LM5037_14 Datasheet, PDF (1/33 Pages) Texas Instruments – Dual-Mode PWM Controller With Alternating Outputs

LM5037
www.ti.com
SNVS578B – NOVEMBER 2008 – REVISED JANUARY 2010
LM5037 Dual-Mode PWM Controller With Alternating Outputs
Check for Samples: LM5037
FEATURES
1
•2 High voltage (100V) start-up regulator
• Alternating outputs for double-ended
topologies
• Current-mode or feed-forward voltage-mode
control
• Programmable maximum duty cycle lLimit
• 2% feedback reference accuracy
• High gain-bandwidth error amplifier
• Programmable line under-voltage lockout
(UVLO) with adjustable hysteresis
• Versatile dual mode over-current protection
with hiccup delay timer
• Programmable soft-start
• Precision 5V reference output
• Current sense leading edge blanking
• Resistor programmed 2 MHz capable oscillator
• Oscillator synchronization capability with low
frequency lockout protection
DESCRIPTION
The LM5037 PWM controller contains all the features necessary to implement balanced double-ended power
converter topologies, such as push-pull, half-bridge and full-bridge. These double-ended topologies allow for
higher efficiencies and greater power densities compared to common single-ended topologies such as the
flyback and forward. The LM5037 can be configured for either voltage mode or current mode control with
minimum external components. Two alternating gate drive outputs are provided, each capable of 1.2A peak
output current. The LM5037 can be configured to operate directly from the input voltage rail over a wide range of
13V to 100V. Additional features include programmable maximum duty cycle limit, line under-voltage lockout,
cycle-by-cycle current limit and a hiccup mode fault protection with adjustable timeout delay, soft-start and a 2
MHz capable oscillator with synchronization capability, precision reference and thermal shutdown.
Package
• TSSOP-16
Simplified Push-Pull Power Converter
VIN
VOUT
LM5037
VIN
VCC
UVLO OUTA
REF
RT1
RT2
OUTB
RAMP
CS
RES COMP
SS
FB
PGND AGND
Isolated
Feedback
1
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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.
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