参数资料
型号: TOP242FN-TL
厂商: POWER INTEGRATIONS INC
元件分类: 稳压器
英文描述: 0.72 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PZIP6
封装: LEAD FREE, PLASTIC, TO-262, 7/6 PIN
文件页数: 28/52页
文件大小: 2175K
代理商: TOP242FN-TL
TOP242-250
N
4/05
34
Parameter
Symbol
Conditions
SOURCE = 0 V; T
J = -40 to 125 °C
See Figure 53
(Unless Otherwise Specied)
Min
Typ
Max
Units
CONTROL FUNCTIONS (cont.)
Maximum Duty
Cycle
DC
MAX
I
C = ICD1
I
L ≤ IL(DC) or IM ≤ IM(DC)
75
78
83
%
I
L or IM = 190 A
TOP242-247
28
38
50
I
L or IM = 100 A
TOP242-247
66.5
I
L = 190 A
TOP248-250
33
41.3
49.5
I
L = 100 A
TOP248-250
60
66.8
73.5
Soft-Start Time
t
SOFT
T
J = 25 °C; DCMIN to DCMAX
10
15
ms
PWM Gain
DC
reg
I
C = 4 mA; TJ = 25 °C
-28
-23
-18
%/mA
PWM Gain
Temperature Drift
See Note A
-0.01
%/mA/°C
External Bias
Current
I
B
See Figure 7
TOP242-245
1.2
2.0
3.0
mA
TOP246-249
1.6
2.6
4.0
TOP250
1.7
2.7
4.2
CONTROL
Current at 0%
Duty Cycle
I
C(OFF)
T
J = 25 °C
TOP242-245
6.0
7.0
mA
TOP246-249
6.6
8.0
TOP250
7.3
8.5
Dynamic
Impedance
Z
C
I
C = 4 mA; TJ = 25 °C
See Figure 51
10
15
22
Dynamic
Impedance
Temperature Drift
0.18
%/°C
CONTROL Pin
Internal Filter Pole
7
kHz
SHUTDOWN/AUTO-RESTART
CONTROL Pin
Charging Current
I
C(CH)
T
J = 25 °C
V
C = 0 V
-5.0
-3.5
-2.0
mA
V
C = 5 V
-3.0
-1.8
-0.6
Charging Current
Temperature Drift
See Note A
0.5
%/°C
Auto-Restart
Upper Threshold
Voltage
V
C(AR)U
5.8
V
Auto-Restart
Lower Threshold
Voltage
V
C(AR)L
4.5
4.8
5.1
V
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