LNK574
Conditions
SOURCE = 0 V; TJ = -40 to 12ꢀ °C
(Unless Otherwise Specified)
Parameter
Symbol
Min
Typ
Max
Units
Control Functions (cont.)
Minimum Switch
ON-Time
tON(MIN)
IS1
700
200
ns
FeedBack Voltage > VFB
(MOSFET not Switching)
1ꢀ0
200
260
310
DRAIN Supply Current
mA
0.9 V ≤ VFB ≤ 1.70 V
(MOSFET Switching)
IS2
2ꢀ0
ICH1
ICH2
-ꢀ.ꢀ
-3.8
ꢀ.60
-3.8
-2.ꢀ
ꢀ.8ꢀ
-1.8
-1.0
6.10
VBP = 0 V, TJ = 2ꢀ °C
VBP = 4 V, TJ = 2ꢀ °C
BYPASS Pin
Charge Current
mA
BYPASS Pin Voltage
VBP
V
V
BYPASS Pin
Voltage Hysteresis
VBP(H)
0.8
6.1
1.0
6.ꢀ
1.2
6.9
BYPASS Pin
Shunt Voltage
BPSHUNT
V
Circuit Protection
di/dt = 40 mA/ms
TJ = 2ꢀ °C
Current Limit
ILIMIT
I2f
126
166ꢀ
220
136
18ꢀ0
26ꢀ
146
mA
A2Hz
ns
di/dt = 40 mA/ms
TJ = 2ꢀ °C
Power Coefficient
2091
Leading Edge
Blanking Time
tLEB
TJ = 2ꢀ °C
BYPASS Pin Shutdown
Threshold Current
VBP = BPSHUNT
See Note E
ISD
ꢀ.0
6.ꢀ
8.0
mA
Thermal Shutdown
Temperature
TSD
See Note B
See Note B
13ꢀ
142
70
1ꢀ0
°C
°C
Thermal Shutdown
Hysteresis
TSD(H)
Power Down (PD) Mode
TJ = 2ꢀ °C,
VDRAIN = 32ꢀ V
See Figure 23
Off-State Drain Leakage
in Power Down Mode
IDSS(PD)
6.ꢀ
8.ꢀ
9
mA
BYPASS Pin Overvoltage
Protection in Power
Down Mode
IBP = 300 mA
TJ ≤ 100 °C
VBP(PDP)
7.2ꢀ
1.ꢀ
10.9
V
BYPASS Pin Power Up
Reset Threshold (in
Power Down Mode or at
Power Supply Start-up)
VBP(PU)
3
4
V
8
Rev. B 12/07/10
www.powerint.com
POWERINT [ Power Integrations ]
