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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 292K |
| 代理商： | UC1886 |
2
UC1886
UC2886
UC3886
CONNECTION DIAGRAM
DIL-16, SOIC-16 (Top View)
J, N, or D Packages
ABSOLUTE MAXIMUM RATINGS
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
Output Current
CAM, COMMAND, VSENSE, ISN, ISP. . . . . . . . . . . . . ± 1A
Analog Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 7V
Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature. . . . . . . . . . . . . . . . . . . –55°C to +150°C
Lead Temperatue (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C
Currents are positive into, negative out of the specified terminal.
Consult Packaging Section of Databook for thermal limitations
and considerations of packages.
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
Overall
Supply Current
VCC = 11V, Gate Open
VCC = 9.3V
Undervoltage Lockout
Start Threshold
UVLO Hysteresis
Voltage Error 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 (UC3886)
V
CM
= 3.0V (UC2886, UC1886)
Open Loop Gain
2.5V < V
COMP
< 3.5V
Common-Mode Rejection Ratio
2V < V
COMP
< 4V
Power Supply Rejection Ratio
11V < VCC < 15V
Output High Voltage (Clamp)
I
COMP
= –100
μ
A (UC3886)
I
COMP
= –100
μ
A (UC2886, UC1886)
Output Low Voltage (Clamp)
I
COMP
= 100
μ
A
Output Sink Current
V
COMP
= 3.7V
Output Source Current
V
COMP
= 2.8V
Gain-Bandwidth Product
F = 100kHz
5.0V Reference
Output Voltage
I
VREF
= 1.0mA
Total Variation
Line, Load, Temperature
Line Regulation
11V < VCC < 15V
Load Regulation
0 < I
VREF
< 2mA
Short Circuit Current
MIN
TYP
MAX
UNITS
10
15
5
mA
mA
9.7
10.3
0.25
10.8
0.4
V
V
4
mV
mV
μ
A
μ
A
μ
A
dB
dB
dB
V
V
V
mA
mA
MHz
15
2
0.01
0.1
60
60
60
3.95
3.9
1.9
0.9
–0.15
2
85
85
85
4
4.05
4.1
2.7
0.25
3.5
4.9
4.825
5
5.1
5.175
10
15
40
V
V
mV
mV
mA
–10
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