V62/06606-01XE [TI]
CURRENT-MODE PWM CONTROLLER; 电流模式PWM控制器
| 型号： | V62/06606-01XE |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | CURRENT-MODE PWM CONTROLLER |
| 文件： | 总15页 (文件大小：338K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
FEATURES
•
Controlled Baseline
•
•
•
Soft-Start Capability
Shutdown Terminal
500-kHz Operation
– One Assembly/Test Site, One Fabrication
Site
•
•
Extended Temperature Performance of –55°C
to 125°C
DW PACKAGE
(TOP VIEW)
Enhanced Diminishing Manufacturing
Sources (DMS) Support
C/S SS
VREF
C/S–
Shutdown
•
•
•
•
Enhanced Product-Change Notification
V
IN
(1)
Qualification Pedigree
B Out
Automatic Feed-Forward Compensation
V
C
C/S+
Programmable Pulse-by-Pulse Current
Limiting
GND
A Out
Sync
E/A+
E/A–
•
Automatic Symmetry Correction in Push-Pull
Configuration
COMP
•
•
Enhanced Load-Response Characteristics
Parallel Operation Capability for Modular
Power Systems
C
T
R
T
•
Differential Current-Sense Amplifier With
Wide Common-Mode Range
•
•
•
•
Double Pulse Suppression
500-mA (Peak) Totem-Pole Outputs
±1% Bandgap Reference
Undervoltage Lockout
(1) Component qualification in accordance with JEDEC and
industry standards to ensure reliable operation over an
extended temperature range. This includes, but is not limited
to, Highly Accelerated Stress Test (HAST) or biased 85/85,
temperature cycle, autoclave or unbiased HAST,
electromigration, bond intermetallic life, and mold compound
life. Such qualification testing should not be viewed as
justifying use of this component beyond specified
performance and environmental limits.
DESCRIPTION/ORDERING INFORMATION
The UC1846-EP control IC provides all of the necessary features to implement fixed-frequency, current-mode
control schemes, while maintaining a minimum external parts count. The superior performance of this technique
can be measured in improved line regulation, enhanced load-response characteristics, and a simpler,
easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current-limiting capability,
automatic symmetry correction for push-pull converters, and the ability to parallel power modules, while
maintaining equal current sharing.
Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start
capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic
restart or latch the supply off.
Other features include fully latched operation, double pulse suppression, deadline adjust capability, and a ±1%
trimmed bandgap reference.
The UC1846-EP features low outputs in the OFF state.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE PART NUMBER
TOP-SIDE MARKING
–55°C to 125°C
SOIC – DW
UC1846MDWREP
UC1846MEP
BLOCK DIAGRAM
5.1-V
Reference
Regulator
15
2
V
VREF
IN
13
V
C
Sync 10
UVLO
Lockout
F/F
R
C
9
8
T
T
Q
11 A Out
T
OSC
Q
Output
Stage
C/S−
C/S+
3
4
COMP
0.5 V
X3
S
S
R
Q
14 B Out
12 GND
+
0.5 mA
NI
5
6
E/A
INV
Current-
1
Limit Adjust
16 Shutdown
COMP
7
350 mV
6k
UDG−02057
2
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UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
Absolute Maximum Ratings(1)(2)
MIN MAX UNIT
Supply voltage (pin 15)
40
40
V
V
Collector supply voltage (pin 13)
Output current, source or sink (pins 11, 14)
Analog inputs (pins 3, 4, 5, 6, 16)
Reference output current (pin 2)
Sync output current (pin 10)
500 mA
VIN
–0.3
V
–30 mA
–5 mA
–5 mA
50 mA
Error amplifier output current (pin 7)
Soft-start sink current (pin 1)
Oscillator charging current (pin 9)
5
1000
2000
mA
TA = 25°C
TC = 25°C
Power dissipation
mW
Storage temperature range
–65 150 °C
300 °C
Lead temperature (soldering, 10 s)
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to ground, pin 13. Currents are positive into, negative out of the specified terminal.
