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ADM1041 データシート(PDF) 9 Page - Analog Devices

部品番号 ADM1041
部品情報  Secondary-Side Controller with Current Share and Housekeeping
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
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ADM1041 データシート(HTML) 9 Page - Analog Devices

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ADM1041
Rev. A | Page 9 of 64
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
CURRENT LIMIT ERROR AMPLIFIER
See Figure 13
Current Limit Trim Range2
105
130
%
After ISHARE calibration
Current Limit Trim Step
1.1
%
Current Limit Trim Step
26.5
mV
2.0 ≤ VSHARE ≤ 2.8 V typ. 5 bits, 31 steps.
Reg 04h[7:3]. See Table 13.
Transconductance
100
200
300
µA/V
ICCMP = ±20 µA. See Figure 12.
Output Source Current
40
µA
VCCMP = > 1 V
Output Sink Current
40
µA
VCCMP = < VDD – 1 V
CURRENT SHARE DRIVER
See Figure 14.
Output Voltage6
VDD – 0.4
V
RL = 1 kΩ, VSHRS ≤ VDD – 2 V
Short Circuit Source Current
55
mA
Source Current
15
mA
Current at which VOUT does not drop
by more than 5%
Sink Current
60
100
µA
VSHARE = 2.0 V
CURRENT SHARE DIFFERENTIAL SENSE
AMPLIFIER
See Figure 14.
VS– Input Voltage
0.5
V
Voltage on Pin 20
VSHRS Input Voltage
VDD – 2
V
Voltage on Pin 23
Input Impedance2
65
100
kΩ
VSHRS = 0.5 V, VS− = 0.5 V
Gain
1.0
V/V
CURRENT SHARE ERROR AMPLIFIER
Transconductance, SHRS to SCMP
100
200
300
µA/V
ISCMP = ±20 µA
Output Source Current
40
µA
VSCMP > 1 V
Output Sink Current
40
µA
VSCMP < VDD – 1 V
Input Offset Voltage
40
50
60
mV
Master/slave arbitration
Share OK Window Comparator Threshold
SHRS = 2 V ± SHRTHRESH
(Share Drive Error)
±100
mV
Reg 04h[1:0] = 00. See Table 13.
±200
mV
Reg 04h[1:0] = 01. See Table 13.
±300
mV
Reg 04h[1:0] = 10. See Table 13.
±400
mV
Reg 04h[1:0] = 11. See Table 13.
CURRENT LIMIT
Figure 10.
Current Limit Control Lower Threshold
1.3
V
VCCMP = 0.7 V, VS+ = 1.5 V
Current Limit Control Upper Threshold
3.5
V
VS+ = 0 V, VSCMP = 0 V
CURRENT SHARE CAPTURE
VSCMP = 3.5 V.
Current Share Capture Range
0.7
1
1.3
%
Reg 10h[5:4] = 00. See Table 25.
1.4
2
2.6
%
Reg 10h[5:4] = 01. See Table 25.
2.1
3
3.9
%
Reg 10h[5:4] = 10. See Table 25.
2.8
4
5.2
%
Reg 10h[5:4] = 11. See Table 25.
Capture Threshold
0.6
1.0
1.4
V
FET OR GATE DRIVE
Open-drain N-channel FET
Output Low Level (On)
0.4
V
IIO = 5 mA
0.8
V
IIO = 10 mA
Output Leakage Current
−5
+5
µA
REVERSE VOLTAGE COMPARATOR, FS, FD
VCS− = FS
Common-Mode Range
0.25
2.0
VDD – 2
V
Voltage set by CS resistor divider
Voltage on CS− pin. TA = 25°C.


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