MPX2003

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

MPX2003 Rev. 1.0

MonolithicPower.com

4

8/5/2022

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2022 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

Name

Description

TSOICW16-15 SOICW-16

1

1

HV

High voltage. The HV pin implements an internal, high-voltage current

source for the primary IC’s start-up sequence and normal operation. HV

samples the input voltage for brown-in/brownout protection and provides

line compensation on the primary peak current.

-

2

NC

No connection.

3

3

PEP

External protection on the primary IC. The PEP pin provides external

protections. Protections include but are not limited to over-temperature

protection (OTP) for the primary MOSFET and over-voltage protection

(OVP) on the auxiliary winding. An internal current source allows for a

direct connection between the external protection circuit and the PEP pin.

4

4

PGND Ground of the primary-side IC.

5

5

VCC

Power supply for the primary IC operation. The VCC pin senses the

output voltage (VOUT) indirectly to provide over-voltage protection (OVP).

6

6

PDRV Output drive for the primary-side external power MOSFET.

7

7

CS

Primary MOSFET current sense for peak current mode regulation and

SCP. The CS pin implements over-power compensation based on the HV

voltage.

8

8

PGND Ground of the primary-side IC.

9

9

SDRV Output drive for the secondary-side external power MOSFET.

10

10

SRD

Voltage-sense drain of the synchronous rectifier MOSFET. The

voltage on the SRD pin controls the SR drive and QR operation. This pin

can also supply power to VDD.

11

11

SGND Ground of the secondary side IC.

12

12

COMP

Internal error amplifier for output voltage regulation. Connect the

compensation network to the COMP pin to adjust the regulating

performance. COMP can be configured as an external compensation

network. The COMP voltage can be monitored for secondary overload

protection (SOLP).

13

13

VDD

Power supply for the secondary IC operation.

14

14

FB

Feedback for constant voltage regulation. Connect FB to a resistor

divider to sense VOUT. FB can be reused to achieve output OVP and OLP.

15

15

IS

Output current sense. IS senses the output current (IOUT) when a current-

sense resistor is connected to the output loop. This also provides accurate

overload protection (OLP). In addition, the IS voltage can be used for cable

drop compensation.

16

16

SGND Ground of the secondary side IC.