TOP242-249
ABSOLUTE MAXIMUM RATINGS(1)
LINE SENSE Pin Voltage ................................ -0.3 to 9 V
CURRENT LIMIT Pin Voltage ..................... -0.3 to 4.5 V
MULTI-FUNCTION Pin Voltage .................... -0.3 to 9 V
FREQUENCY Pin Voltage............................... -0.3 to 9 V
Storage Temperature ..................................... -65 to 150 °C
Operating Junction Temperature (2) ............... -40 to 150 °C
Lead Temperature (3) ............................................... 260 °C
DRAIN Voltage ............................................ -0.3 to 700 V
DRAIN Peak Current: TOP242 ...............................0.72 A
TOP243 ...............................1.44 A
TOP244 ...............................2.16 A
TOP245 ...............................2.88 A
TOP246 ...............................4.32 A
TOP247 ...............................5.76 A
TOP248 ...............................7.20 A
TOP249 ...............................8.64 A
Notes:
1. All voltages referenced to SOURCE, TA = 25 °C.
2. Normally limited by internal circuitry.
3. 1/16" from case for 5 seconds.
CONTROL Voltage .......................................... -0.3 to 9 V
CONTROL Current ...............................................100 mA
THERMAL IMPEDANCE
Thermal Impedance: Y Package (θJA)(1) ............... 70 °C/W
Notes:
(θJC)(2) ................ 2 °C/W
1. Free standing with no heatsink.
2. Measured at the back surface of tab.
3. Soldered to 0.36 sq. inch (232 mm2), 2oz. (610 gm/m2) copper clad.
4. Soldered to 1 sq. inch (645 mm2), 2oz. (610 gm/m2) copper clad.
5. Measured on the SOURCE pin close to plastic interface.
P or G Package:
(θJA) ...... 45 °C/W (3); 35 °C/W (4)
(θJC)(5) ......................... 11 °C/W
Conditions
(Unless Otherwise Specified)
See Figure 53
Parameter
Symbol
Min
Typ Max
Units
SOURCE = 0 V; TJ = -40 to 125 °C
CONTROL FUNCTIONS
FREQUENCY Pin
124
132
66
140
Switching
IC = 3 mA;
TJ = 25 °C
Connected to SOURCE
fOSC
Frequency
kHz
FREQUENCY Pin
Connected to CONTROL
61.5
70.5
(average)
Duty Cycle at
DC(ONSET)
ONSET of Fre-
10
30
%
quency Reduction
Switching
Frequency near
0% Duty Cycle
132 kHz Operation
66 kHz Operation
fOSC (DMIN)
kHz
15
4
132 kHz Operation
66 kHz Operation
Frequency Jitter
Deviation
∆f
kHz
Hz
2
Frequency Jitter
Modulation Rate
fM
250
IL ≤ IL (DC) or IM ≤ IM(DC)
IL or IM = 190 µA
75
28
78
38
83
50
Maximum Duty
Cycle
IC = ICD1
DCMAX
tSOFT
%
ms
TJ = 25 °C; DCMIN to DCMAX
10
15
Soft Start Time
E
7/01
August 8, 2000
34
POWERINT [ Power Integrations ]
