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kp1221spa
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Kiwi Instruments LED Drivers, SOP-7. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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markdownKP1221SPA
Kiwi Instruments · LED Drivers · SOP-7
KP1221SPA from Kiwi Instruments, in a SOP-7. 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 | COMP | input | Constant-current output loop compensation pin. A 1-4.7 uF ceramic capacitor in series with a resistor should be connected to the chip's reference ground; the series resistor sets the over-current protection threshold (ROCP = 0 → VOCP ≈ 0.9V; 0.68kΩ → 1.2V; 2kΩ → 1.4V). Internal high/low clamp: 3V / 0.7V. |
| 2 | GND | power_in | Chip reference ground. Return for all internal circuitry and the reference for COMP, VDD, ROVP, and Source pins. |
| 3 | VDD | power_in | Chip supply pin. Normal operating voltage typ. 11.5V (10.5-13V), UVLO turn-off ≈ 8.5V, internal clamp 14V (at 5 mA). Startup current 300 uA typ; operating current 200 uA typ at Fsw = 7 kHz. Absolute max VDD = 14V. |
| 4 | ROVP | input | Output open-circuit (OVP) protection voltage setting pin. A resistor divider from the output feedback sets the OVP threshold; absolute max voltage -0.3 to 7V. |
| 5 | Drain | power_in | Drain of the internal 500V high-voltage MOSFET (Rdson ≈ 5.3 Ω for KP1221SP). Also used for HV startup charging (IHV = 10 mA at Drain = 20V). Absolute max Drain voltage -0.3 to 500V. Pin 5 is bonded together with pin 6 to the same Drain node. |
| 6 | Drain | power_in | Second Drain pin of the internal high-voltage MOSFET, bonded in parallel with pin 5 to improve current handling and thermal dissipation. Same electrical node as pin 5. |
| 7 | Source | output | Source of the internal high-voltage MOSFET; used both as switch source and current-sense node. Current-sense reference VCC_REF = 400 mV typ; min sense voltage 70 mV typ; LEB = 300 ns. Absolute max Source voltage -0.3 to 7V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Kiwi Instruments |
| Package | SOP-7 |
| Category | LED-drv |
| Pins | 7 |
Ordering variants
KP1221SPA
CAD (KiCad official)
- Symbol:
KP1221SPA - Footprint:
Package_SO:SOIC-8-N7_3.9x4.9mm_P1.27mm - 3D model: SOP-7 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Kiwi Instruments datasheet (None pp, sha256
181e31ba6808ba4d, 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).