tors the output current and voltage with an internal 10-bit
ADC. The MAX5970 controls each channel’s n-channel
MOSFET, while monitoring the respective current across
the sense resistor and the output voltage. The EV kit
requires 3V (2.7V + Schottky diode drop) to 16V DC for
normal operation. Each hot-swap channel is configured
to operate with an input voltage as low as 0V.
During a startup cycle, the EV kit’s two channels are
off until the MAX5970’s IN pin voltage exceeds 2.7V
(typ). Once the MAX5970 powers up, it loads the initial
operational settings to the internal registers. If any of the
input channel’s voltage is above the 0.6V undervoltage
threshold, the respective MOSFET is turned on and the
MAX5970 controller monitors the corresponding channel
output current and voltage.
The EV kit features several jumpers to program the ini-
tial operational settings. These settings are maximum
current-sense range for each channel, fault-protection
behavior, power-good output-signal polarity, hardware
enable, fault-management mode, and I²C address for
the controller.
Table 3. Shunt Setting for SMBus/I²C Address
*Default position.
Detailed Description of Hardware
Open
Open
Open
JU3
(A1)
1-2*
SHUNT POSITION
1-2
1-2
2-3
2-3
2-3
Open
Open
Open
______________________________________________________________________________________
(A0)
JU2
1-2*
1-2
2-3
2-3
1-2
2-3
B7
0
0
0
0
0
0
0
0
0
B6
1
1
1
1
1
1
1
1
1
B5
1
1
1
1
1
1
1
1
1
B4
0
0
0
0
0
0
1
1
1
B3
0
0
0
1
1
1
0
0
0
MAX5970 Evaluation Kit
The EV kit requires a 3.3V (2.7V + Schottky diode drop)
to 16V input DC source for normal EV kit operation. The
EV kit circuit features jumper JU1 that allows the user
to select one of three methods to provide power to the
MAX5970 IC (U1). If the shunt is connected across pins
1-2 on jumper JU1, the highest voltage source connect-
ed to the VS1, VS2, or VIN inputs supplies power to the
IC. If the shunt is connected across pins 2-3, the highest
voltage between the 3.3V source (derived from the USB
5V supply) and the VIN input supplies power to the IC.
If the shunt is removed, the VIN input supplies power to
U1. Connect a 3.3V to 16V power source across the VIN
and GND pads when using this option. See Table 1 for
jumper JU1 configuration.
The MAX5970’s slave I²C address is configured through
the A0 and A1 pins. The EV kit features jumpers JU2 and
JU3 to configure these pins. The default address is 0110
101 (R/W). See Table 3 for a complete list of addresses.
Verify that the new I²C address matches the address
shown in the software’s Device Address combo box.
B2
0
0
1
0
0
1
1
0
1
B1
0
1
0
0
1
0
1
1
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
B0
ADDRESS
WRITE
Input Power Sources
(hex)
0x6C
0x60
0x6A
0x62
0x64
0x68
0x70
0x72
0x74
Address Selection
ADDRESS
READ
(hex)
0x6B
0x6D
0x61
0x63
0x65
0x69
0x71
0x73
0x75
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