參數(shù)資料
型號(hào)： UC2870DW-1
英文描述： Power management system IC
中文描述： 電流模式開(kāi)關(guān)電源控制器
文件頁(yè)數(shù)： 3/10頁(yè)
文件大小： 352K
代理商： UC2870DW-1
3
UC1870 -1/ -2
UC2870 -1/ -2
UC3870 -1/ -2
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated these specifications apply for T
A
= –55°C to +125°C for
UC1870X; –25°C to +85°C for UC2870X; 0°C to +70°C for UC3870X; VCC = 12V, C
T
= 680pF, C
CAP
= 1 F; C
BOOT
= 0.1 F,
T
A
= T
J
.
PARAMETER
TEST CONDITIONS
Overall Section
Supply Current, Sleep
SOFTSTART=0V; T
A
= 25°C
Supply Current, Operating
VCC Turn-on Threshold
UCX870-2
UCX870-1
VCC Turn-off Threshold
UCX870-2
UCX870-1
Voltage Amplifier Section
Input Voltage Offset
T
A
= 25°C
VSNS Bias Current
Transconductance
I
COMP
=
+
10 A to –10 A; UC3870 -1, -2;
UC2870 -1, -2;
I
COMP
=
+
5 A to –5 A; UC1870 -1, -2
V
OUT
High
V
OUT
Low
Output Source Current
V
OUT
= 1V; UC3870 -1, -2; UC2870 -1, -2;
V
OUT
= 1V; UC1870 -1, -2
Current Amplifier Section
Input Offset Voltage
V
COMP
= 2.5V
Input Bias Current(sense)
V
CM
= 2.5V
Open Loop Gain
V
CM
= 2.5V, V
OUT
= 1V to 3.5V
V
OUT
High
R
CAOUT
= 100k to GND, T
A
= 25°C
V
OUT
Low
R
CAOUT
= 100k to VREF, T
A
= 25°C
Output Source Current
V
OUT
= 0V, T
A
= 25°C
Common Mode REJ Ratio
V
CM
= 2V to 3V
Gain Bandwidth Product
F
IN
= 100kHz, 10mV p-p
Reference Section
Output Voltage
I
REF
= 0mA, T
A
= 25°C
I
REF
= 0mA
Load Regulation
I
REF
= 0mA to 5mA
Line Regulation
VCC = 12V to 24V
Short Circuit Current
VREF = 0V
MIN
TYP
MAX
UNITS
30
8.5
10
4.5
9
4.4
75
12
10.5
4.8
A
mA
V
V
V
V
8.2
4.1
–30
–500
400
0
30
500
1000
mV
nA
Mho
25
675
250
2.8
675
3.1
0.15
35
35
1250
3.25
1
Mho
V
V
A
A
10
5
–6
0
6
mV
nA
dB
V
V
A
dB
MHz
–500
80
3.6
500
110
3.7
0.7
100
90
3.5
0.86
120
80
70
2
2.462
2.437
2.5
2.5
2
2
20
2.538
2.563
±
15
±
15
25
V
V
mV
mV
mA
10
UC
870
–
ORDERING INFORMATION
UVLO Turn
On/Off
Threshold
1: 4.5V/4.4V
2: 10V/9V
Package
Temperature
Range
J: Ceramic DIL-18
N: Plastic DIL-18
DW: SOIC-18
1: –55°C to +125°C
2: –40°C to +85°C
3: 0°C to +70°C
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