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参数资料
| 型号： | ADP1613-BL3-EVZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/28页 |
| 文件大小： | 0K |
| 描述： | EVAL BLANK ADISIMPOWER ADP1613 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步升 |
| 稳压器拓扑结构： | 升压 |
| 板类型： | 裸（未填充） |
| 已供物品： | 裸板 |
| 已用 IC / 零件： | ADP1613 |
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t ON =
D
V IN × t ON
? I L = (5)
V IN × t ON
? I L
Data Sheet
APPLICATIONS INFORMATION
ADIsimPower DESIGN TOOL
The ADP1612/ADP1613 are supported by ADIsimPower design
tool set. ADIsimPower is a collection of tools that produce
complete power designs optimized for a specific design goal.
The tools enable the user to generate a full schematic, bill of
materials, and calculate performance in minutes. ADIsimPower
can optimize designs for cost, area, efficiency, and parts count
while taking into consideration the operating conditions and
limitations of the IC and all real external components. For more
information about ADIsimPower design tools, refer to
www.analog.com/ADIsimPower . The tool set is available from
this website, and users can also request an unpopulated board
through the tool.
SETTING THE OUTPUT VOLTAGE
The ADP1612/ADP1613 feature an adjustable output voltage
range of V IN to 20 V. The output voltage is set by the resistor
voltage divider, R1 and R2, (see Figure 34) from the output
voltage (V OUT ) to the 1.235 V feedback input at FB. Use the
following equation to determine the output voltage:
V OUT = 1.235 × (1 + R1 / R2 ) (1)
Choose R1 based on the following equation:
ADP1612/ADP1613
Using the duty cycle and switching frequency, f SW , determine
the on time by the following equation:
(4)
f SW
The inductor ripple current ( ? I L ) in steady state is calculated by
L
Solve for the inductance value (L) by the following equation:
L = (6)
Ensure that the peak inductor current (the maximum input
current plus half the inductor ripple current) is below the rated
saturation current of the inductor. Likewise, make sure that the
maximum rated rms current of the inductor is greater than the
maximum dc input current to the regulator.
For CCM duty cycles greater than 50% that occur with input
voltages less than one-half the output voltage, slope compen-
sation is required to maintain stability of the current-mode
regulator. For stable current-mode operation, ensure that the
selected inductance is equal to or greater than the minimum
R1 = R2 × ? OUT
? V ? 1 . 235 ?
? 1 . 235 ?
?
(2)
calculated inductance, L MIN , for the application parameters in
the following equation:
INDUCTOR SELECTION
The inductor is an essential part of the step-up switching
L > L MIN =
( V OUT ? 2 × V IN )
2 . 7 × f SW
(7)
converter. It stores energy during the on time of the power
switch, and transfers that energy to the output through the
output rectifier during the off time. To balance the tradeoffs
between small inductor current ripple and efficiency, induc-
tance values in the range of 4.7 μH to 22 μH are recommended.
In general, lower inductance values have higher saturation
current and lower series resistance for a given physical size.
Inductors smaller than the 4.7 μH to 22 μH recommended
range can be used as long as Equation 7 is satisfied for the given
application. For input/output combinations that approach the
90% maximum duty cycle, doubling the inductor is recom-
mended to ensure stable operation. Table 5 suggests a series
of inductors for use with the ADP1612/ADP1613.
However, lower inductance results in a higher peak current
that can lead to reduced efficiency and greater input and/or
output ripple and noise. A peak-to-peak inductor ripple current
Table 5. Suggested Inductors
Manufacturer Part Series
Dimensions
L × W × H (mm)
V OUT ? V IN
close to 30% of the maximum dc input current typically yields
an optimal compromise.
For determining the inductor ripple current in continuous
operation, the input (V IN ) and output (V OUT ) voltages determine
the switch duty cycle (D) by the following equation:
D = (3)
V OUT
Sumida
Coilcraft
Toko
Würth
Elektronik
CMD4D11
CDRH4D28CNP
CDRH5D18NP
CDRH6D26HPNP
DO3308P
DO3316P
D52LC
D62LCB
D63LCB
WE-TPC
WE-PD, PD2, PD3, PD4
5.8 × 4.4 × 1.2
5.1 × 5.1 × 3.0
6.0 × 6.0 × 2.0
7.0 × 7.0 × 2.8
12.95 × 9.4 × 3.0
12.95 × 9.4 × 5.21
5.2 × 5.2 × 2.0
6.2 × 6.3 × 2.0
6.2 × 6.3 × 3.5
Assorted
Assorted
Rev. D | Page 13 of 28
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| ADP1614 | 制造商:AD 制造商全称:Analog Devices 功能描述:650 kHz/1.3 MHz, 4 A, Step-Up |
| ADP1614-1.3-EVALZ | 功能描述:电源管理IC开发工具 Eval Board 1.3 MHz Switching Freq RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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