TOP242-250
Parameter
Conditions
SOURCE = 0 V; TJ = -40 to 125 °C
See Figure 53
Symbol
Min
Typ
Max
Units
(Unless Otherwise Specified)
CONTROL FUNCTIONS (cont.)
IL ≤ IL(DC) or IM ≤ IM(DC)
75
28
78
38
83
50
IL or IM = 190 µA
TOP242-245
IL or IM = 100 µA
Maximum Duty
Cycle
66.5
41.3
66.8
DCMAX
IC = ICD1
%
TOP242-245
IL or IM = 190 µA
TOP246-250
33
60
49.5
73.5
IL or IM = 100 µA
TOP246-250
tSOFT
TJ = 25 °C; DCMIN to DCMAX
IC = 4 mA; TJ = 25 °C
10
15
ms
Soft-Start Time
PWM Gain
DCreg
-28
-23
-18
%/mA
PWM Gain
Temperature Drift
See Note A
-0.01
%/mA/°C
mA
TOP242-245
1.2
1.6
1.7
2.0
2.6
2.7
6.0
6.6
7.3
3.0
4.0
4.2
7.0
8.0
8.5
External Bias
Current
IB
See Figure 7
TOP246-249
TOP250
TOP242-245
TOP246-249
TOP250
CONTROL
Current at 0%
Duty Cycle
IC(OFF)
TJ = 25 °C
mA
Ω
Dynamic
Impedance
IC = 4 mA; TJ = 25 °C
See Figure 51
ZC
10
15
0.18
7
22
Dynamic
Impedance
Temperature Drift
%/°C
kHz
CONTROL Pin
Internal Filter Pole
SHUTDOWN/AUTO-RESTART
VC = 0 V
VC = 5 V
-5.0
-3.0
-3.5
-1.8
-2.0
-0.6
CONTROL Pin
Charging Current
IC(CH)
TJ = 25 °C
mA
Charging Current
Temperature Drift
See Note A
0.5
%/°C
Auto-Restart
VC(AR)U
5.8
V
Upper Threshold
Voltage
Auto-Restart
Lower Threshold
Voltage
VC(AR)L
4.5
0.8
4.8
1.0
5.1
V
V
Auto-Restart
Hysteresis Voltage
VC(AR)hyst
M
34 12/04
POWERINT [ Power Integrations ]
