LNK501
Conditions
(Unless Otherwise Specified)
SOURCE = 0 V; TJ = -40 °C to 125 °C
See Figure 12
Parameter
Symbol
Min
Typ Max
Units
SHUTDOWN/AUTO-RESTART
VC = 0 V
-4.5
-2.3
0.95
0.7
-3.25
-1.3
1.06
0.9
-2
CONTROL Pin
IC(CH)
mA
mA
TJ = 25 °C
Charging Current
VC = 5.15 V
-0.3
1.14
1.1
ICD1
Output MOSFET Enabled
Output MOSFET Disabled
Control/Supply/
Discharge Current
ICD2
Auto-restart
5.6
VC(AR)
V
V
Threshold Voltage
Auto-restart
Hysteresis Voltage
0.9
8
VC(AR)hyst
Short circuit applied at
power supply output
Auto-restart
Duty Cycle
%
DC(AR)
Auto-restart
Frequency
Short circuit applied at power supply
output, C1 = 0.22 µF (See Figure 12)
300
Hz
f(AR)
CIRCUIT PROTECTION
TJ = 25°C
di/dt = 90 mA/µs
See Note C
Self-protection
ILIM
mA
241
254
267
Current Limit
TJ = 25°C
di/dt = 90 mA/µs
See Notes C, D
I2 f
I2 f Coefficient
A2Hz
2547
2710
2873
TJ = 25°C
IC = ICD1
Current Limit at
Auto-restart
ILIM(AR)
mA
V
158
2.75
300
100
135
70
Power Up Reset
Threshold Voltage
VC(RESET)
tLEB
1.5
4.0
TJ = 25°C
IC = IDCT
Leading Edge
Blanking Time
ns
ns
200
Current Limit
Delay
tIL(D)
TJ = 25°C
Thermal Shutdown
Temperature
IC = IDCT
125
°C
°C
Thermal Shutdown
Hysteresis
F
9/02
12
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