component
OB3635AMP
Public Made by Adomby adom
OB On Bright Elec LED Drivers, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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OB3635AMP
OB On Bright Elec · LED Drivers · SOT-23-6
OB3635AMP from OB On Bright Elec, in a SOT-23-6. 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 | FB | input | Voltage feedback from the auxiliary winding through a resistor divider reflecting the output voltage; the FB pin falling below 0.05V (typical) starts a new switching cycle for quasi-resonant operation, and FB above 1.5V (typical) triggers LED open-circuit protection. |
| 2 | GND | power_in | Power ground. |
| 3 | VDD | power_in | Power supply input supplied from the transformer auxiliary winding; VDD over-voltage protection triggers above 32V (typical) and the absolute maximum VDD voltage is 40V. |
| 4 | GATE | output | Gate driver output for the external power MOSFET, internally clamped at 12V (typical) and pulled low when VDD falls below UVLO(ON). |
| 5 | CS | input | Current sensing terminal, connected through a sense resistor between the MOSFET source and GND; the internal leading edge blanking time is 0.4 us and the over-current threshold is 1.1V (typical) when FB is above 0.25V. |
| 6 | CMP | output | Loop compensation pin with a large external capacitor connected between CMP and GND, whose clamp-down voltage is 1.0V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | OB On Bright Elec |
| Package | SOT-23-6 |
| Category | LED Drivers |
| Pins | 6 |
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 | |||
| Gate Voltage | -0.3 | 40 | V | 2 | |||
| CS Input Voltage | -0.3 | 7 | V | 2 | |||
| FB Input Voltage | -0.3 | 7 | V | 2 | |||
| COMP 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 | |||
| VDD under voltage lockout exit | UVLO(OFF) | 16 | 18 | 20 | V | 5 | |
| VDD under voltage lockout enter | UVLO(ON) | 7 | 8 | 9 | V | 5 | |
| VDD Over Voltage Protection | VDD_OVP | 30 | 32 | 34 | V | 5 | |
| Over Current Threshold | Vth_ocp | 1.05 | 1.1 | 1.15 | V | FB>0.25V | 5 |
| Output Over Voltage Protection | Vout_ovp | 1.42 | 1.5 | 1.58 | V | 5 | |
| Error Amplifier Reference Voltage | Vref | 0.196 | 0.2 | 0.204 | V | 5 | |
| Output Up-Clamping Voltage | Vclamp | 10 | 12 | 14 | V | 5 | |
| Operation current | I op | 0.4 | 0.6 | mA | VDD=20V, no loading | 5 | |
| Start up current | I start-up | 3 | 7 | uA | VDD=UVLO(OFF)-1V | 5 | |
| LEB time | TLEB | 0.4 | us | 5 | |||
| Over Current Threshold | Vth_ocp | 0.5 | V | FB<=0.25V | 5 | ||
| Output Short Circuit Protection | Vout_scp | 0.25 | V | 5 | |||
| Maximum Clamping Frequency | Fmax | 100 | KHz | 5 | |||
| Maximum Off Time | Toff_max | 100 | us | 5 | |||
| Minimum Off Time | Toff_min | 2 | us | CS>0.15V | 5 | ||
| Minimum Off Time | Toff_min | 0.5 | us | CS<=0.15V | 5 | ||
| Maximum On Time | Ton_max | 25 | us | 5 | |||
| Error Amplifier Transconductance | Gm | 40 | uS | 5 | |||
| CMP Pin Down_clamp Voltage | Vclamp_cmp | 1 | V | 5 | |||
| Output Low Level | Vol | 1 | V | Iout=10mA | 5 | ||
| Output High Level | Voh | 6 | V | Iout=10mA | 5 | ||
| Rising Edge Time | Tr | 90 | ns | Cl=1nF | 5 | ||
| Falling Edge Time | Tf | 30 | ns | Cl=1nF | 5 | ||
| Thermal regulation threshold | TTF | 145 | ℃ | 5 | |||
| Over Temperature Protection | OTP | 170 | ℃ | 5 | |||
| Package thermal resistance junction-to-ambient | RθJA | 200 | ℃/W | SOT23-6 package | 2 |
CAD (KiCad official)
- Symbol:
OB3635AMP - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
ob3635amp-etched.step/ob3635amp-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ob3635amp.step/ob3635amp.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: OB On Bright Elec datasheet (10 pp, sha256
34e18cfb0a835ae6, 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).
