TOP243Y datasheet(34/48 Pages) POWERINT

34 / 48 page

TOP242-249

7/01

August 8, 2000

ABSOLUTE MAXIMUM RATINGS(1)

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

CONTROL Voltage .......................................... -0.3 to 9 V

CONTROL Current ............................................... 100 mA

C = 3 mA;

J = 25 °C

C =

CD1

OSC

(ONSET

)

OSC (DMIN)

∆f

MAX

SOFT

CONTROL FUNCTIONS

Conditions

(Unless Otherwise Specified)

See Figure 53

SOURCE = 0 V

; T

J = -40 to 125 °C

Min

Typ

Max

Parameter

Symbol

Units

THERMAL IMPEDANCE

kHz

Thermal Impedance: Y Package (

JA)

(1) ............... 70

°C/W

(

JC)

(2) ................ 2

°C/W

P or G Package:

(

JA) ...... 45 °C/W

(3); 35

°C/W (4)

(

JC)

(5) ......................... 11

°C/W

Notes:

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.

124

132

140

61.5

70.5

± 4

± 2

250

FREQUENCY Pin

Connected to SOURCE

FREQUENCY Pin

Connected to CONTROL

132 kHz Operation

66 kHz Operation

L ≤ IL (DC) or IM ≤ IM(DC)

L or IM = 190 µA

J = 25 °C; DCMIN to DCMAX

Switching

Frequency

(average)

Duty Cycle at

ONSET of Fre-

quency Reduction

Switching

Frequency near

0% Duty Cycle

Frequency Jitter

Deviation

Frequency Jitter

Modulation Rate

Maximum Duty

Cycle

Soft Start Time

132 kHz Operation

66 kHz Operation

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

Notes:

1. All voltages referenced to SOURCE, T

A = 25 °C.

2. Normally limited by internal circuitry.

3. 1/16" from case for 5 seconds.

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