3
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UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
Electrical Characteristics
TA = –55°C to 125°C, VIN = 15 V, RT = 10 k, CT = 4.7 nF, TA = TJ (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Reference
Output voltage
Line regulation
Load regulation
TJ = 25°C, IO = 1 mA
5.05
5.1
5
5.15
20
V
mV
mV
mV/°C
V
VIN = 8 V to 40 V
IL = 1 mA to 10 mA
3
15
Temperature stability
Total output variation
Output noise voltage
Long-term stability
Short-circuit output current
Oscillator
Over operating range(1)
Line, load, and temperature(1)
10 Hz ≤ f ≤ 10 kHz, TJ = 25°C(1)
TJ = 125°C, 1000 h
0.4
5
5.2
100
5
µV
mV
mA
VREF = 0 V
–10
39
–45
Initial accuracy
TJ = 25°C
43
–1
47
2
kHz
%
%
V
Voltage stability
VIN = 8 V to 40 V
Over operating range(1)
Temperature stability
Sync output high level
Sync output low level
Sync input high level
Sync input low level
Sync input current
Error Amplifier
–1
3.9
3.9
4.35
2.3
2.5
V
Pin 8 = 0 V
V
Pin 8 = 0 V
2.5
1.5
V
Sync voltage = 3.9 V, Pin 8 = 0 V
1.3
mA
Input offset voltage
Input bias current
Input offset current
Common-mode range
Open-loop voltage gain
Unity gain bandwidth
CMRR
0.5
–0.6
40
5
–1
mV
µA
nA
V
250
VIN = 8 V to 40 V
0
80
VIN – 2
∆VO = 1.2 V to 3 V, VCM = 2 V
TJ = 25°C(1)
105
1
dB
MHz
dB
dB
mA
mA
V
0.7
75
VCM = 0 V to 38 V, VIN = 40 V
VIN = 8 V to 40 V
100
105
6
PSRR
80
Output sink current
Output source current
High-level output voltage
Low-level output voltage
VID = –15 mV to –5 V, VPIN7 = 1.2 V
VID = 15 mV to 5 V, VPIN7 = 2.5 V
RL = 15 kΩ (pin 7)
2
–0.4
4.3
–0.5
4.6
0.7
RL = 15 kΩ (pin 7)
1
V
(1) These parameters, although specified over the recommended operating conditions, are not 100% tested in production.
4
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UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
Electrical Characteristics (continued)
TA = –55°C to 125°C, VIN = 15 V, RT = 10 k, CT = 4.7 nF, TA = TJ (unless otherwise noted)
PARAMETER
Current-Sense Amplifier
TEST CONDITIONS
MIN
TYP
MAX UNIT
Amplifier gain
VPIN3 = 0 V, Pin 1 open(2)(3)
2.5
1.1
2.75
1.2
3
V
V
Maximum differential input signal
(VPIN4 – VPIN3
Pin 1 open,(2) RL (pin 7) = 15 kW
)
Input offset voltage
CMRR
VPIN1 = 0.5 V, Pin 7 open(2)
VCM = 1 V to 12 V
5
83
25
mV
dB
dB
µA
µA
V
60
60
PSRR
VIN = 8 V to 40 V
84
Input bias current
Input offset current
Input common-mode range
Delay to outputs
VPIN1 = 0.5 V, Pin 7 open(2)
VPIN1 = 0.5 V, Pin 7 open(2)
–2.5
0.08
–10
1
0
VIN – 3
500
TJ = 25°C(4)
200
ns
Current-Limit Adjust
Current-limit offset
Input bias current
Shutdown Terminal
Threshold voltage
Input voltage range
Minimum latching current (IPIN1
VPIN3 = 0 V, VPIN4 = 0 V, Pin 7 open(2)
VPIN5 = VREF, VPIN6 = 0 V
0.45
0.5
0.55
–30
V
–10
µA
250
0
350
400
VIN
mV
V
(5)
)
3
1.5
1.5
mA
mA
ns
(6)
Maximum nonlatching current (IPIN1
)
0.8
Delay to outputs
TJ = 25°C(4)
300
600
Output
Collector-emitter voltage
Collector leakage current
40
V
VC = 40 V
200
0.4
2.1
µA
ISINK = 20 mA
0.1
0.4
Output low level
Output high level
V
V
ISINK = 100 mA
ISOURCE = 20 mA
ISOURCE = 100 mA
CL = 1 nF, TJ = 25°C(4)
CL = 1 nF, TJ = 25°C(4)
13
12
13.5
13.5
50
Rise time
300
300
ns
ns
Fall time
50
Undervoltage Lockout
Start-up threshold
Threshold hysteresis
Total Standby Current
Supply current
7.7
8
V
V
0.75
17
21
mA
(2) Parameter measured at trip point of latch with VPIN5 = VREF, VPIN6 = 0 V.
