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ST1843 数据表(PDF) 11 Page - STMicroelectronics

部件名 ST1843
功能描述  Rad-tolerant current mode PWM controller
PDF  25 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST1843 数据表(HTML) 11 Page - STMicroelectronics

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ST1843 - ST1845
Radiation characteristics
Doc ID 019049 Rev 1
11/25
Current sense section
GV
Gain
VI = 15V; RT = 10kΩ; CT = 3.3nF;
2.85
3.15
V/V
V3
Maximum input signal
VI = 15V; RT = 10kΩ; CT = 3.3nF; VPIN1 =
2.3V;
0.9
1.1
V
SVR
Supply voltage rejection
12V
≤ V
i ≤ 25V; RT = 10kΩ; CT = 3.3nF;
60
dB
Ib
Input bias current ST1843
VI = 15V; RT = 10kΩ; CT = 3.3nF;
-50
µA
Input bias current ST1845
-45
DO
Delay to output
VI = 15V; RT = 10kΩ; CT = 3.3nF;
300
ns
Output section
VOL1
Output low level
VI = 15V; RT = 10kΩ; CT = 3.3nF; ISINK =
20mA
0.4
V
VOL2
Output low level
VI = 15V; RT = 10kΩ; CT = 3.3nF; ISINK =
200mA
2.2
V
VOH1
Output high level
VI = 15V; RT = 10kΩ; CT = 3.3nF; ISOURCE =
20mA
13
V
VOH2
Output high level
VI = 15V; RT = 10kΩ; CT = 3.3nF; ISOURCE =
200mA
12
V
VOLS
UVLO saturation
VI = 15V; RT = 10kΩ; CT = 3.3nF; ISINK = 1mA
1.1
V
TR
Rise time
VI = 15V; RT = 10kΩ; CT = 3.3nF; CL = 1nF
180
ns
TF
Fall time
VI = 15V; RT = 10kΩ; CT = 3.3nF; CL = 1nF
180
ns
Under-voltage lockout section
VTH
Start threshold for ST1843
VI = 15V; RT = 10kΩ; CT = 3.3nF;
7.8
9.5
V
Start threshold for ST1845
7.8
10.5
VMIN
Min operating voltage after
turn-on for ST1843
VI = 15V; RT = 10kΩ; CT = 3.3nF;
78.6
V
Min operating voltage after
turn-on for ST1845
79
DCMAX
Max duty cycle
VI = 15V; RT = 10kΩ; CT = 3.3nF;
94
100
%
DCMIN
Min duty cycle
VI = 15V; RT = 10kΩ; CT = 3.3nF;
0%
Total stand-by current
IST
Start-up current
VI = 6.5V; RT = 10kΩ; CT = 3.3nF;
0.5
mA
Ii
Operating supply current
VI = 15V; RT = 10kΩ; CT = 3.3nF; VPIN2 =
VPIN3 = 0V
17
mA
Viz
Zener voltage
VI = 15V; RT = 10kΩ; CT = 3.3nF; Ii = 25mA
30
V
Table 7.
Electrical parameter during irradiation testing (continued)
Symbol
Parameter
Test conditions
Values
Unit
Min.
Max.



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