Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - voltage regulators - DC DC switch controllers WSON 10

OUT

COMP

UVLO

VIN

VCC

COMPENSATION

GND

OUT

LM5020

RT SYNC

LM5020

www.ti.com

SNVS275F –MAY 2004–REVISED APRIL 2006

LM5020 100V Current Mode PWM Controller

Check for Samples: LM5020

FEATURES

PACKAGES

• Internal Start-up Bias Regulator

• VSSOP-10

• Error Amplifier • WSON-10 (4 mm x 4 mm)

• Precision Voltage Reference

DESCRIPTION

• Programmable Softstart

The LM5020 high voltage pulse-width-modulation

• 1A Peak Gate Driver

(PWM) controller contains all of the features needed

• Maximum Duty Cycle Limiting (80% for

to implement single ended primary power converter

LM5020-1 or 50% for LM5020-2)

topologies. Output voltage regulation is based on

current-mode control, which eases the design of loop

• Programmable Line Under Voltage Lockout

compensation while providing inherent line feed-

(UVLO) with Adjustable Hysteresis

forward. The LM5020 includes a high-voltage start-up

• Cycle-by-Cycle Over-Current Protection

regulator that operates over a wide input range up to

• Slope Compensation (LM5020-1)

100V. The PWM controller is designed for high speed

capability including an oscillator frequency range to

• Programmable Oscillator Frequency with

1MHz and total propagation delays less than 100ns.

Synchronization Capability

Additional features include an error amplifier,

• Current Sense Leading Edge Blanking

precision reference, line under-voltage lockout, cycle-

• Thermal Shutdown Protection

by-cycle current limit, slope compensation, softstart,

oscillator synchronization capability and thermal

shutdown. The controller is available in both VSSOP-

APPLICATIONS

10 and WSON-10 packages.

• Telecommunication Power Converters

• Industrial Power Converters

• +42V Automotive Systems

Typical Application Circuit

Figure 1. Non-Isolated Flyback Converter

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.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (17 pages)

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LM5020 www.ti.
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LM5020 SNVS275F – MAY 2004 – REVISED APRIL 2006 www.ti.com Connection Diagram Top View 1 10 2 9 3 8 4 7 5 6 VIN FB SS RT/SYNC CS COMP UVLO VCC OUT GND Figure 2. 10-Lead VSSOP, WSON PIN DESCRIPTIONS Pin Name Description 1 VIN Source Input Voltage Input to the start-up regulator. Input range is 13V to 100V. Application Information 2 FB Feedback Signal Inverting input of the internal error amplifier. The noninverting input is internally connected to a 1.25V reference.
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LM5020 www.ti.com SNVS275F – MAY 2004 – REVISED APRIL 2006 Absolute Maximum Ratings (1) (2) VIN to GND -0.3V to 100V VCC to GND -0.3V to 16V RT to GND -0.3V to 5.5V All other pins to GND -0.3V to 7V Power Dissipation Internally Limited ESD Rating (3) Human Body Model 2kV Storage Temperature -65°C to +150°C Junction Temperature 150°C (1) Absolute Maximum Ratings are limits beyond which damage to the device may occur.
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LM5020 SNVS275F – MAY 2004 – REVISED APRIL 2006 www.ti.com Electrical Characteristics (continued) Specifications in standard type face are for TJ= +25°C and those in boldface type apply over the full operating junction temperature range. Unless otherwise specified: VIN = 48V, VCC = 10V, and RT = 31.6kΩ.(1) Symbol Parameter Conditions Min CS Sink Impedance (clocked) Typ Max Units 35 55 Ω Soft Start Softstart Current Source 7 10 13 µA Softstart to COMP Offset 0.35 0.55 0.
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LM5020 www.ti.com SNVS275F – MAY 2004 – REVISED APRIL 2006 Typical Performance Characteristics Unless otherwise specified: TJ = 25°C. VCC and VIN vs VIN 20 VCC vs ICC (VIN = 48V) 9 18 8 16 7 6 12 VCC (V) VCC (V) 14 10 8 5 4 6 3 4 2 2 0 1 0 20 10 0 5 10 VIN (V) 15 20 25 ICC (mA) Figure 3. Figure 4. Oscillator Frequency vs RT Oscillator Frequency vs Temperature RT = 31.6kΩ 210 1.00E+06 FREQUENCY (kHz) 1.00E+05 200 195 190 1.
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LM5020 SNVS275F – MAY 2004 – REVISED APRIL 2006 www.ti.com Block Diagram 7.7V SERIES REGULATOR VCC VIN REFERENCE ENABLE 5V 1.25V UVLO + - LOGIC 1.25V UVLO HYSTERESIS (20 PA) RT/SYNC CLK OSC VCC DRIVER SLOPECOMP RAMP GENERATOR (LM5020-1 Only) OUT 50 PA Max Duty Limit LM5020-1 (80%) LM5020-2 (50%) 0 S Q R Q 5V COMP 5k 2R 1.25V FB GND PWM + - LOGIC 1.4V R SS SS CS 0.
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LM5020 www.ti.com SNVS275F – MAY 2004 – REVISED APRIL 2006 DETAILED OPERATING DESCRIPTION The LM5020 High Voltage PWM controller contains all of the features needed to implement single ended primary power converter topologies. The LM5020 includes a high-voltage startup regulator that operates over a wide input range 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.
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LM5020 SNVS275F – MAY 2004 – REVISED APRIL 2006 www.ti.com Current Limit/Current Sense The LM5020 provides a cycle-by-cycle over current protection function. Current limit is accomplished by an internal current sense comparator. If the voltage at the current sense comparator input exceeds 0.5V, the output is immediately terminated. A small RC filter, located near the controller, is recommended to filter noise from the current sense signal.
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LM5020 www.ti.com SNVS275F – MAY 2004 – REVISED APRIL 2006 Soft Start The softstart feature allows the power converter to gradually reach the initial steady state operating point, thereby reducing start-up stresses and current surges. At power on, after the VCC and the line undervoltage lockout thresholds are satisfied, an internal 10µA current source charges an external capacitor connected to the SS pin.
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LM5020 SNVS275F – MAY 2004 – REVISED APRIL 2006 www.ti.com Table 1. Bill Of Materials ITEM 10 PART NUMBER DESCRIPTION VALUE C 1 C4532X7R2A225M CAPACITOR, CER, TDK 2.2µF, 100V C 2 C4532X7R2A225M CAPACITOR, CER, TDK 2.2µF, 100V C 3 C2012X7R1H103K CAPACITOR, CER, TDK 0.01µF, 50V C 4 C3216X7R2A104K CAPACITOR, CER, TDK 0.1µF, 100V C 5 C2012X7R1H103K CAPACITOR, CER, TDK 0.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 14-Feb-2014 (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM5020MM-1 VSSOP DGS 10 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LM5020MM-1/NOPB VSSOP DGS 10 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LM5020MM-2/NOPB VSSOP DGS 10 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM5020MM-1 VSSOP DGS 10 1000 210.0 185.0 35.0 LM5020MM-1/NOPB VSSOP DGS 10 1000 210.0 185.0 35.0 LM5020MM-2/NOPB VSSOP DGS 10 1000 210.0 185.0 35.0 LM5020MMX-1/NOPB VSSOP DGS 10 3500 367.0 367.0 35.0 LM5020MMX-2/NOPB VSSOP DGS 10 3500 367.0 367.0 35.0 LM5020SD-1 WSON DPR 10 1000 210.0 185.
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MECHANICAL DATA DPR0010A SDC10A (Rev A) www.ti.
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