CM8500A Datasheet, PDF (5/13 Pages) List of Unclassifed Manufacturers – 3A BUS TERMINATOR

APPLICATION CIRCUIT
CM8500A
3A BUS TERMINATOR
Vref-OUT
J3
1
2
C13
104
R8
100
TP1 4
BNC
1
3
L1
100uf/6.3V 100uf/6.3V 820uf/6.3V 3.3uH
VTT
J1
1
2
C12 C11 C7
C3
104
C2
C15
104 10uf/6.3V
VDD
2 C14
100uf/6.3V
R5
100k
1
J4ON/OFF 2 2
R6 R7
10k 10k
11
NOTE:
J3:referance output provided from Vtt
J4:short :Demo kit on .
open:off(into shutdown mode)
J6:reference output provided from shunt regulator
J5:pin1 ,pin2 short:Vtt = 1/2Vcc
When external voltage applied ,pin1,2 should be open
and pin2:connect to external voltage (+)
pin3:connect to external voltage (-)
D6
SK12
Vtt=1/2 external voltage
R6,R7(option circuit)forVttVOLTAGEADJUST
Vtt=(Vcc*R6)/R6+R7
D5
SK12
VCC
U1 CM8500A
1 _{VCC1 VCC2} 16
2 _{VDD1 VDD2} 15
C4 ^{3 VL1}
VL2 ¹⁴
104 4 _{PGND1 PGND2} 13
5 _{AGND1 AGND4} 12
6 _SD
FB ¹¹
7 _2/VCC
10
VCCQ
C6 8 _{G-sense AGND3} 9
102
R1
VCC 5R1
VDD
C5 C1
C10
104
10uf/6.3V
104
C9
100uf/6.3V
J5 ₃
2
1
IN/EXT
VDD
C16
J2
DC-INPUT
1
2
470uf/6.3V
R3 200k
1
2
1
2
R4
C8
1k
102
Figure 1. CM8500A Typical Application
(Schematic of CM8500ATEVAL)
2004/12/20
Champion Microelectronic Corporation
Page 5