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PI2211
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Electrical Specifications
Unless otherwise specified: -40 ? C < T J < 125 ? C, BUS = 4.5 to 14 Volts (No Auxiliary Supply at VCC), BUS = 0.9 to 4.5 Volts ( 4.2 V < VCC
< VCC Clamp). R ACC = 20.0k
Parameter
Min
Typ
Max
Units
Conditions
SOA
Differential Current Sense Level Range for SOA (CSP
to CSN)
0
80
mV
SOAS
Ω
SOAS Current Scaling Factor (R SENSE * R SOAS )
10
2
This is the means to scale current for
SOA.
R SOAS Resistor Range
(SOA Note 1)
1
20
k Ω
RACC resistor 20 K.
V DS range (CSN to SRC), Active SOA
V DS min
VBUS
V
Minimum V DS Sense Level to enable SOA Shutdown
23
33
mV
Below this level SOA shutdown is
disabled.
SOAR
Rth jc Range
0.38
7.5
o
C/W
Range for exposed pad MOSFETs
SOAR to Rth jc Conversion Factor
0.38
o
C/(W ?kΩ)
RACC resistor 20 K.
R SOAR Resistor Range
(SOA Note 1)
1
20
k Ω
RACC resistor 20 K.
Rth ca
60
60
60
o
C/W
Value Fixed Digitally
One unit = 1 V * 1 A *1 C/W, SOA Note
SOA Shaper 2 Input Range (V DS * I * Rth ca ),
4800
Units
1
o
SOA Update Rate (Time from A/D Acquisition of V DS
& I to Update of Digital Filter)
13.5
15
16.5
us
Includes all A/D conversions, and all
multiplications.
SOAT
SOA Shaper 1: Tau p Range
SOAT to Tau p Conversion Factor
R SOAT Resistor Range
0.96
1.3
19.27
19.27
20
ms
k Ω ? ms
k Ω
SOA Note 2
RACC resistor 20 K.
SOA Shaper 1: (Tau z / Tau p ) Ratio
1/8
1/8
1/8
SOA Note 2
SOA Shaper 2: Tau
A/D Anti-Aliasing Filter 3 dB
1.8
3.3
2
2.2
13
sec
KHz
SOA Note 2
SOA Comparator Input Resolution
1.19
°C
SOA Comparator Hi Threshold
SOA Comparator Lo Threshold
SOA Comparator Lo Threshold
60
21
3
°C
°C
°C
All SOA cycles
First 16 SOA cycles.
Beyond 16 SOA cycles.
SOA Note 1: Recommended minimum resistor value is 1.30k
SOA Note 2: SOA Shaper 1 has a function that is represented by a normalized step response of the form:
SOA Shaper 2 is represented by a normalized step response of the form:
See "Junction to Case Thermal Response" section for further details.
Picor Corporation · picorpower.com
PI2211
Rev 1.0, Page 6 of 26
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