5962-8944101CA [TI]
Isolated Feedback Generator; 隔离反馈发生器
| 型号： | 5962-8944101CA |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Isolated Feedback Generator |
| 文件： | 总12页 (文件大小：599K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UC1901
UC2901
UC3901
Isolated Feedback Generator
FEATURES
DESCRIPTION
• An Amplitude-Modulation System for
Transformer Coupling an Isolated
Feedback Error Signal
The UC1901 family is designed to solve many of the problems associ-
ated with closing a feedback control loop across a voltage isolation
boundary. As a stable and reliable alternative to an optical coupler, these
devices feature an amplitude modulation system which allows a loop er-
ror signal to be coupled with a small RF transformer or capacitor.
• Low-Cost Alternative to Optical
Couplers
The programmable, high-frequency oscillator within the UC1901 series
permits the use of smaller, less expensive transformers which can readily
be built to meet the isolation requirements of today's line-operated power
systems. As an alternative to RF operation, the external clock input to
these devices allows synchronization to a system clock or to the switch-
ing frequency of a SMPS.
• Internal 1% Reference and Error
Amplifier
• Internal Carrier Oscillator Usable to
5MHz
• Modulator Synchronizable to an
External Clock
An additional feature is a status monitoring circuit which provides an active-
±
low output when the sensed error voltage is within 10% of the reference.
• Loop Status Monitor
The DRIVERA output, DRIVERB output, and STATUS output are disabled
until the input supply has reached a sufficient level to allow proper operation
of the device.
Since these devices can also be used as a DC driver for optical couplers,
the benefits of 4.5 to 40V supply operation, a 1% accurate reference, and a
high gain general purpose amplifier offer advantages even though an AC
system may not be desired.
UC1901 SIMPLIFIED SCHEMATICNovember S
µ
µ
µ
UDG-98080
SLUS279A - November 1998 - Revised January 2010
UC1901
UC2901
UC3901
CONNECTION DIAGRAMS
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Reference Output Current . . . . . . . . . . . . . . . . . . . . . . . –10mA
Driver Output Currents . . . . . . . . . . . . . . . . . . . . . . . . . . –35mA
Status Indicator Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Status Indicator Current . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA
Ext. Clock Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Error Amplifier Inputs . . . . . . . . . . . . . . . . . . . . . –0.5V to +35V
Power Dissipation at TA = 25°C. . . . . . . . . . . . . . . . . . 1000mW
Power Dissipation at TC = 25°C . . . . . . . . . . . . . . . . . 2000mW
Operating Junction Temperature . . . . . . . . . . –55°C to +150°C
Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 seconds) . . . . . . . . . . 300°C
DIL-14, SOIC-14 (TOP VIEW)
J or N Package, D Package
Note 1: Voltages are referenced to ground, Pin 7. Currents are
positive into, negative out of the specified terminal.
Note 2: Consult Packaging section of Databook for thermal limi-
tations and considerations of package.
PLCC-20, LCC-20 (TOP VIEW)
Q, L Packages
SOIC-16 Wide (TOP VIEW)
DW Package
TEMPERATURE AND PACKAGE SELECTION
GUIDE
TEMPERATURE
RANGE
AVAILABLE
PACKAGES
UC1901
UC2901
UC3901
–55°C to +125°C
–40°C to +85°C
0°C to +70°C
J, L
D, DW, J, N, Q
D, DW, J, N, Q
2
UC1901
UC2901
UC3901
ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for VIN = 10V, RT = 10kΩ, CT =
820pF, TA = TJ.
