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參數(shù)資料
| 型號： | UCC2857 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Isolated Boost PFC Preregulator Controller |
| 中文描述： | 隔離升壓PFC前置穩(wěn)壓器控制器 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 127K |
| 代理商： | UCC2857 |
3
UCC1857
UCC2857
UCC3857
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated, these specifications apply for T
A
= 0°C to 70°C for the
UCC3857, –40°C to +85°C for the UCC2857, and –55°C to +125°C for the UCC1857, V
VIN
, V
VD
= 12V, R
T
= 19.2K, C
T
= 680pF.
T
A
= T
J
.
PARAMETER
TEST CONDITIONS
Input Supply
Supply Current, Active
No Load on Outputs, V
VD
= V
VIN
Supply Current, Startup
No Load on Outputs, V
VD
= V
VIN
VIN UVLO Threshold
UVLO Threshold Hysteresis
Reference
Output Voltage (V
VREF
)
T
J
= 25°C, I
REF
= 1mA
Over Temperature, UCC3857
Over Temperature, UCC1857, UCC2857
Load Regulation
I
REF
= 1mA to 10mA
Line Regulation
V
VIN
= V
VD
= 12V to 16V
Short Circuit Current
V
VREF
= 0V
Current Amplifier
Input Offset Voltage
(Note 1)
Input Bias Current
(Note 1)
Input Offset Current
(Note 1)
CMRR
V
CM
= 0V to 1.5V, V
CAO
= 3V
AVOL
V
CM
= 0V, V
CAO
= 2V to 5V
VOH
Load on CAO = 50
μ
A, V
MOUT
= 1V, V
CA–
= 0V
VOL
Load on CAO = 50
μ
A, V
MOUT
= 0V, V
CA–
= 1V
Maximum Output Current
Source : V
CA–
= 0V, V
MOUT
= 1V, V
CAO
= 3V
Sink : V
CA–
= 1V, V
MOUT
= 0V, V
CAO
= 3V
Gain Bandwidth Product
f
IN
= 100kHz, 10mV p – p
Voltage Amplifier
Input Voltage
Measured on V
VA–,
V
VAO
= 3V
Input Bias Current
Measured on V
VA–,
V
VAO
= 3V
AVOL
V
VAO
= 1V to 5V
VOH
Load on V
VAO
= –50
μ
A, V
VA–
= 2.8V
VOL
Load on V
VAO
= 50
μ
A, V
VA–
= 3.2V
Maximum Output Current
Source: V
VA–
= 2.8V, V
VAO
= 3V
Sink: V
VA–
= 3.2V, V
VAO
= 3V
Oscillator
Initial Accuracy
T
J
= 25°C
MIN
TYP
MAX
UNITS
3.5
60
13.75
3.75
5
mA
μ
A
V
V
TBD
15.5
TBD
3
7.387
7.368
7.313
7.5
7.5
7.5
2
2
–55
7.613
7.631
7.687
10
15
–30
V
V
V
mV
mV
mA
–3
0
3
mV
nA
nA
dB
dB
V
V
μ
A
mA
MHz
–50
25
80
85
7
0.2
–150
30
5
65
6
5
3
50
2.9
3
3.1
V
nA
dB
V
V
mA
mA
–50
75
5.55
0.1
–12
20
5.3
5.7
0.45
–5
30
–20
5
42.5
40
50
50
1
4.5
1.5
57.5
60
kHz
kHz
%
V
V
Voltage Stability
CT Ramp Peak-Valley Amplitude
CT Ramp Valley Voltage
Output Drivers
VOH
VOL
Rise Time
Fall Time
Trailing Edge Delay
Delay Time
V
VIN
= 12V to 18V
4
5
IL = –100mA
IL = 100mA
C
LOAD
= 1nF
C
LOAD
= 1nF
9
10
0.1
25
10
V
V
ns
ns
0.5
TBD
TBD
R
D
= 12k, C
D
= 200pF, V
VAO
= 4V
1.6
2
2.4
μ
s
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