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OB3655PCPA-H

Public Made by Adom

by 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.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 (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