PI2123 Datasheet, PDF (2/20 Pages) Vicor Corporation – 15 Volt, 15 Amp Full-Function Active ORing Solution

Pin Description
Pin
Name
D
Pin
Number
1, 15, 16,
17
S 2, 3, 4, 5
SP
6
FT
7
BK
8
SL
9
VC
10
GND
11
OV
12
UV
13
SN
14
Description
Drain- The Drain of the internal N-channel MOSFET, connect to the output load.
Source-The source of the internal N-channel MOSFET, connect to the input power source
bus voltage.
Positive Sense Input & Clamp: Connect SP pin to the S pin. The polarity of the voltage
difference between SP and SN provides an indication of current flow direction through the
MOSFET.
Fault State Output: This open collector pin pulls low when a fault occurs. Fault logic inputs
are VC Under-Voltage, Input Under-Voltage, Input Over-Voltage, Forward Over-Current,
light load, reverse current, and Over-Temperature. Leave this pin open if unused.
Blanking timer Input-Output: Connect a resistor from BK to GND to set the blanking time
for the Reverse Comparator function. To configure in slave mode, connect BK to VC. To
configure in master mode with the fastest turn-off response connect BK directly to GND.
Slave Input-Output: This pin is used for paralleling multiple PI2123 solutions in high power
applications. When configured as the Master, this pin functions as an output capable of
driving up to 10 SL pins of slaved PI2123 devices. It serves as an input when the PI2123 is
configured in slave mode.
Input Supply Pin: This pin is the supply pin for the control circuitry and gate driver.
Connect a 1μF capacitor between VC pin and the GND pin. Voltage on this pin is limited to
15.5V by an internal shunt regulator in high auxiliary voltage applications. For high voltage
auxiliary supply applications connect a shunt resistor between VC and the auxiliary supply.
Ground: This pin is ground for the gate driver and control circuitry.
Input Over Voltage Input: The OV pin is used to detect an input source over-voltage
condition in ground referenced applications. When the OV pin voltage crosses the OV
threshold, the FT pin pulls low indicating a fault condition. The input voltage OV threshold
is programmable through an external resistor divider. Connect OV to GND to disable this
function.
Input Under-Voltage Input: The UV pin is used to detect an input source under-voltage
condition in ground referenced applications. When the UV pin voltage drops below the UV
threshold, the FT pin pulls low indicating a fault condition. The input voltage UV threshold
is programmable through an external resistor divider. Connect UV to VC to disable this
function.
Negative Sense Input & Clamp- Connect SN to D pin. The polarity of the voltage
difference between SP and SN provides an indication of current flow direction through the
MOSFET.
Package Pin-out
17 Pin LGA (5mm x 7mm)
Top view
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PI2123
Rev 1.0 Page 2 of 20