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ADM1171 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 ADM1171은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 ADM1171 기능
기능 Hot Swap Controller
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ADM1171 데이터시트, 핀배열, 회로
Data Sheet
2.7 V to 16.5 V Hot Swap Controller
with Current Sense Output
ADM1171
FEATURES
Controls supply rails from 2.7 V to 16.5 V
Allows protected board removal and insertion to a live
backplane
External sense resistor provides adjustable analog current
limit with circuit breaker
Peak fault current limited with fast response
Charge pumped gate drive for external N-FET switch
Current sense output
Soft start inrush current control
Automatic retry or latch-off during current fault
Undervoltage lockout
8-lead, TSOT package
APPLICATIONS
Hot swap board insertion: line cards, raid systems
Industrial high-side switches/circuit breakers
Electronic circuit breakers
GENERAL DESCRIPTION
The ADM1171 is a hot swap controller that safely enables a
printed circuit board to be removed and inserted to a live
backplane. This is achieved using an external N-channel power
MOSFET with a current control loop that monitors the load
current through a sense resistor. An internal charge pump is
used to enhance the gate of the N-channel FET. When an
overcurrent condition is detected, the gate voltage of the FET is
reduced to limit the current flowing through the sense resistor.
During an overcurrent condition, the TIMER cap determines
the amount of time the FET remains at a current limiting mode
of operation until it is shut down. The ON (ON-CLR) pin is the
enable input for the device and can be used to monitor the
input supply voltage. The ADM1171 operates with a supply
voltage ranging from 2.7 V to 16.5 V.
The ADM1171 features soft start to provide the user with a
capacitor programmable ramping reference to the internal
current sense comparator. This provides a linearly increasing
current limit at startup at a rate set by CSS. This helps to reduce
and limit large inrush currents.
The ADM1171 also features a current sense output (CSOUT)
pin. The voltage on the CSOUT pin represents the voltage drop
across the sense resistor gained up by a factor of 20.
This device is available in two options: the ADM1171-1 with
automatic retry for overcurrent fault and the ADM1171-2 with
latch-off for an overcurrent fault. Toggling the ON (ON-CLR)
pin resets a latched fault. The ADM1171 is packaged in an
8-lead TSOT.
VIN = 5V
GND
FUNCTIONAL BLOCK DIAGRAM
LONG
RSENSE
Q1
VCC SENSE
VOUT = 5V
CLOAD
SHORT RON1
GATE
ADM1171-1
ON
RON2
LONG
SS
CSS CSOUT
TIMER
GND
CTIMER
GND
Figure 1.
Rev. A
Document Feedback
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responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2006–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com




ADM1171 pdf, 반도체, 판매, 대치품
Data Sheet
ADM1171
SPECIFICATIONS
VCC = 2.7 V to 16.5 V, TA = −40°C to +85°C, typical values at TA = 25°C, unless otherwise noted.
Table 1.
Parameter
Symbol Min Typ Max Unit Conditions
VCC PIN
Operating Voltage Range
Supply Current
Undervoltage Lockout
Undervoltage Lockout Hysteresis
ON (ON-CLR) PIN
VCC 2.7
16.5 V
ICC
0.65 0.8
mA
VUVLO
2.4 2.525 2.65 V
VCC rising
VUVLOHYS
40
mV
Input Current
Threshold
Threshold Hysteresis
SENSE PIN
Hot Swap Operating Range
IINON
VON
VONHYST
−1 0
1.22 1.3
50
2.7
+1 µA
1.38 V
ON rising
mV
16.5 V
Input Current
Circuit Breaker Limit Voltage
GATE PIN
Drive Voltage
Pull-Up Current
Pull-Down Current
Pull-Down Current
TIMER PIN
Pull-Up Current
Pull-Down Current
Threshold High
Threshold Low
SS PIN
Soft Start Pull-up Current
IINSENSE
VCB
VGATE
ITIMERUP
ITIMERDN
VTIMERH
VTIMERL
5 10
44 50
4.6 7.5
6.0 8
8.75 10
7.5 9
5.56 8
−6.5 −12
4
25
−2 −5
−25 −60
2
100
1.22 1.3
0.15 0.2
10
15 µA
56 mV VCB = (VCC − VSENSE)
10
12
12
12
12
−14.5
V
V
V
V
V
μA
mA
mA
VGATE − VCC, VCC = 3.0 V
VGATE − VCC, VCC = 3.3 V
VGATE − VCC, VCC = 5 V
VGATE − VCC, VCC = 12 V
VGATE − VCC, VCC = 15 V
VGATE = 0 V
VGATE = 3 V, VCC = 5 V, ON (ON-CLR) = low
VGATE = 3 V, VCC < UVLO
−8.5
−100
3.5
1.38
0.25
µA
µA
µA
µA
V
V
Initial cycle, VTIMER = 1 V
During current fault, VTIMER = 1 V
After Cct breaker tip, VTIMER = 1 V
Normal operation, VTIMER = 1 V
TIMER rising
TIMER falling
µA
Current Setting Gain
Soft Start Completion Voltage
Pull-Down Current
20 V/V VSS/VSENSE
1V
50 µA During fault
CSOUT PIN
Total Output Voltage Error
Gain
Gain Accuracy
Offset
Output Impedance
−5 0
20
0
±1
14
+5 % VCC − SENSE = 50 mV
V/V VCC − SENSE = 10 mV to 50 mV
±2.5 %
mV
kΩ
tOFF
Turn-Off Time (TIMER Rise to GATE Fall)
Turn-Off Time (ON Fall to GATE Fall)
Turn-Off Time (VCC Fall to IC Reset)
2 µs VTIMER = 0 V to 2 V step, VCC = VON = 5 V
40 µs VON = 5 V to 0 V step, VCC = 5 V
40 µs VCC = 5 V to 2 V step, VON = 5 V
Rev. A | Page 3 of 16

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ADM1171 전자부품, 판매, 대치품
ADM1171
TYPICAL PERFORMANCE CHARACTERISTICS
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0 2 4 6 8 10 12 14 16
SUPPLY VOLTAGE (V)
Figure 4. Supply Current vs. Supply Voltage (GATE off)
18
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 2 4 6 8 10 12 14 16
SUPPLY VOLTAGE (V)
Figure 5. Supply Current vs. Supply Voltage (GATE on)
18
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50
VCC = 12V
VCC = 15V
VCC = 5V
VCC = 3V
–25 0
25 50 75 100 125
TEMPERATURE (°C)
Figure 6. Supply Current vs. Temperature
150
Data Sheet
2.65
2.63
VCC = 5V
2.61
VCC RISING
2.59
2.57
2.55
VCC FALLING
2.53
2.51
2.49
2.47
2.45
–50
–25 0
25 50 75 100 125
TEMPERATURE (°C)
Figure 7. UVLO Threshold vs. Temperature
150
25
20
15
10
5
0
0 2 4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (V)
Figure 8. GATE Voltage vs. Supply Voltage
25
VCC = 15V
20
VCC = 12V
15
VCC = 5V
10
VCC = 3V
5
0
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
Figure 9. GATE Voltage vs. Temperature
Rev. A | Page 6 of 16

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