zm7100 Power-One, zm7100 Datasheet - Page 8

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

9.
AC_FAIL_N, AC Fail Input (Pin 22): A Schmitt-
Trigger input with internal pull-up resistor (active
low). Pulling low the input indicates to the DPM that
an AC-DC front-end has lost the mains and that a
system shut down should immediately be initiated.
ADD[0:2], I
Inputs with internal pull-up resistor.
encoded address determines the Digital Power
Manager’s communication address for the I
interface.
CB, Crowbar Output (Pin 7): A CMOS output which
is used to trigger a crowbar (SCR) in case of
overvoltage on the Intermediate Voltage Bus.
FE_EN, Front-End Enable (Pin 6): A CMOS output
which is used to turn-on/off the DC/DC converter
generating the IBV.
HW_RES_N, Hardware Reset (Pin 21): An input
with internal pull-up resistor. When pulled low a cold
start of the Digital Power Manager is initiated. This
function should not be used to initiate normal system
shutdown or turn-on.
I2C_SDA, I2C_SCL, I2C Interface (Pin 13, 12).
Serial data (SDA) and clock (SCL) lines. Open drain
input/outputs with internal pull-up resistors. The pins
are not 5V tolerant; therefore, if external pull-ups are
added, they must be connected to the 3V3 pin of the
DPM.
IBV_S, Intermediate Voltage Bus Sense (Pin 10):
Analog input to an internal ADC circuit to monitor the
Intermediate Bus Voltage.
INT[0:3]_N, Interrupts (Pin 14, 15, 16, 17): Four
active low inputs with internal pull-ups. Each of the
REV. 4.0 JUL 28, 2006
Pins Description
2
C Address Inputs (Pin 20, 19, 9):
www.power-one.com
The 3 bit
2
C
ZM7100 Series Digital Power Manager
inputs can be programmed to act as a remote enable
for a specific group(s) of POL converters.
pulled low, the interrupt will turn-off respective POL
converters. When the interrupt is released, the POL
converters will turn-on according to their turn-on
delay and slew rate settings.
OKA, OKB, OKC, OKD, Group OK Signals (Pin 5,
4, 3, 2): Open drain input/outputs with internal pull-
up resistors. Pulling low the OK input will indicate to
the DPM a fault in a Group. The DPM can also pull
an OK line low to disable a Group of POL converters.
RES_N, Active Low Reset Input (Pin 18): An input
with internal pull-up resistor. When pulled low a soft
reset of the system (sequenced turn-off of all POL
converters) is initiated. When released the whole
system is reprogrammed and started (if Auto Turn-
On is enabled).
SD, Sync/Data Line (Pin 1): An open drain
input/output
Communication line to distribute a master clock and
at the same time to communicate with all POL
converters.
3V3, VDD (Pin 25): The output of the internal 3.3V
linear regulator and input of an external 3.3V supply.
Also used for additional pull-ups on SD, I2C_SDA
and I2C_SCL lines
IBV, Positive Supply (Pin 23): Supply voltage.
GND, Ground (Pin 24): Ground.
NC, No Connect (Pin 8, 11): All NC pins must
remain floating.
with
internal
pull-up
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Data Sheet
resistor.
When