參數(shù)資料
型號(hào)： UC1886
廠商： Texas Instruments, Inc.
英文描述： Average Current Mode PWM Controller IC
中文描述： 平均電流模式PWM控制IC
文件頁(yè)數(shù)： 3/8頁(yè)
文件大?。?/td> 292K
代理商： UC1886
3
UC1886
UC2886
UC3886
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VCC = 12V, V
COMMAND
= 3.0V, CT = 1nF, RT = 10k,
T
A
= T
J
= 0°C < T
A
< 70°C for the UC3886
.
(Note: –25°C < T
A
< 85°C for the UC2886, and –55°C < T
A
< 125°C for the UC1886)
PARAMETER
TEST CONDITIONS
Input Buffer
Gain
I
BUF
= ± 500
μ
A (UC3886)
I
BUF
= ± 500
μ
A (UC2886, UC1886)
Current-Sense Amplifier
Input Offset Voltage
V
CM
= 3.0V (UC3886)
V
CM
= 3.0V (UC2886, UC1886)
Input Bias Current
V
CM
= 3.0V
Input Offset Current
V
CM
= 3.0V
Open Loop Gain
2V < V
ISO
< 6V
CMRR
0V < V
CM
< 4.5V
PSRR
11V < VCC < 15V
Output High Voltage
I
ISO
= –100
μ
A
Output Low Voltage
I
ISO
= 1mA
Output Source Current
V
ISO
= 2V
Gain-Bandwidth Product
F = 100kHz
Current Amplifier
Input Offset Voltage
V
CM
= 3.0V (UC3886)
V
CM
= 3.0V (UC2886, UC1886)
Input Bias Current
V
CM
= 3.0V
Open Loop Gain
1V < V
CAO
< 3V
CMRR
1.5V < V
CM
< 4.5V
PSRR
11V < VCC < 15V
Output High Voltage
I
CAO
= –100
μ
A
Output Low Voltage
I
CAO
= 100
μ
A
Output Source Current
V
CAO
=1V
Gain-Bandwidth Product
F = 100kHz
Oscillator
Frequency
RT = 10k, CT = 1nF (UC3886)
RT = 10k, CT = 1nF (UC2886, UC1886)
Frequency Change With Voltage
11V > VCC > 15V
CT Peak Voltage
CT Valley Voltage
CT Peak-to-Peak Voltage
Output Section
Output Low Voltage
I
GATE
= 200mA
Output High Voltage
I
GATE
= –200mA
Output Low Voltage
5V < VCC < 9V, I
GATE
= 10mA
V
CAO
< 0.8V, I
GATE
= 10mA
Rise/Fall Time
C
L
= 1nF
Maximum Duty Cycle
(UC3886)
(UC2886, UC1886)
MIN
TYP
MAX
UNITS
0.98
0.95
1
1.02
1.05
V/V
V/V
2
6
-1
0.2
mV
mV
μ
A
μ
A
dB
dB
dB
V
V
mA
MHz
60
60
60
5
85
85
85
1
0.2
2
3.5
13
18
1
mV
mV
μ
A
dB
dB
dB
V
V
mA
MHz
60
60
60
3
85
85
85
3.3
1
0.1
2
–0.25
3.5
90
85
100
110
115
1
kHz
kHz
%
V
V
V
2.6
2.8
1
1.8
1.2
2.0
1.6
1.6
10.3
2.2
V
V
V
V
ns
%
%
9
0.5
0.5
150
90
85
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