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參數(shù)資料
| 型號： | LT1620IGN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | CAP 0.1UF 200V 10% X7R SMD-1206 TR-7 PLATED-NI/SN |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 282K |
| 代理商： | LT1620IGN |
3
LT1620/LT1621
ELECTRICAL C
IN
+
= 16.8V, V
CC
= 5V, V
IOUT
= 2V, T
A
= 25
°
C unless otherwise noted.
HARA TERISTICS
The
G
denotes specifications which apply over the full operating
temperature range.
Note 1:
Absolute Maximum Ratings are those values beyond which the
life of a device may be impaired.
Note 2:
Input bias currents are disabled when V
CC
is removed, even
with common mode voltage present at IN
+
, IN
–
.
SYMBOL
Current Sense Amplifier
V
OSAVG
Input Offset - Measured at
×
10 Output
(V
AVG
)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
CC
≤
V
CM
≤
32V
35mV
≤
V
ID
≤
125mV
V
CM
= 0V, V
ID
= 80mV
V
CC
≤
V
CM
≤
32V
0V
≤
V
ID
≤
35mV
0V
≤
V
CM
≤
32V, V
ID
= 0V, Referenced to V
CC
V
CC
≤
V
CM
≤
32V (Note 2)
–3
–4
–10
–3
–4
–0.1
200
185
3
4
mV
mV
mV
mV
mV
mV
μ
A
μ
A
mA
mA
G
G
15
3
4
V
OSAVG2
Input Offset - Measured at
×
20 Output
(V
AVG2
)
No-Load Output Offset
I
B(IN
+
, IN
–
)
Input Bias Current (Sink)
G
V
SENSE
G
–3
270
400
430
5.25
5.50
G
Input Bias Current (Source)
V
CM
= 0V (Note 2)
4.0
G
Transconductance Amplifier
g
m
Amplifier Transconductance
3000
2200
60
3500
4000
4800
μ
mho
μ
mho
G
A
V
V
OLIOUT
Amplifier Voltage Gain
I
OUT
Saturation Limit (Sink)
1V
≤
V
IOUT
≤
3V
I
IOUT
= 50
μ
A
I
IOUT
= 200
μ
A
I
IOUT
= 1mA
80
0.05
0.10
0.35
dB
V
V
V
V
nA
mV
mV
G
G
G
0.15
0.30
0.65
V
CC
V
PROG
I
BPROG
V
OSPROG
PROG Input Range
Input Bias Current
Input Offset Voltage
(V
AVG
– V
PROG
)
G
V
CC
– 1.25
Measured at PROG Pin
I
IOUT
= 130
μ
A
20
–7
–8
7
8
G
End-of-Cycle Comparator
V
PROG2
PROG2 Input Range
V
HYST
Input Hysteresis
I
BPROG2
Input Bias Current
V
OLMODE
Output Logic Low Output (Sink)
G
V
CC
– 2.5
V
CC
– 0.15
V
Measured at AVG2 Pin
Measured at PROG2 Pin
I
MODE
= 0.5mA
I
MODE
= 10mA
15
20
0.1
0.5
mV
nA
G
G
0.5
1.2
V
V
PI FU
V
CC
:
5V
±
10% Power Supply Input.
IN
+
:
Sense Amplifier Positive Input. Typically connected
to inductor side of current sense resistor. Common mode
voltage range is 0V to 32V.
IN
–
:
Sense Amplifier Negative Input. Typically connected
to load side of current sense resistor. Common mode
voltage range is 0V to 32V.
SENSE:
Sense Amplifier A
V
= –1 Output. Used as level-
shifted output for PWM controller current sense input. The
sense output is designed to have an inherent offset to
U
ensure continuity around zero inductor current. Typical out-
put is –3mV with differential input voltage (IN
+
– IN
–
) = 0.
AVG:
Sense Amplifier A
V
= –10 Output and
Transconductance Amplifier Positive Input. Used as inte-
gration node for average current control. Integration time
constant is calculated using 2.5k
typical output imped-
ance.
PROG:
Transconductance Amplifier Negative Input. Pro-
gram node for average current delivered to load during
current mode operation. Average current delivered to load
imposes voltage differential at current sense amplifier
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