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OB6561PCPA

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by Ray

OB On Bright Elec PFC Controllers, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpower management (pmic)ob6561pcpa
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Datasheet

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Contents

README

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OB6561PCPA

OB On Bright Elec · PFC Controllers · SOP-8

OB6561PCPA from OB On Bright Elec, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 INV input Inverting input of the internal error amplifier. Connected to a resistor divider from the boost output to sense system output voltage; reference is 2.5 V typ. Also used for system open-loop protection (threshold ~0.25 V).
2 COMP output Error amplifier output. External loop compensation network (RC) is placed between COMP and INV. Also used for dynamic/static OVP sensing (source current ~40 uA triggers dynamic OVP; static threshold 2.25 V).
3 MULT input Multiplier input. Connected via resistor divider to the rectified line voltage (after bridge diodes) to provide a sinusoidal reference to the current loop. Linear operating range 0 to 3.5 V.
4 CS input Current sense input. Connected to the MOSFET source current-sense resistor; internal 40 kOhm/8 pF RC filter and 1.7 V clamp. Feeds the PWM current-sense comparator for cycle-by-cycle current limiting.
5 ZCD input Zero-current detection input from the auxiliary/ZCD winding. Rising-edge threshold ~1.9 V triggers the next switching cycle (TM operation). Tying ZCD to GND (Vdis threshold 150-350 mV) disables the device. Absolute I_ZCD limits: 50 mA source / -10 mA sink.
6 GND power_in Device ground. Common return for signal, control, and gate-driver currents.
7 GD output Gate driver output. Totem-pole driver for external power MOSFET; VoH >= 8 V @ 100 mA, VoL <= 1.5 V @ 100 mA. Rise ~80 ns / fall ~30 ns into 1 nF. High-state clamp Voclamp ~16 V protects the MOSFET gate.
8 VCC power_in DC supply voltage. Operating range 9.5 V to 28 V (post-startup 11 V to 28 V); UVLO turn-on ~12 V, turn-off ~9.5 V (hysteresis ~2.5 V). Internal zener clamp ~33 V; absolute max 30 V. Start-up current ~35 uA, operating Icc ~4 mA.

Key specifications

Parameter Value
Manufacturer OB On Bright Elec
Package SOP-8
Category Power Management (PMIC)
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • OB6561PCPA
  • OB6561PCPAP

CAD (KiCad official)

  • Symbol: OB6561PCPA
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: OB On Bright Elec datasheet (13 pp, sha256 05fddf1ba88a0fb3, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF