What should engineers review before using LD5537GL?

Check the 16 V typical UVLO turn-on threshold, 0.75 V typical current-sense limit, 85% typical maximum duty cycle, brownout divider thresholds, auxiliary-winding output OVP circuit and the SOT-26 pin assignment. Confirm pin 3 from the original package documentation because the supplied datasheet contains inconsistent labeling.

What is the pinout of LD5537GL?

Use the LD5537GL datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about LD5537GL pinout to locate pins, power rails, and interface signals before layout.

LD5537GL Datasheet, Specs, Alternatives & ECAD | Leadtrend

AI summary

LD5537GL is a Leadtrend green-mode current-mode PWM controller for compact offline flyback adapters and open-frame supplies.

Best for

Low-cost offline flyback adapters
Battery chargers
Open-frame switching power supplies

Avoid if

Applications requiring a confirmed automotive qualification
Designs requiring verified lifecycle or long-term supply commitments

Check before use

Verify PCB footprint and pinout against the physical component
Size the MOSFET current-sense resistor for the controller threshold
Validate brownout and output-OVP resistor networks
Confirm thermal behavior and fault recovery in the final supply

Key specifications

Package: SOT-26, 6 pins
Peak-mode frequency: 130 kHz typical
Green-mode frequency: 23 kHz typical
Current-sense limit: 0.75 V typical
VCC UVLO turn-on: 16 V typical

Compliance & Environment

RoHS: RoHS

Application

Offline AC/DC adaptersBattery chargersOpen-frame switching supplies

Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

LD5537GL is a 6-pin SOT-26 green-mode current-mode PWM controller from Leadtrend. It is intended for offline switching power supplies and includes variable-frequency operation, UVLO, current sensing and multiple fault protections.