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參數(shù)資料
| 型號： | YNC05S20-0-G |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 24/26頁 |
| 文件大小： | 386K |
| 代理商： | YNC05S20-0-G |
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OCT 02, 2006 revised to APR 23, 2007
Page 7 of 26
www.power-one.com
YNC05S20 DC-DC Converter Data Sheet
4.5-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 20A
The output voltage can be also programmed by
external voltage source. To make trimming less
sensitive, a series external resistor Rext is
recommended
between
TRIM
pin
and
programming voltage source. Control Voltage can
be calculated by the formula:
30.1
0.7525)
-
)(V
R
1
(5.1
7
.
0
V
REQ
-
O
EXT
CTRL
+
=
[V]
where,
=
CTRL
V
Control voltage [V]
=
EXT
R
External resistor between TRIM pin and
voltage source; the value can be chosen
depending on the required output voltage range
[k
Ω]
Control voltages with
=
EXT
R
0 and
=
EXT
R
15K are
shown in Table 2.
Table 2: Control Voltage [VDC]
V0-REG [V]
VCTRL (REXT = 0)
VCTRL (REXT = 15 K)
0.7525
0.700
1.0
0.658
0.535
1.2
0.624
0.401
1.5
0.573
0.201
1.8
0.522
0.000
2.0
0.488
-0.133
2.5
0.403
-0.468
3.3
0.268
-1.002
3.63
0.212
-1.223
Protection Features
Input Undervoltage Lockout
Input undervoltage lockout is standard with this
converter. The converter will shut down when the
input voltage drops below a pre-determined
voltage; it will start automatically when Vin returns
to a specified range.
The input voltage must be at least 2.15 V for the
converter to turn on. Once the converter has been
turned on, it will shut off when the input voltage
drops below typically 1.9 V.
Output Overcurrent Protection (OCP)
The converter is protected against over-current
and short circuit conditions. Upon sensing an over-
current condition, the converter will enter hiccup
mode. Once the overload or short-circuit condition
is removed, Vout will return to nominal value.
Overtemperature Protection (OTP)
The converter will shut down under an over-
temperature condition to protect itself from
overheating caused by operation outside the
thermal derating curves, or operation in abnormal
conditions such as system fan failure. After the
converter has cooled to a safe operating
temperature, it will automatically restart.
Safety Requirements
The converter meets North American and
international safety regulatory requirements per
UL60950 and EN60950. The maximum DC
voltage between any two pins is Vin under all
operating conditions. Therefore, the unit has ELV
(extra low voltage) output; it meets SELV
requirements under the condition that all input
voltages are ELV.
The converter is not internally fused. To comply
with safety agencies requirements, a recognized
fuse with a maximum rating of 25 Amps must be
used in series with the input line.
Characterization
General Information
The converter has been characterized for many
operational aspects, to include thermal derating
(maximum load current as a function of ambient
temperature and airflow) for vertical and horizontal
mounting, efficiency, start-up and shutdown
parameters, output ripple and noise, transient
response to load step-change, overload, and short
circuit.
The figures are numbered as Fig. x.y, where x
indicates the different output voltages, and y
associates with specific plots (y = 1 for the vertical
thermal derating, …). For example, Fig. x.1 will
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