Electrical Specification

10.0 V, 25 A / 250 W

PKB4217ND

TP1 = -40 to +95ºC, VI = 36 to 75 V, unless otherwise specified under Conditions.

Typical values given at: TP1 = +25°C, VI= 53 V, max IO, unless otherwise specified under Conditions.

Additional Cin = 100 µF, Cout = 100 µF. See Operating Information section for selection of capacitor types.

Characteristics

Conditions

min

typ

max

Unit

VI

Input voltage range

36

75

V

VIoff

Turn-off input voltage

Decreasing input voltage

32

33

34

V

VIon

Turn-on input voltage

Increasing input voltage

34

35

36

V

CI

Internal input capacitance

VI = 53 V

9

μF

PO

Output power

0

250

W

η

Efficiency

50% of max IO

95.5

%

max IO

95.2

50% of max IO, VI = 48 V

95.7

max IO, VI = 48 V

95.3

Pd

Power Dissipation

max IO

12.5

16.5

W

Pli

Input idling power

IO = 0 A, VI = 53 V

2.9

W

PRC

Input standby power

VI = 53 V (turned off with RC)

1

W

fs

Switching frequency

0-100 % of max IO

390

415

440

kHz

VOi

Output voltage initial setting and

accuracy

TP1 = +25°C, VI = 53 V, IO = 25 A

9.80

10

10.20

V

Output voltage tolerance band

0-100% of max IO, VI = 36-75 V

9.70

10.30

V

Idling voltage

IO = 0 A, VI = 36-75 V

9.70

10.30

V

Line regulation

VI = 36-75 V, max IO

2

40

mV

Load regulation

VI = 53 V, 0-100% of max IO

2

30

mV

Vtr

Load transient

voltage deviation

VI = 53 V, Load step 25-75-25% of

max IO, di/dt = 1 A/

μs, CO = 1 mF

±230

365

mV

ttr

Load transient recovery time

25

150

µs

tr

Ramp-up time

(from 10−90% of VOi)

10-100% of max IO

12

18

ms

ts

Start-up time

(from VI connection to 90% of VOi)

17

22

ms

tRC

RC start-up time

(from VRC connection to 90% of VOi)

max IO

17

25

ms

RC

Sink current, see Note 1

See operating information

0.5

mA

Trigger level

Decreasing / Increasing RC-voltage

1.5 / 2.5

V

Response time

0.1

0.5

ms

IO

Output current

0

25

A

Ilim

Current limit threshold

TP1 < max TP1

27.5

32

38

A

Isc

Short circuit current

TP1 = 25ºC, see Note 2

5

A

Cout

Recommended Capacitive Load

TP1 = 25ºC, see Note 3

100

10000

µF

VOac

Output ripple & noise

See ripple & noise section, VOi

50

150

mVp-p

OVP

Over voltage protection

TP1 = +25°C, VI = 53 V,

50% of max IO

12.2

V

Note 1: Sink current drawn by external device connected to the RC pin

Note 2: RMS current at OCP in hiccup mode

Note 3:. Low ESR value

PKB4000D series Fully regulated DC-DC Converters

Input 36-75 V, Output up to 25 A / 300 W

28701-BMR674 01 Rev G

July 2019

© Flex

Technical Specification

13