参数资料
| 型号： | ZXSC420E6TA |
| 厂商： | Diodes Inc |
| 文件页数： | 5/12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
PIN DESCRIPTIONS
Pin No.
1
2
3
4
5
6
Name
V CC
GND
STDN/EOR
SENSE
V FB
DRIVE
Description
Supply voltage, 1.8V to 8V.
Ground
Shutdown ZXSC410 / End of regulation ZXSC420
Inductor current sense input. Internal threshold voltage set to
28mV. Connect external sense resistor.
Reference voltage. Internal threshold set to 300mV. Connect
external resistor network to set output voltage.
Drive output for external switching transistor. Connect to base or
gate of external switching transistor.
APPLICATIONS INFORMATION
Switching transistor selection
The choice of switching transistor has a major impact
on the converter efficiency. For optimum performance,
a bipolar transistor with low V CE(SAT) and high gain is
required. The V CEO of the switching transistor is also an
important parameter as this sees the full output
voltage when the transistor is switched off. Zetex
SuperSOT ? transistors are an ideal choice for this
Inductor Selection
The inductor value must be chosen to satisfy
performance, cost and size requirements of the overall
solution.
Inductor selection has a significant impact on the
converter performance. For applications where
efficiency is critical, an inductor with a series resistance
application.
of 500m
or less should be used.
Schottky diode selection
As with the switching transistor, the Schottky rectifier
diode has a major impact on the converter efficiency. A
A list of recommended inductors is listed in the table
below:
Schottky diode with a low forward voltage and fast
recovery time should be used for this application.
Part No.
Manufacture
L
I PK R DC
(A) ( )
The diode should be selected so that the maximum
forward current rating is greater or equal to the
CMD4D11-100MC Sumida
CMD4D11-220MC Sumida
10μH 0.5 0.457
22μH 0.4 0.676
maximum peak current in the inductor, and the
maximum reverse voltage is greater or equal to the
LPO2506OB-103
Coilcraft
10μH 1.0 0.24
output voltage. The Zetex ZHCS Series meet these
needs.
ST2006103
Standex
Electronics Inc
10μH 0.6
0.1
Combination devices
To minimise the external component count Zetex
recommends the ZX3CDBS1M832 combination of
NPN transistor and Schottky diode in a 3mm x 2mm
MLP package. This device is recommended for use in
space critical applications.
The IC is also capable of driving MOSFETs. Zetex
recommends the ZXMNS3BM832 combination of low
threshold voltage N-Channel MOSFET and Schottky
diode in a 3mm x 2mm MLP package. This device is
Peak current definition
In general, the I PK value must be chosen to ensure that
the switching transistor, Q1, is in full saturation with
maximum output power conditions, assuming
worse-case input voltage and transistor gain under all
operating temperature extremes.
Once I PK is decided the value of R SENSE can be
determined by:
recommended for use in space critical applications.
ISSUE 2 - May 2003
5
RSENSE =
VSENSE
IPK
SEMICONDUCTORS
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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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