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PT4452—24V

100-W 30-A Programmable

Isolated DC/DC Converter

Programming Information

VID4=1 VID4=0

VID3 VID2 VID1 VID0

Vout

Vout

1

1

1

1

2.0V

1.30V

1

1

1

0

2.1V

1.35V

1

1

0

1

2.2V

1.40V

1

1

0

0

2.3V

1.45V

1

0

1

1

2.4V

1.50V

1

0

1

0

2.5V

1.55V

1

0

0

1

2.6V

1.60V

1

0

0

0

2.7V

1.65V

0

1

1

1

2.8V

1.70V

0

1

1

0

2.9V

1.75V

0

1

0

1

3.0V

1.80V

0

1

0

0

3.1V

1.85V

0

0

1

1

3.2V

1.90V

0

0

1

0

3.3V

1.95V

0

0

0

1

3.4V

2.00V

0

0

0

0

3.5V

2.05V

Logic 0 = Connect to (–)Remote Sense, pin 20

Logic 1 = Open circuit (no pull-up resistors)

PT4452

Characteristic

Symbol

Conditions

Min

Typ

Max

Units

Output Current

0

—

30

A

Input Voltage Range

18

24

36

VDC

Set Point Voltage Tolerance

—

±1

±1.5

Temperature Variation

–40°

—

±0.5

—

Line Regulation

—

±0.1

±1

Load Regulation

—

±0.2

±1

Total Output Voltage Variation

Includes set-point, line, load,

—

–40°

Efficiency

η

—

89

—

—

87

—

%

—

81

—

20MHz bandwidth

—

55

75

—

45

55

Transient Response

—

N/A

—

µs

—

1

—

—

75

—

µs

—

±5

—

Current Limit Threshold

—

35

—

A

Current Share Tolerance

with PT4495 booster

—

±10

—

%

Over-Voltage Protection

OVP

Shutdown and latch off

—

125

—

Switching Frequency

270

300

350

kHz

Under-Voltage Lockout

UVLO

—

17

—

V

Inhibit (Pin 3)

Input High Voltage

2.5

—

V

Input Low Voltage

–0.5

—

+0.8

Input Low Current

—

–0.2

—

mA

Standby Input Current

pins 3 & 2 connected

—

4

10

mA

Internal Input Capacitance

—3

—µF

External Output Capacitance

0

—

10,000

µF

Isolation Voltage

Input–output/input–case

1500

—

—

V

Capacitance

Input to output

—

1100

—

pF

Resistance

Input to output

10

—

—

M

Ω

Operating Temperature Range

-40

—

°C

Over-Temperature Shutdown

OTP

Case temperature, auto reset

—

120

—

°C

Storage Temperature

—

-40

—

+125

°C

Reliability

MTBF

Per Bellcore TR-332

1.4

—

—

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

Horizontal

—

—G’s

20-2000Hz, pcb mounted

Weight

—

—

—

90

—

grams

Flammability

—

Materials meet UL 94V-0

Notes:

(1) The Inhibit (pin 3) has an internal pull-up, which if left open circuit allows the converter to operate when input power is applied. The open-circuit is

limited to 6.5V. Refer to the application notes for interface considerations.

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

(3) The case pins on through-hole pin configuration (suffix A) must be soldered. For more information see the applicable package outline drawing.