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PT4240 Series

10-W Low-Profile 24V-Input

Isolated DC/DC Converter

PT4240 SERIES

Characteristic

Symbol

Conditions

Min

Typ

Max

Units

Output Current

—3

—2

—

0.85

Input Voltage Range

18.0

24.0

36.0

VDC

Set Point Voltage Tolerance

—

Temperature Variation

–40°

—

±0.2

—

Line Regulation

—

±1

—

mV

Load Regulation

—

±5

—

mV

Total Output Voltage Variation

Includes set-point, line, load,

—

±1.5

±3

–40°

Efficiency

η

—

86

—

—

84

—

—

80

—

—

77

—

%

—

72

—

—

70

—

—

64

—

20MHz bandwidth

—

50

—

—

100

—

Transient Response

—

75

—

µs

—

±150

—

mV

—

±350

—

Output Voltage Adjust

±10

—

—

Current Limit Threshold

—

150

—

Switching Frequency

250

300

350

kHz

Under-Voltage Lockout

UVLO

—

16

—

V

Remote On/Off (Pin 1)

Referenced to –Vin (pin 3)

Input High Voltage

4.5

—

V

Input Low Voltage

–0.2

—

+0.8

Input Low Current

—

–0.5

—

mA

Standby Input Current

pins 1 & 3 connected

—

1

—

mA

Internal Input Capacitance

—

0.66

—

µF

External Output Capacitance

—

1000

µF

—

330

Isolation Voltage

Input–output/input–case

1500

—

—

V

Capacitance

Input to output

—

1,100

—

pF

Resistance

Input to output

10

—

—

M

Ω

Operating Temperature Range

-40

—

°C

Storage Temperature

—

-40

—

+125

°C

Reliability

MTBF

Per Bellcore TR-332

4.7

—

—

Mechanical Shock

—

Per Mil-Std-883D, method 2002.3,

—

500

—

G’s

1mS, half-sine, mounted to a fixture

Mechanical Vibration

—

Mil-Std-883D, Method 2007.2

—

—G’s

20-2000Hz, all case styles soldered to PC

Weight

—

—

—

20

—

grams

Flammability

—

Materials meet UL 94V-0

Notes:

(1) The DC/DC converter will operate at no load with reduced specifications.

(2) The maximum output current reduces the output power of the following devices to less than 10W:-

PT4245 =7.5W; PT4241 =5.4W; PT4246 =4.5W; PT4247 =3.9W.

(3) The Remote On/Off (pin 1) has an internal pull-up, and if it is left open circuit the converter will operate when input power is applied. The open-circuit

voltage is typically 5V. Refer to the application notes for interface considerations.

(4) See Safe Operating Area curves or contact the factory for the appropriate derating.

(5) An output capacitor is not required for proper operation.

(6) The case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package outline drawing.

Not Recommended For New Designs