component
SY5955FFP
Public Made by Adomby adom
Silergy Corp AC-DC Controllers & Regulators, SOP-16. 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
markdownSY5955FFP
Silergy Corp · AC-DC Controllers & Regulators · SOP-16
SY5955FFP from Silergy Corp, in a SOP-16. 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 | GATEH | output | Half bridge controller high side drive pin; absolute maximum is HB-0.3V to HB+15V. |
| 2 | HB | passive | Half bridge controller high side ground pin (half-bridge midpoint); HS-HB is limited to -0.3V to 30V. |
| 3 | HS | power_in | Half bridge controller high side bias supply pin; absolute maximum -0.3V to 650V. |
| 4 | NC | unconnected | Not connected. |
| 5 | VCC | power_in | Bias supply pin; absolute maximum -0.3V to 30V. |
| 6 | ISEN | input | Half bridge controller resonant current sense pin; absolute maximum -1.1V to 1.1V. |
| 7 | VSEN | input | Half bridge controller output voltage sense pin; absolute maximum -0.3V to 3.6V. |
| 8 | FBL | input | Half bridge controller feedback pin; absolute maximum -0.3V to 3.6V. |
| 9 | LNS | input | PFC controller input voltage sense pin; absolute maximum -0.3V to 3.6V. |
| 10 | CS | input | PFC controller input current sense pin; absolute maximum -1.1V to 1.1V. |
| 11 | FBB | input | PFC controller output feedback pin; absolute maximum -0.3V to 3.6V. |
| 12 | GATEB | output | PFC controller gate drive pin; absolute maximum -0.3V to 15V. |
| 13 | GND | power_in | Ground pin. |
| 14 | GATEL | output | Half bridge controller low side drive pin; absolute maximum -0.3V to 15V. |
| 15 | NC | unconnected | Not connected. |
| 16 | HV | input | High voltage start-up pin combined with Boost QR detect function; absolute maximum -0.3V to 650V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Silergy Corp |
| Package | SOP-16 |
| Category | Power Management |
| Pins | 16 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| HV, HS pin voltage | -0.3 | 650 | V | 3 | |||
| HS-HB voltage | -0.3 | 30 | V | 3 | |||
| VCC pin voltage | -0.3 | 30 | V | 3 | |||
| CS pin current | ICS | -10 | 20 | mA | 3 | ||
| CS, ISEN voltage | -1.1 | 1.1 | V | 3 | |||
| FBB, LNS, FBL, VSEN voltage | -0.3 | 3.6 | V | 3 | |||
| GATEB, GATEL voltage | -0.3 | 15 | V | 3 | |||
| Power dissipation SOP16 | 1.02 | W | TA = 25°C | 3 | |||
| Maximum junction temperature | 150 | °C | 3 | ||||
| Lead temperature | 260 | °C | Soldering, 10 sec. | 3 | |||
| Storage temperature range | -65 | 150 | °C | 3 | |||
| Thermal resistance junction-ambient SOP16 | θJA | 122 | ℃/W | 3 | |||
| Thermal resistance junction-case SOP16 | θJC | 11.5 | ℃/W | 3 | |||
| VCC Turn-on Threshold | VVCC_ON | 23 | 24 | 25 | V | VVCC = 15V, TA = 25°C | 4 |
| VCC Turn-off Threshold | VVCC_OFF | 8.5 | 9 | 9.5 | V | VVCC = 15V, TA = 25°C | 4 |
