AD8218_13 [ADI]
Zero Drift, Bidirectional Current Shunt Monitor; 零漂移，双向电流分流监控器
| 型号： | AD8218_13 |
| 厂家： | 
ADI |
| 描述： | Zero Drift, Bidirectional Current Shunt Monitor |
| 文件： | 总16页 (文件大小：361K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Zero Drift, Bidirectional
Current Shunt Monitor
Data Sheet
AD8218
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
S
High common-mode voltage range
4 V to 80 V operating
R4
AD8218
−0.3 V to +85 V survival
Buffered output voltage
Gain = 20 V/V
Wide operating temperature range: −40°C to +125°C
Excellent ac and dc performance
100 nV/°C typical offset drift
50 µV typical offset
R1
–IN
+IN
OUT
R2
R3
LDO
ENB
GND
REF
5 ppm/°C typical gain drift
110 dB typical CMRR at dc
Figure 1.
APPLICATIONS
High-side current sensing
48 V telecom
Power management
Base stations
Bidirectional motor control
Precision high voltage current sources
GENERAL DESCRIPTION
The AD8218 is a high voltage, high resolution current shunt
amplifier. It features a set gain of 20 V/V, with a maximum
0.35% gain error over the entire temperature range. The
buffered output voltage directly interfaces with any typical
converter. The AD8218 offers excellent input common-mode
rejection from 4 V to 80 V. The AD8218 performs bidirectional
current measurements across a shunt resistor in a variety of
industrial and telecom applications, including motor control,
battery management, and base station power amplifier bias
control.
The AD8218 offers breakthrough performance throughout the
−40°C to +125°C temperature range. It features a zero-drift core,
which leads to a typical offset drift of 100 nV/°C throughout
the operating temperature range and the common-mode voltage
range. Special attention is devoted to output linearity being
maintained throughout the input differential voltage range of
0 mV to ~250 mV. The AD8218 also includes an internal 80 mV
reference that can be enabled for optimal dynamic range in
unidirectional current sense applications. The typical input
offset voltage is 50 µ V.
The AD8218 is offered in an 8-lead MSOP package and an
8-lead LFCSP package.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2011–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
AD8218
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Output Clamping ....................................................................... 10
Application Notes........................................................................... 11
Supply (VS) Connections........................................................... 11
Enable Pin (ENB) Operation.................................................... 11
Applications Information.............................................................. 12
Unidirectional High-Side Current Sensing ............................ 12
Bidirectional High-Side Current Sensing ............................... 12
Motor Control Current Sensing ............................................... 12
Outline Dimensions....................................................................... 13
Ordering Guide .......................................................................... 13
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Pin Configurations and Function Descriptions ........................... 5
Typical Performance Characteristics ............................................. 6
Theory of Operation ...................................................................... 10
Amplifier Core............................................................................ 10
REVISION HISTORY
4/13—Rev. A to Rev. B
Added 8-Lead LFCSP.........................................................Universal
Changes to General Description Section ...................................... 1
Added Figure 3, Renumbered Sequentially .................................. 5
Changes to Table 3 ............................................................................ 5
Added Figure 37.............................................................................. 13
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 13
2/11—Rev. 0 to Rev. A
Changes to Features.......................................................................... 1
1/11—Revision 0: Initial Version
Rev. B | Page 2 of 16
Data Sheet
AD8218
SPECIFICATIONS
TOPR = −40°C to +125°C, TA = 25°C, RL = 25 kΩ (RL is the output load resistor), input common-mode voltage (VCM) = 4 V, unless
otherwise noted.
