LM5033_14 Datasheet, PDF (1/23 Pages) Texas Instruments – 100V Push-Pull Voltage Mode PWM Controller

LM5033
www.ti.com
SNVS181A – MAY 2004 – REVISED MAY 2005
LM5033 100V Push-Pull Voltage Mode PWM Controller
Check for Samples: LM5033
FEATURES
1
•2 Internal High Voltage (100V) Start-Up
Regulator
• Single Resistor Oscillator Setting
• Synchronizable
• Precision Reference Output
• Adjustable Soft-Start
• Over-Current Protection
• Direct Optocoupler Interface
• 1.5A Peak Gate Drivers
• Thermal Shutdown
APPLICATIONS
• Intermediate DC/DC Bus Converter
• Telecommunication Power Converters
• Industrial Power Converters
• +42V Automotive Systems
PACKAGE
• VSSOP-10
• WSON-10
DESCRIPTION
The LM5033 High Voltage PWM controller contains
all the features needed to implement Push-Pull, Half-
Bridge, and Full-Bridge topologies. Applications
include closed loop voltage mode converters with a
highly regulated output voltage, or an open loop "DC
transformer" such as an Intermediate Bus Converter
(IBC) with an efficiency >95%. Two alternating gate
driver outputs with a guaranteed deadtime are
provided. The LM5033 includes a start-up regulator
that operates over a wide input range of 15V to 100V.
Additional features include: precision voltage
reference output, current limit detection, remote
shutdown, softstart, sync capability and thermal
shutdown. This high speed IC has total propagation
delays less than 100 ns and a 1MHz capable
oscillator.
Connection Diagram
1
V_IN
2
REF
3
COMP
4
V_CC
5
OUT1
10
SS
9
R_T/SYNC
8
CS
7
GND
6
OUT2
Figure 1. 10-Lead VSSOP, WSON
Package Number DGS0010A, DPR0010A
Pin Description
PIN
NAME
DESCRIPTION
APPLICATION INFORMATION
1
Vin
Input Voltage
Input to the start-up regulator. Input range is 15V to 90V,
with transient capability to 100V .
2
REF
2.5V precision reference output
Sink only, requires an external pull-up resistor. This can
be used as a reference for external circuitry.
3
COMP PWM Input
Feedback to the PWM comparator’s inverting input,
through a 3:1 divider. The output duty cycle increases as
this pin’s voltage increases. Internally there is a 5kΩ
pullup to +5.2V.
4
VCC
9.6V output from the internal high voltage series pass An external voltage (10V - 15V) can be applied to this pin
regulator
to shutdown the internal regulator, thereby reducing
internal dissipation. An internal diode connects Vcc to
Vin.
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
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.
Copyright © 2004–2005, Texas Instruments Incorporated