LM5030 100-V Push-Pull Current Mode PWM Controller

1 Features

Internal High-Voltage Start-Up Regulator
Single Resistor Oscillator Setting
Synchronizable
Error Amplifier
Precision Reference
Adjustable Softstart
Dual Mode Overcurrent Protection
Slope Compensation
Direct Optocoupler Interface
1.5-A Peak Gate Drivers
Thermal Shutdown

2 Applications

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

3 Description

The LM5030 high-voltage PWM controller contains all of the features needed to implement push-pull and bridge topologies, using current-mode control in a small 10-pin package. This device provides two alternating gate driver outputs. The LM5030 includes a high-voltage start-up regulator that operates over a wide input range of 14 V to 100 V. Additional features include: error amplifier, precision reference, dual mode current limit, slope compensation, softstart, sync capability, and thermal shutdown. This high speed IC has total propagation delays less than
100 ns and a 1-MHz capable single-resistor adjustable oscillator.

Device Information⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM5030	VSSOP (10)	3.00 mm × 3.00 mm
LM5030	WSON (10)	4.00 mm × 4.00 mm

For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Diagram

4 Revision History

Changes from C Revision (March 2013) to D Revision

Added ESD Ratings table, Thermal Information table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo

Changes from B Revision (March 2013) to C Revision

Changed layout of National Data Sheet to TI formatGo

5 Pin Configuration and Functions

DGS, DPR Package

10-Pin VSSOP, WSON

Top View

Pin Functions

PIN		I/O	DESCRIPTION	APPLICATION INFORMATION
NAME	NO.	I/O	DESCRIPTION	APPLICATION INFORMATION
COMP	3	O	Output to the error amplifier	There is an internal 5-kΩ pullup resistor on this pin. The error amplifier provides an active sink.
CS	8	I	Current sense input	Current sense input for current mode control and current limit sensing. Using separate dedicated comparators, if CS exceeds 0.5 V, the outputs will go into cycle-by-cycle current limit. If CS exceeds 0.625 V the outputs will be disabled and a softstart commenced.
GND	7	—	Return	Ground
OUT1	5	O	Output of the PWM controller	Alternating PWM output gate driver
OUT2	6	O	Output of the PWM controller	Alternating PWM output gate driver
RT	9	I	Oscillator timing resistor pin and synchronization input	An external resistor sets the oscillator frequency. This pin will also accept synchronization pulses from an external oscillator.
SS	10	I	Dual purpose soft start and shutdown pin	A 10-µA current source and an external capacitor set the softstart timing length. The controller will enter a low power state if the SS pin is pulled below the typical shutdown threshold of 0.45 V.
V_IN	1	I	Source input voltage	Input to start-up regulator. Input range 14 to 100 V.
V_FB	2	I	Inverting input to the error amplifier	The non-inverting input is internally connected to a 1.25-V reference.
V_CC	4	I/O	Output from the internal high-voltage series pass regulator. The regulation setpoint is 7.7 V.	If an auxiliary winding raises the voltage on this pin above the regulation setpoint, the internal series pass regulator will shutdown, reducing the IC power dissipation.
WSON DAP	SUB	—	Die substrate	The exposed die attach pad on the WSON package should be connected to a PCB thermal pad at ground potential. For additional information on using TI's No Pull Back WSON package, refer to WSON Application Note AN-1187 (SNOA401).