component
CM1764
Public Made by Adomby adom
iCM(创芯微) , SOP-8. 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
markdownCM1764
iCM(创芯微) · IC · SOP-8
CM1764 from iCM(创芯微), in a SOP-8. 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 | VDD | power_in | Supply pin: the chip turns on when VDD rises to VDD_ON (15 to 17.5 V, typ. 16.5 V), shuts down when it falls to VDD_OFF (6.5 to 7.6 V, typ. 7 V), and VDD overvoltage protection acts at 40 to 47 V (typ. 43 V), with an absolute maximum of -0.3 to 45 V to GND. |
| 2 | GND | power_in | Ground reference pin for the controller and the VDD supply. |
| 3 | FB | input | Feedback input: the absolute maximum rating is -0.3 to 7 V, the overload protection threshold VOLP is 4.5 V (protection triggers after 40 ms above it), and the burst-mode threshold is 1.15 V. |
| 4 | CS | input | Current sense input for primary-side peak current limiting: the absolute maximum rating is -0.5 to 7 V, the per-cycle overcurrent threshold VOCPP is 0.676 to 0.764 V (typ. 0.72 V), and the leading-edge blanking time is 300 nS. |
| 5 | Drain | passive | Drain of the internal 650 V power MOSFET, with a minimum drain-source breakdown voltage BVDSS of 650 V. |
| 6 | Drain | passive | Drain of the internal 650 V power MOSFET, with a minimum drain-source breakdown voltage BVDSS of 650 V. |
| 7 | Drain | passive | Drain of the internal 650 V power MOSFET, with a minimum drain-source breakdown voltage BVDSS of 650 V. |
| 8 | Drain | passive | Drain of the internal 650 V power MOSFET, with a minimum drain-source breakdown voltage BVDSS of 650 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | iCM(创芯微) |
| Package | SOP-8 |
| Category | |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input AC voltage range | VACin | 85 | 264 | V | 4 | ||
| VDD supply to GND voltage | VDD | -0.3 | 45 | V | 4 | ||
| FB pin voltage | FB | -0.3 | 7 | V | 4 | ||
| CS pin voltage | CS | -0.5 | 7 | 4 | |||
| Storage temperature | Tstg | -55 | 150 | ℃ | 4 | ||
| Operating junction temperature | TJ | -40 | 150 | ℃ | 4 | ||
| Soldering temperature | Tsolder | 260 | ℃ | 10s | 4 | ||
| ESD human body model | ESD | 3 | KV | Human body model | 4 | ||
| Power MOSFET breakdown voltage (absolute maximum) | BVDSS | 650 | V | 4 | |||
| VDD turn-on voltage | VDD_ON | 15 | 16.5 | 17.5 | V | 5 | |
| VDD turn-off voltage | VDD_OFF | 6.5 | 7 | 7.6 | V | 5 | |
| VDD overvoltage protection | VDD_OVP | 40 | 43 | 47 | V | 5 | |
| Minimum operating frequency | FMIN | 20 | 23 | 26.6 | KHz | 5 | |
| Frequency jitter range | ΔF | -7 | 7 | % | 5 | ||
| Overtemperature protection threshold | OTP | 140 | 150 | 160 | ℃ | 5 | |
| Primary cycle-by-cycle overcurrent protection threshold | VOCPP | 0.676 | 0.72 | 0.764 | V | 5 | |
| Startup current | IST | 10 | µA | VDD=10V | 5 | ||
| Burst mode operating current | IDD_BURST | 500 | µA | 5 | |||
| FB open-loop voltage | VFB_OPEN | 5.1 | V | 5 | |||
| FB short-circuit current | IFB_SHORT | 210 | µA | 5 | |||
| Overload protection threshold | VOLP | 4.5 | V | 5 | |||
| Green mode (frequency reduction) threshold | VREF_GREEN | 1.85 | V | 5 | |||
| Burst mode threshold | VREF_BURST | 1.15 | V | 5 | |||
| Soft-start time | TSS | 4 | mS | 5 | |||
| Leading-edge blanking time | TLEB | 300 | nS | 5 | |||
| Secondary rectifier short-circuit protection threshold | VSRSP | 1.4 | V | 5 | |||
| Output overcurrent protection threshold | VOCPS | 0.3 | V | 5 | |||
| Maximum primary duty cycle | DUTY_MAX | 80 | % | 5 | |||
| Maximum operating frequency | FMAX | 65 | KHz | 5 | |||
| Overtemperature protection hysteresis | ΔT | 30 | ℃ | 5 | |||
| Drain-source breakdown voltage | BVDSS | 650 | V | VGS=0V,ID=250µA | 5 | ||
| Drain-source on-resistance | RDSON | 1.5 | Ω | VGS=10V,ID=1A | 5 |
CAD (KiCad official)
- Symbol:
CM1764 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
cm1764-etched.step/cm1764-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cm1764.step/cm1764.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: iCM(创芯微) datasheet (11 pp, sha256
6760bee48cce39cd, retrieved 2026-10-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).