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UC2903 Fiches technique(PDF) 3 Page - Texas Instruments

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No de pièce UC2903
Description  Quad Supply and Line Monitor
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC2903 Fiches technique(HTML) 3 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS:
PARAMETERS
TEST CONDITIONS
UC1903/UC2903
UC3903
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
Fault Thresholds (cont.)
OV & UV Threshold Hyst.
0.5V
≤ VPIN 4 ≤ 2.5V
10
20
30
10
20
30
mV/V
OV & UV Threshold Supply
Sensitivity
+VIN = 8V to 40V
.002
.01
.002
.02
%/V
Adjust Pin (Pin 4)
Input Bias Current
0.5V
≤ VPIN 4 ≤ 2.5V
±1
±10
±1
±12
µA/V
Line Sense Threshold
Input = High to Low
1.94
2.0
2.06
1.9
2.0
2.1
V
Line Sense Threshold Hyst.
125
175
225
100
175
250
mV
Sense Inputs
Sense 1-4
Input Bias Current
Input = 2.8V (Note 2)
1
3
1
6
µA
Input = 2.2 (Note 2)
-1
-3
-1
-6
µA
Line Sense Input
Bias Current
Input = 2.3V (Note 2)
1
3
1
6
µA
OV and UV Fault Delay
Charging Current
60
60
µA
Threshold Voltage
Delay Pin = Low to High
1.8
1.8
V
Threshold Hysteresis
TJ = 25°C
250
250
mV
Delay
Ratio of Threshold Voltage to Charging
Current
20
30
50
20
30
50
ms/
µF
Fault Outputs (OV, UV, & Power 0K)
Maximum Current
VOUT = 2V
30
70
30
70
mA
Saturation Voltage
IOUT = 12mA
.25
.40
.25
.40
V
Leakage Current
VOUT = 40 V
3
25
3
25
µA
Sense 4 Inverter (Note 3)
Input Offset Voltage
2
8
2
10
mV
Input Bias Current
.1
2
.1
4
µA
Open Loop Gain
65
80
65
80
dB
PSRR
+VIN = 8 to 40 V
65
100
65
100
dB
Unity Gain Frequency
1
1
MHz
Slew Rate
.4
.4
V/
µs
Short Circuit Current
TJ = 25°C
40
40
mA
G.P. Op-Amp (Note 3)
Input Offset Voltage
1
5
1
8
mV
Input Bias Voltage
.1
2
.1
4
µA
Input Offset Current
.01
.5
.01
1.0
µA
Open Loop Gain
65
120
65
120
dB
CMRR
VCM = 0 to +VIN = 2.0V
65
100
65
100
dB
PSRR
+VIN = 8 to 40V
65
100
65
100
dB
Unity Gain Frequency
1
1
MHz
Slew Rate
.4
.4
V/
µs
Short Circuit Current
TJ = 25°C
40
40
mA
Note 2: These currents represent maximum input bias currents required as the sense inputs cross appropriate thresholds.
Note 3: When either the G.P. OP-Amp, or the Sense 4 Inverter, are configured for sensing a negative supply voltage, the divider
resistance at the inverting input should be chosen such that the nominal divider current is
≤ 1.4mA. With the divider current
at or below this level possible latching of the circuit is avoided. Proper operation for currents at or below 1.4mA is 100%
tested in production.
Note 4: Reference to pin numbers in this specification pertain to 18 pin DIL N and J packages and 18 pin SOIC DW package.
UC1903
UC2903
UC3903
Unless otherwise stated, these specifications apply for TA = –55°C to +125°C for the
UC1903; –40°C to +85°C for the UC2903; and 0°C to +70°C for the UC3903; +VIN =
15V; Sense Inputs (Pins 6–9 and Pin 15) = 2.5V; VPIN 4 = 1.0V, TA = TJ.
3


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