LM5020 - 100V Current Mode PWM Controller

LM5020 - 100V Current Mode PWM Controller from the PowerWise® Family

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Reliability	Design Tools	Reference Designs	Models	Application Notes	Knowledge Base

Features

•	Internal Start-up Bias Regulator
•	Error Amplifier
•	Precision Voltage Reference
•	Programmable Softstart
•	1A Peak Gate Driver
•	Maximum Duty Cycle Limiting (80% for LM5020-1 or 50% for LM5020-2)
•	Programmable Line Under Voltage Lockout (UVLO) with Adjustable Hysteresis
•	Cycle-by-Cycle Over-Current Protection
•	Slope Compensation (LM5020-1)
•	Programmable Oscillator Frequency with Synchronization Capability
•	Current Sense Leading Edge Blanking
•	Thermal Shutdown Protection

General Description

The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to implement single ended primary power converter topologies. More...

Applications

•	Telecommunication Power Converters
•	Industrial Power Converters
•	+42V Automotive Systems

Parameters Values

Input Min Voltage 13 Volt

Input Max Voltage 100 Volt

Adjustable Output Yes

Feedback Voltage 1.25 Volt

Output Power 300 Watt

Efficiency (peak) 85 %

Frequency Min 50 kHz

Frequency Max 1000 kHz

Adj Switch Frequency Yes

Sync Pin Yes

On/Off Pin Yes

SoftStart Yes

Error Flag No

Special Features 80% and 50% duty cycle limit (-2 and -1 versions), Programmable UVLO, error amplifier for non-isolated designs, leading-edge blanking, high current gate drive

Topology Flyback, Inverting, Buck, Boost, Forward

Step-Down Yes

Step-Up Yes

Inverting Yes

Flyback Yes

RegType Switching Controller

Multiple Output Capability Yes

Temperature Min -40 deg C

Temperature Max 125 deg C

PowerWise Yes

Typical Performance

*click for larger image

VCC Voltage vs Current

Also Recommended

LM5021▲	No Internal Start-Up Regualtor
LM5030	100V PWM Controller For Push-Pull And Bridge Topologies
LM5104	100V Dual High-Side / Low-Side Mosfet Driver
LM5110	Dual High Current (5A) Low-Side Mosfet Driver

Additional Resources

Online Seminars

High Voltage Switching Power Supply Topologies and Power Management I.C.s

Application Notes

Block Diagram

*click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM5020 100V Current Mode PWM Controller	623 Kbytes	14-Apr-06	Download

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Qty

Qty

$US each

LM5020EVAL

100V Current Mode PWM Controller Flyback Evaluation Board

Full production

Buy Now

1+

$60.00

1

8 weeks

N/A

LM5020MM-1

10

NOPB
STD

1
1

260
260

Full production

Samples

Buy Now

1K+

$0.99

reel
of
1000

6 weeks

2000

LM5020MM-2

10

NOPB
STD

1
1

260
260

Full production

Samples

Buy Now

1K+

$0.99

reel
of
1000

6 weeks

2000

LM5020MMX-1

10

NOPB
STD

1
1

260
260

Full production

Buy Now

1K+

$0.99

reel
of
3500

6 weeks

7500

LM5020MMX-2

10

NOPB

1

260

Full production

Buy Now

1K+

$0.99

reel
of
3500

6 weeks

5000

LM5020SD-1

10

NOPB

1

260

Full production

Samples

Buy Now

1K+

$0.99

reel
of
1000

NS
UZXYTT
5020-1

6 weeks

7500

LM5020SD-2

10

NOPB

1

260

Full production

Samples

Buy Now

1K+

$0.99

reel
of
1000

NS
UZXYTT
5020-2

6 weeks

10

LM5020SDX-1

10

NOPB

1

260

Full production

Buy Now

1K+

$0.99

reel
of
4500

NS
UZXYTT
5020-1

6 weeks

N/A

LM5020SDX-2

10

NOPB

1

260

Full production

Buy Now

1K+

$0.99

reel
of
4500

NS
UZXYTT
5020-2

6 weeks

N/A

General Description

The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to implement single ended primary power converter topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing inherent line feed-forward. The LM5020 includes a high-voltage start-up regulator that operates over a wide input range up to 100V. The PWM controller is designed for high speed capability including an oscillator frequency range to 1MHz and total propagation delays less than 100ns. Additional features include an error amplifier, precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope compensation, softstart, oscillator synchronization capability and thermal shutdown. The controller is available in both MSOP-10 and LLP-10 packages.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM5020MM-1	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5020MM-2	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5020MMX-1	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5020MMX-2	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5020SD-1	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5020SD-2	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5020SDX-1	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5020SDX-2	ABCD150XV1	0	3868	0	0	2595000	2	736338335

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

Design Tools

Title	Size in Kbytes	Date
LM5020 PSPICE model	578 Kbytes	17-Apr-2009	View	Download
Power Reference Design Library			View

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Reference Designs

•	LM5020 Reference Design - Flyback Triple Output Converter: 10.8-13.2V Input, 100V @ 35 mA; 36V @ 40 mA; 52V @ 45 mA Outputs
•	LM5020 Reference Design - Boost Converter, High Output Current: 6-20V Input, 20V @ 5A Output
•	LM5020 Reference Design - Boost Converter with 39W Output: 12V Input, 26V @ 1.5A Output
•	LM5020 Reference Design - Buck-Boost Converter, 20W, Negative Voltage to Positive Voltage Output: -48V Input, 13.5V @ 1.5A Output
•	LM5020 Reference Design - 1 Lumileds LUXEON High Brightness LED, 900 mA with Dimming Control Output
•	LM5020 Reference Design - Sepic Converter, Wide Input Range: 11.4-28V Input, 18V @ 0.2A Output
•	RD-136 - LM5020 Reference Design - Dual Output Flyback Converter with isolated outputs of 5V@0.2A and 12V@2.1A. Two LM2736Y's provide an additional output of 3.3V@0.5A and 5V@0.5A

Application Notes

Title	Size in Kbytes	Date
AN-1314: Application Note 1314 LM5020 Evaluation Board	612 Kbytes	10-Feb-05	Download
AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge	230 Kbytes	2-Jul-08	Download
AN-1574: Application Note 1574 LM5073 Evaluation Board	464 Kbytes	24-Apr-07	Download

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More Application Notes

Title	Size in Kbytes	Date
AN-1976: Application Note 1976 LM5027 Evaluation Board	588 Kbytes	19-Aug-09	Download
AN-1387: Application Note 1387 LM5026 Evaluation Board	721 Kbytes	7-Sep-05	Download
AN-1387 (Chinese): Application Note 1387 LM5026 Evaluation Board	535 Kbytes
AN-1696: Application Note 1696 Designing a Boost LED Driver Using the LM5022	286 Kbytes	22-Feb-08	Download
AN-1696 (Chinese): Application Note 1696 Designing a Boost LED Driver Using the LM5022	410 Kbytes
AN-1605: Application Note 1605 LM5022 Boost LED Driver Evaluation Board	769 Kbytes	2-Oct-07	Download
AN-1557: Application Note 1557 LM5022 Evaluation Board	513 Kbytes	22-May-08	Download
AN-1557 (Chinese): Application Note 1557 LM5022 Evaluation Board	497 Kbytes

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[Information as of 7-Nov-2009]