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PI2061 Datasheet

High Side High Voltage Load Disconnect Switch Controller IC

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Not Recommended for New Designs
PI2061
Cool-Switch® Series
High Side High Voltage Load Disconnect Switch Controller IC
Description
The PI2061 is a high-speed electronic circuit breaker
controller IC designed for use with N-channel MOSFETs in
high side load disconnect switch solutions for medium
voltage applications. The PI2061 Cool-Switch® controller
enables an extremely low power loss solution with fast
dynamic response to an over current fault or EN Low
conditions.
Once enabled, the PI2061 monitors the MOSFET current
through a sense resistor. If an over current level is
sensed, the switch is quickly latched off to prevent the
power source from being overloaded. Bringing the EN
pin low will reset the over current latch allowing retry. To
avoid false tripping by the in-rush current, the over
current level is approximately doubled during start up,
until SN approaches about 0.8V below VC. The PI2061
has an internal charge pump to drive the gate of a high
side N-Channel MOSFET above the VC input. There is an
internal shunt regulator that regulates the VC input with
respect to the SGND pin for applications higher than 11
volts.
Table of Contents:
Pin Description
Electrical Specifications
Functional Description
Block Diagram
State Diagram
Typical Characteristics Plots
2
3
5
6
7
8
Features
Programmable latching over-current detection
Fast 120ns disconnect response to a load short
Fast disable via EN pin, typically 200ns.
4A gate discharge current
Internal charge pump
Fault status indication
Applications
Telecom System, ≤80V operation & 100V/100ms
Transient
N+1 Redundant Power Systems
Servers & High End Computing
High Side Circuit Breaker and Load Disconnect
Package Information
The PI2061 is offered in the following package:
10 Lead 3mm x 3mm DFN package
Application Information
12V Typical Application Example
48V Typical application Example
Layout Recommendation
Package Drawings
Ordering Information
9
12
13
14
15
15
Typical Application:
Event: Output Short
Vin
RS Iout
Vout
RVC
VC
0.1µF
26
GATE SP
3 VC
7
SN
D2
5 EN PI2061
4 SGND
PGND
1
FT 9 FT
D1
RTN
RPG
Figure 1: PI2061 in High Side Disconnect switch application
Current Trip Level
0A
Output Current
Over Current detection
Vout
Vin
MOSFET Turn Off Time
120ns
0V
Figure 2: PI2061 response time to output short fault condition
Picor Corporation • picorpower.com
PI2061
Rev 1.4
Page 1 of 16




Picor

PI2061 Datasheet Preview

PI2061 Datasheet

High Side High Voltage Load Disconnect Switch Controller IC

No Preview Available !

Not Recommended for New Designs
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 (RVC) 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 RPG 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
GATE
VC
SGND
EN
1
2
3
4
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


Part Number PI2061
Description High Side High Voltage Load Disconnect Switch Controller IC
Maker Picor
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