zm7100 Power-One, zm7100 Datasheet - Page 26

• Manufacturer Part Number: zm7100
• Description: Zm7100 Series Digital Power Manager
• Manufacturer: Power-One

11. Application Information
11.1 Powering the DPM
The DPM can be powered directly from the intermediate voltage bus (IBV) or from an auxiliary source such as a
housekeeping, standby, or backplane supply. In applications where the DPM is used to control the front end
generating IBV and/or the crowbar, the DPM must be powered from an auxiliary source.
If the intermediate bus voltage exceeds 4.0V, the DPM can be powered directly from the IBV via Pin 23.
Schematic in Figure 24 shows power connections when the DPM input voltage is supplied directly by IBV. A low-
pass RC-filter is added to increase noise immunity of the voltage sense line.
If the DPM is powered by an auxiliary source higher than 4.0V, the IBV voltage range can be extended to 3.0 to
14V as shown in Figure 25.
REV. 4.0 JUL 28, 2006
Figure 25. Power Connections For Application With Auxiliary Source Higher Than 4.0V
IBV=4.0...14V
IBV=3.0...14V
Input Voltage
4.0...14V
Auxiliary
Input Voltage
Supply
DPM
POLs
Figure 24. Power Connections for IBV>4.0V
www.power-one.com
POLs
100
100
ZM7100 Series Digital Power Manager
22uF
4.7uF
22uF
4.7uF
Pin 10
IBV_S
Pin 25
Pin 23
Pin 24
GND
3V3
IBV
Pin 10
IBV_S
Pin 25
Pin 23
Pin 24
GND
3V3
IBV
DPM
DPM
LDO
LDO
Page 26 of 29
Data Sheet