参数资料
型号: NCP3121QPBCKGEVB
厂商: ON Semiconductor
文件页数: 22/41页
文件大小: 0K
描述: EVAL BOARD FOR NCP3121QPBCKG
设计资源: NCP3121 EVB BOM
NCP3121QPBCKGEVB Gerber Files
NCP3121QPBCKGEVB Schematic
标准包装: 1
主要目的: DC/DC,步降
输出及类型: 2,非隔离
输出电压: 3.3V,5V
电流 - 输出: 3A,3A
输入电压: 12V
稳压器拓扑结构: 降压
板类型: 完全填充
已供物品:
已用 IC / 零件: NCP3121
其它名称: NCP3121QPBCKGEVBOS
NCP3121
Daisy Chain Operation
The last ? up/first ? down power output has its SEQ pin tied
to the EN of the first ? up/last ? down power output. Each
output in the chain has its power ? up delay set by the
soft ? start ramp ? up of the supply. This feeds its EN and its
power ? down delay set by the soft ? start ramp ? down of the
supply that feeds its SEQ pin.
ENABLE
SEQ
SS
C1
SEQ
SS
C2
SEQ
SS
C3
SEQ
SS
C4
DISABLE
EN
NCP3121
TRACK
EN
NCP3121
TRACK
EN
NCP3121
TRACK
EN
NCP3121
TRACK
Vout1
C1 C2
C3 C4
C4 C3
C2 C1
Vout2
Vout3
Vout4
Figure 45. Simplified Drawing of Daisy ? chained NCP3121’s
When the first voltage rail has reached a specific voltage
level, the next voltage rail is enabled and its rise is monitored
until it has reached the power good trip point. At this point,
voltage rails have been enabled (see Figure 46).
Power ? down sequencing is just the opposite of the
power ? up sequence.
the next voltage rail is enabled. This continues until all
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