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)： 5/16頁
文件大?。?/td> 455K
代理商： UC2854BL
SLUS329B JUNE 1998 REVISED FEBRUARY 2005
5
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
OSCILLATOR
Initial accuracy
TA = 25
°
C
12 V
≤
VCC
≤
18 V
Line, temperature
85
100
115
kHz
Voltage stability
1%
Total variation
80
120
kHz
Ramp amplitude (peak-to-peak)
4.9
5.9
V
Ramp valley voltage
0.8
1.3
ENABLE/SOFT-START/CURRENT LIMIT
Enable threshold voltage
2.35
2.55
2.80
V
Enable hysteresis
VFAULT = 2.5 V
VENA = 0 V
Enable overdrive = 100 mV
500
600
mV
μ
A
ns
Enable input bias current
Propagation delay to disable time(1)
2
5
300
Soft-start charge current
VSS = 2.5 V
10
14
24
Peak limit offset voltage
15
15
mV
μ
A
ns
Peak limit input current
Peak limit propagation delay time(1)
VPKLMT = 0.1 V
200
100
150
MULTIPLIER
Output current, IAC limited
IAC = 100
μ
A,
RSET = 10 k
IAC = 0
μ
A,
VRMS = 1.5 V,
VRMS = 1.5 V,
VRMS = 1.5 V,
VRMS = 5 V,
VRMS = 5 V,
VRMS = 1.5 V, Va = 6V, TA = 25
°
C
VRMS = 1 V,
220
200
170
Output current, zero
RSET = 10 k
Va = 6 V
2.0
0.2
2.0
μ
A
Output current, power limited
230
200
170
Va = 2 V
22
μ
A
Output current
Va = 5 V
156
Va = 2 V
2
μ
A
Va = 5 V
14
Gain constant(2)
1.1
1.0
0.9
A/A
GATE DRIVER
VOH
VOL
High-level output voltage
IOUT = 200 mA,
IOUT = 200 mA
IOUT = 10 mA
IOUT = 50 mA,
CLOAD = 1 nF
CLOAD = 1 nF
CLOAD = 10 nF
VCC = 15 V
12.0
12.8
V
Low-level output voltage
1.0
2.2
300
500
mV
Low-level UVLO voltage
Output rise time(1)
Output fall time(1)
Output peak current(1)
VCC = 0 V
0.9
1.5
V
35
ns
35
1.0
A
(1)Ensured by design. Not production tested.
(2)Gain constant. (K)
I
IAC
VVAO
1.5 V
V
VRMS
2
I
MOUT
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