参数资料
型号: LM2588T-3.3/NOPB
厂商: National Semiconductor
文件页数: 27/38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:
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
SNVS117D – APRIL 1998 – REVISED APRIL 2013
Figure 57. Boost Regulator
Figure 58. Flyback Regulator
FLYBACK REGULATOR INPUT CAPACITORS
A flyback regulator draws discontinuous pulses of current from the input supply. Therefore, there are two input
capacitors needed in a flyback regulator—one for energy storage and one for filtering (see Figure 58 ). Both are
required due to the inherent operation of a flyback regulator. To keep a stable or constant voltage supply to the
LM2588, a storage capacitor ( ≥ 100 μ F) is required. If the input source is a recitified DC supply and/or the
application has a wide temperature range, the required rms current rating of the capacitor might be very large.
This means a larger value of capacitance or a higher voltage rating will be needed for the input capacitor. The
storage capacitor will also attenuate noise which may interfere with other circuits connected to the same input
supply voltage.
In addition, a small bypass capacitor is required due to the noise generated by the input current pulses. To
eliminate the noise, insert a 1.0 μ F ceramic capacitor between V IN and ground as close as possible to the device.
SWITCH VOLTAGE LIMITS
In a flyback regulator, the maximum steady-state voltage appearing at the switch, when it is off, is set by the
transformer turns ratio, N, the output voltage, V OUT , and the maximum input voltage, V IN (Max):
V SW(OFF) = V IN (Max) + (V OUT +V F )/N
(3)
Copyright ? 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM2588
27
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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