参数资料
| 型号： | SC410MLTRT |
| 厂商： | Semtech |
| 文件页数： | 21/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3A 10MLPD |
| 标准包装： | 1 |
| 系列： | EcoSpeed® |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.75 V ~ 7.5 V |
| 输入电压： | 5.5 V ~ 24 V |
| 频率 - 开关： | 200kHz ~ 1MHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-MLPD（3x3） |
| 其它名称： | SC410MLDKR |
SC410
Applications Information (continued)
The output inductor value may change with current. This
will change the output ripple and therefore will have a
minor effect on the DC output voltage. The output ESR
also affects the output ripple and thus has a minor effect
on the DC output voltage.
Switching Frequency Variation
The switching frequency will vary depending on line and
load conditions. The line variations are a result of fixed
propagation delays in the on-time one-shot, as well as
unavoidable delays in the power FET switching. As V IN
increases, these factors make the actual DH on-time
slightly longer than the ideal on-time. The net effect is
that frequency tends to fall slightly with increasing input
voltage.
The switching frequency also varies with load current as a
result of the power losses in the MOSFETs and the induc-
tor. For a conventional PWM constant-frequency con-
verter, as load increases the duty cycle also increases
slightly to compensate for IR and switching losses in the
MOSFETs and inductor. An adaptive on-time converter
must also compensate for the same losses by increasing
the effective duty cycle (more time is spent drawing
energy from V IN as losses increase). The on-time is essen-
tially constant for a given V OUT and V IN combination, to
offset the losses the off-time will tend to reduce slightly as
load increases. The net effect is that switching frequency
increases slightly with increasing load.
21
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| SC411 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Synchronous Buck Pseudo-Fixed Frequency Power Supply Controller |
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