component
NCP1256ASN65T1G
Public Made by Adomby adom
onsemi Power Modules, TSOP-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownNCP1256ASN65T1G
onsemi · Power Modules · TSOP-6
NCP1256ASN65T1G from onsemi, in a TSOP-6. 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 | GND | power_in | The controller ground. |
| 2 | FB | input | Feedback pin; hooking an optocoupler collector to this pin allows regulation. |
| 3 | BO/OVP | input | Adjusts the brown-out level (below the programmed level the controller stops, above it can start) and is a latch input that latches the part off when brought above 4.5 V for four consecutive clock cycles. |
| 4 | CS | input | Monitors the primary peak current, offers over power protection (OPP) adjustment, and permanently latches the part off when brought above 1.5 V during the off time. |
| 5 | VCC | power_in | Supplies the controller from an external auxiliary voltage; an OVP comparator monitors this pin (typically 26 V for more than 20 us) to latch the converter in fault conditions. |
| 6 | DRV | output | Driver output to an external MOSFET gate, with +500 mA/-500 mA source/sink drive capability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TSOP-6 |
| Category | Power Management ICs |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply voltage, Vcc pin, continuous | Vcc | -0.3 | 28 | V | 4 | ||
| Maximum voltage on low power pins CS, FB and BO | -0.3 | 10 | V | 4 | |||
| Thermal resistance junction-to-air | RθJ-A | 360 | °C/W | 4 | |||
| Maximum junction temperature | TJ,max | 150 | °C | 4 | |||
| Storage temperature range | -60 | 150 | °C | 4 | |||
| ESD HBM | HBM | 4 | kV | JEDEC JESD22-A114F | 4 | ||
| ESD Machine Model | MM | 200 | V | JEDEC JESD22-A115C | 4 | ||
| ESD CDM | CDM | 750 | V | JEDEC JESD22-C101E | 4 | ||
| VCC increasing level at which driving pulses are authorized | VCCON | 16 | 18 | 20 | V | 5 | |
| VCC decreasing level at which driving pulses are stopped | VCC(min) | 8.3 | 8.9 | 9.5 | V | 5 | |
| Hysteresis VccON-Vcc(min) | VCCHYST | 8.4 | 9.25 | V | 5 | ||
| VDRV pin level at VCC close to VCC(min) | VDRVlow | 8 | V | 33-k resistor to GND | 5 | ||
| DRV pin level at VCC=VOVP-0.2 V | VDRVhigh | 10 | 12 | 14 | V | DRV unloaded | 5 |
| Maximum internal current setpoint | VLimit | 0.744 | 0.8 | 0.856 | V | no OPP | 5 |
| Propagation delay current detection to gate off | TDEL | 40 | 60 | ns | 5 | ||
| OPP current | IOPP3 | 170 | 185 | 210 | µA | Voltage on pin 3 = 2.65 V AND VFB > VfoldF | 5 |
| Internal OTA for OPP current generation | OPPgm | 103 | 115 | 125 | µS | 5 | |
| Oscillation frequency 65 kHz version | fOSC,nom | 61 | 65 | 70 | kHz | 65 kHz version | 6 |
| Maximum duty ratio | Dmax | 77 | 80 | 83 | % | 6 | |
| Equivalent ac resistance from FB to gnd | Req | 19 | 23 | 26 | kΩ | 6 | |
| Minimum operating frequency | Ftrans | 22 | 26 | 30 | kHz | 6 | |
| Latching level, brown-out input | Vlatch1 | 4.3 | 4.5 | 4.7 | V | 6 | |
| Latching level, current sense input, off time only | Vlatch2 | 1.45 | 1.5 | 1.55 | V | 6 | |
| Internal auto-recovery fault timer duration | Timer | 50 | 70 | 90 | ms | 6 | |
| Latched over voltage protection on the Vcc rail | VOVP | 25.3 | 26 | 26.8 | V | 6 | |
| Brown-out turn-on voltage | VBOon | 0.76 | 0.8 | 0.87 | V | 6 | |
| Brown-out turn-off voltage | VBOoff | 0.66 | 0.7 | 0.74 | V | 6 | |
| Active Zener diode clamping BO signal | DZBO | 3.1 | 3.3 | 3.5 | V | all versions except E | 6 |
| Frequency jittering | fjitter | 5 | % | ± of fOSC | 6 | ||
| Output rise-time | Tr | 40 | ns | CL = 1 nF, 10-90% | 5 | ||
| Output fall-time | Tf | 30 | ns | CL = 1 nF, 10-90% | 5 |
CAD (KiCad official)
- Symbol:
NCP1256ASN65T1G - Footprint:
Package_SO:TSOP-6_1.65x3.05mm_P0.95mm - 3D model: TSOP-6 (KiCad packages3D, STEP)
- 3D model files:
ncp1256asn65t1g-etched.step/ncp1256asn65t1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ncp1256asn65t1g.step/ncp1256asn65t1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (25 pp, sha256
04379d7936cf178f, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).