# OB3635AMP
**OB On Bright Elec** · LED Drivers · SOT-23-6
OB3635AMP from OB On Bright Elec, in a SOT-23-6. 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 | FB | input | Voltage feedback from the auxiliary winding through a resistor divider reflecting the output voltage; the FB pin falling below 0.05V (typical) starts a new switching cycle for quasi-resonant operation, and FB above 1.5V (typical) triggers LED open-circuit protection. |
| 2 | GND | power_in | Power ground. |
| 3 | VDD | power_in | Power supply input supplied from the transformer auxiliary winding; VDD over-voltage protection triggers above 32V (typical) and the absolute maximum VDD voltage is 40V. |
| 4 | GATE | output | Gate driver output for the external power MOSFET, internally clamped at 12V (typical) and pulled low when VDD falls below UVLO(ON). |
| 5 | CS | input | Current sensing terminal, connected through a sense resistor between the MOSFET source and GND; the internal leading edge blanking time is 0.4 us and the over-current threshold is 1.1V (typical) when FB is above 0.25V. |
| 6 | CMP | output | Loop compensation pin with a large external capacitor connected between CMP and GND, whose clamp-down voltage is 1.0V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | OB On Bright Elec |
| Package | SOT-23-6 |
| Category | LED Drivers |
| Pins | 6 |
## 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 |
| Gate Voltage | | -0.3 | | 40 | V | | 2 |
| CS Input Voltage | | -0.3 | | 7 | V | | 2 |
| FB Input Voltage | | -0.3 | | 7 | V | | 2 |
| COMP 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 |
| VDD under voltage lockout exit | UVLO(OFF) | 16 | 18 | 20 | V | | 5 |
| VDD under voltage lockout enter | UVLO(ON) | 7 | 8 | 9 | V | | 5 |
| VDD Over Voltage Protection | VDD_OVP | 30 | 32 | 34 | V | | 5 |
| Over Current Threshold | Vth_ocp | 1.05 | 1.1 | 1.15 | V | FB>0.25V | 5 |
| Output Over Voltage Protection | Vout_ovp | 1.42 | 1.5 | 1.58 | V | | 5 |
| Error Amplifier Reference Voltage | Vref | 0.196 | 0.2 | 0.204 | V | | 5 |
| Output Up-Clamping Voltage | Vclamp | 10 | 12 | 14 | V | | 5 |
| Operation current | I op | | 0.4 | 0.6 | mA | VDD=20V, no loading | 5 |
| Start up current | I start-up | | 3 | 7 | uA | VDD=UVLO(OFF)-1V | 5 |
| LEB time | TLEB | | 0.4 | | us | | 5 |
| Over Current Threshold | Vth_ocp | | 0.5 | | V | FB<=0.25V | 5 |
| Output Short Circuit Protection | Vout_scp | | 0.25 | | V | | 5 |
| Maximum Clamping Frequency | Fmax | | 100 | | KHz | | 5 |
| Maximum Off Time | Toff_max | | 100 | | us | | 5 |
| Minimum Off Time | Toff_min | | 2 | | us | CS>0.15V | 5 |
| Minimum Off Time | Toff_min | | 0.5 | | us | CS<=0.15V | 5 |
| Maximum On Time | Ton_max | | 25 | | us | | 5 |
| Error Amplifier Transconductance | Gm | | 40 | | uS | | 5 |
| CMP Pin Down_clamp Voltage | Vclamp_cmp | | 1 | | V | | 5 |
| Output Low Level | Vol | | 1 | | V | Iout=10mA | 5 |
| Output High Level | Voh | | 6 | | V | Iout=10mA | 5 |
| Rising Edge Time | Tr | | 90 | | ns | Cl=1nF | 5 |
| Falling Edge Time | Tf | | 30 | | ns | Cl=1nF | 5 |
| Thermal regulation threshold | TTF | | 145 | | ℃ | | 5 |
| Over Temperature Protection | OTP | | 170 | | ℃ | | 5 |
| Package thermal resistance junction-to-ambient | RθJA | | 200 | | ℃/W | SOT23-6 package | 2 |
## CAD (KiCad official)
- Symbol: `OB3635AMP`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `ob3635amp-etched.step` / `ob3635amp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ob3635amp.step` / `ob3635amp.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [OB On Bright Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590226639394410496) (10 pp, sha256 `34e18cfb0a835ae6`, 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](docs/ob3635amp-datasheet.pdf)