参数资料
| 型号： | ZXSC420E6TA |
| 厂商： | Diodes Inc |
| 文件页数： | 6/12页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM VM SOT23-6 |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 200kHz |
| 占空比： | 85% |
| 电源电压： | 1.8 V ~ 8 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | SOT-23-6 |
| 包装： | 标准包装 |
| 产品目录页面： | 1479 (CN2011-ZH PDF) |
| 其它名称： | ZXSC420E6TADKR |
ZXSC410
ZXSC420
Sense Resistor
A low value sense resistor is required to set the peak
current. Power in this resistor is negligible due to the
low sense voltage threshold, V SENSE . Below is a table
of recommended sense resistors:
Manufacture
Cyntec
IRC
Series
RL1220
LR1206
R DC ( )
Range
0.022 - 10
0.010 - 1.0
Size
0805
1206
Tolerance
±5%
±5%
URL
http://www.cyntec.com
http://www.ictt.com
Output power calculation
By making the above assumptions for inductance and
peak current the output power can be determined by:
Output capacitors
Output capacitors are a critical choice in the overall
performance of the solution. They are required to filter
the output and supply load transient currents. There
P OUT = I AV x V IN x
= (Watts)
are three parameters which are paramount in the
selection of the output capacitors, capacitance, I RIPPLE
I AV = X
where
and
I PK (T ON + T DIS )
2 (T ON + T OFF )
and ESR. The capacitance value is selected to meet the
load transient requirements. The capacitors I RIPPLE
rating must meet or exceed the current ripple of the
solution.
The ESR of the output capacitor can also affect loop
stability and transient performance. The capacitors
T ON =
and
T DIS =
I PK x L
V IN
I PK x L
V OUT - V IN
selected for the solutions, and indicated in the
reference designs, are optimised to provide the best
overall performance.
Input capacitors
The input capacitor is chosen for its voltage and RMS
current rating. The use of low ESR electrolitic or
tantalum capacitors is recommended. Capacitor
values for optimum performance are suggested in the
and
T OFF ? 1.7μs (internally set by ZXSC410)
and
= efficiency i.e. 100% = 1
Operating frequency can be derived by:
reference design section
Also note that the ESR of the input capcitor is
effectively in series with the input and hence
contributes to efficiency losses in the order of I RMS 2 .
ESR.
F =
1
T ON + T OFF
ISSUE 2 - May 2003
SEMICONDUCTORS
6
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相关代理商/技术参数 |
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|---|---|
| ZXSC420E6TA-CUT TAPE | 制造商:DIODES 功能描述:ZXSC420 Series 8 V 200 kHz 300 mA SMT Voltage Mode Boost Converter - SOT-23-6 |
| ZXSC440 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:PHOTOFLASH CHARGER |
| ZXSC440_05 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:PHOTOFLASH CHARGER |
| ZXSC440X8 | 制造商:Diodes Incorporated 功能描述:IC PHOTO FLASH CHARGER SMD MSOP8 制造商:Diodes Incorporated 功能描述:IC, PHOTO FLASH CHARGER, SMD, MSOP8 |
| ZXSC440X8TA | 功能描述:开关变换器、稳压器与控制器 Boost - For Cameras RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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