UC3903N UNITRODE, UC3903N Datasheet - Page 3

• Manufacturer Part Number: UC3903N
• Description: IC, SUPPLY/LINE MONITOR 18mA, 40V 18-DIP
• Manufacturer: UNITRODE

Specifications of UC3903N

• Threshold Voltage: 2.5V
• No. Of Supervisors / Monitors: 4
• Supply Voltage Range: 8V To 40V
• Reset Type: Active-Low
• Supply Current: 18mA
• Delay Time: 30ms
• Digital Ic Case Style: DIP
• No. Of Pins: 18
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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ELECTRICAL CHARACTERISTICS
Unless otherwise stated, these specifications apply for T
UC2903; and 0°C to +70°C for the UC3903; +V
(1) Reference to pin numbers in this specification pertain to 18 pin DIL N and J packages and 18 pin SOIC DW package.
(2) These currents represent maximum input bias currents required as the sense inputs cross appropriate thresholds.
Copyright © 1999–2008, Texas Instruments Incorporated
SUPPLY
REFERENCE
FAULT THRESHOLDS
SENSE INPUTS
OV AND UV FAULT DELAY
Input Supply Current
Supply Under Voltage Threshold
(V
Minimum Supply to Enable Power
OK Output
Output Voltage (V
Load Regulation
Line Regulation
Short Circuit Current
OV Threshold Adj.
UV Threshold Adj.
OV & UV Threshold Hyst.
OV & UV Threshold Supply
Sensitivity
Adjust Pin (Pin 4) Input Bias Current
Line Sense Threshold
Line Sense Threshold Hyst.
Sense 1-4 Input Bias Current
Line Sense Input Bias Current
Charging Current
Threshold Voltage
Threshold Hysteresis
Delay
SUV
)
........................................................................................................................................
PARAMETER
(1)
REF
)
No Faults
UV, OV and Line Fault
Fault Outputs Enabled
T
Over Temperature
IL = 0 to 10mA
+V
TJ = 25°C
Offset from V
4 Input = Low to High, 0.5V ≤ V
Offset from V
4 Input = High to Low, 0.5V ≤ V
0.5V ≤ V
+V
0.5V ≤ VP
Input = High to Low
Input = 2.8V
Input = 2.2
Input = 2.3V
Delay Pin = Low to High
T
Ratio of Threshold Voltage to Charging
Current
J
J
= 25°C
IN
IN
= 25°C
= 8 to 40V
= 8V to 40V
Product Folder Link(s):
PIN
IN
(2)
4 ≤ 2.5V
4 ≤ 2.5V
(2)
(2)
TEST CONDITIONS
REF
REF
IN
as a function of V
as a function of V
= 15V; Sense Inputs (Pins 6–9 and Pin 15) = 2.5V; V
A
= –55°C to +125°C for the UC1903; –40°C to +85°C for the
PIN
PIN
UC1903 UC2903 UC3903
4 ≤ 2.5V
PIN
4 ≤ 2.5V
PIN
–0.270
2.485
2.465
0.230
1.94
MIN
125
UC1903 / UC2903
6.0
SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008
10
20
–0.25
0.002
TYP
0.25
175
250
7.0
3.0
2.5
2.0
1.8
10
40
20
±1
–1
60
30
7
1
1
1
1
Submit Documentation Feedback
–0.230
2.515
2.535
0.270
MAX
0.01
2.06
225
±10
7.5
4.0
15
10
30
–3
50
9
4
3
3
–0.270
2.470
2.465
0.230
MIN
100
5.5
1.9
10
20
PIN
UC3903
–0.25
0.002
TYP
0.25
4 = 1.0V, T
175
250
7.0
3.0
2.5
2.0
1.8
10
40
20
±1
–1
60
30
7
1
1
1
1
–0.270
2.530
2.535
0.270
MAX
0.02
±12
250
8.0
4.0
2.1
11
18
15
30
50
-6
8
6
6
UC1903
UC2903
UC3903
A
= T
ms/ F
UNIT
mV/V
%/V
V/V
V/V
mA
mA
mV
mV
mA
mV
mV
A/V
V
V
V
V
V
V
A
A
A
A
J
.
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