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17 A, 12-V Input “Big-Hammer II”

Programmable ISR

PT7720 Series

Programming Information

PT7721

PT7722

VID4=1

VID4=0

VID4=1

VID4=0

VID3 VID2 VID1 VID0

Vout

Vout

Vout

Vout

1

1

1

1

2.0V

1.30V

4.5V

6.1V

1

1

1

0

2.1V

1.35V

4.6V

6.2V

1

1

0

1

2.2V

1.40V

4.7V

6.3V

1

1

0

0

2.3V

1.45V

4.8V

6.4V

1

0

1

1

2.4V

1.50V

4.9V

6.5V

1

0

1

0

2.5V

1.55V

5.0V

6.6V

1

0

0

1

2.6V

1.60V

5.1V

6.7V

1

0

0

0

2.7V

1.65V

5.2V

6.8V

0

1

1

1

2.8V

1.70V

5.3V

6.9V

0

1

1

0

2.9V

1.75V

5.4V

7.0V

0

1

0

1

3.0V

1.80V

5.5V

7.1V

0

1

0

0

3.1V

1.85V

5.6V

7.2V

0

0

1

1

3.2V

1.90V

5.7V

7.3V

0

0

1

0

3.3V

1.95V

5.8V

7.4V

0

0

0

1

3.4V

2.00V

5.9V

7.5V

0

0

0

0

3.5V

2.05V

6.0V

7.6V

Logic 0 = Pin 12 potential (remote sense gnd)

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

VID3 and VID4 may not be changed while the unit is operating.

PT7720 SERIES

Characteristics

Symbols

Conditions

Min

Typ

Max

Units

Output Current

= +60°C, 200 LFM, pkg N,

≤5V

—

A

= +25°C, natural convection,

≤5V

—

Output Power

= +60°C, 200 LFM, pkg N,

≥5V

—

—

85

W

= +25°C, natural convection,

≥5V

—

—

85

Input Voltage Range

0.1A

11.0

—

14.0

V

Output Voltage Tolerance

0°C

(PT7721)

—

V

(PT7722)

—

±1

±2

Line Regulation

11V

—

±5

±10

mV

Load Regulation

0.1

—

±5

±10

mV

(PT7721)

—

50

—

mVpp

(PT7722)

—

100

—

Transient Response

—

100

—

µSec

—

200

—

mV

Efficiency

η

—

90

—

—

88

—

%

—

85

—

—

78

—

Switching Frequency

11V

300

350

400

kHz

0.1A

Operating Temperature Range

—0

—

°C

Storage Temperature

—

-40

—

+125

°C

Mechanical Shock

Per Mil-STD-883D, Method 2002.3 , 1 msec,

—

TBD

—

G’s

Half Sine, mounted to a fixture

Mechanical Vibration

Per Mil-STD-883D, Method 2007.2,

—

TBD

—

G’s

20-2000 Hz, Soldered in a PC board

Weight

—

Vertical

—

53

—

grams

Horizontal

—

66

—

Notes: (1) The ISR will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.

(2) The PT7720 series can be easily paralleled with one or more of the PT7748 Current Boosters to provide increased output current in increments of 17A.

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

Output Capacitors:

The PT7720 series requires a minimum output capacitance of 1200µF for proper operation. Do not use Oscon type capacitors. The maximum allow-

able output capacitance is (57,000

÷ Vout)µF, or 15,000µF, whichever is less.

Input Filter:

An input inductor is optional for most applications. The input inductor must be sized to handle 7ADC with a typical value of 1µH. The input capacitance

must be rated for a minimum of 4 Arms of ripple current when operated at maximum output current and maximum output voltage. Contact an applications specialist

for input capacitor selection for applications at other output voltages and output currents.