MP2930 - 4-PHASE PWM CONTROLLER WITH 8-BIT DAC CODE

MP2930 Rev. 1.01

www.MonolithicPower.com

5

10/30/2013

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PIN FUNCTIONS

Pin #

Name

Description

1

ID6

ID inputs from microprocessor. These codes determine output regulation voltage.

2

ID5

3

ID4

4

ID3

5

ID2

6

ID1

7

ID0

8

VRSEL

Select internal ID code. When it is tied to GND, the extended VR10 is selected. When

it’s floated or tied to high, VR11 code is selected.

9

OFS

Offset between REF and DAC program pin. The OFS pin can be used to program a DC

offset current which will generate a DC offset voltage between the REF and DAC pins.

The polarity of the offset is selected by connecting the resistor to GND or VCC. For no

offset, the OFS pin should be left unconnected.

10

DAC

Internal DAC reference output determined by ID codes

11

REF

Error amplifier input. A capacitor 0.1uF is used between REF and GND to smooth the

voltage transition during Dynamic ID operations.

12

COMP

Error amplifier output pin. Tie to compensation network

13

FB

Output voltage feedback pin.

14

IDROOP

Current proportional to load current is flowed out through this pin

15

VDIFF

Remote sense amplifier output. VDIFF-GND=VSEN-RGND

16

RGND

Remote sense amplifier input. Remote output GND

17

VSEN

Remote sense amplifier input. Remote output.

18

SD

Shutdown Intelli-phase @ Hiz state. MP2930 cooperates with MPS Intelli-phase

MP86961 and SD pin is connected to the EN of MP86961.

19

VCC

Power supply. Connect this pin directly to a +5V supply.

20

PWM1

Phase 1 PWM output.

21

ISEN1+

Phase 1 current sense amplifier differential input

22

ISEN1-

23

ISEN4+

Phase 4 current sense amplifier differential input

24

ISEN4-

25

PWM4

Phase 4 PWM output. Connect PWM4 to VCC to configure for 3-phase operation.

26

PWM2

Phase 2 PWM output.

27

ISEN2+

Phase 1 current sense amplifier differential input

28

ISEN2-

29

ISEN3-

Phase 3 current sense amplifier differential input

30

ISEN3+

31

PWM3

Phase 3 PWM output. Connect PWM3 to VCC to configure for 2-phase operation.

32

EN_PWR

Enable pin. It is used to synchronize power-up of the controller and MOSFET driver

ICs.

33

EN_VTT

Enable pin. It is controlled by output of VTT voltage regulator in the mother board.