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LD7750EGR

Public Made by Adom

by adom

Leadtrend Tech AC-DC Controllers And Regulators, SOP-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LD7750EGR

Leadtrend Tech · AC-DC Controllers And Regulators · SOP-7

LD7750EGR from Leadtrend Tech, in a SOP-7. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 OTP input Pulling this pin below 0.95V shuts down the controller; an NTC from this pin to ground provides over-temperature protection, and leaving it floating or adding a 100kΩ resistor disables the latch protection.
2 COMP input Voltage feedback pin that receives the photo-coupler signal to close the control loop for regulation; pulling it below 1.8V turns the controller off.
3 CS input Current sense pin for sensing the MOSFET current, with a maximum input voltage threshold of 0.85V typical (0.80V to 0.90V).
4 GND power_in Ground reference for the controller.
5 OUT output Gate drive output that drives the external power MOSFET, with 500mA driving capability.
6 VCC power_in Supply voltage pin with UVLO thresholds of 16V (on) and 10V (off) and an absolute maximum rating of 30V.
8 HV power_in High-voltage pin connected to the positive terminal of the bulk capacitor to supply startup current, rated 500V, and turned off once VCC reaches UVLO(on).

Key specifications

Parameter Value
Manufacturer Leadtrend Tech
Package SOP-7
Category Power Management (PMIC)
Pins 7

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage VCC VCC -0.3 30 V 4
High-Voltage Pin, HV HV -0.3 500 V 4
COMP, OTP, CS -0.3 7 V 4
OUT -0.3 V 4
Maximum Junction Temperature 150 °C 4
Operating Ambient Temperature -40 85 °C 4
Operating Junction Temperature -40 125 °C 4
Storage Temperature Range -65 150 °C 4
Package Thermal Resistance (SOP-7/SOP-8) 160 °C/W SOP-7/SOP-8 package 4
Power Dissipation (SOP-7/SOP-8) 400 mW SOP-7/SOP-8, Ambient Temperature = 85°C 4
Lead temperature (Soldering, 10sec) 260 °C Soldering, 10sec 4
ESD Voltage Protection, Human Body Model (except HV Pin) 2.5 KV Human Body Model (except HV Pin) 4
ESD Voltage Protection, Machine Model 250 V Machine Model 4
Gate Output Current 500 mA 4
High-Voltage Current Source 0.5 1 1.5 mA VCC< UVLO(on), HV=500V 5
Off-State Leakage Current 35 μA VCC> UVLO(off), HV=500V 5
Startup Current 320 μA 5
Operating Current 1.2 mA with 1nF load on OUT pin; VCOMP=0V 5
Operating Current 2.3 mA with 1nF load on OUT pin; VCOMP=3V 5
Operating Current 0.6 mA with 1nF load on OUT pin; OLP tripped 5
Operating Current 0.7 mA with 1nF load on OUT pin; OVP tripped, VCC=OVP 5
UVLO (off) 9 10 11 V 5
UVLO (on) 15 16 17 V 5
OVP Level 25 26 27 V 5
Short Circuit Current 0.2 0.26 0.32 mA VCOMP=0V 5
Open Loop Voltage 5.5 6 6.5 V COMP pin open 5
Green Mode Threshold VCOMP 2.75 V 5
Zero Duty 1.7 1.8 1.9 V 5
Maximum Input Voltage, Vcs_off Vcs_off 0.8 0.85 0.9 V 5
Leading Edge Blanking Time 160 250 320 ns 5
Input impedance 1 MΩ 5
Delay to Output 100 ns 5
Frequency 61 65 69 KHz 5
Green Mode Frequency 22 KHz 5
Trembling Frequency -4 4 kHz VCOMP=4.5V 5
Temp. Stability 5 % -20°C~85°C 5
Voltage Stability 1 % VCC=11V-25V 5
OTP Pin Source Current 92 100 108 μA 6
Turn-On Trip Level 1 1.05 1.1 V 6
Turn-Off Trip Level 0.9 0.95 1 V 6
Output Low Level 1 V VCC=15V, Io=20mA 6
Output High Level 9 V VCC=15V, Io=20mA 6
Rising Time 100 160 ns Load Capacitance=1000pF 6
Falling Time 30 60 ns Load Capacitance=1000pF 6
OLP Trip Level 4.8 5 5.2 V 6
OLP Delay Time 57 64 70 ms 6
Soft Start Duration 2 ms 6
OTP Level 140 °C 6
OTP Hysteresis 30 °C 6

CAD (KiCad official)

  • Symbol: LD7750EGR
  • Footprint: Package_SO:SOIC-8-N7_3.9x4.9mm_P1.27mm
  • 3D model: SOP-7 (KiCad packages3D, STEP)
  • 3D model files: ld7750egr-etched.step / ld7750egr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ld7750egr.step / ld7750egr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Leadtrend Tech datasheet (19 pp, sha256 13824353fb043256, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF