ZSPM1025A
True Digital PWM Controller (Single-Phase, Single-Rail)
If only four devices are used in a system, their respective addresses can alternatively be configured without
resistors by connecting the pins to GND or the AVDD18 pin. The PMBus™ addresses selectable in this fashion
are listed in Table 4.3.
Table 4.3
PMBus™ Address Selection without Resistors
Address
ADDR1
GND
ADDR0
AVDD18
GND
15
48
63
64
AVDD18
AVDD18
GND
AVDD18
GND
4.4. Configuration Registers
Two different sets of configuration parameters are supported by the ZSPM1025A. The first set of parameters can
only be configured during the configuration phase of the ZSPM1025A. These values are written into the OTP
memory and cannot be changed using PMBus™ commands during run-time. A second set of parameters can
also be configured during run-time using the appropriate PMBus™ commands. The two groups are classified in
the PMBus™ configuration table (Table 4.4).
Table 4.4
List of Supported PMBus™ Configuration Registers
Note: See important notes at the end of the table.
Data Format
PMBus™ Parameter
Description
Classification
Output Voltage
ON_OFF_CONFIG
On/off configuration
N/A
PMBus™
Read only
PMBus™
OTP
VOUT_MODE
Exponent of the VOUT_COMMAND value
Set output voltage
N/A
LINEAR (1)
VOUT_COMMAND
VOUT_OV_FAULT_LIMIT
VOUT_OV_WARN_LIMIT
VOUT_UV_WARN_LIMIT
VOUT_UV_FAULT_LIMIT
Output Current
Over-voltage fault limit
N/A
Over-voltage warning level
Under-voltage warning level
Under-voltage fault level
N/A
OTP
N/A
OTP
N/A
OTP
IOUT_OC_FAULT_LIMIT
IOUT_OC_WARN_LIMIT
Temperature - External
OT_FAULT_LIMIT
Over-current fault limit
N/A
N/A
OTP
OTP
Over-current warning level
External over-temperature fault level
N/A
N/A
OTP
OTP
OT_WARN_LIMIT
External over-temperature warning level
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the
prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
Data Sheet
October 24, 2013
24 of 46
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