- 您现在的位置：买卖IC网 > Datasheet目录345 > NCP1605FORWGEVB (ON Semiconductor)EVAL BOARD FOR NCP1605FORWG Datasheet资料下载
参数资料
| 型号： | NCP1605FORWGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/19页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP1605FORWG |
| 设计资源： | NCP1605FORWGEVB BOM NCP1605FORWGEVB Gerber Files NCP1605 EVB Schematic |
| 标准包装： | 1 |
| 主要目的： | AC/DC，主面和辅面，带 PFC |
| 输出及类型： | 1，隔离 |
| 输出电压： | 19V |
| 电流 - 输出： | 8A |
| 输入电压： | 90 ~ 265VAC |
| 稳压器拓扑结构： | 正向转换器 |
| 频率 - 开关： | 133kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP1217，NCP1605 |
| 其它名称： | NCP1605FORWGEVBOS |
NCP1217, NCP1217A
Duty Cycle Typ = 74%
2.9 V
0V
Latching Off the NCP1217
Total latched shutdown can easily be implemented
through a simple PNP bipolar transistor as depicted by
Figure 23. When OFF, Q1 is transparent to the operation.
When forward biased, the transistor pulls the Adj pin toward
+
--
L.E.B.
19 k
CS
Rcomp
V CC and permanently latches--off the IC as soon Vadj goes
above the latching level (typical 3.1 V). Figure 23 shows
how to wire the bipolar transistor to activate the latchoff. A
typical candidate for Q1 could be an MMBT3906 from
Rsense
From
Setpoint
Figure 22. Inserting a Resistor in Series with the Current
ON Semiconductor.
V CC
Sense Information Brings Ramp Compensation
In the NCP1217, the ramp features a swing of 2.9 V with
a duty cycle max at 74%. Over a 65 kHz frequency, for
instance, it corresponds to a 254 mV/ m s ramp. In our
FLYBACK design, let’s suppose that our primary
Off
Q1
Rlimit
inductance Lp is 350 m H, delivering 12 V with a Np:Ns ratio
of 1:0.1. The OFF time primary current slope is thus given
1
2
8
7
(Vout + Vf) ·
by:
= 371 mA ∕ m s or 37 mV ∕ m s when
Np
Ns
Lp
projected over an Rsense of 0.1 Ω , for instance. If we select
3
4
6
5
CV CC
75% of the downslope as the required amount of ramp
compensation, then we shall inject 27 mV/ m s. Our
internal compensation being of 254 mV/ m s, the divider
ratio ( divratio ) between Rcomp and the 19 k Ω is 0.106.
A few lines of algebra to determine Rcomp:
Figure 23. A Simple Bipolar Transistor Totally
Disables the IC
19 k · divratio
(1--divratio)
= 2.26 k Ω .
http://onsemi.com
12
相关PDF资料 |
PDF描述 |
|---|---|
| NCP1840Q8A6MNTWG | IC LED DRIVER 12CH PROGR 20QFN |
| NCP1910GEVB | BOARD DEMO NCP1910DEMO-B-TLS |
| NCP3418BMNR2G | IC MOSFET DRIVER DUAL 12V 10-DFN |
| NCP3418DR2 | IC MOSFET DRIVER DUAL 12V 8-SOIC |
| NCP3420DR2G | IC MOSFET DRIVER DUAL 12V 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1605LCDTVGEVB | 功能描述:BOARD EVAL NCP1605/1396 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板 |
| NCP1606ADR2G | 功能描述:功率因数校正 IC PWR FCTR CONTROLLER RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| NCP1606APG | 功能描述:功率因数校正 IC LO CST PWR FCTR CONT RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| NCP1606BDR2G | 功能描述:功率因数校正 IC PWR FCTR CONTROLLER RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| NCP1606BOOSTGEVB | 功能描述:电源管理IC开发工具 OSPI NCP1606 100 W BOOST 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 |
发布紧急采购，3分钟左右您将得到回复。