Applications Manual
1. PMBus interface cable&connection
Terminal function
Terminal function on CHS300-I
Terminal function on CHS400/500-I
How to connect communication
Example of cabling pattern on PMBus communication
PMBus communication pull-up resistor value
Address setting
2. PMBus communication control
Overview of control block
RAM (Random Access Memory)
ROM (Random Access Read Only Memory)
Retain the number of abnormal power supply stopping
3. Data format
Data format for output voltage
Data format for another parameter
4. C2 terminal function
Power_Good function
Secondary side remote control function
5. SMBAlert function
SMBAlert terminal connecting
Checking salve for SMBAlert signal
In case multiple slave devices issue SMB Alert signal
How to do when SMB alert is issued repeatedly
6. Explain several functions
ON/OFF operation
Start-stop voltage
Start-up sequence (start-up delay / rising up)
Setting output voltage
Protective operation for output overvoltage
Protective operation for output undervoltage
Protective operation for overtemperature
Protective operation for undertemperature
Protecting operation for over start-up time
Prohibit re-writing parameter
7. Packet error checking
（（（（
PEC
））））
8. PMBus Hardware specifications
Ultimate maximum rate on communication terminal
Electrical characters specification on communication terminal
9. PMBus software Specifications
List of PMBus command
PMBus command setting / reading value
10. PMBus Commands set
CHS300/400/500-I series
Page
2
6
2.1
6
1.3
4
1.4
5
8
1.1
2
3.2
8
2.3
7
2.4
7
5.2
1.5
5
9
4.1
9
4.2
9
2.2
6
23
8.1
18
3.1
8
6.2
12
6.3
13
5.1
6.5
6.6
10
19
10
13
14
14
15
10
15
9.2
25
20
9.1
6.9
17
20
8.2
6.4
12
6.1
12
1.1.1
1.1.2
2
3
1.2
4
11
11
19
19
5.3
5.4
6.10
17
6.7
6.8
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