component

OC5738

Public Unreviewed

by Ray

OCX LED Drivers, ESOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentled-drvoc5738
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Contents

README

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OC5738

OCX · LED Drivers · ESOP-8

OC5738 from OCX, in a ESOP-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 GND power_in Device ground return. Connect to system ground with a wide, short trace to the current-sense resistor RCS.
2 VDD power_in Chip supply input. Operating range 8V-90V; UVLO rising 6.5V with 0.5V hysteresis. Bypass with a low-ESR ceramic capacitor placed close to VDD and GND.
3 NC unconnected No connection. Leave floating.
4 SW output Switching node, drain of the internal 90V power MOSFET. Connects to the buck inductor / freewheel diode. Exposed thermal pad is internally tied to SW.
5 CS input Inductor current sense input. Average voltage regulated to 200 mV typ (192-208 mV). Output current set by ILED = 0.2 / RCS. Max pin voltage 6.5V.
6 HL input High/Low brightness select. Float = full brightness (100% ILED). Pull to VDD via resistor to enter half-brightness mode (50% ILED). Internal 80 kΩ pull-down and 5.6V Zener clamp; limit ZENER current to <1 mA when sizing RHL.
7 NC unconnected No connection. Leave floating.
8 NC unconnected No connection. Leave floating.
9 EP output Exposed thermal pad, internally connected to SW (switching node). Solder to a copper island tied to SW for heat dissipation; do NOT connect to GND.

Key specifications

Parameter Value
Manufacturer OCX
Package ESOP-8
Category LED-drv
Pins 9

CAD (KiCad official)

  • Symbol: OC5738
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
  • 3D model: ESOP-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: OCX datasheet (6 pp, sha256 97a35a169100bb39, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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