PI2061 Datasheet, PDF (2/16 Pages) Vicor Corporation – High Side High Voltage Load Disconnect Switch Controller IC

Not Recommended for New Designs
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Pin Description
Pin Name
Pin
Number
Description
PGND
Gate Driver Switch Return: This pin is the high current return path for the gate driver turn off switch.
1
Connect this pin to the low side of VC bypass capacitor and SGND.
GATE
Gate Drive Output: This pin drives the gate of the external N-channel MOSFET. Under normal
operating conditions, the GATE pin pulls high to approximately 2*VC with respect to SGND pin. The
2
controller turns the GATE off during an over-current fault that is above the overcurrent voltage
threshold (166mV during power up and 70mV in steady state).
Controller Input Supply: This pin is the supply pin for the control circuitry and gate driver. Connect
a 0.1μF capacitor between the VC pin and the SGND pin. Voltage on this pin is regulated to 11.7V
VC
3
with respect to SGND by an internal shunt regulator. Connect a bias resistor (R_VC) between the VC
pin and the supply input as shown in Figure 1.
SGND
EN
VC Return: This pin is the return (ground) for the control circuitry. Connect this pin to the low side of
4
the VC bypass capacitor and high side of the R_PG resistor as shown in Figure 1.
Enable: Pull this pin low with 8µA or more to disable the gate driver and reset the latch. Tie this pin
5
to VC if the Enable/disable feature is not used.
Positive Sense Input & Clamp: Connect SP pin to the positive side of the sense resistor. The
SP
6
magnitude of the voltage difference between SP and SN provides an indication of the current
through the sense resistor.
Negative Sense Input & Clamp: Connect SN pin to the negative side of the sense resistor. The
SN
7
magnitude of the voltage difference between SP and SN provides an indication of the load current
through the sense resistor.
NC
8, 10 No Connect: Leave pins unconnected
Fault Status Output: This open collector pin transitions to high resistance to indicate a fault. When
FT
9
the controller input voltage is in under voltage, VC - SGND < 7V this pin is high resistance as well.
When the part is in a normal operating condition and gate driver is enabled this pin is low resistance.
Package Pin-Outs
PGND 1
GATE 2
VC 3
SGND 4
EN 5
10 NC
9 FT
8 NC
7 SN
6 SP
10 Lead DFN (3mm x 3mm)
Top view
Picor Corporation • picorpower.com
PI2061
Rev 1.4
Page 2 of 16