C1

1uF

11k

R1

24K

R2

FT1

VC1

FT1

PI2003

GND

1

GATE

2

VC

3

FC

5

FT

6

SP

7

SN

8

U1

Vout-

Vin2+

BUS(+) A

BUS(+) B

C3

2.2uF

C4

Not Installed

C5

22uF

Vout+

D1

VC1

R5

Not Installed

Vin1+

C2

1uF

11k

R3

24K

R4

FT2

VC2

FT2

BUS(- ) B

Vin2-

PI2003

GND

1

GATE

2

VC

3

FC

5

FT

6

SP

7

SN

8

U2

D2

1

2

3

5

6

7

8

Q2

IRF7853

VC2

R6

Not Installed

BUS(- ) A

Vin1-

1

2

3

5

6

7

8

Q1

IRF7853

Figure 2 – PI2003-EVAL1 Evaluation Board schematic.

Item

QTY

Reference Designator

Value

Description

Footprint

Manufacturer

1

2

C1, C2

1 µF

Capacitor, MLCC X5R, 1 µF,16 V

0603

2

1

C3

2.2 uF

Capacitor, MLCC X7R, 2.2 uF, 100 V

1812

C4

Not installed

1812

C5

22 µF

Capacitor, Electrolytic, 22 µF 100 V

4

2

D1, D2

LED, Super Red

THIN 0603

Lite-On, Inc.,

5

4

FT1, FT2, VC1, VC2

Turret Test point

TURRET-1528

Keystone Electronics

66

Vin1+, Vin1-, Vin2+, Vin2-,

Turret Test point

TURRET-1502

Keystone Electronics

Vout+, Vout-

9

2

Q1, Q2

IRF7853

100 V, 8.3 A, N-MOSFET

SO-8

International Rectifier

10

2

R1, R3

11 K

Ω

Resistor, 11 K

Ω,1/4 W, 5%

0805

11

2

R2, R4

24 K

Ω

Resistor, 24 K

Ω,1/8 W, 5%

0805

12

2

R5, R6

Not Installed

0805

16

2

U1, U2

PI2003

Picor Active ORing Controller

3mmx3mm; 10-TDFN

PICOR

Table 2 – PI2003-EVAL1 Evaluation Board bill of materials

Reference Designator

Value

Functional Description

C1, C2

1 uF

VC Bypass Capacitor

C3, C4, C5,

Output (Load) Capacitor

D1, D2

LED

To indicate a fault exists when it is on

Q1, Q2

N-MOSFET

ORing MOSFET

R1, R3

11 K

Ω

VC Bias resistor

R2, R4

24 K

Ω

LED current limit resistor

R5, R6

Not Installed

Optional to connect VC to separate source

U1, U2

PI2003

Picor Active ORing Controller

Table 3 – Component functional description

Picor Corporation • www.picorpower.com

PI2003-EVAL1 User Guide Rev 1.0 Page 3 of 8