- 您现在的位置：买卖IC网 > PDF目录20428 > ADM00427 (Microchip Technology)BOARD EVALUATION MCP16323 PDF资料下载
参数资料
| 型号： | ADM00427 |
| 厂商： | Microchip Technology |
| 文件页数： | 19/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION MCP16323 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 3V |
| 电流 - 输出： | 3A |
| 输入电压： | 6 ~ 18 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 1MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MCP16323 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页当前第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
MCP16323
5.0
APPLICATION INFORMATION
5.0.3
GENERAL DESIGN EQUATIONS
5.0.1
TYPICAL APPLICATIONS
The step-down converter duty cycle can be estimated
using Equation 5-2 , while operating in Continuous
The MCP16323 synchronous step-down converter
operates over a wide input range, up to 18V maximum.
Typical applications include generating a bias or V DD
voltage for PIC ? microcontrollers, digital control system
bias supply for AC-DC converters and 12V industrial
input and similar applications.
Inductor Current Mode. This equation accounts for the
forward drop of two internal N-Channel MOSFETS. As
load current increases, the voltage drop in both internal
switches will increase, requiring a larger PWM duty
cycle to maintain the output voltage regulation. Switch
voltage drop is estimated by multiplying the switch
5.0.2
ADJUSTABLE OUTPUT VOLTAGE
current times the switch resistance or R DSON .
CALCULATIONS
EQUATION 5-2:
CONTINUOUS INDUCTOR
V IN – ( I HSW × R DSONH )
To calculate the resistor divider values for the
MCP16323 adjustable version, use Equation 5-1 . R TOP
is connected to V OUT , R BOT is connected to SGND, and
both are connected to the V FB input pin.
CURRENT DUTY CYCLE
V OUT + ( I LSW × R DSONL )
D = -------------------------------------------------------------
EQUATION 5-1:
RESISTOR DIVIDER
5.0.4
INPUT CAPACITOR SELECTION
V OUT = V FB × ? ? ? ?
CALCULATION
R TOP
1 + ------------
R BOT
The step-down converter input capacitor must filter the
high-input ripple current, as a result of pulsing or
chopping the input voltage. The MCP16323 input
voltage pin is used to supply voltage for the power train
and as a source for internal bias. A low equivalent
EXAMPLE 5-1:
2.0V RESISTOR DIVIDER
series resistance (ESR), preferably a ceramic
capacitor, is recommended. The necessary
V OUT = 2.0V
V FB = 0.9V
R BOT = 10 k Ω
R TOP = 12.2 k Ω (Standard Value = 12.3 k Ω )
V OUT = 2.007V (using standard values)
capacitance is dependent upon the maximum load
current and source impedance. Three capacitor
parameters to keep in mind are the voltage rating,
equivalent series resistance and the temperature
rating. For wide temperature range applications, a
multi-layer X7R dielectric is recommended, while for
applications with limited temperature range, a
EXAMPLE 5-2:
4.2V RESISTOR DIVIDER
multilayer X5R dielectric is acceptable. The input
capacitor voltage rating must be V IN plus margin.
V OUT = 4.2V
V FB = 0.9V
R BOT = 10 k Ω
R TOP = 36.7 k Ω (Standard Value = 36.5 k Ω )
V OUT = 4.185V (using standard values)
The error amplifier is internally compensated to ensure
loop stability. External resistor dividers, inductance and
output capacitance, all have an impact on the control
system and should be selected carefully and evaluated
for stability. A 10 k ? resistor is recommended as a
good trade-off for quiescent current and noise
immunity.
5.0.5 OUTPUT CAPACITOR SELECTION
The output capacitor provides a stable output voltage
during sudden load transients, and reduces the output
voltage ripple. As with the input capacitor, X5R and
X7R ceramic capacitors are well suited for this applica-
tion.
The MCP16323 is internally compensated, so the
output capacitor range.
The amount and type of output capacitance and
equivalent series resistance will have a significant
effect on the output ripple voltage and system stability.
The range of the output capacitance is limited due to
the integrated compensation of the MCP16323.
The output voltage capacitor rating should be a
minimum of V OUT plus margin.
TABLE 5-1:
CAPACITOR VALUE RANGE
? 2011 Microchip Technology Inc.
Parameter
C IN
Min
8 μF
Max
None
DS22284A-page 19
相关PDF资料 |
PDF描述 |
|---|---|
| 17PY-Z053-99VS | MOTOR STEP UNI .9DEG 42MM 24V DL |
| ESA06DTMD | CONN EDGECARD 12POS R/A .125 SLD |
| T95Y686M004CSAL | CAP TANT 68UF 4V 20% 2910 |
| MKP1V240RLG | SIDAC BIDIR 0.9A 240V DO-41 |
| AT45DB081B-CNU-2.5 | IC FLASH 8MBIT 20MHZ 8CASON |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM00433 | 功能描述:MCP16301 - DC/DC, Step Down 1, Non-Isolated Outputs Evaluation Board 制造商:microchip technology 系列:- 零件状态:有效 主要用途:DC/DC，步降 输出和类型:1，非隔离 功率 - 输出:- 电压 - 输出:5V 电流 - 输出:600mA 电压 - 输入:6 V ~ 30 V 稳压器拓扑:降压 频率 - 开关:- 板类型:完全填充 所含物品:板 使用的 IC/零件:MCP16301 标准包装:1 |
| ADM00434 | 制造商:Microchip Technology Inc 功能描述:MCP19035 300 KHZ SYNCHRONOUS BUCK CONTROLLER EVALUATION BOAR - Boxed Product (Development Kits) 制造商:Microchip Technology Inc 功能描述:BOARD EVAL FOR MCP19035 制造商:Microchip Technology Inc 功能描述:MCP19035 300 kHz Evaluation Board |
| ADM00435 | 功能描述:MCP1643 1, Non-Isolated Output LED Driver Evaluation Board 制造商:microchip technology 系列:- 零件状态:有效 电流 - 输出/通道:25mA，50mA，75mA，或 100mA 输出和类型:1，非隔离 电压 - 输出:- 特性:- 电压 - 输入:0.35 V ~ 2.5 V 所含物品:板 使用的 IC/零件:MCP1643 标准包装:1 |
| ADM00443 | 功能描述:MCP6421 1 - Single Channels per IC General Purpose Amplifier Evaluation Board 制造商:microchip technology 系列:- 零件状态:有效 每 IC 通道数:1 - 单 放大器类型:通用 输出类型:单端，满摆幅 压摆率:0.05 V/μs -3db 带宽:- 电流 - 输出/通道:22mA 工作温度:-40°C ~ 125°C 电流 - 电源（主 IC）:4.4μA 电压 - 电源，单/双（±）:1.8 V ~ 5.5 V，±0.9 V ~ 2.75 V 板类型:完全填充 所含物品:板 使用的 IC/零件:MCP6421 标准包装:1 |
| ADM00445 | 制造商:Microchip Technology Inc 功能描述:MCP19035 600KHZ EVALUATION BOARD - Boxed Product (Development Kits) 制造商:Microchip Technology Inc 功能描述:BOARD EVAL ANALOG MCP19035 制造商:Microchip Technology Inc 功能描述:MCP19035 600KHz Evaluation Board, DEVTOOL - Analog |
发布紧急采购，3分钟左右您将得到回复。