component
OB2535CPA
Public Made by Adomby adom
OB On Bright Elec AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdownOB2535CPA
OB On Bright Elec · AC-DC Controllers And Regulators · SOP-8
OB2535CPA 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 pin: the output shuts down when VDD falls below UVLO(ON) of 8.2-10.5 V, and VDD is clamped at VDD_clamp of 27-30 V (IDD=10 mA) with VDD OVP at 26-29 V. |
| 2 | COMP | input | Loop compensation pin for CV stability; its voltage sets the cable-drop compensation current into INV, with a maximum of 37.5 uA at INV=2 V, COMP=0 V. |
| 3 | INV | input | Voltage feedback input from the auxiliary winding through a resistor divider, compared against a 2.00 V reference (1.97-2.03 V), with PWM duty set by the EA output and the current sense signal at CS. |
| 4 | CS | input | Current sense input for the switch current; the over-current threshold is 880-940 mV (910 mV typical) with 625 ns leading-edge blanking, 110 ns propagation delay and 50 kOhm input impedance, and the external sense resistor Rs sets the CC point. |
| 5 | DRAIN | output | HV MOSFET drain connected to the primary lead of the transformer, with a drain-source breakdown voltage (BVdss) of 600 V. |
| 6 | DRAIN | output | HV MOSFET drain connected to the primary lead of the transformer, with a drain-source breakdown voltage (BVdss) of 600 V. |
| 7 | GND | power_in | Ground reference pin; the datasheet gives no additional electrical limits for this pin. |
| 8 | GND | power_in | Ground reference pin; the datasheet gives no additional electrical limits for this pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | OB On Bright Elec |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Standby Current | I DD ST | 5 | 20 | uA | VDD=13V | 5 | |
| Operation Current | I DD op | 2 | 3 | mA | INV=2V, CS=0V, VDD=VDDG=18V | 5 | |
| VDD Under Voltage Lockout (enter, falling) | UVLO(ON) | 8.2 | 9 | 10.5 | V | Enter VDD falling | 5 |
| VDD Under Voltage Lockout (exit, rising) | UVLO(OFF) | 13.5 | 14.8 | 16 | V | Exit VDD rising | 5 |
| Maximum VDD operation voltage (clamp) | VDD_clamp | 27 | 28.5 | 30 | V | IDD=10mA | 5 |
| Over voltage protection threshold | OVP | 26 | 27.5 | 29 | V | Ramp VDD until gate shut down | 5 |
| LEB time | TLEB | 625 | ns | 5 | |||
| Over current threshold | Vth_oc | 880 | 910 | 940 | mV | 5 | |
| OCP Propagation delay | Td_oc | 110 | ns | 5 | |||
| Input Impedance | ZSENSE_IN | 50 | Kohm | 5 | |||
| Soft start time | T_ss | 17 | ms | 5 | |||
| IC Maximum frequency | Freq_Max | 55 | 60 | 65 | KHz | 5 | |
| System nominal switch frequency | Freq_Nom | 50 | KHz | 5 | |||
| Startup switch frequency | Freq_startup | 14 | KHz | INV=0V, Comp=5V | 5 | ||
| Frequency shuffling range | △f/Freq | -6 | 6 | % | 5 | ||
| Reference voltage for EA | Vref_EA | 1.97 | 2 | 2.03 | V | 5 | |
| DC gain of EA | Gain | 60 | dB | 5 | |||
| Max. cable compensation current | I_COMP_MAX | 37.5 | uA | INV=2V, Comp=0V | 5 | ||
| MOSFET Drain-Source Breakdown Voltage | BVdss | 600 | V | 5 | |||
| On Resistance | Rdson | 12 | 15 | Ώ | Static, Id=0.4A | 5 | |
| Drain Voltage (off state) | -0.3 | V | Maximum is Bvdss (not a numeric value in datasheet) | 2 | |||
| VDD Voltage | -0.3 | V | Maximum is VDD_clamp (not a numeric value in datasheet) | 2 | |||
| VDD Zener Clamp continuous current | 10 | mA | Continuous current | 2 | |||
| COMP Voltage | -0.3 | 7 | V | 2 | |||
| CS Input Voltage | -0.3 | 7 | V | 2 | |||
| INV Input Voltage | -0.3 | 7 | V | 2 | |||
| Max Operating Junction Temperature | TJ | -40 | 150 | °C | 2 | ||
| Storage Temperature | Tstg | -55 | 150 | °C | 2 | ||
| Lead Temperature (Soldering) | 260 | °C | Soldering, 10 secs | 2 | |||
| Thermal resistance junction to ambient (SOP8) | RθJA | 90 | ℃/W | Drain pin connected to 100mm2 PCB copper clad | 2 |
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 |
|---|---|---|---|---|
| contacts | copper | Note: Drain Pin Connected 100mm2 PCB copper | 2 |
CAD (KiCad official)
- Symbol:
OB2535CPA - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
ob2535cpa-etched.step/ob2535cpa-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ob2535cpa.step/ob2535cpa.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
a63f62526a72215c, 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).