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
GAIN
Initial
Accuracy
20
0.1
V/V
%
VO ≥ 0.1 V dc, TA
Accuracy over Temperature
Gain vs. Temperature
0.35
%
TOPR
TOPR
5
ppm/°C
VOLTAGE OFFSET
Offset Voltage (RTI1)
Over Temperature (RTI1)
Offset Drift
200
300
µV
µV
nV/°C
25°C
TOPR
TOPR
100
130
INPUT
Bias Current2
µA
µA
V
mV
dB
TA, input common mode = 4 V, VS = 4 V
TOPR, input common mode = 4 V, VS = 4 V
Common-mode continuous
Differential input voltage
TOPR
220
80
250
Common-Mode Input Voltage Range
Differential Input Voltage Range3
Common-Mode Rejection (CMRR)
4
0
90
110
OUTPUT
Output Voltage Range Low
Output Voltage Range High
Output Impedance
0.01
V
V
Ω
VS − 0.1
+150
TA
2
INTERNAL REFERENCE (ENB PIN CONNECTED TO GND)
Initial Value
Voltage at OUT with a differential input of
0 V and a common-mode input of 4 V
80
mV
Offset (RTI1)
Offset Drift (RTO4)
−150
µV
µV/°C
VS = NC or VS = 5 V
10
REFERENCE INPUT (REF, PIN 7)
Input Impedance
Input Current
Input Voltage Range
Input-to-Output Gain
DYNAMIC RESPONSE
Small-Signal −3 dB Bandwidth
Slew Rate
1.5
MΩ
µA
V
Dependent on VREF/1.5 MΩ
ENB not connected to GND
3
0
60
5
1
0.0001
V/V
450
1
kHz
V/µs
NOISE
0.1 Hz to 10 Hz (RTI1)
Spectral Density, 1 kHz (RTI1)
POWER SUPPLY
2.3
110
µV p-p
nV/√Hz
Operating Range (Pin 2 Floating)
4
4
80
V
V
Power regulated from common mode,
VS pin floating
VS Range (Pin 2)
5.5
800
VS must be less than 5.5 V if standalone
supply is used
Quiescent Current over Temperature
Power Supply Rejection Ratio (PSRR)
TEMPERATURE RANGE
µA
dB
Throughout input common mode
TOPR
90
110
For Specified Performance
−40
+125
°C
1 RTI = referred to input.
2 Refer to Figure 9 for more information on the input bias current. This current varies based on the input common-mode voltage. The input bias current flowing to the
+IN pin is also the supply current to the internal LDO.
3 The differential input voltage is specified as 250 mV because the output is internally clamped to 5.2 V. This ensures that the output voltage does not exceed the typical
ADC input range, preventing damage. The AD8218 can survive up to 5 V differentially but will only amplify ~250 mV correctly due to the output clamping function.
4 RTO = referred to output.
Rev. B | Page 3 of 16
AD8218
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Maximum Input Voltage ( +IN, −IN to GND)
Differential Input Voltage (+IN to –IN)
Human Body Model (HBM) ESD Rating
Operating Temperature Range (TOPR
Storage Temperature Range
Output Short-Circuit Duration
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Rating
−0.3 V to +85 V
5 V
2000 V
−40°C to +125°C
−65°C to +150°C
Indefinite
)
ESD CAUTION
Rev. B | Page 4 of 16
Data Sheet
AD8218
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
+IN
1
2
3
4
8
7
6
5
–IN
+IN
1
2
3
4
8
7
6
5
–IN
AD8218
TOP VIEW
(Not to Scale)
V
REF
NC
S
V
REF
NC
S
AD8218
TOP VIEW
(Not to Scale)
ENB
GND
ENB
GND
OUT
OUT
NC = NO CONNECT.
DO NOT CONNECT TO THIS PIN.
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
2. THE EXPOSED PAD NEEDS TO BE CONNECTED TO PIN 4 (GND).
Figure 2. MSOP Pin Configuration
Figure 3. LFCSP Pin Configuration
Table 3. Pin Function Descriptions
Pin No.
Mnemonic
Description
1
2
3
4
5
6
7
8
+IN
VS
ENB
GND
OUT
NC
REF
−IN
Noninverting Input.
Supply Pin. Bypass with a standard 0.1 μF capacitor.
Enable. Connect to GND to enable the internal 80 mV reference.
Ground.
Output.
No Connect. Do not connect to this pin.
Reference Input. Connect to a low impedance voltage.
Inverting Input.
EPAD
Exposed Pad. The exposed pad needs to be connected to Pin 4 (GND). Applies to LFCSP only.
