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參數(shù)資料
| 型號： | UCC38C4x |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | BICMOS LOW POWER CURRENT MODE PWM CONTROLLER |
| 中文描述： | BICMOS工藝低功耗電流模式PWM控制器 |
| 文件頁數(shù)： | 4/19頁 |
| 文件大?。?/td> | 296K |
| 代理商： | UCC38C4X |
SLUS458C AUGUST 2001 REVISED SEPTEMBER 2003
4
www.ti.com
electrical characteristics V
DD
= 15 V (See Note 1), R
T
= 10 k
, C
T
= 3.3 nF, C
VDD
= 0.1
μ
F and no load
on the outputs, T
A
= 40
°
C to 105
°
C for the UCC28C4x and T
A
= 0
°
C to 70
°
C for the UCC38C4x,
T
A
= T
J
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Output Section
VOUT low (RDS(on) pull-down)
VOUThigh (RDS(on) pull-up)
Rise tIme
ISINK = 200 mA
ISOURCE = 200 mA
TA = 25
°
C,
TA = 25
°
C,
5.5
15
10
25
CLOAD = 1 nF
CLOAD = 1 nF
25
50
ns
Fall time
20
40
Undervoltage Lockout Section
UCC38C42, UCC38C44
13.5
14.5
15.5
Start threshold
UCC38C43, UCC38C45
7.8
8.4
9.0
UCC38C40, UCC38C41
6.5
7.0
7.5
V
UCC38C42, UCC38C44
8
9
10
Minimum operating voltage
UCC38C43, UCC38C45
7.0
7.6
8.2
UCC38C40, UCC38C41
6.1
6.6
7.1
PWM Section
Maximum duty cycle
UCC38C42, UCC38C43, UCC38C40, VFB < 2.4 V
UCC38C44, UCC38C45, UCC38C41, VFB < 2.4 V
VFB > 2.6 V
94%
96%
47%
48%
Minimum duty cycle
0%
Current Supply Section
Start-up current (ISTART-UP)
Operating supply current (IDD)
NOTE 1: Adjust VDD above the start threshold before setting at 15 V.
VDD = Undervoltage lockout start threshold (0.5 V)
VFB = VCS = 0 V
50
100
μ
A
mA
2.3
3.0
1
2
3
4
8
7
6
5
COMP
FB
CS
RT/CT
VREF
VDD
OUT
GND
PDIP (P) or SOIC (D) PACKAGE
(TOP VIEW)
MSOP (DGK) PACKAGE
(TOP VIEW)
VREF
VDD
OUT
GND
8
7
6
5
1
2
3
4
COMP
FB
CS
RT/CT
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