MAX5945EVSYS Maxim Integrated, MAX5945EVSYS Datasheet - Page 9

• Manufacturer Part Number: MAX5945EVSYS
• Description: Power Management IC Development Tools Evaluation Kit/Evaluation System for the MAX5945
• Manufacturer: Maxim Integrated
• Series: MAX5945r

The MAX5945 EV kit features a jumper to set the EV
kit’s on-board 100Hz oscillator modes of operation.
Table 5 lists the selectable jumper options to configure
the 100Hz oscillator.
The MAX5945 EV kit features PC board pads and a
jumper to interface directly with a microcontroller. The
2 x 5-pin jumper JU9 has shorting connections on the
bottom layer that must be cut open to disable the opti-
cal coupler interface for nonisolated evaluation. The
jumper shorting connections must be in place for evalu-
ating an isolated stand-alone microcontroller interface.
Table 6 lists the selectable jumper options.
Table 5. Jumper JU8 Functions
*See the Bypassing AC Disconnect and the DGND-to-GND
Connection (Resistor R72) section.
Table 6. Jumper JU9 and Microcontroller PC Board Pads Function
*Default set by PC board trace.
SHUNT LOCATION
JU9 PIN NUMBER SHORT
2 and 3*
1 and 2
9 and 10 Cut Open
9 and 10 Shorted*
1 and 2 Cut Open
3 and 4 Cut Open
5 and 6 Cut Open
7 and 8 Cut Open
1 and 2 Shorted*
3 and 4 Shorted*
5 and 6 Shorted*
7 and 8 Shorted*
LOCATION
MAX5945 Evaluation Kit/Evaluation System
—
—
Stand-Alone Microcontroller Interface
_______________________________________________________________________________________
Connected to VDIG_F
Connected to GND
U4, SHDN PIN
100Hz Oscillator Shutdown
ISOLATION MODE
(Isolated/Nonisolated)
Nonisolated
Nonisolated
Nonisolated
Nonisolated
Nonisolated
Nonisolated
Isolated
Isolated
Isolated
Isolated
Isolated
Isolated
OSCILLATOR
Shutdown
Running
MODE
100Hz
VCC PC pad connects to microcontroller +3.3V power supply.
SCL_IN PC pad connects to microcontroller serial clock line.
SDA PC pad connects to microcontroller bidirectional serial data line.
SDA PC pad connects to microcontroller bidirectional serial data line.
INT_OUT PC pad connects to microcontroller interrupt pin.
OPTO_GND PC pad connects to microcontroller power-supply ground.
VDIG PC pad supplies power to the microcontroller from VDIG voltage.
SDAIN PC pad connects to microcontroller bidirectional serial data line.
SDAOUT PC pad connects to microcontroller bidirectional serial data line.
DGND PC pad connects to microcontroller power-supply ground.
SCL PC pad connects to microcontroller serial clock line.
INT PC pad connects to microcontroller interrupt pin.
MAX5945 EV KIT PC PAD TO MICROCONTROLLER CONNECTION
The MAX5945 EV kit features jumpers to facilitate cur-
rent and voltage measuring at each port’s respective
DET_, OUT_, GATE_, and SENSE_ pins on the
MAX5945 IC. Several 2 x 3-pin and 2-pin jumpers are
used to obtain the desired measurement for each port.
Jumpers JU11 and JU23 are provided for port 1,
jumpers JU12 and JU24 are provided for port 2,
jumpers JU13 and JU25 are provided for port 3, and
jumpers JU14 and JU26 are provided for port 4. The
jumper pins are shorted by a PC board trace on the
bottom layer of the EV kit by default for normal opera-
tion. The shorts can be cut open for measurements.
See Figure 3, the controller circuit schematic for a spe-
cific ports jumper.
The MAX5945 EV kit features jumpers JU15–JU18 to
bypass each port’s respective AC disconnect rectifier
diode (D1–D4), thus reducing diode power dissipation
when AC disconnect is not required. Jumpers
JU15–JU18 are used to bypass the respective port’s rec-
tifier diode. Table 7 lists the selectable jumper options for
each port.
AC Disconnect Operation (Rectifier Diodes D1–D4)
MAX5945 PORT DET_, OUT_, GATE_, and SENSE_
Pins Signal Measurements
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