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参数资料
| 型号： | NCP5222GEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 10/28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： | 板 |
| 已用 IC / 零件： | NCP5222 |
| 其它名称： | NCP5222GEVB-ND-ND NCP5222GEVBOSOS |
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NCP5222
General
The NCP5222, a fast ? transient ? response and
high ? efficiency dual ? channel / two ? phase buck controller
with builtin gate drivers, provides multifunctional power
solutions for notebook power system. 180 ° interleaved
operation between the two channels / phases has a capability
of reducing cost of the common input capacitors and
improving noise immunity. The interleaved operation also
can reduce cost of the output capacitors with the two ? phase
configuration. Input supply voltage feedforward control is
employed to deal with wide input voltage range. On ? line
programmable and automatic power ? saving control ensures
high efficiency over entire load range. Fast transient
response reduces requirement on the output filters. In the
dual ? channel operation mode, the two output power rails are
regulated individually. In the two ? phase operation mode,
the two output power rails are connected together by an
external switch and current ? sharing control is enabled to
balance power delivery between phases.
Dual ? Channel Mode or Two ? Phase Mode
The NCP5222 can be externally configured to be working
in dual ? channel operation mode or two ? phase operation
mode. In the dual ? channel operation mode, the two output
power rails are regulated individually. In the two ? phase
operation mode, the two output power rails are connected
together by an external switch and current ? sharing control
is enabled to balance power delivery between phases.
Figure 5 shows two typical external configurations. In
Figure 5(a), the controller is configured to operate in the
dual ? channel mode by connecting the pin DRVS with the
pin V CCP . In Figure 5(b), the controller is configured to
operate in the two ? phase mode. In this mode, an external
MOSFET SSH is employed to connect the two output power
rails together, and the pin DRVS of the NCP5222 provides
driving signal to SSH. Two filter capacitors CCS1 and
CICS2 are connected with two current ? sense output pins
ICS1 and ICS2, respectively. A typical timing diagram is
shown in Figure 6.
C ICS2
C I CS1
7
1
7
1
NCP5222
18 19
S SH
Vo2
NCP5222
18 19
S SH
Vo1
( a ) Dual ? C hannel
( b ) Two ? Phas e
Figure 5. Mode Configurations
Mode Detection
In the initial stage of the IC powering up, there is mode
detection period to read the external setup just after V IN and
V CC are both ready and at least one of ENs is enabled. In
Figure 6, V IN and V CC are powered up first. At 3.5 us after
EN2 goes high, a 53 m s mode detection period starts. The
DRVS pin is pulled down by an internal 2 k W . At the end of
the mode detection, if the DRVS is higher than V CCP ? 0.5 V
the system goes to the dual ? channel mode and leaves DRVS
high impedance. If the DRVS is lower than V CCP ? 0.5 V, the
system goes to the two ? phase mode and the DRVS pin is
pulled down to PGND1 by an internal 10 W FET.
DRVS Softstart in Two ? Phase Mode
In the two ? phase mode, the DRVS softstart begins after
the both PGOOD1 and PGOOD2 become valid. During the
DRVS softstart, 1 mA current is sourced out from the DRVS
pin and thus voltage in DRVS is ramping up. The DRVS
soft ? start is complete after the DRVS voltage is higher than
V CCP ? 0.2 V, and then the DRVS pin is pulled up to V CCP
by an internal 20 W FET.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5222MNR2G | 功能描述:DC/DC 开关控制器 DUAL SYN BUCK CONTROLLER RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP5228 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Synchronous Buck Controller with Auto Power Saving |
| NCP5228MNTWG | 制造商:ON Semiconductor 功能描述:Notebook DDR Controller |
| NCP5230 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Precise Low Voltage Synchronous Buck |
| NCP5230MNTWG | 功能描述:DC/DC 开关控制器 BUCK CONTROLLER RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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