component
STCMB1TR
Public Made by Adomby adom
STMicroelectronics AC-DC Controllers & Regulators, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"subcategory": "AC-DC Controllers & Regulators",
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"pins": [
{
"number": "1",
"name": "HV",
"type": "input",
"description": "800 V-rated high-voltage start-up generator and ac sensing input, connected to the ac side of the bridge via two diodes and a mandatory 3 k to 9 k series resistor; it also supplies X-capacitor discharge."
},
{
"number": "2",
"name": "N.C.",
"type": "unconnected",
"description": "Not internally connected; high-voltage spacer for creepage distance."
},
{
"number": "3",
"name": "FB",
"type": "input",
"description": "PFC output voltage feedback with 2.5 V reference, 7% overvoltage stop, latch-off below 0.5 V, HB enabled above 2.4 V and inhibited below 1.75 V (dc brown-out)."
},
{
"number": "4",
"name": "COMP",
"type": "output",
"description": "PFC error amplifier output; the PFC gate driver is inhibited (burst mode) when the voltage falls below 1 V (typ.)."
},
{
"number": "5",
"name": "TON",
"type": "passive",
"description": "Sets PFC MOSFET maximum on-time via a parallel resistor and capacitor to ground, generating a ramp compared with COMP."
},
{
"number": "6",
"name": "ZCD",
"type": "input",
"description": "Boost inductor demagnetization sensing input; a negative-going edge triggers PFC MOSFET turn-on (absolute maximum 3 mA)."
},
{
"number": "7",
"name": "CF",
"type": "passive",
"description": "Timing capacitor for the HB oscillator, connected to GND and charged by the current set at RFMIN."
},
{
"number": "8",
"name": "CSS",
"type": "passive",
"description": "HB soft-start capacitor to GND with resistor to RFMIN; burst mode and second-level OCP are inhibited while below 0.3 V."
},
{
"number": "9",
"name": "RFMIN",
"type": "output",
"description": "Accurate 2 V reference; resistor to GND sets the maximum timeshift and optocoupler phototransistor sets the minimum (max source current 2 mA)."
},
{
"number": "10",
"name": "STBY",
"type": "input",
"description": "HB burst mode threshold input with 1.25 V reference and 40 mV restart hysteresis; requires RC filter with R > 100 ohm and C > 100 pF; tie to RFMIN if unused."
},
{
"number": "11",
"name": "ISEN_PFC",
"type": "input",
"description": "PFC inductor current sense input with -25 mV PWM start threshold and -0.5 V overcurrent threshold; requires RC filter with R > 100 ohm and C > 100 pF."
},
{
"number": "12",
"name": "ISEN_HB",
"type": "input",
"description": "HB resonant current sense input with 0.8 V soft-start discharge threshold and 1.5 V immediate shutdown threshold; RC filter R > 50 ohm, C > 100 pF recommended; do not short to ground."
},
{
"number": "13",
"name": "GND",
"type": "power_in",
"description": "Ground return for signal circuits, the PFC gate driver and the HB low-side gate driver."
},
{
"number": "14",
"name": "GD_PFC",
"type": "output",
"description": "PFC gate driver totem pole output with 0.6 A source and 0.8 A sink minimum, actively pulled to GND during UVLO."
},
{
"number": "15",
"name": "VCC",
"type": "power_in",
"description": "Signal part supply, operating range 10 to 20 V, requiring at least 22 uF electrolytic capacitor to GND (absolute maximum 21 V)."
},
{
"number": "16",
"name": "LVG",
"type": "output",
"description": "HB low-side gate drive output with 0.3 A source and 0.8 A sink minimum, actively pulled to GND during UVLO."
},
{
"number": "17",
"name": "N.C.",
"type": "unconnected",
"description": "Not internally connected; high-voltage spacer for creepage distance."
},
{
"number": "18",
"name": "OUT",
"type": "passive",
"description": "High-side gate drive floating ground and current return for the high-side gate drive current."
},
{
"number": "19",
"name": "HVG",
"type": "output",
"description": "HB high-side gate drive output with 0.3 A source and 0.8 A sink minimum, with internal resistor to OUT during UVLO."
},
{
"number": "20",
"name": "BOOT",
"type": "power_in",
"description": "High-side gate drive floating supply, bootstrap capacitor to OUT fed by internal synchronous bootstrap diode (absolute maximum 620 V)."
