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LM25037QMT Datasheet(PDF) 9 Page - Texas Instruments |
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LM25037QMT Datasheet(HTML) 9 Page - Texas Instruments |
9 / 37 page VIN VCC SS OSCILLATOR CLK PWM VCC/REF UVLO CS RAMP CLK + LEB OUTA DRIVER OUTB VCC COMP SS UVLO RES CLK 8 PA DRIVER 5V Reference REF STANDBY SHUTDOWN SS PWM LOGIC Standby S R Q AGND PGND +5V Hiccup RESTART DELAY RT2 VCC FB ERROR AMP J Q Q K SET CLR SS Buffer Shutdown 7.7V LDO UVLO HYSTERESIS (22 PA) RT1/SYNC THERMAL LIMIT ( 165°C) 1V Restart Current Source Logic 18 PA 5k +5V +5V +5V 1.25V 1.25V 0.45V MODE CONTROL LOGIC 1 PA 100 PA 0.25V SOFT-START SOFT-STOP 100 PA 2.0V LM25037, LM25037-Q1 www.ti.com SNVS572E – JULY 2008 – REVISED JANUARY 2016 7 Detailed Description 7.1 Overview The LM25037 PWM controller contains all the features necessary to implement double-ended power converter topologies such as push-pull, half-bridge and full-bridge. The unique architecture allows the modulator to be configured for either voltage-mode or current-mode control. The LM25037 provides two alternating gate driver outputs to drive the primary side power MOSFETs with programmable forced dead-time. The LM25037 can be configured to operate with bias voltages ranging from 5.5 V to 75 V. Additional features include line undervoltage lockout, cycle-by-cycle current limit, voltage feed-forward compensation, and hiccup mode fault protection with adjustable delays, soft-start, and a 2-MHz capable oscillator with synchronization capability, precision reference, and thermal shutdown. These rich set of features simplify the design of double ended topologies. The functional block diagram is show in the Functional Block Diagram section. 7.2 Functional Block Diagram Copyright © 2008–2016, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM25037 LM25037-Q1 |
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