Rev. B | Page 5 of 16
AD8218
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
30
27
24
21
18
15
12
9
40
38
36
34
32
30
28
26
24
6
3
0
1k
10k
100k
1M
–40
–20
0
20
40
60
80
100
120
140
FREQUENCY (Hz)
TEMPERATURE (°C)
Figure 4. Typical Input Offset vs. Temperature
Figure 7. Typical Small-Signal Bandwidth (VOUT = 200 mV p-p)
140
10
9
130
120
110
100
90
8
7
6
5
4
3
2
1
–40°C
+25°C
+125°C
0
80
–1
–2
–3
–4
–5
70
60
50
0
5
10
15
20
25
30
35
40
45
50
100
1000
10k
100k
1M
DIFFERENTIAL INPUT (mV)
FREQUENCY (Hz)
Figure 5. Typical CMRR vs. Frequency
Figure 8. Total Output Error vs. Differential Input Voltage
800
500
450
400
350
300
250
200
150
100
700
600
500
400
300
200
100
0
+IN
–IN
0
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
INPUT COMMON-MODE VOLTAGE (V)
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
Figure 6. Typical Gain Error vs. Temperature
Figure 9. Input Bias Current vs. Input Common-Mode Voltage
(Differential Input Voltage = 5 mV, VS = NC)
Rev. B | Page 6 of 16
Data Sheet
AD8218
500
450
400
350
300
250
200
INPUT
5mV/DIV
OUTPUT
100mV/DIV
1µs/DIV
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
Figure 10. Supply Current vs. Temperature (VS = 5 V, VCM = 12 V)
Figure 13. Fall Time (Differential Input = 10 mV)
INPUT
100mV/DIV
INPUT
5mV/DIV
OUTPUT
2V/DIV
OUTPUT
100mV/DIV
1µs/DIV
5µs/DIV
Figure 11. Rise Time (Differential Input = 10 mV)
Figure 14. Fall Time (Differential Input = 200 mV)
INPUT
200mV/DIV
INPUT
100mV/DIV
OUTPUT
2V/DIV
OUTPUT
2V/DIV
5µs/DIV
5µs/DIV
Figure 12. Rise Time (Differential Input = 200 mV)
Figure 15. Differential Overload Recovery, Rising
Rev. B | Page 7 of 16
AD8218
Data Sheet
9.5
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
INPUT
200mV/DIV
OUTPUT
2V/DIV
5µs/DIV
TEMPERATURE (°C)
Figure 16. Differential Overload Recovery, Falling
Figure 19. Maximum Output Source Current vs. Temperature
5.010
82.0
81.5
81.0
80.5
80.0
79.5
79.0
5.000
4.990
4.980
4.970
4.960
4.950
4.940
4.930
4.920
4.910
4.900
–40
–20
0
20
40
60
80
100
120
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
TEMPERATURE (°C)
OUTPUT SOURCE CURRENT (mA)
Figure 17. Internal Reference Voltage vs. Temperature
Figure 20. Output Voltage Swing from Rail vs. Output Source Current
(VS = 5 V, VS = NC, VCM = 12 V, Pin 1 (+IN) and Pin 8 (−IN) Shorted, Pin 3 (ENB)
Shorted to Pin 4 (GND))
12.0
11.5
11.0
10.5
10.0
9.5
250
200
150
100
50
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
–40 –30 –20 –10
0
10 20 30 40 50 60 70 80 90 100 110 120
TEMPERATURE (°C)
OUTPUT SINK CURRENT (mA)
Figure 18. Maximum Output Sink Current vs. Temperature
Figure 21. Output Voltage Range from GND vs. Output Sink Current
Rev. B | Page 8 of 16
Data Sheet
AD8218
500
400
300
200
100
0
INPUT
50V/DIV
OUTPUT
1V/DIV
500ns/DIV
–4
–3
–2
–1
0
1
2
3
4
GAIN DRIFT (ppm/°C)
Figure 22. Common-Mode Step Response, Rising
Figure 25. Gain Drift Distribution
140
120
100
80
INPUT
50V/DIV
OUTPUT
1V/DIV
60
40
20
0
–0.6
1µs/DIV
–0.4
–0.2
0
0.2
0.4
0.6
OFFSET DRIFT (µV/°C)
Figure 26. Input Offset Drift Distribution
Figure 23. Common-Mode Step Response, Falling
180
150
120
90
250
200
150
100
50
60
30
0
0
–200
–100
0
100
200
–5
0
5
10
15
V
(µV)
INTERNAL REF OFFSET DRIFT (µV/°C)
OSI
Figure 24. Input Offset Distribution
Figure 27. Internal REF Offset Drift Distribution,
Referred to Output (RTO)
Rev. B | Page 9 of 16
AD8218
Data Sheet
THEORY OF OPERATION
The AD8218 is configured as a difference amplifier. The
transfer function is
AMPLIFIER CORE
In typical applications, the AD8218 amplifies a small differential
input voltage generated by the load current flowing through
a shunt resistor. The AD8218 rejects high common-mode vol-
tages (up to 80 V) and provides a ground-referenced, buffered
output. Figure 28 shows a simplified schematic of the AD8218.
