MPX2003

– UP TO 140kHz ALL-IN-ONE FLYBACK CONTROLLER

MPX2003 Rev. 1.0

MonolithicPower.com

7

8/5/2022

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© 2022 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS (continued)

Typical values tested at TJ = -40°C to +125°C, unless otherwise noted.

Parameter

Symbol

Condition

Min

Typ

Max

Units

Maximum switching

frequency

fSW-MAX

110

kHz

Maximum on time

tON-MAX

6.5

µs

Minimum off time

tOFF-MIN

1000

ns

Time to trigger primary OCP

tOCP

45

55

68

ms

Minimal switching frequency

during soft start

fSW-SOFT

10

kHz

Primary Side (CS)

Soft-start duration

tSOFT

9.6

ms

Threshold for SCP

VSCP

0.595

0.635

0.675

V

Second SCP blanking time

tSCP2

90

µs

Maximum peak current

limitation

VIPK-MAX

0.384

0.4

0.416

V

Minimum peak current

limitation

VIPK-MIN

0.1

V

Jittering amplitude

∆VIPK

VIPK = VIPK-MAX

±2.9%

VIPK-MAX

Jittering period (5)

256

cycles

fSW at which IPK foldback

begins

fSW-H

60

kHz

Slope of the compensation

ramp

SRAMP

25

mV/µs

LEB for current limitation

tLEB-L

400

ns

LEB for SCP

tLEB-S

250

ns

∆IHVCS / ∆VHV Ratio

KHVCS

0.53

µA/V

CS sourcing current

IHVCS

VHV = 200V, VIPK = VIPK-MAX,

TJ = 25°C

36

µA

VHV = 375V, VIPK = VIPK-MAX,

TJ = 25°C

100

126

152

VIPK (below which line

compensation completely

removed) (5)

VLC-END

0.15

V

Detection time for CS short

tSSP

3

4.5

6

µs

Threshold for CS short

VCSS

During the soft-start period

50

mV

Primary Side (PEP)

Sourcing current from PEP

IPEP

VPEP = 0.5V

110

µA

Protection trigger threshold

VPEP-T

0.425

0.5

0.575

V

Protection trigger delay

tPEP-T

300

µs