TYPICAL CHARACTERISTICS

SYNC AND INHIBIT

RECOMMENDED OPERATING CONDITIONS

ABSOLUTE MAXIMUM RATINGS

B6-10

LCM-120

120 WATT

INPUT VOLTAGE

LCM-120

PARAMETERS

CONDITIONS

AS A CONDITION

MIN

TYP

MAX

UNITS

OUTPUT VOLTAGE

12 TO 24

23

24

24.5

CONTINUOUS

24 TO 36

—

—

VDC

36 TO 50

35

36

37.5

TRANSIENT 120 ms MAX

50 TO 80

—

36

—

V

OUTPUT POWER

12 TO 50

—

—

120

W

OUTPUT RIPPLE

FULL LOAD

12 TO 24

—

150

—

BW = 1O kHz TO 2 MHz

24 TO 36

—

50

—

mV p-p

36 to 50

—

1500

—

INPUT VOLTAGE

CONTINUOUS

12

28

50

VDC

TRANSIENT 120 ms

—

—

80

INPUT CURRENT

12

—

125

160

NO LOAD

24

—

50

85

36

—

20

—

mA

INHIBITED, PIN 11 = 0 V

12

—

50

—

24

—

24

—

36

—

18

—

INPUT RIPPLE

FULL LOAD

—

—

150

—

mA p-p

BW = 10 kHz TO 10 MHz

EFFICIENCY

12

—

88

—

FULL LOAD

24

—

95

—

%

36

—

90

—

INHIBIT CURRENT

INHIBITED, PIN 11 = 0 VDC

12 TO 80

—

1

—

mA

POWER FAIL FLAG

< 9.5

—

0.4, PIN 9

—

VDC

FLAG CURRENT = 0.4 mA

POWER FAIL

—

9.5

10

VDC

THRESHOLD V

UNDERVOLTAGE

—

11.5

12

VDC

LOCKOUT

OUTPUT

ESR > 0.25 OHMS

330

—

1,000,000

µF

CAPACITOR

Input Voltage Range

• 12 to 50 VDC continuous

• 80 V for 120 msec transient

Case Operating Temperature (Tc)

• –55°C to +125°C full power

• –65°C to +135°C absolute

Derating Output Power/Current

• Derate linearly from 100% at 125°C to 0% at 135°C

Output Voltage Temperature Coefficient

• 0.01%/°C, typical

Isolation: Any pin to case

• 100 megohm minimum at 500 V

Conversion Frequency

• Free run mode 600 kHz, typical

• External sync range 550 to 650 kHz

Inhibit Pin Voltage (unit enabled)

• 10 V typical

Input Voltage Range

• 12 to 50 continuous

Output Power

• 120 watts

Lead Soldering Temperature (10 sec per lead)

• 300°C

Storage Temperature Range (Case)

• –65°C to +150°C

Sync (550 to 650 kHz.)

• Duty cycle 40% to 60%

• Logic low 0.8V, max

• Logic high 4.5 V, min

• Referenced to input common

• If sync is not used, leave unconnected

Inhibit: TTL Open Collector

• Logic low (output disabled)

Logic low voltage 1.3 V max

• Referenced to input common

• Logic high (output enabled)

Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.