PI2061 Datasheet, PDF (1/16 Pages) Vicor Corporation – High Side High Voltage Load Disconnect Switch Controller IC

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.
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
Table of Contents:
 Pin Description
2
 Electrical Specifications
3
 Functional Description
5
 Block Diagram
6
 State Diagram
7
 Typical Characteristics Plots
8
 Application Information
9
 12V Typical Application Example 12
 48V Typical application Example 13
 Layout Recommendation
14
 Package Drawings
15
 Ordering Information
15
Typical Application:
Event: Output Short
Vin
RS _Iout
Vout
RVC
VC
0.1µF
26
GATE SP
3 _VC
7
SN
D2 _D1
5 _EN PI2061
4 _SGND
PGND
1
FT ⁹ FT
RPG
RTN
Figure 1: PI2061 in High Side Disconnect switch application
Current Trip Level
0A
Output Current
Over Current detection
Vin
Vout
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