LNK500
ABSOLUTE MAXIMUM RATINGS(1,4)
Notes:
DRAIN Voltage ........................................ -0.3 V to 700 V
DRAIN Peak Current .............................................400 mA
CONTROL Voltage ..................................... - 0.3 V to 9 V
CONTROL Current (not to exceed 9 V)................100 mA
Storage Temperature ................................-65 °C to 150 °C
Operating Junction Temperature(2) ...........-40 °C to 150 °C
Lead Temperature(3) ................................................ 260 °C
1. All voltages referenced to SOURCE, TA = 25 °C.
2. Normally limited by internal circuitry.
3. 1/16" from case for 5 seconds.
4. Maximum ratings specified may be applied, one at a time,
without causing permanent damage to the product.
Exposure to Absolute Maximum Rating conditions for
extended periods of time may affect product reliability.
THERMAL IMPEDANCE
Notes:
Thermal Impedance: P/G Package:
(θJA) .............. 70 °C/W(2), 55 °C/W(3)
(θJC)(1) ................................. 11 °C/W
1. Measured on the SOURCE pin close to plastic interface.
2. Soldered to 0.36 sq. inch (232 mm2), 2 oz. (610 gm/m2) copper clad.
3. Soldered to 1 sq. inch (645 mm2). 2 oz. (610 gm/m2) copper
clad.
Conditions
(Unless Otherwise Specified)
SOURCE = 0 V; TJ = -40 °C to 125 °C
See Figure 12
Parameter
Symbol
Min
Typ Max
Units
CONTROL FUNCTIONS
Switching
fOSC
IC = IDCT, TJ = 25 °C
34.5
24
42
30
49.5
36
kHz
kHz
Frequency
Duty Cycle = DCLF
Low Switching
Frequency
fOSC(LOW)
TJ = 25 °C
Duty Cycle at
Low Switching
Frequency
Frequency Switching from fOSC to
DCLF
2.4
3.8
5.2
%
%
fOSC(LOW), TJ = 25 °C
Low Frequency
Duty Cycle Range
Frequency = fOSC(LOW), TJ = 25 °C
1.8
74
3.15
77
4.5
80
DC(RANGE)
Maximum
Duty Cycle
%
DCMAX
IC = 1.5 mA
PWM
Gain
%/µA
DCREG
IC = IDCT, TJ = 25 °C
-0.45
-0.35
-0.25
CONTROL Pin
Current at 30%
Duty Cycle
TJ = 25 °C
See Figure 4
IDCT
2.21
2.30
2.39
mA
CONTROL Pin
Voltage
5.5
60
5.75
90
6
V
VC(IDCT)
IC = IDCT
Dynamic
Impedance
ZC
120
Ω
IC = IDCT, TJ = 25 °C
B
3/03
11