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MAX16050 Evaluation Kit
Configuring the MAX16050 EV Kit for
Daisy-Chain Operation (SW1)
The MAX16050 EV kit can be configured for daisy-
chain operation of the MAX16050 (U1) and the
MAX16051 (U2) by configuring DIP switch SW1 and
various jumpers. See Tables 12 and 13 for switch SW1
and the proper jumper configurations, respectively, to
configure the EV kit for daisy-chain operation. For prop-
er daisy-chain operation of U1 and U2, all of SW1
switches should be set to the on position.
To initiate a power-up sequence, install a shunt across
pins 1-2 of jumper JU2 (U1_EN). U1_IN1 –U1_IN4
sequence according to the shunt configurations of
jumpers JU4, JU5, and JU6 (Table 6). Upon U1_ inputs
rising above their respective thresholds, the U1_ RESET
signal goes high and drives U2_EN input high (SW1-4)
allowing sequencing to commence on the MAX16051.
Upon U2 controller sequencing successfully,
U2_ RESET goes high.
Table 12. SW1 Switch Functions
To initiate a reverse power-down sequence, install a
shunt across jumper JU8 or JU13. When all the IN_ volt-
ages monitored by U2 (U2_IN1–U2_IN5) have dropped
below their undervoltage threshold, U2_REM output
goes high, thereby allowing U1_OUT_ to commence
sequencing down. U2_REM connects to
U1_ EN_HOLD (through SW1-2) to force U1 controller
to stay on even if U1_EN and U1_ SHDN are pulled low
during a daisy-chain operation.
Switch SW1-3 connects U1 and U2 open-drain FAULT
outputs together, resulting in a fast power-down of all
inputs when a fault condition occurs on any of the
inputs or when FAULT is manually pulled low by
installing a shunt across jumpers JU9 or JU14.
SW1
DESIGNATION
SHDN
REV_SEQ
FAULT
SEQ
SWITCH
POSITION
On
On
On
On
EV KIT OPERATION
U1 and U2 SHDN inputs connected and controlled by one signal.
Connects U2_REM to U1_ EN_HOLD . Reverse-sequence U2_OUT and then U1_OUT when a
shunt is installed across jumper JU8 or JU13.
Connects UI_ FAULT and U2_ FAULT . All outputs power down simultaneously during fault
conditions.
Connects U1_ RESET to U2_EN. Sequences U1 OUT_ and then U2 OUT_.
Table 13. Jumper Configuration for Daisy-Chain Operation
JUMPER
JU2
JU7
JU8, JU13
JU9, JU14
JU11
JU15
SHUNT
POSITION
1-2
Not installed
Not installed
Not installed
Not installed
1-2
EV KIT OPERATION
U1 controllers enabled at U1_VCC = 3.3V (DC-DC mode)
U1_ EN_HOLD controlled by U2_REM
U1_ SHDN and U2_ SHDN = high
U1_ FAULT and U2_ FAULT connected together
U2_EN controlled by switch SW1-4
U2_ EN_HOLD = high
8
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