PARAMETER
TEST CONDITIONS
UC1901/UC2901
MIN TYP MAX
UC3901
TYP
UNITS
MIN
MAX
Reference Section
Output Voltage
TJ = 25°C
MIN ≤ TJ ≤ TMAX
1.485
1.470
1.5 1.515 1.47
1.5 1.530 1.455
1.5
1.5
2
1.53
1.545
15
V
T
Line Regulation
VIN = 4.5 to 35V
IOUT = 0 to 5mA
TJ = 25°C
2
4
10
10
mV
mV
mV
Load Regulation
Short Circuit Current
4
15
–35
–55
–35
–55
Error Amplifier Section (To Compensation Terminal)
Input Offset Voltage
Input Bias Current
Input Offset Current
Small Signal Open Loop Gain
CMRR
VCM = 1.5V
VCM = 1.5V
VCM = 1.5V
1
4
–3
1
1
8
–6
2
mV
µA
–1
0.1
60
80
–1
0.1
60
µA
40
60
80
0.4
90
–2
40
60
dB
VCM = 0.5 to 7.5V
80
dB
PSRR
VIN = 5 to 25V
100
80
100
0.7
150
–3
dB
Output Swing, ∆ VO
Maximum Sink Current
Maximum Source Current
Gain Band Width Product
Slew Rate
0.7
150
–3
0.4
90
–2
V
µA
mA
MHz
V/µS
1
1
0.3
0.3
Modulators/Drivers Section (From Compensation Terminal)
Voltage Gain
11
12
13
10
12
±
2.8
14
dB
V
±
±
±
Output Swing
1.6
2.8
1.6
500
–15
Driver Sink Current
500
–15
700
–35
25
700
–35
25
µA
Driver Source Current
mA
MHz
Gain Band Width Product
Oscillator Section
Initial Accuracy
TJ = 25°C
MIN ≤ TJ ≤ TMAX
140
130
150
160
170
.35
130
120
150
170
180
.60
kHz
kHz
%/V
MHz
V
T
Line Sensitivity
VIN = 5 to 35V
.15
5
.15
5
Maximum Frequency
Ext. Clock Low Threshold
Ext. Clock High Threshold
Status Indicator Section
Input Voltage Window
Saturation Voltage
RT = 10k, CT = 10pF
Pin 1 (CT) = VIN
Pin 1 (CT) = VIN
0.5
0.5
1.6
1.6
V
±
±
±
±
±
±
170
@ E/A Inputs, VCM = 1.5V
E/A ∆ Input = 0V, ISINK = 1.6mA
Pin 13 = 3V, E/A ∆ Input = 0.0V
Pin 13 = 40V, E/A ∆Input = 0.2V
VIN = 35V
135
8
150
165
130
8
150
mV
V
0.45
0.45
Max. Output Current
Leakage Current
15
.05
5
15
.05
5
mA
µA
mA
1
8
5
Supply Current
10
UVLO Section
Drivers Enabled Threshold
At Input Supply VIN
At Input Supply VIN
3.9
3.9
4.5
4.5
3.9
3.9
4.5
4.5
V
V
Status Output Enabled
Threshold
Change in Reference Output
When VIN Reaches UVLO
Threshold
–2
–30
–2
–30
mV
3
UC1901
UC2901
UC3901
µ
µ
Note: Transformer Data: N1 = N2 = 20TAWG 26
Core = Ferroxcube 3E2A Ferrite, 0.5" O.D. toroid
Carrier Frequency = 1MHz
Figure 1. Transformer Coupled Open Loop Transfer Function
Figure 2. Oscillator Frequency
APPLICATION INFORMATION
Figure 3. Typical Driver Output Swing vs
Temperature
The error amplifier compensation terminal, Pin 12, is in- With the internal oscillator the squarewave will have a
tended as a source of feedback to the amplifier's invert- fixed 50% duty cycle. If the internal oscillator is disabled
ing input at Pin 11. For most applications, a series DC by connecting Pin 1, C , to V then the frequency and
R
IN
blocking capacitor should be part of the feedback net- duty cycle of the output will be determined by the input
work. The amplifier is internally compensated for unity clock waveform at Pin 2. If the oscillator remains disabled
feedback.
and there is not clock input at Pin 2, there will be a linear
12dB of signal gain to one or the other of the driver out-
puts depending on the DC state of Pin 2.
The waveform at the driver outputs is a squarewave with
an amplitude that is proportional to the error amplifier in-
put signal. There is a fixed 12dB of gain from the error The driver outputs are emitter followers which will source
amplifier compensation pin to the modulator driver out- a minimum of 15mA of current. The sink current, inter-
puts. The frequency of the output waveform is controlled
by either the internal oscillator or an external clock signal.
nally limited at 700µA, can be increased by adding resis-
tors to ground at the driver outputs.
