参数资料
型号: LT3781IG#TRPBF
厂商: Linear Technology
文件页数: 15/20页
文件大小: 0K
描述: IC REG CTRLR ISO PWM CM 20-SSOP
标准包装: 1,800
PWM 型: 电流模式
输出数: 2
频率 - 最大: 700kHz
占空比: 100%
电源电压: 8 V ~ 72 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 20-SSOP(0.209",5.30mm 宽)
包装: 带卷 (TR)
LT3781
APPLICATIO S I FOR ATIO
Effective grounding can be achieved by considering the
return current paths from the sense resistor to each
respective bypass capacitor. Don’t be tempted to run
small traces to separate the grounds. A power ground
plane is important as always in high power converters, but
bypass elements must be oriented such that transient
currents in the return paths of V IN and V CC do not mix. Care
must be taken to keep these transients away from the
SGND reference. An effective approach is to use a 2-layer
ground plane, reserving an entire layer for SGND. The
5V REF and nonisolated converter output bypasses can
then be directly connected to the SGND plane.
V BST
V IN
LT3781
V BST
BSTREF
V CC
V CC
5V REF
SGND
PGND
Figure 6. High-Current Transient Return Paths
3781f
15
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