component
OB3655PCPA-H
Public Made by Adomby adom
OB(On-Bright Elec) LED Drivers, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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OB3655PCPA-H
OB(On-Bright Elec) · LED Drivers · SOP-8
OB3655PCPA-H from OB(On-Bright Elec), 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 | Power supply input; VDD_clamp is 28-32 V, UVLO(ON) 7-9 V and UVLO(OFF) 16-20 V, and the absolute maximum VDD voltage is -0.3 to 40 V. |
| 2 | FB | input | Voltage feedback terminal used for quasi-resonant detection (FB falls below 0.05 V typical), output over-voltage protection at 1.42-1.58 V, and short-circuit detection near 0.25 V; absolute maximum -0.3 to 7 V. |
| 3 | GND | power_in | Power ground for the device. |
| 4 | CMP | bidirectional | Loop compensation pin with a capacitor connected between CMP and GND; CMP voltage is limited to -0.3 to 7 V absolute maximum and its down-clamp voltage is 1.0 V. |
| 5 | CS | input | Current sensing terminal, with a sense resistor connected between CS and GND for cycle-by-cycle current limiting at an over-current threshold of 0.5 V; absolute maximum -0.3 to 7 V. |
| 6 | NC | unconnected | Non-connection pin, listed as NC in the terminal assignment table. |
| 7 | DRAIN | bidirectional | MOSFET drain terminal; the drain-source breakdown voltage (BVdss) is listed as 650 V for OB3655PCP-H. |
| 8 | DRAIN | bidirectional | MOSFET drain terminal (pin 8 is shared with pin 7 per the terminal table); the drain-source breakdown voltage (BVdss) is listed as 650 V for OB3655PCP-H. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | OB(On-Bright Elec) |
| Package | SOP-8 |
| Category | LED Drivers |
| 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 |
|---|---|---|---|---|---|---|---|
| VDD Voltage | -0.3 | 40 | V | 2 | |||
| CS Input Voltage | -0.3 | 7 | V | 2 | |||
| FB Input Voltage | -0.3 | 7 | V | 2 | |||
| CMP Voltage | -0.3 | 7 | V | 2 | |||
| Min/Max Operating Junction Temperature | TJ | -40 | 150 | ℃ | 2 | ||
| Min/Max Storage Temperature | Tstg | -55 | 150 | ℃ | 2 | ||
| Lead Temperature (Soldering) | 260 | ℃ | Soldering, 10secs | 2 | |||
| Body Surface Max. Temperature | 135 | ℃ | 2 | ||||
| Package thermal resistance junction-to-ambient (SOP8) | RθJA | 90 | ℃/W | 2 | |||
| Start up current | I start-up | 3 | 7 | uA | VDD=UVLO(OFF)-1V | 6 | |
| Operation current | I op | 0.4 | 0.6 | mA | VDD=20V, no loading | 6 | |
| VDD under voltage lockout exit | UVLO(OFF) | 16 | 18 | 20 | V | 6 | |
| VDD under voltage lockout enter | UVLO(ON) | 7 | 8 | 9 | V | 6 | |
| VDD clamping Voltage | VDD_clamp | 28 | 30 | 32 | V | 6 | |
| Output Over Voltage Protection | Vout_ovp | 1.42 | 1.5 | 1.58 | V | 6 | |
| Error Amplifier Reference Voltage | Vref | 0.196 | 0.2 | 0.204 | V | 6 | |
| LEB time | TLEB | 0.4 | us | 6 | |||
| Over Current Threshold | Vth_ocp | 0.5 | V | 6 | |||
| Output Short Circuit Protection | Vout_scp | 0.25 | V | 6 | |||
| Maximum Sink current from FB | I_FB | 2 | mA | 6 | |||
| Maximum Clamping Frequency | Fmax | 100 | KHz | 6 | |||
| Maximum Off Time | Toff_max | 100 | us | 6 | |||
| Minimum Off Time | Toff_min | 2 | us | CS>0.15V | 6 | ||
| Minimum Off Time | Toff_min | 0.5 | us | CS<=0.15V | 6 | ||
| Maximum On Time | Ton_max | 25 | us | 6 | |||
| Error Amplifier Transconductance | Gm | 40 | uS | 6 | |||
| CMP Pin Down_clamp Voltage | Vclamp_cmp | 1 | V | 6 | |||
| Thermal regulation threshold | TTF | 145 | ℃ | 6 | |||
| Over Temperature Protection | OTP | 170 | ℃ | 6 | |||
| MOSFET Drain-Source Breakdown Voltage (OB3655PCP-H) | BVdss | 650 | V | 6 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | Abs | Body Surface Max. 135℃ Absolute Maximum Ratings | 2 |
CAD (KiCad official)
- Symbol:
OB3655PCPA-H - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
ob3655pcpa-h-etched.step/ob3655pcpa-h-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ob3655pcpa-h.step/ob3655pcpa-h.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: OB(On-Bright Elec) datasheet (12 pp, sha256
1b25e725b953878d, retrieved 2026-10-22, 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).
