參數(shù)資料
型號： UC2854BL
廠商： Texas Instruments, Inc.
英文描述： Analog IC
中文描述： 模擬IC
文件頁數(shù)： 4/16頁
文件大?。?/td> 455K
代理商： UC2854BL
SLUS329B JUNE 1998 REVISED FEBRUARY 2005
4
www.ti.com
ELECTRICAL CHARACTERISTICS
VCC = 18 V, RT = 8.2 k
, CT = 1.5 nF, VPKLMT = 1 V, VVRMS = 1.5 V, IIAC = 100
μ
A, IISENSE = 0 V, VCAO = 3.5 V, VVAO = 5 V, VVSENSE = 3 V,
40
°
C < TA < 85
°
C for the UC2854A and UC2854B, and 0
°
C < TA <70
°
C for the UC3854A and UC3854B, and TA = TJ (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OVERALL
Supply current, off
CAO = 0 V,
VCC = VUVLO0.3 V
VAO = 0 V,
250
400
μ
A
Supply current, on
12
18
mA
VCC turn-on threshold voltage
UCx854A
15.0
16.0
17.5
UCx854B
8.0
10.5
11.2
V
VCC turn-off threshold voltage
VCC clamp
VOLTAGE AMPLIFIER
9
10
12
IVCC = IVCC(on) + 5 mA
18
20
22
Input voltage
2.9
3.0
3.1
V
VSENSE bias current
Open loop gain
500
25
500
nA
2 V
≤
VOUT
≤
5 V
ILOAD = 500
μ
A
ILOAD = 500
μ
A
VOUT = 0 V
fIN = 100 kHz,
70
100
dB
VOH
VOL
ISC
High-level output voltage
6
V
Low-level output voltage
0.3
0.5
V
Output short-circuit current
Gain bandwidth product(1)
1.5
3.5
mA
10 mVPP
1
MHz
CURRENT AMPLIFIER
Input offset voltage
VCM = 0 V,
VCM = 0 V,
VCM = 0 V
2 V
≤
VOUT
≤
6 V
ILOAD = 500
μ
A
ILOAD = 500
μ
A
VOUT = 0 V
TA = 25
°
C
overtemperature
4
0
mV
5.5
0
Input bias current, ISENSE
Open loop gain
500
500
nA
80
110
dB
VOH
VOL
ISC
CMRR
High-level output voltage
8
V
Low-level output voltage
0.3
0.5
Output short-circuit current
1.5
3.5
mA
Common mode rejection range
Gain bandwidth product(1)
0.3
5.0
V
fIN = 100 kHz,
10 mVPP
3
5
MHz
REFERENCE
Output voltage
IREF = 0 mA,
IREF = 0 mA
1 mA
≤
IREF
≤
10 mA
12 V
≤
VCC
≤
18 V
VREF = 0 V
TA = 25
°
C
7.4
7.5
7.6
V
7.35
7.50
7.65
Load regulation
0
8
20
mV
Line regulation
0
14
25
ISC
(1)Ensured by design. Not production tested.
Short circuit current
25
35
60
mA
(2)Gain constant. (K)
I
IAC
VVAO
1.5 V
V
VRMS
2
I
MOUT
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