OUT = ((R4/R1) × (V1 − V2)) + VREF
Resistors R4 and R1 are matched to within 0.01% and have
values of 1.5 MΩ and 75 kΩ, respectively, meaning an input-
to-output total gain of 20 V/V for the AD8218. The difference
between V1 and V2 is the voltage across the shunt resistor, or
VIN. Therefore, the input-to-output transfer function of the
AD8218 is
5V
C
F
I
LOAD
GND
V
S
I
CHARGE
R4
OUT (V) = (20 × VIN) + VREF
AD8218
The AD8218 accurately amplifies the input differential signal,
rejecting high voltage common modes ranging from 4 V to 80 V.
–IN
+IN
R1
V
V
2
SHUNT
OUT
LOAD
1
The main amplifier uses a novel zero-drift architecture, providing
the end user with breakthrough temperature stability. The
offset drift is typically less than 100 nV/°C. This performance
leads to optimal accuracy and dynamic range.
R2
4V
R3
LDO
TO
80V
ENB
REF
GND
V
REF
OUTPUT CLAMPING
After the input common-mode voltage in the application is
above 5.2 V, the internal LDO output of the AD8218 also
reaches its maximum value of 5.2 V, which is the maximum
output range of the AD8218. Because in typical applications
the output interfaces with a converter, clamping the AD8218
output voltage to 5.2 V ensures that the ADC input is not
damaged due to excessive overvoltage.
Figure 28. Simplified Schematic
Rev. B | Page 10 of 16
Data Sheet
AD8218
APPLICATION NOTES
SUPPLY (VS) CONNECTIONS
ENABLE PIN (ENB) OPERATION
The AD8218 includes an internal LDO, which allows the user
to leave the VS pin floating, powering the AD8218 directly from
the voltage present at Pin 1 (+IN), provided this voltage is in the
4 V to 80 V range. A typical connection for the part in this
configuration is shown in Figure 29.
The AD8218 includes an internal reference that can be enabled
by connecting Pin 3 (ENB) to ground. This mode of operation
is shown in Figure 31.
I
LOAD
4V
TO
80V
SHUNT
I
I
BATTERY
LOAD
CHARGE
LOAD
–IN
+IN
4V
TO
80V
SHUNT
V
S
BATTERY
REF
LOAD
AD8218
–IN
+IN
OUT
ENB
V
S
REF
2.5V
GND
AD8218
OUT
ENB
GND
Figure 31. Enabling the Internal 80 mV Reference
In this configuration, the internal 80 mV reference is activated,
and the output of the AD8218 is 80 mV when the differential
input voltage is 0 V and the voltage at Pin 7 (REF) is also 0 V. This
internal reference is useful in unidirectional current measurements
where the current being monitored has a very wide range. Setting
the output starting point to 80 mV means that when the load
current through the shunt resistor is 0 A, the output is 80 m V.
This ensures that the output errors due to initial offset and the
output saturation range of the amplifier are overcome. In this
mode, the transfer function of the AD8218 becomes
Figure 29. Operation with No VS Connection
The AD8218 can also be powered from a separate low impedance
supply at Pin 2 (VS); however, this voltage can only be in the 4 V
to 5.5 V range. In cases where the high voltage bus is susceptible
to noise, transients, or high voltage fluctuations and a 5 V supply is
available, the AD8218 can be used in the mode depicted in
Figure 30.
I
I
LOAD
CHARGE
4V
TO
80V
SHUNT
BATTERY
LOAD
OUT (V) = OUT (V) = (20 × VIN) + 0.08 V
–IN
+IN
V
S
REF
If Pin 3 is connected to ground, and therefore the internal
reference is enabled, 80 mV must always be added to the
transfer function of the AD8218.
C
5V
2.5V
F
AD8218
OUT
ENB
GND
Figure 30. 5 V Supply Operation
Rev. B | Page 11 of 16
AD8218
Data Sheet
APPLICATIONS INFORMATION
V
S
UNIDIRECTIONAL HIGH-SIDE CURRENT SENSING
I
LOAD
R4
AD8218
In the unidirectional high-side current sensing configuration,
the shunt resistor is referenced to the battery (see Figure 32).
