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COS3122SR
Public Made by Adomby adom
COSINE Gate Drivers, 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
markdownCOS3122SR
COSINE · Gate Drivers · SOP-8
COS3122SR from COSINE, 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 | Bias supply for the MOSFET driver, rated 4.5V to 18V with respect to the GND pin, and should be bypassed with local ceramic capacitors (1.0 µF suggested). |
| 2 | INPUT | input | TTL/CMOS compatible control input with 300 mV of hysteresis, and the output is held LOW if this input is unbiased or floating. |
| 3 | EN | input | TTL/CMOS compatible enable input that must be pulled LOW to inhibit the driver, forcing the output low regardless of the input state; it is internally pulled up to VDD through 100 kΩ for active-high operation. |
| 4 | GND | power_in | Device return ground that should have a low-impedance connection to the bias supply return, since high peak current flows out of this pin when the capacitive load discharges. |
| 5 | GND | power_in | Device return ground that should have a low-impedance connection to the bias supply return, since high peak current flows out of this pin when the capacitive load discharges. |
| 6 | OUTPUT | output | CMOS push-pull driver output with equal pull-up and pull-down strength, held LOW if the input is unbiased or floating; peak output current is 9 A. |
| 7 | OUTPUT | output | CMOS push-pull driver output with equal pull-up and pull-down strength, held LOW if the input is unbiased or floating; peak output current is 9 A. |
| 8 | VDD | power_in | Bias supply for the MOSFET driver, rated 4.5V to 18V with respect to the GND pin, and should be bypassed with local ceramic capacitors (1.0 µF suggested). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| Package | SOP-8 |
| Category | Motor Driver ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| DC Supply Voltage (Operating Voltage Range) | VDD | 4.5 | 18 | V | 5 | ||
| DC Supply Voltage (Recommended Operating Conditions) | VDD | 4.5 | 18 | V | 4 | ||
| DC supply voltage (Absolute Maximum) | VDD | 25 | V | 4 | |||
| Operating junction temperature | -40 | 125 | °C | 4 | |||
| Storage temperature | -55 | 150 | °C | 4 | |||
| Operating ambient temperature | -40 | 125 | °C | 4 | |||
| Input Signal High Threshold | VIH | 1.6 | V | 5 | |||
| Input Signal Low Threshold | VIL | 0.7 | V | 5 | |||
| Low Output Voltage | VOL | 0.025 | V | DC Test | 5 | ||
| Non-inverting Input Current (Input Signal High Current) | IIH | 88 | 125 | µA | VINX=18V | 5 | |
| Inverting Input Current (Input Signal Low Current) | IIL | 88 | 125 | µA | VINX=0V | 5 | |
| Under-Voltage Lockout ON Threshold | 3.7 | 4.1 | V | 5 | |||
| Input Signal Hysteresis | VHYS | 0.3 | V | 5 | |||
| Inverting Input Current (Input Signal High Current) | IIH | 0.01 | µA | Inverting Input Current, VINX=18V | 5 | ||
| Non-inverting Input Current (Input Signal Low Current) | IIL | 0.01 | µA | Non-inverting Input Current, VINX=0V | 5 | ||
| Pull-Up Resistance | ROH | 0.83 | Ω | Source Current = 10mA | 5 | ||
| Pull-Down Resistance | ROL | 0.5 | Ω | Sink Current = -10mA | 5 | ||
| Peak Output Current | IPK | 9 | A | 10V≤ VDD ≤18V | 5 | ||
| Power Supply Current | ICC | 0.85 | mA | VIN=3V | 5 | ||
| Power Supply Current | ICC | 0.65 | mA | VIN=0V | 5 | ||
| Under-Voltage Lockout Hysteresis | 0.5 | V | 5 | ||||
| Rise Time | tR | 35 | ns | CL =10,000 pF | 6 | ||
| Fall Time | tF | 36 | ns | CL =10,000 pF | 6 | ||
| Turn-On Delay Time (COS3122) | tD1 | 60 | ns | COS3122, CL =10,000 pF | 6 | ||
| Turn-Off Delay Time (COS3122) | tD2 | 63 | ns | COS3122, CL =10,000 pF | 6 | ||
| Thermal Shutdown Threshold | 150 | °C | 6 | ||||
| Thermal Shutdown Threshold Hysteresis | 25 | °C | 6 | ||||
| Package Thermal Resistance, junction-to-ambient (SOP8) | RθJA | 155 | °C/W | SOP8 package | 4 |
CAD (KiCad official)
- Symbol:
COS3122SR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
cos3122sr-etched.step/cos3122sr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cos3122sr.step/cos3122sr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: COSINE datasheet (8 pp, sha256
128b6dd1d63b734a, retrieved 2026-10-19, 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).