ZY2120 Power-One, ZY2120 Datasheet - Page 13

• Manufacturer Part Number: ZY2120
• Description: Zy2120 20a No-bus Pol
• Manufacturer: Power-One

8.
8.1
The open drain input/output with the internal pull-up
resistor. The POL converter pulls its OK pin low, if a
fault occurs. Pulling low the OK input by an external
circuitry turns off the POL converter.
8.2
The bidirectional input/output with the internal pull-up
resistor.
master, the SYNC line propagates clock to other
POL converters. If the POL converter is configured
as a slave, the internal clock recovery circuit
synchronizes the POL converter to the clock of the
SYNC line.
8.3
The input with the internal pull-up resistor. When the
pin is left floating, the switching frequency is
determined by an external clock applied to the SYNC
pin.
converter as a master. The master determines the
clock on the SYNC line.
8.4
The open drain input/output with the internal pull-up
resistor. The pin is pulled low by the POL converter,
if the output voltage is outside of the window defined
by the Power Good High and Low thresholds.
8.5
Inputs with internal pull-ups to select one of 2 sets of
digital filter coefficients optimized for different
characteristics of output capacitance.
8.6
The open drain digital input/output with the internal
pull-up resistor. The duty cycle of the digital signal is
proportional to the output current of the POL
converter.
shall be avoided.
8.7
The output of the 2V internal voltage reference that
is used to program the output voltage of the POL
converter.
8.8
The input of the TRIM comparator for the output
voltage programming.
ZD-02139 Rev. 1.0 04NOV08
Pin and Feature Description
OK, Fault Status
SYNC, Frequency Synchronization Line
IM, Interleave Mode
PG, Power Good
CCA, Compensation Coefficient Address
CS, Current Share/Sense Bus
MARGIN, Output Voltage Margining
TRIM, Output Voltage Trim
Pulling the IM pin low configures a POL
If the POL converter is configured as a
External capacitive loading of the pin
www.power-one.com
8V to 14V Input
ZY2120 20A No-Bus POL Data Sheet
The output voltage is programmed by a single
resistor connected between MARGIN and TRIM
pins.
8.9
The input with the internal pull-up resistor. The POL
converter is turned off, when the pin is pulled low
8.10 –VS and +VS
The differential voltage input of the POL converter
feedback loop.
V
out
0.50
0.75
1.0
1.5
1.8
2.5
3.3
5.0
[V]
EN, Enable
R
Table 1. Trim Resistor Values
TRIM
Open
126.7
53.3
41.1
13.3
90
24
2
[kΩ]
Preliminary Data Sheet
•
0.5V to 5.5V Output
The Closest Standard
Page 13 of 15
Value [kΩ]
13 .3
90.9
53.6
41.2
24.3
127
2