LM5037_15 Datasheet, PDF (1/40 Pages) Texas Instruments – LM5037 Dual-Mode PWM Controller With Alternating Outputs

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LM5037
SNVS578D – NOVEMBER 2008 – REVISED MAY 2015
LM5037 Dual-Mode PWM Controller With Alternating Outputs
1 Features
•1 High-Voltage (100-V) Start-up Regulator
• Alternating Outputs for Double-Ended Topologies
• Current-mode or Feed-forward Voltage-mode
Control
• Programmable Maximum Duty Cycle Limit
• 2% Feedback Reference Accuracy
• High Gain-bandwidth Error Amplifier
• Programmable Line Undervoltage Lockout (UVLO)
with Adjustable Hysteresis
• Versatile Dual Mode Overcurrent Protection with
Hiccup Delay Timer
• Programmable Soft-start Time
• Precision 5-V Reference Output
• Current Sense Leading Edge Blanking
• Resistor Programmed 2-MHz Capable Oscillator
• Oscillator Synchronization Capability with Low-
Frequency Lockout Protection
2 Applications
• Telecom Power Converters
• Industrial Power Converters
3 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
device 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 1.2-A peak output current.
The device can be configured to operate directly from
the input voltage rail over a wide range of 13 V to
100 V.
Additional features include programmable maximum
duty cycle limit, line undervoltage 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM5037
TSSOP (16)
5.00 mm × 4.4 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application
V_IN
LM5037
VIN
VCC
V_OUT
UVLO
OUTA
REF
OUTB
RT1/SYNC RAMP
RT2
CS
RES
SS
PGND
COMP
FB
AGND
Isolated
Feedback
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.