(3) Amplifier gain defined as:
ǒDVPIN7Ǔ
G +
ǒ
Ǔ
DVPIN4
where VPIN4 = 0 to 1 V
(4) These parameters, although specified over the recommended operating conditions, are not 100% tested in production.
(5) Current into pin 1 is ensured to latch circuit in shutdown state.
(6) Current into pin 1 is ensured not to latch circuit in shutdown state.
5
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UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
110
115
120
125
130
135
Continuous TA – °C
Figure 1. UC1846MDWREP Estimated Device Life at Elevated Temperatures
Wirebond Voiding Fail Modes
6
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UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
APPLICATION INFORMATION
7.5 mA
Output deadtime is determined by the external capacitor, CT, according to the formula:
ID
3.6
ID * RT
(
kW
)
τd (µs) = 145CT (µf)
ID = Oscillator discharge current at 25°C is typically 7.5 mA.
For large values of RT: τd (µs) ≈ 145CT (µf)
2.2
RT (kW) CT (mf)
Oscillator frequency is approximated by the formula: fT (kHz) ≈
Figure 2. Oscillator Circuit
V
REF
V
REF
5
6
0.5 mA
Z
S
7
Comp
Z
F
I < 0.5 mA
F
Error amplifier can source up to 0.5 mA.
Figure 3. Error-Amplifier Output Configuration
V
IN
= 20 V
T = 255C
A
Frequency (Hz)
Figure 4. Error-Amplifier Gain and Phase vs Frequency
7
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UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
APPLICATION INFORMATION (continued)
V
IN
= 20 V
T
A
= 255C
R
L
– Output Load Resistance (kW)
Figure 5. Error-Amplifier Open-Logic DC Gain vs Load Resistance
Figure 6. Parallel Operation
8
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UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
APPLICATION INFORMATION (continued)
0.5 mA
0.5 V
R2 V
R1 + R2
3RS
REF
−0.5
Peak current (IS) is determined by the formula: I
=
S
Figure 7. Pulse-by-Pulse Current Limiting
9
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UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
APPLICATION INFORMATION (continued)
3 mA (latched off)
3 mA, the device
Figure 8. Soft-Start and Shutdown/Restart Functions
A small RC filter may be required in some applications to reduce switch transients.
Differential input allows remote noise-free sensing.
Figure 9. Current-Sense Amplifier Connection
10
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UC1846-EP
CURRENT-MODE PWM CONTROLLER
www.ti.com
SGLS329–MAY 2006
APPLICATION INFORMATION (continued)
Frequency Set and
Max Duty Cycle R
V
(5-V Output)
(12 V)
REF
T
V
IN
Timing
Cap C
T
5 V
5 V
1 nF
0.1 mF
4.7 nF
UC1846-EP
I
SENSE
Adjust
(91 V PK)
(12 V)
0.1 mF
5 V
Duty-Cycle
Adjust
150 W
5 V
150 W
Current-Limit
Adjust
–Bypass capacitance should be low ESR and ESL type.
–Short pins 6 and 7 for unity gain testing.
Figure 10. Open-Loop Test Circuit
11
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PACKAGE OPTION ADDENDUM
www.ti.com
9-May-2012
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)
UC1846MDWREP
V62/06606-01XE
ACTIVE
ACTIVE
SOIC
SOIC
DW
DW
16
16
2000
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
Add to cart
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
Add to cart
(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.
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 UC1846-EP :
Catalog: UC1846
•
Space: UC1846-SP
•
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
9-May-2012
NOTE: Qualified Version Definitions:
Catalog - TI's standard catalog product
•
•
Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application
Addendum-Page 2
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