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参数资料
| 型号： | ADP1043A-USB-Z |
| 厂商： | Analog Devices Inc |
| 文件页数： | 25/72页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD DIG POWER SUPPLY |
| 标准包装： | 1 |
| 附件类型： | 连接 USB 至 I2C 的接收器 |
| 适用于相关产品： | ADP1043A |
| 相关产品： | ADP1043AACPZ-RLDKR-ND - IC SECONDARY SIDE CTRLR 32LFCSP ADP1043AACPZ-RLCT-ND - IC SECONDARY SIDE CTRLR 32LFCSP ADP1043AACPZ-RLTR-ND - IC SECONDARY SIDE CTRLR 32LFCSP |
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ADP1043A
CONSTANT CURRENT MODE
The ADP1043A can be configured to operate in constant
current mode. The threshold to enter constant current mode
operation is 10% current below the CS2 accurate OCP setting.
Below this current, the part operates normally, using the output
voltage as the feedback signal for closed-loop operation.
When the ADP1043A reaches the constant current mode
threshold, a flag is set. The CS2 current reading is used instead
of the output voltage as the feedback signal for closed-loop
operation. The output voltage is ramped down linearly to 60%
of its nominal value as the load resistance decreases to ensure
that the current remains constant.
When the control loop reaches 60% of V OUT , the part again uses
the output voltage to close the loop, but at the reduced level
(60% of nominal). If the load resistance continues to decrease,
the current may rise again in this region, up to the CS2 OCP
level, but the voltage is kept limited to 60% of nominal (see
Figure 30). The UVP or CS2 OCP flags can be used to program
a shutdown action.
V OUT
OVERVOLTAGE PROTECTION (OVP)
The ADP1043A has two OVP circuits. If the output voltage at
the VS1, VS2, or VS3 pin exceeds the programmable threshold
for that pin, that OVP flag is set; the response to that flag can be
programmed. VS1 has one OVP circuit. VS2 and VS3 share the
other OVP circuit. The OVP circuits can be programmed for
different OVP thresholds. See Register 0x32 and Register 0x33
for more information. The formula to set the OVP threshold
voltage is given by
VSx OVP = [(89 + VS1_OVP_Setting )/128] × 1.55 V
For example, when the VS1 OVP setting = 10, then
VS1 OVP = [(89 + 10)/128] × 1.55 V = 1.2 V
UNDERVOLTAGE PROTECTION (UVP)
If the voltage being sensed at the VS1 pin goes below the pro-
grammable UVP threshold, the UVP flag is set. Exceptions
to this rule (called undervoltage blanking) include during
startup and when ACSNS is not within limits. The response
to the UVP condition is programmable (see Register 0x34 in
V OUT NOMINAL
V OUT × 60%
I OUT
OCP
OCP × 90%
Figure 30. Constant Current Mode (V OUT vs. I OUT )
Rev. 0 | Page 25 of 72
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相关代理商/技术参数 |
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|---|---|
| ADP1043-EVALZ | 制造商:Analog Devices 功能描述:EVALUATION BOARDS - Bulk |
| ADP1043FB100-EVALZ | 制造商:Analog Devices 功能描述:ADP1043 100W EVALUATION BOARD |
| ADP1045ACPZ-RL | 制造商:Analog Devices 功能描述: |
| ADP1046 | 制造商:AD 制造商全称:Analog Devices 功能描述:Digital Controller for Isolated |
| ADP1046-100-EVALZ | 功能描述:BOARD EVAL FOR ADP1046-100 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
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