}
],
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],
"pages_sent": 12,
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"at": "2026-10-22T22:21:30"
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"Package": "SOIC-20-300mil",
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"name": "Operating range VCC",
"symbol": "VVCC",
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"conditions": "After turn-on",
"source_page": 11,
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"name": "Quiescent current after turn-on",
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"unit": "mA",
"min": null,
"typ": 3,
"max": 4,
"conditions": "VFB = 2.5 V",
"source_page": 11,
"source": "datasheet"
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"name": "Idle quiescent current during burst mode",
"symbol": "Iq",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.7,
"max": 0.94,
"conditions": "Tj = 25 °C",
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{
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{
"name": "Operating supply current",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 2.8,
"max": 3.6,
"conditions": "fsw = 75 kHz, VFB = 1 V, GD_PFC only",
"source_page": 11,
"source": "datasheet"
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{
"name": "Operating supply current",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 4.5,
"max": 6,
"conditions": "fsw = 75 kHz, VFB = 2.5 V, all drivers",
"source_page": 11,
"source": "datasheet"
},
{
"name": "HV breakdown voltage",
"symbol": "VHV",
"kind": "electrical",
"unit": "V",
"min": 800,
"typ": null,
"max": null,
"conditions": "IHV < 100 µA",
"source_page": 11,
"source": "datasheet"
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{
"name": "HV start voltage (rising)",
"symbol": "VHVstart",
"kind": "electrical",
"unit": "V",
"min": 10,
"typ": 18,
"max": 25,
"conditions": "IVCC < 100 µA",
"source_page": 11,
"source": "datasheet"
},
{
"name": "VCC switchover threshold",
"symbol": "VVCC_SO",
"kind": "electrical",
"unit": "V",
"min": 1,
"typ": 1.5,
"max": 2,
"conditions": "",
"source_page": 11,
"source": "datasheet"
},
{
"name": "HV ON-state charge current",
"symbol": "IHV, ON",
"kind": "electrical",
"unit": "mA",
"min": 0.5,
"typ": 1,
"max": 1.6,
"conditions": "VHV > VHVstart, VVCC < VVCC_SO",
"source_page": 11,
"source": "datasheet"
},
{
"name": "HV ON-state charge current",
"symbol": "IHV, ON",
"kind": "electrical",
"unit": "mA",
"min": 5,
"typ": 8,
"max": 11,
"conditions": "VHV > VHVstart, VVCC > VVCC_SO",
"source_page": 11,
"source": "datasheet"
},
{
"name": "HV ON-state charge current",
"symbol": "IHV, ON",
"kind": "electrical",
"unit": "mA",
"min": 3.5,
"typ": 4.5,
"max": 5.5,
"conditions": "IC latched off or restart after overload timeout",
"source_page": 11,
"source": "datasheet"
},
{
"name": "HV off-state leakage current",
"symbol": "IHV, OFF",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 20,
"max": 24,
"conditions": "VHV = 400 V",
"source_page": 11,
"source": "datasheet"
},
{
"name": "Generator shutdown timeout",
"symbol": "TTOUT",
"kind": "timing",
"unit": "ms",
"min": 64,
"typ": 80,
"max": 96,
"conditions": "After VVCC exceeds VVCCOn",
"source_page": 11,
"source": "datasheet"
},
{
"name": "X-cap peak residual voltage",
"symbol": "VHVmin",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 45,
"conditions": "IHV, DIS > 4.2 mA",
"source_page": 11,
"source": "datasheet"
},
{
"name": "X-cap discharge current",
"symbol": "IHV, DIS",
"kind": "electrical",
"unit": "mA",
"min": 4.2,
"typ": null,
"max": null,
"conditions": "VHV > 45 V",
"source_page": 11,
"source": "datasheet"
},
{
"name": "Brown-out threshold",
"symbol": "VHVpk_BO",
"kind": "electrical",
"unit": "V",
"min": 92,
"typ": 98,
"max": 104,
"conditions": "Peak voltage falling; LLC in continuous switching, no burst mode, RHV series = 5.6 K",
