NCP5331FTR2

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P30 P31-P33 P34-P36

NCP5331

http://onsemi.com

10

Figure 2. Block Diagram, Control Functions

+

−

V

ID0

V

ID1

V

ID2

V

ID3

V

ID4

5−Bit DAC

OUT

11111

5.0 V

REF

V

CCL

5.0 V

REF

V

FB

Current

Gen

R

OSC

OSC

LGND

CS

REF

PH1

PH2

−

+

Error Amp

COMP

11111

Shutdown

V

FB_BIAS

−

+

CS1

CS2

G

CSA1

2.0

G

CSA2

2.0

G

VDRP

2.0

SU Offset

0.6 V

+

RAMP1

+

RAMP2

V

DRP

Delay

10 s

−SEN

DAC Out

OSC

IBIAS

+

+

I

TOTAL

PH1 Current

PH2 Current

V

FFB

100 k

5.0 V

REF

− +

−

+

+

−

PWMC1

S

R

RESET

Dominant

Q

Q

D

F/F

Non−Overlap

Gate Driver

PH1

V

CCH

GH1

V

CCL1

GL1

GND1

S

R

RESET

Dominant

Q

Q

D

F/F

Non−Overlap

Gate Driver

PH2

GH2

V

CCL2

GL2

GND2

PWMC2

Fault

COMP_LO

DAC Out

−

+

12.5% of

DAC

+ −

CS

REF

PGD

Comparator

C

PGD

7.5 A

PGD No Delay 1 = ON

+

−

+ −

3.0 V/0.5 V

EXT Delay

5.0 V

REF

15 A

Int. Delay

200 s

PGD

PGDUVLO

Over

Over

Fault

7.5 A

1 = ON

COMP

Discharge

NCP5331

http://onsemi.com

11

Figure 3. Block Diagram, Protection

+

−

CS

REF

G

ILIM

6.0

−

+

−

+

Slew

Rate

Limit

I

LIM

Current Limit

V

CCL

Fault

V

CCL

+

−

Start

Stop

8.50 V

6.15 V

−

+

V

CCH

Fault

V

CCH

+

−

Start

Stop

8.50 V

6.75 V

S

R

SET

Dominant

Q

Q

D

F/F

5.0 A

2.05 V/0.75 V

External Crowbar

+

−

+

−

2.0V

Internal Crowbar

Overvoltage

Overcurrent

S

R

RESET

Dominant

Q

Q

D

F/F

Over

UVLO

Overcurrent

and

Overvoltage

Latch

+

−

+

−

3.0V

OVC Timer

5.0 V

REF

PGD

I

TOTAL

UVLO

Overcurrent

UVLO

S

R

SET

Dominant

Q

Q

D

F/F

Fault Latch

Fault

11111 Shutdown

−

+

COMP Reset

COMP

+

−

COMP_LO

0.27 V

COMP Discharge

Threshold

5 V

SB

CB

OUT

C

OVC

NCP5331

http://onsemi.com

12

+

−

5.0 V

25 A

1.65 V

V

ID0

−V

ID4

Figure 4. Simplified VID Pin Input Circuitry

0.65 V

NCP5331

Controller

Hi or Lo

TYPICAL PERFORMANCE CHARACTERISTICS

Figure 5. Oscillator Frequency vs. R

OSC

Value Figure 6. V

FB

Current vs. R

OSC

Value

10

V

FB

Bias Current, A

0

R

OSC

Value, k

5

10

15

20

25

20

30 40 50 60 70 8010

Frequency (kHz)

100

R

OSC

(k)

300

350

400

450

500

550

600

20 30 40 50 70

150

200

250

60

Maximum Frequency (kHz)

200

V

CORE

(V)

300

350

400

450

500

550

600

250

0.800

0.850

0.900

0.950

1.000

1.050

1.100

1.150

1.200

1.250

1.300

1.350

1.400

1.450

1.500

1.550

V

SOURCE

= 12 V

Minimum NCP5331

Pulse Width = 280 ns

Figure 7. Maximum Frequency vs. V

CORE

650

V

SOURCE

= 5 V

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P30 P31-P33 P34-P36

NCP5331FTR2

Mfr. #:

Buy NCP5331FTR2

Manufacturer:

ON Semiconductor

Description:

IC REG CTRLR AMD 2OUT 32LQFP

Lifecycle:

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