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NCP1234AD65R2G

Public Made by Adom

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onsemi AC-DC Controllers & Regulators, SOIC-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower supply chipncp1234ad65r2gfactory-2.0.0extractor-text
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Contents

README

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NCP1234AD65R2G

onsemi · AC-DC Controllers & Regulators · SOIC-7

NCP1234AD65R2G from onsemi, in a SOIC-7. 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 LATCH input Latch-off input: pull the pin up or down to latch off the controller; an internal current source allows direct connection of an NTC for over temperature detection.
2 FB input Feedback input: an optocoupler collector to ground controls the output regulation.
3 CS input Current sense input: senses the primary current for current-mode operation and offers an overpower compensation adjustment.
4 GND power_in IC ground.
5 DRV output Drive output that drives the external MOSFET (±500 mA peak source/sink capability).
6 VCC power_in VCC supply input accepting up to 28 Vdc, with overvoltage detection.
8 HV passive High-voltage pin connecting to the bulk capacitor or rectified AC line to perform the functions of start-up current source and Dynamic Self-Supply.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOIC-7
Category Power Supply Chip
Pins 7

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply pin voltage range VCCMAX -0.3 28 V Pin 6 4
Supply pin current range ICCMAX -30 30 mA Pin 6 4
HV pin voltage range VHVMAX -0.3 500 V Pin 8 4
HV pin current range IHVMAX -20 20 mA Pin 8 4
Driver pin voltage range VDRVMAX -0.3 20 V Pin 5 4
Driver pin current range IDRVMAX -1000 1000 mA Pin 5 4
All other pins voltage range VMAX -0.3 10 V All other pins 4
All other pins current range IMAX -10 10 mA All other pins 4
Operating junction temperature TJMAX -40 150 °C 4
Storage temperature range TSTRGMAX -60 150 °C 4
ESD Human Body Model 2000 V All pins except HV 4
Thermal resistance junction-to-air, low conductivity PCB RθJ-A 162 °C/W SOIC-7, 50 mm2 copper 4
Thermal resistance junction-to-air, medium conductivity PCB RθJ-A 147 °C/W SOIC-7, 100 mm2 copper 4
Thermal resistance junction-to-air, high conductivity PCB RθJ-A 115 °C/W SOIC-7, 650 mm2 copper 4
Minimum voltage for current source operation VHV(min) 30 40 V 5
HV current source output current Istart1 0.2 0.5 0.8 mA VCC = 0 V 5
HV current source output current Istart2 3 6 9 mA VCC = VCC(on) − 0.5 V 5
Off-state leakage current Istart(off) 25 50 µA VHV = 500 V 5
Turn-on threshold level, VCC going up VCC(on) 11 12 13 V 5
HV current source restart threshold VCC(min) 9.5 10.5 11.5 V 5
Turn-off threshold VCC(off) 8.5 9.5 10.5 V 5
Overvoltage threshold VCC(ovp) 25 26.5 28 V 5
Blanking duration on VCC(off) and VCC(ovp) detection tVCC(blank) 7 10 13 µs 5
VCC level at which internal logic resets VCC(reset) 3.6 5 6 V VCC decreasing 5
Internal current consumption ICC1 1.2 1.8 2.2 mA DRV open, VFB = 3 V, 65 kHz 5
Internal current consumption ICC2 1.9 2.5 3.2 mA Cdrv = 1 nF, VFB = 3 V, 65 kHz 5
Internal current consumption, off mode ICC3 0.67 0.9 1.13 mA Off mode (skip or before start-up) 5
Internal current consumption, fault mode ICC4 0.4 0.7 1 mA Fault mode (fault or latch) 5
Oscillator frequency fOSC 60 65 70 kHz 65 kHz version 5
Maximum duty cycle DMAX 75 80 85 % 5
Driver rise time trise 40 70 ns VCC = VCC(min) + 0.2 V, CDRV = 1 nF, 10% to 90% of VCC 5
Driver fall time tfall 40 70 ns VCC = VCC(min) + 0.2 V, CDRV = 1 nF, 90% to 10% of VCC 5
Driver clamping voltage VDRV(clamp) 11 13.5 16 V VCC = VCCmax − 0.2 V, DRV high, RDRV = 33 k, Cload = 220 pF 5
Driver high-state voltage drop VDRV(drop) 1 V VCC = VCC(min) + 0.2 V, RDRV = 33 k, DRV high 5
Internal pull-up resistor RFB(up) 15 20 25 kΩ TJ = 25°C 6
VFB to internal current setpoint division ratio KFB 4.7 5 5.3 6
Internal pull-up voltage on FB pin VFB(ref) 4.3 5 5.7 V 6
Maximum internal current setpoint VILIM 0.66 0.7 0.74 V VFB > 3.5 V 6
Propagation delay from VIlimit detection to DRV off tdelay 80 110 ns VCS = VILIM 6
Leading edge blanking duration for VILIM tLEB 190 250 310 ns 6
Threshold for immediate fault protection activation VCS(stop) 0.95 1.05 1.15 V 6
Soft-start duration tSSTART 2.8 4 5.2 ms From 1st pulse to VCS = VILIM 6
Current flowing out of CS pin IOPC(365) 105 130 150 µA VHV = 365 V 6
FB voltage above which IOPC is applied VFB(OPCF) 2.12 2.35 2.58 V VHV = 365 V 6
Fault timer duration tfault 98 128 168 ms From CS reaching VILIMIT to DRV stop 6
FB threshold below which frequency foldback starts VFB(foldS) 1.8 2 2.2 V 6
FB threshold below which frequency foldback is complete VFB(foldE) 1.22 1.35 1.48 V 6
Minimum switching frequency fOSC(min) 22 27 32 kHz VFB = Vskip(in) + 0.2 6
Skip mode FB threshold going down Vskip(in) 0.63 0.7 0.77 V VFB going down 6
Skip mode FB threshold going up Vskip(out) 0.72 0.8 0.88 V VFB going up 6
Latch high threshold VOVP 2.35 2.5 2.65 V VLatch going up 7
Latch low threshold VOTP 0.76 0.8 0.84 V VLatch going down 7
Current source for direct NTC connection INTC 65 95 105 µA During normal operation 7
Current source for direct NTC connection during soft-start INTC(SSTART) 130 190 210 µA During soft-start, VLatch = 0 V 7
Blanking duration on high latch detection tLatch(OVP) 35 50 70 µs 65 kHz version 7
Latch clamping voltage Vclamp0(Latch) 1 1.2 1.4 V ILatch = 0 mA 7
Latch clamping voltage Vclamp1(Latch) 2 2.4 3 V ILatch = 1 mA 7
Temperature shutdown TTSD 135 150 165 °C TJ going up 7
Temperature shutdown hysteresis TTSD(HYS) 20 30 40 °C TJ going down 7

CAD (KiCad official)

  • Symbol: NCP1234AD65R2G
  • Footprint: Package_SO:SOIC-8-N7_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-7 (KiCad packages3D, STEP)
  • 3D model files: ncp1234ad65r2g-etched.step / ncp1234ad65r2g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncp1234ad65r2g.step / ncp1234ad65r2g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (35 pp, sha256 747cd99308191042, retrieved 2026-10-22, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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