IP1844 View Datasheet(PDF) - Semelab - > TT Electronics plc
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IP1844 Datasheet PDF : 6 Pages
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SEME
LAB
IP1844 SERIES
IP1845 SERIES
ELECTRICAL CHARACTERISTICS (Over Full Operating Temperature Range unless otherwise stated)
Parameter
Test Conditions
IP1844/IP1845
IP2844/IP2845
Min. Typ. Max.
Min.
IP3844
IP3845
Typ.
Max. Units
Gain
CURRENT SENSE SECTION
See Notes 2,3
2.85
3
3.15 2.85
3
3.15 V/V
Maximum Input Signal
Supply Voltage
Rejection
VPIN1 = 5.0V
VC = 12V to 25V
(Note 2)
0.9
1
1.1 0.9
1
1.1 V
60
70
60
70
dB
Input Bias Current
–2
–10
–2
–10 µA
Delay to Output
150 300
150 300 ns
OUTPUT SECTION
Output Low Level
Output High Level
Rise Time
Fall Time
UVLO Saturation
ISINK = 20mA
0.1
0.4
ISINK = 200mA
1.5
2.2
ISOURCE = 20mA
13
13.5
13
ISOURCE = 200mA
12
13.5
12
CL = 1nF
50
150
CL = 1nF
50
150
VCC = 6V
IL = 1mA
0.7
1.1
UNDER–VOLTAGE LOCKOUT SECTION
0.1
0.4
V
1.5
2.2
13.5
V
13.5
50
150
ns
50
150
0.7
1.1 V
Upper Threshold
(VCC)
Lower Threshold
(VCC)
1844 Series
1845 Series
1844 Series
1845 Series
TOTAL STANDBY CURRENT
15
16
17 14.5 16 17.5
V
7.8
8.4
9
7.8
8.4
9
9
10
11 8.5
10 11.5
V
7
7.6
8.2
7
7.6
8.2
Start–up Current
0.3
0.5
0.3
0.5 mA
Operating Supply
Current
VPIN2 = 0V
VPIN3 = 0V
1844 Series
1845 Series
11
15
14
17
11
15
mA
14
17
VCC Zener Voltage
ICC = 25mA
30
34
40 30
34
40 V
PWM SECTION
Maximum Duty Cycle
Minimum Duty Cycle
47
48
50 46
48
50
%
0
0
NOTES
1. Test Conditions unless otherwise stated:
2. Parameter measured at trip point of latch with
VCC = 15V* , RT = 10kΩ , CT = 3.3nF , f = 52kHz.
*Adjust VCC above start threshold before setting at
required level.
All specifications apply over the full operating temperature
VPIN2 = 0V
3. Gain defined as:
A = ∆VPIN1
∆VPIN3
0 ≤ VPIN3 ≤ 0.8
range unless otherwise stated.
(See Ordering Information for further details).
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 2/95
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