参数资料
型号: ADP1043A-USB-Z
厂商: Analog Devices Inc
文件页数: 16/72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
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ADP1043AACPZ-RLTR-ND - IC SECONDARY SIDE CTRLR 32LFCSP
ADP1043A
Accurate OrFET control also uses the reverse voltage across the
CS2+ and CS2? pins to disable the OrFET (see Figure 16). If the
voltage difference between CS2+ and CS2? is greater than 0 mV,
the OrFET is disabled. The accurate OrFET circuit is more accu-
rate, but it is slower than the fast OrFET circuit.
The OrFET turn-on circuit looks at the voltage difference
between VS1 and VS2 (see Figure 16). When the forward
Recommended Setup
In a 12 V application, while in normal operating mode
? When 12 V < V OUT < OVP, use the accurate OrFET control
circuit to turn off the OrFET.
? When V OUT > OVP, use load OVP to turn off the OrFET.
In a 12 V application, while in light load mode
voltage drop from VS1 to VS2 is greater than the program-
mable OrFET enable threshold (Register 0x30[5:4]), the
OrFET is enabled. The OrFET enable threshold can be set to
?0.5%, 0%, 1%, or 2% of the nominal output voltage (12 V).
?
?
When 12 V < V OUT < OVP, use ACSNS to turn off the
OrFET.
When V OUT > OVP, use load OVP to turn off the OrFET.
In a 12 V application, when an internal short circuit occurs,
follow this procedure:
R SENSE
1.
2.
Use fast OrFET to turn off the OrFET.
Use CS1 OCP or VS1 UVP to shut down the unit and
restart it.
12V
V OUT
10k ?
10k ?
11k ?
DRIVER
11k ?
1k ?
1k ?
CS2–
CS2+
VS1
VS2
GATE
OrFET
ENABLE
S
Q
R
OrFET ENABLE
THRESHOLD
REG 0x30[5:4]
FAST OrFET
DEBOUNCE
DIFFERENTIAL
TO SINGLE-
ENDED FAST OrFET
COMPARATOR REG 0x30[1]
FAST OrFET
THRESHOLD
REG 0x30[3:2]
CS2 ADC
FAST OrFET
BYPASS
REG 0x30[0]
ACCURATE
OrFET
OrFET
DISABLE
DIFFERENTIAL
TO SINGLE-
ENDED
ACCURATE OrFET
THRESHOLD
DISABLE
FLAG
FLAGS
REG 0x30[7:6]
100μA
100μA
CS2 VALUE
REGISTER
REG 0x18[15:4]
Figure 16. OrFET Control Circuit Internal Detailed Diagram
Rev. 0 | Page 16 of 72
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