参数资料
型号: NCP5222GEVB
厂商: ON Semiconductor
文件页数: 12/28页
文件大小: 0K
描述: BOARD EVAL NCP5222 SYNC BUCK
设计资源: NCP5222GEVB Schematic
NCP5222GEVB Test Procedure
NCP5222GEVB Bill of Materials
NCP5222GEVB Gerber Zip
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: 1.05V,1.05V
电流 - 输出: 18A,18A
稳压器拓扑结构: 降压
频率 - 开关: 300kHz
板类型: 完全填充
已供物品:
已用 IC / 零件: NCP5222
其它名称: NCP5222GEVB-ND-ND
NCP5222GEVBOSOS
NCP5222
a negative ? temperature ? coefficient (NTC) thermistor may
be connected with C CS in parallel.
FB
CLK
S
Q
PWM
Ramp
R
_
Q
L
Rcs1
CS+
Vref
Error
Amplifier
PWM
Comparator
DCR
Ccs
Rcs2
CS ?
1
OC
Figure 8. PWM Output Regulation
30mV
Figure 7. Current Sensing Network and Overcurrent
Protection
Output Regulation in Dual ? Channel Mode
In dual ? channel operation mode, the two channels
regulate their output voltage individually. As shown in
Figure 9, the output voltage is programmed by external
feedback resistors.
Output Regulation
As shown in Figure 8, with a high gain error amplifier and
V o + 1 )
R 1
R 4
@ V ref
(eq. 4)
an accurate internal reference voltage, the NCP5222
regulates average DC value of the output voltage to a design
target by error integration function. The output has good
accuracy over full ? range operation conditions and external
component variations.
R1
where Vref is an internal 0.8 V reference voltage.
R4
FB
COMP
PWM1
SWN
L
Vo
0.8V
Figure 9. PWM Output Regulation in Dual ? Channel Mode
C
Output Regulation in Two ? Phase Mode
Figure 10 shows a block diagram for explanation of the
output regulation in the two ? phase mode. Under the
I Share +
V O2 * V O1
R ON_S
(eq. 5)
two ? phase configuration, a MOSFET SSH called sharing
switch is employed to connect two power rails V O1 and V O2 .
where R ON_S is on resistance of S SH .
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