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参数资料
| 型号： | YM05S05-G |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-5 |
| 文件页数： | 21/24页 |
| 文件大小： | 438K |
| 代理商： | YM05S05-G |
Data Sheet
ZD-01978 REV 3.1
www.power-one.com
Page 6 of 24
YM05S05 DC-DC Converter
3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 5 A
recommended rather than one standard value from
Table 1.
Ground pin of the trim resistor should be connected
directly to the converter GND pin with no voltage
drop in between. Table 1 provides the trim resistor
values for popular output voltages.
The output voltage can also be programmed by an
external voltage source. To make trimming less
sensitive, a series external resistor Rext is
recommended between the TRIM pin and the
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 = 15K)
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 typically 2.3 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 2.2 V.
Output Overcurrent Protection (OCP)
The converter is protected against overcurrent and
short circuit conditions. Upon sensing an overcurrent
condition, the converter will enter hiccup mode. Once
over-load or short circuit condition is removed, Vout
will return to nominal value.
Overtemperature Protection (OTP)
The
converter
will
shut
down
under
an
overtemperature 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 15 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,
startup
and
shutdown
parameters, output ripple and noise, transient
response to load step-change, overload and short
circuit.
Table 1: Trim Resistor Value
V0-REG [V]
RTRIM [k]
The Closest
Standard Value [k]
0.7525
open
1.0
80.02
80.6
1.2
41.97
42.2
1.5
23.08
23.2
1.8
15.00
15
2.0
11.78
11.8
2.5
6.95
6.98
3.3
3.16
3.63
2.21
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