"source_page": 12,
"source": "datasheet"
},
{
"name": "Brown-in threshold",
"symbol": "VHVpk_BI",
"kind": "electrical",
"unit": "V",
"min": 106,
"typ": 113,
"max": 120,
"conditions": "Peak voltage rising; LLC in continuous switching, no burst mode, RHV series = 5.6 K",
"source_page": 12,
"source": "datasheet"
},
{
"name": "Brown-out debounce time",
"symbol": "TDB",
"kind": "timing",
"unit": "ms",
"min": 32,
"typ": 40,
"max": 48,
"conditions": "",
"source_page": 12,
"source": "datasheet"
},
{
"name": "ZCD upper clamp voltage",
"symbol": "VZCDH",
"kind": "electrical",
"unit": "V",
"min": 2.8,
"typ": 3.3,
"max": null,
"conditions": "IZCD = 2.5 mA",
"source_page": 12,
"source": "datasheet"
},
{
"name": "ZCD lower clamp voltage",
"symbol": "VZCDL",
"kind": "electrical",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 0,
"conditions": "IZCD = -2.5 mA",
"source_page": 12,
"source": "datasheet"
},
{
"name": "ZCD input bias current",
"symbol": "IZCDb",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 5,
"conditions": "VZCD = 1 to 2.2 V",
"source_page": 12,
"source": "datasheet"
},
{
"name": "TON charge current",
"symbol": "ITON",
"kind": "electrical",
"unit": "µA",
"min": 180,
"typ": 200,
"max": 220,
"conditions": "VTON = 3 V, VHV_pk = 160 V dc",
"source_page": 12,
"source": "datasheet"
},
{
"name": "TON charge current",
"symbol": "ITON",
"kind": "electrical",
"unit": "µA",
"min": 640,
"typ": 800,
"max": 960,
"conditions": "VTON = 3 V, VHV_pk = 320 V dc",
"source_page": 12,
"source": "datasheet"
},
{
"name": "TON linear operating range",
"symbol": "VTON",
"kind": "electrical",
"unit": "V",
"min": 0,
"typ": null,
"max": 3,
"conditions": "",
"source_page": 12,
"source": "datasheet"
},
{
"name": "TON discharge resistance",
"symbol": "RDSC",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 60,
"max": 200,
"conditions": "",
"source_page": 12,
"source": "datasheet"
},
{
"name": "Internal voltage reference",
"symbol": "Vref",
"kind": "electrical",
"unit": "V",
"min": 2.475,
"typ": 2.5,
"max": 2.525,
"conditions": "Tj = 25 °C",
"source_page": 12,
"source": "datasheet"
},
{
"name": "Internal voltage reference",
"symbol": "Vref",
"kind": "electrical",
"unit": "V",
"min": 2.44,
"typ": null,
"max": 2.58,
"conditions": "10 V < VVCC < 21 V",
"source_page": 12,
"source": "datasheet"
},
{
"name": "Error amp input bias current",
"symbol": "IFB",
"kind": "electrical",
"unit": "µA",
"min": -1,
"typ": -0.2,
"max": 1,
"conditions": "VFB = 0 to 3 V",
"source_page": 12,
"source": "datasheet"
},
{
"name": "COMP upper clamp voltage",
"symbol": "VCOMPSAT",
"kind": "electrical",
"unit": "V",
"min": 4,
"typ": 4.3,
"max": null,
"conditions": "ISOURCE = 20 µA",
"source_page": 12,
"source": "datasheet"
},
{
"name": "Max. sink/source current",
"symbol": "ICOMP",
"kind": "electrical",
"unit": "µA",
"min": 150,
"typ": 200,
"max": null,
"conditions": "VCOMP = 3 V, VFB = 2.3 V",
"source_page": 12,
"source": "datasheet"
},
{
"name": "Transconductance",
"symbol": "gm",
"kind": "electrical",
"unit": "µS",
"min": 160,
"typ": 200,
"max": 240,
"conditions": "VFB = Vref",
"source_page": 12,
"source": "datasheet"
},
{
"name": "D_OVP threshold",
"symbol": "VFB_S",
"kind": "electrical",
"unit": "V",
"min": 2.595,
"typ": 2.675,
"max": 2.755,
"conditions": "Tj = 25 °C",
"source_page": 12,
"source": "datasheet"
},
{
"name": "D_OVP threshold",
"symbol": "VFB_S",
"kind": "electrical",
"unit": "V",
"min": 2.568,
"typ": null,
"max": 2.782,
"conditions": "10 V < VVCC < 21 V",
"source_page": 12,
"source": "datasheet"
},
{
"name": "Restart voltage after D_OVP",
"symbol": "VFB_R",
"kind": "electrical",
"unit": "V",
"min": 2.47,
"typ": 2.55,
"max": 2.63,
"conditions": "",
"source_page": 12,
"source": "datasheet"
},
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