# OB3655PCPA-H
**OB(On-Bright Elec)** · LED Drivers · SOP-8
OB3655PCPA-H from OB(On-Bright Elec), 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 | Power supply input; VDD_clamp is 28-32 V, UVLO(ON) 7-9 V and UVLO(OFF) 16-20 V, and the absolute maximum VDD voltage is -0.3 to 40 V. |
| 2 | FB | input | Voltage feedback terminal used for quasi-resonant detection (FB falls below 0.05 V typical), output over-voltage protection at 1.42-1.58 V, and short-circuit detection near 0.25 V; absolute maximum -0.3 to 7 V. |
| 3 | GND | power_in | Power ground for the device. |
| 4 | CMP | bidirectional | Loop compensation pin with a capacitor connected between CMP and GND; CMP voltage is limited to -0.3 to 7 V absolute maximum and its down-clamp voltage is 1.0 V. |
| 5 | CS | input | Current sensing terminal, with a sense resistor connected between CS and GND for cycle-by-cycle current limiting at an over-current threshold of 0.5 V; absolute maximum -0.3 to 7 V. |
| 6 | NC | unconnected | Non-connection pin, listed as NC in the terminal assignment table. |
| 7 | DRAIN | bidirectional | MOSFET drain terminal; the drain-source breakdown voltage (BVdss) is listed as 650 V for OB3655PCP-H. |
| 8 | DRAIN | bidirectional | MOSFET drain terminal (pin 8 is shared with pin 7 per the terminal table); the drain-source breakdown voltage (BVdss) is listed as 650 V for OB3655PCP-H. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | OB(On-Bright Elec) |
| Package | SOP-8 |
| Category | LED Drivers |
| 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 |
|---|---|---|---|---|---|---|---|
| VDD Voltage | | -0.3 | | 40 | V | | 2 |
| CS Input Voltage | | -0.3 | | 7 | V | | 2 |
| FB Input Voltage | | -0.3 | | 7 | V | | 2 |
| CMP Voltage | | -0.3 | | 7 | V | | 2 |
| Min/Max Operating Junction Temperature | TJ | -40 | | 150 | ℃ | | 2 |
| Min/Max Storage Temperature | Tstg | -55 | | 150 | ℃ | | 2 |
| Lead Temperature (Soldering) | | | | 260 | ℃ | Soldering, 10secs | 2 |
| Body Surface Max. Temperature | | | | 135 | ℃ | | 2 |
| Package thermal resistance junction-to-ambient (SOP8) | RθJA | | 90 | | ℃/W | | 2 |
| Start up current | I start-up | | 3 | 7 | uA | VDD=UVLO(OFF)-1V | 6 |
| Operation current | I op | | 0.4 | 0.6 | mA | VDD=20V, no loading | 6 |
| VDD under voltage lockout exit | UVLO(OFF) | 16 | 18 | 20 | V | | 6 |
| VDD under voltage lockout enter | UVLO(ON) | 7 | 8 | 9 | V | | 6 |
| VDD clamping Voltage | VDD_clamp | 28 | 30 | 32 | V | | 6 |
| Output Over Voltage Protection | Vout_ovp | 1.42 | 1.5 | 1.58 | V | | 6 |
| Error Amplifier Reference Voltage | Vref | 0.196 | 0.2 | 0.204 | V | | 6 |
| LEB time | TLEB | | 0.4 | | us | | 6 |
| Over Current Threshold | Vth_ocp | | 0.5 | | V | | 6 |
| Output Short Circuit Protection | Vout_scp | | 0.25 | | V | | 6 |
| Maximum Sink current from FB | I_FB | | 2 | | mA | | 6 |
| Maximum Clamping Frequency | Fmax | | 100 | | KHz | | 6 |
| Maximum Off Time | Toff_max | | 100 | | us | | 6 |
| Minimum Off Time | Toff_min | | 2 | | us | CS>0.15V | 6 |
| Minimum Off Time | Toff_min | | 0.5 | | us | CS<=0.15V | 6 |
| Maximum On Time | Ton_max | | 25 | | us | | 6 |
| Error Amplifier Transconductance | Gm | | 40 | | uS | | 6 |
| CMP Pin Down_clamp Voltage | Vclamp_cmp | | 1 | | V | | 6 |
| Thermal regulation threshold | TTF | | 145 | | ℃ | | 6 |
| Over Temperature Protection | OTP | | 170 | | ℃ | | 6 |
| MOSFET Drain-Source Breakdown Voltage (OB3655PCP-H) | BVdss | | 650 | | V | | 6 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | Abs | | Body Surface Max. 135℃ Absolute Maximum Ratings | 2 |
## CAD (KiCad official)
- Symbol: `OB3655PCPA-H`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ob3655pcpa-h-etched.step` / `ob3655pcpa-h-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ob3655pcpa-h.step` / `ob3655pcpa-h.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [OB(On-Bright Elec) datasheet](docs/ob3655pcpa-h-datasheet.pdf) (12 pp, sha256 `1b25e725b953878d`, retrieved 2026-10-22, 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](docs/ob3655pcpa-h-datasheet.pdf)