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参数资料
| 型号： | YS05S16-D |
| 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 |
| 文件页数： | 21/25页 |
| 文件大小： | 425K |
| 代理商： | YS05S16-D |
OCT 18, 2006 revised to APR 10, 2007
Page 5 of 25
www.power-one.com
YS05S16 DC-DC Converter Data Sheet
3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 16 A
Operations
Input and Output Impedance
The YS05S16 converter should be connected via a
low impedance to the DC power source. In many
applications, the inductance associated with the
distribution from the power source to the input of the
converter can affect the stability of the converter.
The use of decoupling capacitors is recommended in
order to ensure stability of the converter and reduce
input ripple voltage. Internally, the converter has
44 μF (low ESR ceramics) of input capacitance.
In a typical application, low - ESR tantalum or POS
capacitors will be sufficient to provide adequate
ripple voltage filtering at the input of the converter.
However,
very
low
ESR
ceramic
capacitors
100 - 200 μF are recommended at the input of the
converter in order to minimize the input ripple
voltage. They should be placed as close as possible
to the input pins of the converter.
The YS05S16 has been designed for stable
operation with or without external capacitance. Low
ESR ceramic capacitors placed as close as possible
to the load (minimum 100 μF) are recommended for
improved transient performance and lower output
voltage ripple.
It is important to keep low resistance and low
inductance PCB traces for connecting load to the
output pins of the converter in order to maintain good
load regulation.
Fig. A shows input voltage ripple for various output
voltages using four 47 μF input ceramic capacitors.
The same plot is shown in Fig. B with one 470 μF
polymer capacitor (6TPB470M from Sanyo) in
parallel with two 47 μF ceramic capacitors at full
load.
Vout [V]
0123
4
In
pu
tV
o
lt
ag
eRi
pp
le
[m
V
p
-p
]
0
4
8
12
16
20
24
Vin = 3.3V
Vin = 5.0V
Fig. A: Input Voltage Ripple, CIN = 4 x 47 μF ceramic, full load.
Vout [V]
01234
Inpu
tV
o
lta
g
e
R
ipp
le
[mV
p
-p
]
0
4
8
12
16
20
24
28
32
Vin = 3.3V
Vin = 5.0V
Fig. B: Input Voltage Ripple, CIN = 470 μF polymer + 2 x 47 μF
ceramic.
ON/OFF (Pin 1)
The ON/OFF pin is used to turn the power converter
on or off remotely via a system signal. There are two
remote control options available, positive logic
(standard option) and negative logic, with both
referenced to GND. The typical connections are
shown in Fig. C.
To turn the converter on the ON/OFF pin should be
at a logic low or left open, and to turn the converter
off the ON/OFF pin should be at a logic high or
connected to Vin. See the Electrical Specifications
for logic high/low definitions.
Rload
Vin
CONTROL
INPUT
Vin
GND
ON/OFF
SENSE
(Top View)
Converter
TRIM
Vout
R*
R* is for negative logic option only
Y-Series
Fig. C: Circuit configuration for ON/OFF function.
The positive logic version turns the converter on
when the ON/OFF pin is at a logic high or left open,
and turns the converter off when at a logic low or
shorted to GND.
The negative logic version turns the converter on
when the ON/OFF pin is at logic low or left open, and
turns the converter off when the ON/OFF pin is at a
logic high or connected to Vin.
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