TYPICAL CHARACTERISTICS

SYNC AND INHIBIT (INH1, INH2)

RECOMMENDED OPERATING CONDITIONS

ABSOLUTE MAXIMUM RATINGS

Input Voltage

• 160 to 400 VDC

Output Power

• 50 to 65 watts depending on model

Lead Soldering Temperature (10 sec)

• 300°C

Storage Temperature Range (Case)

• –65°C to +150°C

MHP270 SERIES

65 WATT

Output Voltage Temperature Coefficient

• 100 ppm/°C typical

Isolation

• 100 megohm minimum at 500 V

Conversion Frequency

• Free run mode 600 kHz typical

525 kHz. min., 675 kHz max

• External sync range: 525 to 675 kHz

Inhibit Pin Voltage (unit enabled)

• INH1 =12 V typ., INH2 = 5 V typ

Low Line Drop Out - Vout drops 50 mv

• Input voltage 155 VDC max

Undervoltage Lockout

• Input voltage 110 VDC min

Current Limit

• 125% of full load typical

Input Voltage Range

• 160 to 400 VDC continuous

• 450 VDC for 50 msec transient

Case Operating Temperature (Tc)

• –55 to +100°C full power

Electrical Characteristics: 25°C Tc, 270 VDC Vin, 100% load, free run, unless otherwise specified.

Sync In (525 to 675 kHz)

• Duty cycle 40% min, 60% max

• Logic low 0.8 V max

• Logic high 4.5 V min

• If not used, connect to input common

• Referenced to input common

Sync Out - Referenced to input common

Inhibit (INH1, INH2) TTL Open Collector

• Logic low (output disabled)

INH1 referenced to input common

Logic low 0.8 V max

INH2 referenced to output common

Logic low 0.5 V max

• Logic high (output enabled)

Open collector

Notes

1. Unit will shut down above approximately 425V but will be undamaged

and will restart when voltage drops into normal range.

2. Indefinite short circuit protection not guaranteed above 100°C case.

3. Recovery time is measured from application of the transient to point at

which Vout is within 1% of final value.

SINGLE OUTPUT MODELS

MHP27005S

MHP27012S

MHP27015S

MHP27028S

PARAMETER

CONDITION

MIN

TYP MAX

MIN

TYP MAX

MIN

TYP MAX

MIN

TYP MAX

UNITS

OUTPUT VOLTAGE

4.95

5.00 5.05

11.88 12.00 12.12

14.85 15.00 15.15

27.22 28.00 28.28

VDC

OUTPUT CURRENT

0

—

10

0

—

5

0

—

4.33

0

—

2.32

A

OUTPUT POWER

0

—

50

0

—

60

0

—

65

0

—

65

W

OUTPUT RIPPLE

VOLTAGE

10 kHz - 2 MHz

—

—

50

—

—

50

—

—

75

—

—

280

mV p-p

LINE REGULATION

—

—

50

—

—

120

—

—

150

—

—

280

mV

LOAD REGULATION

NO LOAD TO FULL

—

—

50

—

—

120

—

—

150

—

—

280

mV

INPUT VOLTAGE

CONTINUOUS

160

270

400

160

270

400

160

270

400

160

270

400

VDC

—

—

450

—

—

450

—

—

450

—

—

450

V

INPUT CURRENT

NO LOAD

—

—

20

—

—

20

—

—

20

—

—

20

mA

INHIBITED - INH1

—

—

8

—

—

10

—

—

7

—

—

10

mA

INHIBITED - INH2

—

—

15

—

—

15

—

—

15

—

—

15

INPUT RIPPLE

CURRENT

10 kHz - 10 MHz

—

—

50

—

—

50

—

—

45

—

—

50

mA p-p

EFFICIENCY

76

—

—

81

—

—

80

—

—

80

—

—

%

POWER DISSIPATION

SHORT CIRCUIT

—

—

19

—

—

19

—

—

19

—

—

23

W

—

—

1.5

—

—

1.5

—

—

1.0

—

—

1.0

VDC

STEP LOAD RESP.

50% – 100% – 50%

TRANSIENT

—

—

300

—

—

700

—

—

700

—

—

1800

mV pk

—

—

300

—

—

500

—

—

300

—

—

1000

µs

PINS NOT IN USE

Inhibit (INH1, INH2)

Sync Out

Sync In

Share

Sense Lines

No connection

No connection

Connect to input common

Connect to output common

Must be connected to

appropriate outputs

2