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UC2902N Fiches technique(PDF) 3 Page - Texas Instruments

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No de pièce UC2902N
Description  LOAD SHARE CONTROLLER
Download  10 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

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UC2902
UC3902
SLUS232E − DECEMBER 19, 2002 − REVISED JULY 2011
3
www.ti.com
ELECTRICAL CHARACTERISTICS
TJ = –40°C to 105°C, (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Power SUPPLY SUPPLY CURRENT
I
Supply current
SHARE+ = 1 V,
SENSE = 0 V
4
6
mA
ICC
Supply current
VCC = 20 V
6
10
mA
UNDERVOLTAGE LOCKOUT
VCC
Startup voltage
SHARE+ = 0.2 V, SENSE = 0 V, COMP = 1 V
2.3
2.5
2.7
V
Hysteresis
SHARE+ = 0.2 V, SENSE = 0 V, COMP = 1 V
60
100
140
mV
CURRENT SENSE AMPLIFIER
VIO
Input offset voltage
0.1 V ≤ V(SHARE+) ≤ 1.1 V
−2.5
−0.5
1.5
mV
SENSE to SHARE gain
0.1 V ≤ V(SHARE+) ≤ 1.1 V
−41
−40
−39
V
RIN
Input resistance
0.6
1
1.5
V
SHARE DRIVE AMPLIFIER
VCC = 2.5 V
V(SENSE) = −50 mV
I(SHARE+) = −1 mA
1.2
1.4
VOH
High-level output voltage,
SHARE+
VCC = 12 V
V(SENSE) = −250 mV
I(SHARE+) = −1 mA
9.6
10.0
10.4
V
SHARE+
VCC = 20 V
V(SENSE) = −250 mV
I(SHARE+) = −1 mA
9.6
10.0
10.4
VCC = 2.5 V
V(SENSE) = 10 mV
I(SHARE+) = −1 mA
20
50
VOL
Low-level output voltage, SHARE+
VCC = 12 V
V(SENSE) = 10 mV
I(SHARE+) = −1 mA
20
50
mV
VCC = 20 V
V(SENSE) = 10 mV
I(SHARE+) = −1 mA
20
50
mV
VO
Output voltage, SHARE+
V(SENSE) = 0 mV,
R(SHARE+) = 200 Ω
(SHARE+ to GND)
20
40
CMRR
Common mode rejection ratio
0 V ≤ V(SHARE−) ≤ 1 V,
SENSE used as input to amplifier
50
90
dB
Load regulation
Load on SHARE+, 1 mA ≤ ILOAD ≤ −20 mA
V(SENSE) = −25 mV
0
20
mV
ISC
Short circuit current
V(SHARE+) = 0 V,
V(SENSE) = −25 mV
−85
−50
−20
mA
Slew rate
V(SENSE) = 10 mV to −90 mV step
R(SHARE+) = 200 Ω (SHARE+ to GND)
0.12
0.26
0.38
V/ s
Slew rate
V(SENSE) = −90 mV to 10 mV step
R(SHARE+) = 200 Ω (SHARE+ to GND)
0.12
0.26
0.38
V/μs


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