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参数资料
| 型号： | LM5045SQX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 540 kHz SWITCHING FREQ-MAX, QCC28 |
| 封装： | 5 X 5 MM, LLP-28 |
| 文件页数： | 17/28页 |
| 文件大小： | 610K |
| 代理商： | LM5045SQX |
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CURRENT SENSE
The CS pin receives an input signal representative of its
transformer’s primary current, either from a current sense
transformer or from a resistor located at the junction of source
pin of the primary switches, as shown in Figure 18 and Figure
19 respectively. In both the cases, the filter components R
F
and C
F should be located as close to the IC as possible, and
the ground connection from the current sense transformer, or
R
SENSE should be a dedicated trace to the appropriate GND
pin. Please refer to the layout section for more layout tips.
The current sense components must provide a signal >
710mV at the CS pin during an over-load event. Once the
voltage on the CS pin crosses the current limit threshold, the
current sense comparator terminates the PWM pulse and
starts to charge the RES pin. Depending on the configuration
of the RES pin, the LM5045 will eventually initiate a hiccup
mode restart or be in continuous current limit.
30145415
FIGURE 18. Transformer Current Sense
30145422
FIGURE 19. Resistor Current Sense
www.national.com
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LM5045
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM5045SQX/NOPB | 功能描述:IC PWM CTRLR FULL BRIDG 28LLP RoHS:是 类别:集成电路 (IC) >> PMIC - AC-DC 转换器，离线开关 系列:PowerWise® 标准包装:1 系列:FPS™ 输出隔离:隔离 频率范围:61kHz ~ 73kHz 输入电压:8 V ~ 26 V 输出电压:650V 功率（瓦特）:12W 工作温度:-40°C ~ 115°C 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-MDIP 包装:Digi-Reel® 其它名称:FSL206MRBNFSDKR |
| LM5046 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Input operating range: 36V to 75V Line UVLO (34V/32V on/off) |
| LM5046_1 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Input operating range: 36V to 75V Line UVLO (34V/32V on/off) |
| LM5046EVAL/NOPB | 功能描述:电源管理IC开发工具 LM5046 Eval Brd 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 |
| LM5046MH | 制造商:Texas Instruments 功能描述:CTLR, FULL BRIDGE, PWM, 28TSSOP 制造商:Texas Instruments 功能描述:CTLR, FULL BRIDGE, PWM, 28TSSOP; Input Voltage:100V; Supply Voltage Min:12.5V; Supply Voltage Max:30V; Digital IC Case Style:TSSOP; No. of Pins:28; Frequency:2MHz; Operating Temperature Min:-40C; Operating Temperature Max:125C; ;RoHS Compliant: Yes |
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