LM25037 - Dual-Mode PWM Controller With Alternating Outputs

	LM25037 - Dual-Mode PWM Controller With Alternating Outputs from the PowerWise® Family

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Knowledge Base

Features

•	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

Parametric Table expand

Parametric Table collapse

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

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

Adj Switch Frequency Yes

Frequency Min 50 kHz

Frequency Max 2000 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

Efficiency (peak) 88 %

Multiple Output Capability No

AEC Q-100 Automotive Grade 0

Automotive Selection Guide No

PowerWise Yes

View Using Catalog

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
LM5102	100V High Voltage Half-Bridge Gate Driver
LM5037	High Voltage Version 13V To 100V Input

Block Diagram

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Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM25037 Dual-Mode PWM Controller With Alternating Outputs	464 Kbytes	15-Oct-08	View Online Download

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LM25037MT

TSSOP

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$1.35

rail
of
92

NSUZXYTT
L25037
MT

12 weeks

N/A

LM25037MTX

TSSOP

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$1.35

reel
of
2500

NSUZXYTT
L25037
MT

6 weeks

N/A

LM25037EVAL

Evaluation Boards for LM25037 - Dual PWM Controller with Alternating Outputs

Full production

N/A

$105.00

8 weeks

N/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.

Application Notes

Title	Size in Kbytes	Date
AN-1861: Application Note 1861 LM25037 Evaluation Board	1088 Kbytes	18-Dec-08	Download

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[Information as of 7-Jan-2009]