4
UC1901
UC2901
UC3901
APPLICATION INFORMATION (continued)
Figure 4. R.F. Transformer Coupled Feedback
Figure 5. Feedback Coupled at Switching Frequency
5
UC1901
UC2901
UC3901
6
PACKAGE OPTION ADDENDUM
www.ti.com
5-Dec-2011
PACKAGING INFORMATION
Status (1)
Eco Plan (2)
MSL Peak Temp (3)
Samples
Orderable Device
Package Type Package
Drawing
Pins
Package Qty
Lead/
Ball Finish
(Requires Login)
5962-89441012A
5962-8944101CA
5962-8944101VCA
UC1901J
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
LCCC
CDIP
CDIP
CDIP
CDIP
LCCC
LCCC
SOIC
FK
J
20
14
14
14
14
20
20
14
1
1
TBD
TBD
TBD
TBD
TBD
TBD
TBD
Call TI
Call TI
A42
Call TI
Call TI
J
1
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
J
1
A42
UC1901J883B
UC1901L
J
1
A42
FK
FK
D
1
POST-PLATE N / A for Pkg Type
POST-PLATE N / A for Pkg Type
CU NIPDAU Level-2-260C-1 YEAR
UC1901L883B
UC2901D
1
50
Green (RoHS
& no Sb/Br)
UC2901DG4
UC2901DTR
ACTIVE
ACTIVE
SOIC
SOIC
D
D
14
14
50
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU Level-2-260C-1 YEAR
2500
Green (RoHS
& no Sb/Br)
UC2901DTR/80209
UC2901DTR/80209G4
UC2901DTRG4
OBSOLETE
OBSOLETE
ACTIVE
SOIC
SOIC
SOIC
D
D
D
14
14
14
TBD
TBD
Call TI
Call TI
Call TI
Call TI
2500
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UC2901J
UC2901N
ACTIVE
ACTIVE
CDIP
PDIP
J
14
14
1
TBD
A42 N / A for Pkg Type
N
25
Green (RoHS
& no Sb/Br)
CU NIPDAU N / A for Pkg Type
CU NIPDAU N / A for Pkg Type
UC2901NG4
UC2901Q
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
PDIP
PLCC
PLCC
SOIC
SOIC
SOIC
N
FN
FN
D
14
20
20
14
14
14
25
46
Green (RoHS
& no Sb/Br)
Green (RoHS
& no Sb/Br)
CU SN
CU SN
Level-2-260C-1 YEAR
Level-2-260C-1 YEAR
UC2901QG3
UC3901D
46
Green (RoHS
& no Sb/Br)
50
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU Level-2-260C-1 YEAR
UC3901DG4
UC3901DTR
D
50
Green (RoHS
& no Sb/Br)
D
2500
Green (RoHS
& no Sb/Br)
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
5-Dec-2011
Status (1)
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
Eco Plan (2)
MSL Peak Temp (3)
Samples
Orderable Device
Package Type Package
Drawing
Pins
Package Qty
Lead/
Ball Finish
(Requires Login)
UC3901DTRG4
UC3901DW
SOIC
SOIC
SOIC
SOIC
SOIC
PDIP
PDIP
PLCC
PLCC
PLCC
PLCC
D
14
16
16
16
16
14
14
20
20
20
20
2500
40
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
DW
DW
DW
DW
N
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU N / A for Pkg Type
CU NIPDAU N / A for Pkg Type
UC3901DWG4
UC3901DWTR
UC3901DWTRG4
UC3901N
40
Green (RoHS
& no Sb/Br)
2000
2000
25
Green (RoHS
& no Sb/Br)
Green (RoHS
& no Sb/Br)
Green (RoHS
& no Sb/Br)
UC3901NG4
UC3901Q
N
25
Green (RoHS
& no Sb/Br)
FN
FN
FN
FN
46
Green (RoHS
& no Sb/Br)
CU SN
CU SN
CU SN
CU SN
Level-2-260C-1 YEAR
Level-2-260C-1 YEAR
Level-2-260C-1 YEAR
Level-2-260C-1 YEAR
UC3901QG3
UC3901QTR
UC3901QTRG3
46
Green (RoHS
& no Sb/Br)
1000
1000
Green (RoHS
& no Sb/Br)
Green (RoHS
& no Sb/Br)
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Addendum-Page 2
PACKAGE OPTION ADDENDUM
www.ti.com
5-Dec-2011
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF UC1901, UC1901-SP, UC2901, UC3901 :
Catalog: UC3901, UC1901
•
Enhanced Product: UC2901-EP
•
Military: UC1901
•
Space: UC1901-SP, UC1901-SP
•
NOTE: Qualified Version Definitions:
Catalog - TI's standard catalog product
•
Enhanced Product - Supports Defense, Aerospace and Medical Applications
•
Military - QML certified for Military and Defense Applications
•
Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application
•
Addendum-Page 3
PACKAGE MATERIALS INFORMATION
www.ti.com
13-Jan-2010
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
UC2901DTR
UC3901DTR
UC3901DWTR
UC3901QTR
SOIC
SOIC
SOIC
PLCC
D
D
14
14
16
20
2500
2500
2000
1000
330.0
330.0
330.0
330.0
16.4
16.4
16.4
16.4
6.5
6.5
9.0
9.0
2.1
2.1
2.7
4.9
8.0
8.0
16.0
16.0
16.0
16.0
Q1
Q1
Q1
Q1
DW
FN
10.85 10.8
10.3 10.3
12.0
12.0
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
13-Jan-2010
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
UC2901DTR
UC3901DTR
UC3901DWTR
UC3901QTR
SOIC
SOIC
SOIC
PLCC
D
D
14
14
16
20
2500
2500
2000
1000
346.0
346.0
346.0
346.0
346.0
346.0
346.0
346.0
33.0
33.0
33.0
33.0
DW
FN
Pack Materials-Page 2
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