ZY8105 5A DC-DC Intelligent POL
8V to 14V Input ? 0.5V to 5.5V Output
Data Sheet
The POL powering the output V1 (Ch3 in the picture)
executes the regular turn-off. Since both V1 and V3
have the same delay and slew rate settings they will
continue to turn off and on synchronously every
130ms as shown in Figure 36 until the condition
causing the undervoltage is removed. The POL
powering the output V2 continues to ramp up until it
reaches its steady state level.
130ms is the interval from the instant of time when
the output voltage ramps down to zero until the
output voltage starts to ramp up again. Therefore,
the 130ms hiccup interval is guaranteed regardless
of the turn-off delay setting.
Figure 36. Turn-On into UVP on V3. The UV Fault Is
Programmed To Be Non-Latching and Propagate
From Group C to Group A. Ch1 – V3 (Group C),
Ch2 – V2, Ch3 – V1 (Group A)
Summary of protections, their parameters and
features are shown in Table 3
Figure 35. Turn-On into UVP on V3. The UV Fault Is
Programmed To Be Non-Latching. Ch1 – V3
(Group C), Ch2 – V2, Ch3 – V1 (Group A)
Table 3. Summary of Protections Parameters and Features
Code
Name
Type
When Active
Turn
Low Side
Propagation
Disable
Off
Switch
PT
PG
Temperature
Warning
Power Good
Warning
Warning
Whenever V IN is applied
During steady state
No
No
N/A
N/A
Sends signal to
DPM
Sends signal to
No
No
DPM
TR
OT
OC
UV
OV
Tracking
Overtemperature
Overcurrent
Undervoltage
Overvoltage
Fault
Fault
Fault
Fault
Error
During ramp up
Whenever V IN is applied
When V OUT exceeds prebias
During steady state
When V OUT exceeds prebias
Fast
Regular
Fast
Regular
Fast
Off
Off
Off
Off
On
Regular turn off
Regular turn off
Regular turn off
Regular turn off
Fast turn off
Yes
No
No
No
No
ZD-01740 Rev. 1.1, 01-Jul-10
www.power-one.com
Page 21 of 28
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