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| 型号： | LM2588T-3.3/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 30/38页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG 3.3V TO220-7 |
| 产品培训模块： | SIMPLE SWITCHER® Regulators |
| 标准包装： | 45 |
| 系列： | SIMPLE SWITCHER® |
| 类型： | 升压（升压），回扫，正向转换器 |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 输入电压： | 4 V ~ 40 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 100kHz ~ 200kHz |
| 电流 - 输出： | 5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-7 成形引线 |
| 包装： | 管件 |
| 供应商设备封装： | TO-220-7 |
| 配用： | 551011367-051-ND - BOARD WEBENCH BUILD IT LM2586/88 |
| 其它名称： | *LM2588T-3.3 *LM2588T-3.3/NOPB LM2588T-3.3 |
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SNVS117D – APRIL 1998 – REVISED APRIL 2013
(7)
V IN is the minimum input voltage, V OUT is the output voltage, N is the transformer turns ratio, D is the duty cycle,
and I LOAD is the maximum load current (and ∑ I LOAD is the sum of the maximum load currents for multiple-output
flyback regulators). The duty cycle is given by:
Boost:
(8)
where V F is the forward biased voltage of the diode and is typically 0.5V for Schottky diodes and 0.8V for fast
recovery diodes. V SAT is the switch saturation voltage and can be found in the Characteristic Curves.
When no heat sink is used, the junction temperature rise is:
Δ T J = P D ? θ JA .
(9)
Adding the junction temperature rise to the maximum ambient temperature gives the actual operating junction
temperature:
T J = Δ T J + T A .
(10)
If the operating junction temperature exceeds the maximum junction temperatue in item 3 above, then a heat
sink is required. When using a heat sink, the junction temperature rise can be determined by the following:
Δ T J = P D ? ( θ JC + θ Interface + θ Heat Sink )
Again, the operating junction temperature will be:
T J = Δ T J + T A
(11)
(12)
As before, if the maximum junction temperature is exceeded, a larger heat sink is required (one that has a lower
thermal resistance).
Included in the Switchers Made Simple ? design software is a more precise (non-linear) thermal model that can
be used to determine junction temperature with different input-output parameters or different component values.
It can also calculate the heat sink thermal resistance required to maintain the regulator junction temperature
below the maximum operating temperature.
To further simplify the flyback regulator design procedure, Texas Instruments is making available computer
design software Switchers Made Simple ?. Software is available on a (3? ″ ) diskette for IBM compatible
computers from a Texas Instruments sales office in your area or the Texas Instruments Customer Response
Center (1-800-272-9959).
30
Product Folder Links: LM2588
Copyright ? 1998–2013, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2588T-5.0 | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2588T-5.0/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2588T50 | 制造商:Texas Instruments 功能描述:SWITCHING REG 5A 5.0V 2588 TO-220 |
| LM2588T-ADJ | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2588T-ADJ | 制造商:Texas Instruments 功能描述:SWITCHING REG 5A ADJ 2588 TO2207 |
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