High voltage is present at the inputs of the current sense amplifier.
When the shunt is battery referenced, the AD8218 produces a
linear ground-referenced analog output. The supply pin, VS, of the
AD8218 can either be connected to a 5 V supply or left floating (see
the Supply (VS) Connections section).
–IN
+IN
R1
V
2
1
SHUNT
OUT
LOAD
V
R2
R3
LDO
2.5V
BATTERY
(4V TO 80V)
ENB
REF
GND
V
S
I
LOAD
R4
AD8218
Figure 34. Bidirectional Operation Using a 2.5 V Reference Input
–IN
+IN
R1
V
2
SHUNT
OUT
LOAD
The output transfer function curve for bidirectional operation
V
1
using a 2.5 V reference input is shown in Figure 35.
R2
R3
LDO
BATTERY
(4V TO 80V)
ENB
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
REF
GND
Figure 32. Unidirectional Operation with ENB Connected to GND
The output transfer function curve for unidirectional operation
with ENB connected to GND is shown in Figure 33.
320
280
240
200
160
120
80
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
INPUT VOLTAGE (V)
Figure 35. Transfer Function When Using a 2.5 V Reference Input
MOTOR CONTROL CURRENT SENSING
The AD8218 is a practical, accurate solution for high-side
current sensing in motor control applications. In cases where
the shunt resistor is referenced to a battery and the current
flowing is bidirectional (as shown in Figure 36), the AD8218
monitors the current with no additional supply pin necessary.
BATTERY
40
0
0
1
2
3
4
5
6
7
8
9
10
INPUT VOLTAGE (mV)
Figure 33. Output Transfer Function with ENB Connected to GND
BIDIRECTIONAL HIGH-SIDE CURRENT SENSING
I
MOTOR
Inputting a voltage at Pin 7 (REF) offsets the output of the AD8218
and allows for bidirectional current sensing. The transfer function
from the REF pin to the output is 1 V/V. For example, a 2.5 V REF
input offsets the output of the AD8218 to 2.5 V. See Figure 34
for typical connections. The user must ensure that the voltage
applied at Pin 7 (REF) is from a low impedance source.
MOTOR
–IN
+IN
V
S
REF
V
REF
AD8218
OUT
ENB
GND
Figure 36. High-Side Current Sensing in Motor Control
Rev. B | Page 12 of 16
Data Sheet
AD8218
OUTLINE DIMENSIONS
1.75
1.65
1.50
2.00 BSC
5
8
3.00 BSC
1.90
1.80
1.65
EXPOSED
PAD
0.20 MIN
4
1
PIN 1
INDICATOR
INDEX
AREA
0.50
0.40
0.30
TOP VIEW
SIDE VIEW
BOTTOM VIEW
0.80
0.75
0.70
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
0.15 REF
COPLANARITY
0.08
0.05 MAX
0.02 NOM
SECTION OF THIS DATA SHEET.
SEATING
PLANE
0.30
0.25
0.20
0.50
Figure 37. 8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
2 mm × 3 mm Body, Very Very Thin, Dual Lead
(CP-8-4)
Dimensions shown in millimeters
3.20
3.00
2.80
8
1
5
4
5.15
4.90
4.65
3.20
3.00
2.80
PIN 1
IDENTIFIER
0.65 BSC
0.95
0.85
0.75
15° MAX
1.10 MAX
0.80
0.55
0.40
0.15
0.05
0.23
0.09
6°
0°
0.40
0.25
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-187-AA
Figure 38. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
ORDERING GUIDE
Model1
Temperature Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Package Description
Package Option
CP-8-4
CP-8-4
RM-8
RM-8
Branding
Y5A
Y5A
Y3K
Y3K
AD8218BCPZ-RL
AD8218BCPZ-WP
AD8218BRMZ
AD8218BRMZ-RL
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Mini Small Outline Package [MSOP]
8-Lead Mini Small Outline Package [MSOP]
1 Z = RoHS Compliant Part.
Rev. B | Page 13 of 16
AD8218
NOTES
Data Sheet
Rev. B | Page 14 of 16
Data Sheet
NOTES
AD8218
Rev. B | Page 15 of 16
AD8218
NOTES
Data Sheet
©2011–2013 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D09592-0-4/13(B)
Rev. B | Page 16 of 16
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SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9137
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SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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