LM25037 - Dual-Mode PWM Controller With Alternating Outputs from the PowerWise® Family
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Knowledge Base

Features
•LM25037Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified (-40°C to 125°C operating junction temperature)
•Ultra wide input operating range from 5.5V to 75V
•Alternating outputs for double-ended topologies
•Current-mode or feed-forward voltage-mode control
•Programmable maximum duty cycle limit
•2.0% 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

General Description

The LM25037 PWM controller contains all the features necessary to implement balanced double-ended power converter topologies, such as push-pull, half-bridge and full-bridge. More...


  Typical Application
*click for larger image


ParametersValues
PWM Mode Feed Forward Voltage/Current Mode
Topology Push-Pull,Half-Bridge and Full-Bridge
Input Min Voltage 5.5 Volt
Input Max Voltage 75 Volt
Frequency Max 2000 kHz
Efficiency (peak) 88 %
Adj Switch Frequency Yes
Frequency Min 50 kHz
Sync Pin Yes
Sync Type Up
UVLO Yes
On/Off Pin No
Error Flag No
Current Limit Type Cycle-Cycle and Hiccup
Gate Drive 1.2 Amp
Feedback Voltage 1.25 Volt
Feedback Tolerance 2 %
Special Features Dual-Mode control,Maximum Duty Cycle Limit, 5V Reference, Soft-Start
Temperature Min -40 deg C
Temperature Max 125 deg C
Step-Down Yes
Step-Up Yes
Flyback No
Inverting No
RegType Switching Controller
Adjustable Output Yes
Output Power 50 Watt
Switching Frequency 250 kHz
Multiple Output Capability No
AEC Q-100 Automotive Grade 1
Automotive No
PowerWise Yes


Typical Performance

*click for larger image


  Also Recommended
LM5030▲100V Push-Pull Current Mode PWM Controller
LM5035▲PWM Controller With Integrated Half-Bridge And SyncFET Drivers
LM5037▲High Voltage Version 13V To 100V Input
LM5102100V High Voltage Half-Bridge Gate Driver
Block Diagram
click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM25037/LM25037Q Dual-Mode PWM Controller With Alternating Outputs 484
Kbytes		 1-Jul-09 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM25037MTTSSOP16NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$1.35rail
of
92		NSUZXYTT
L25037
MT
6 weeksN/A
LM25037QMTTSSOP16NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$1.62rail
of
92		NSUZXYTT
M25037
MT
6 weeksN/A
LM25037MTXTSSOP16NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.35reel
of
2500		NSUZXYTT
L25037
MT
6 weeksN/A
LM25037QMTXTSSOP16NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.62reel
of
2500		NSUZXYTT
M25037
MT
6 weeksN/A
LM25037EVALEvaluation Boards for LM25037 - Dual PWM Controller with Alternating OutputsFull productionN/A
 
Buy Now 		1+$105.001-
8 weeksN/A

General Description

The LM25037 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 LM25037 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 LM25037 can be configured to operate directly from the input voltage rail over an ultra-wide range of 5.5V to 75V. 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.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM25037MTABCD150XV1038680025950002736338335
LM25037MTXABCD150XV1038680025950002736338335
LM25037QMTABCD150XV1038680025950002736338335
LM25037QMTXABCD150XV1038680025950002736338335

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1861: Application Note 1861 LM25037 Evaluation Board 1088
Kbytes		 18-Dec-08 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 7-Nov-2009]