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參數(shù)資料
| 型號(hào)： | DDR12 |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Tracking Dual Output DC-DC Converters |
| 中文描述： | 追蹤雙輸出DC - DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 301K |
| 代理商： | DDR12 |
DDR12 Series | Tracking Dual Output
DC-DC Converters
5
www.artesyn.com
File Name: lf_ddr12.pdf Rev: 29 Nov 2005
Input Characteristics
Electrical Charact. - VddqO/P
Characteristic
Symbol
Min
Typ
Max
Units
Notes and Conditions
Nominal set-point voltage
Output voltage range
Vddq (nom)
Vddq
2.316
Vdc
Vdc
With no external trim resistor
For details on trimming the
output voltage see
Application Note 133
2.316
2.750
Output set-point accuracy
±1.5
±2.5
%
Using 1% trim resistors
measured at minimum load
Load regulation
+0/-1
+1/-2
%
Vary load with line held constant
(Voltage typically drops with load)
Line regulation
±0.1
±0.2
%
Vary line with load held constant
Cross regulation
±0.4
±0.6
Vary load on Vttwith load on
Vddqheld constant
Temperature co-efficient
Ripple and noise
0.2
50
mV/oC
mV pk-pk
With recommended external
load capacitance and
5 Hz to 20 MHz bandwidth
Load transient response -
peak deviation
3
%
Peak deviation for 75% to 100%
step load, di/dt = 0.04 A/μs
Load transient response -
recovery
200
μs
Settling time to within 1% of
output setpoint voltage for
75% to 100% step load
External load capacitance
Cext(Vddq)
1000
1680
3000
μF
Recommended 3 x 560 μF with
total ESR of 5 m
and additional
high-quality ceramic capacitors.
Consult factory for other capacitance
Overshoot
2.0
%
Nominal output at turn-on
Undershoot
150
mVdc
Output current - continuous
Iddq
1.5
25
Adc
Output current - short circuit
Isc-ddq
0
A rms
Latching short circuit protection
power or enable needs to be
cycled
Characteristic
Symbol
Min
Typ
Max
Units
Notes and Conditions
Input current - operating
Iin
7.2
Adc
Reflected ripple current
Iin (ripple)
35
50
mA rms
mA pk-pk See Application Note 133 for
details
μF
measured with external filter.
Input capacitance - internal
filter
Cinput
420
Input capacitance - external
filter
Cbypass
10
μF
Use large value ceramic
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