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LD7750EGR
Public Made by Adomby adom
Leadtrend Tech AC-DC Controllers And Regulators, SOP-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLD7750EGR
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ld7750egr.step/ld7750egr.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).