CM8500AIS datasheet(5/13 Pages) ETC1

Part #	CM8500AIS

Description	3A BUS TERMINATOR

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CM8500A

3A BUS TERMINATOR

APPLICATION CIRCUIT

R3 200k

2

1

VDD

pin3:connect to external voltage (-)

C2

104

J1

VTT

1

2

C4

104

J2

DC-INPUT

1

2

When external voltage applied ,pin1,2 should be open

C12

100uf/6.3V

C8

102

J3

Vref-OUT

1

2

Vtt=1/2 external voltage

R6,R7(option circuit)forVttVOLTAGEADJUST

and pin2:connect to external voltage (+)

TP1

BNC

1

3

4

VCC

NOTE:

J4ON/OFF

J3:referance output provided from Vtt

C14

100uf/6.3V

R1

5R1

L1

3.3uH

C7

820uf/6.3V

R8

100

C3

104

C11

100uf/6.3V

open:off(into shutdown mode)

VDD

VCC

J5

IN/EXT

2

1

3

R4

1k

2

1

C10

10uf/6.3V

C1

104

J6:reference output provided from shunt regulator

VDD

C16

470uf/6.3V

C13

104

C15

10uf/6.3V

C9

100uf/6.3V

R5

100k

2

1

U1 CM8500A

2

1

3

13

14

15

16

4

5

6

7

8

9

10

11

12

VDD1

VCC1

VL1

PGND2

VL2

VDD2

VCC2

PGND1

AGND1

SD

2/VCC

G-sense AGND3

VCCQ

FB

AGND4

J5:pin1 ,pin2 short:Vtt = 1/2Vcc

D5

SK12

R6

10k

2

1

J4:short :Demo kit on .

C6

102

D6

SK12

C5

104

R7

10k

2

1

Vtt=(Vcc*R6)/R6+R7

Figure 1. CM8500A Typical Application

(Schematic of CM8500ATEVAL)

2004/12/20

Champion Microelectronic Corporation

Page 5

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