| VCC Low for HV Start Threshold | VVCC_LO | 8.9 | 9.5 | 10 | V | 4 | |
| VCC Short Circuit Protection | VVCC_SCP | 0.3 | 0.7 | 1.3 | V | 4 | |
| VCC Shunt Voltage Protection | VVCC_Shunt | 25.4 | 26 | 27.5 | V | 4 | |
| Quiescent Current | IQ | 1.3 | 1.7 | 2.1 | mA | 4 | |
| Standby Current | ISDY | 380 | 600 | 820 | µA | 4 | |
| Enable Off Current | IENOFF | 270 | µA | 4 | |||
| VCC Max Shunt Current | IShunt | 8 | 12 | 16 | mA | 4 | |
| VCC Fault Restart Timer | TVCC_timeout | 0.69 | 1 | 1.11 | s | 4 | |
| HV Startup Current at VCC SCP | IST_L | 0.36 | 0.5 | 0.6 | mA | 4 | |
| HV Startup Current at Normal State | IST_N | 5.4 | 6 | 6.6 | mA | 4 | |
| QR dV/dt Sense Threshold | VHV_TH | 28 | 40 | 52 | V/µs | 4 | |
| QR Time Out Time | TZCS | 2.3 | 3.3 | 3.9 | µs | 4 | |
| Boost Output Regulation Reference | VFBB_REF | 1.18 | 1.2 | 1.22 | V | 4 | |
| Boost Output UVP Threshold | VFBB_UVP | 175 | 200 | 225 | mV | 20% | 4 |
| Boost Output OVP Threshold | VFBB_OVP | 1.25 | 1.29 | 1.33 | V | 107.5% | 4 |
| Boost Output OVP Threshold | VFBB_OVP | 1.21 | 1.25 | 1.29 | V | Vcompv<Vcompv_D | 4 |
| Boost & LLC Disable Threshold | VFBB_ENB | 2 | 2.3 | 2.5 | V | 4 | |
| LLC Input BO Threshold | VFBB_BO | 700 | 750 | 800 | mV | 4 | |
| LLC Input BI Threshold | VFBB_BI | 880 | 950 | 1000 | mV | 4 | |
| FBB Pin Open Detection Source Current | IFBB_OPEN | 50 | 100 | 200 | nA | 4 | |
| Boost Peak Current Limit | VCS_LIMIT | -735 | -700 | -665 | mV | 4 | |
| Inductor Saturation or Short-circuit Protection Limit | VLS_LIMIT | -895 | -850 | -795 | mV | 5 | |
| Boost Current Sense Resistor Short Circuit Protection Threshold | VCS_RSCP | -65 | -50 | -35 | mV | 5 | |
| Boost Current Sense Resistor Short Circuit Protection Timer | TCS_RSCP | 2.8 | 4 | 5.2 | µs | 5 | |
| Boost Input Brown Out Timer | TPROT_LNS_BO | 44 | 64 | 75 | ms | 5 | |
| Boost Input Brown Out Threshold | VLNS_BO | 370 | 400 | 430 | mV | 5 | |
| Boost Input Brown in Threshold | VLNS_BI | 440 | 470 | 500 | mV | 5 | |
| LNS Pin Open Detection Source Current | ILNS_OPEN | 50 | 100 | 200 | nA | 5 | |
| GATEB Drive Limit Voltage | VGATEB_DRV | 10.2 | 11 | 11.8 | V | 5 | |
| GATEB Drive Voltage within Ton,min.B | VGATEB_TH | 6 | 8 | 10 | V | 5 | |
| GATEB Source Current | ISOURCE_GATEB | -800 | -600 | -400 | mA | VGATEB=8V | 5 |
| GATEB Sink Current | ISINK_GATEB | 0.98 | 1.4 | 1.82 | A | VGATEB=11V | 5 |
| Boost Minimum ON Time | TON_MIN_B | 200 | 300 | 420 | ns | 5 | |
| Boost Maximum ON Time | TON_MAX_B | 20 | 30 | 40 | µs | 5 | |
| Boost Minimum OFF Time | TOFF_MIN_B | 0.75 | 1 | 1.25 | µs | 5 | |
| Boost Maximum OFF Time | TOFF_MAX_B | 21 | 30 | 40 | µs | 5 | |
| Toffmax if CS<-850mV and within TLLC,delay | Toffmax | 70 | 100 | 142 | µs | 5 | |
| Boost Minimum Switching Period | TSW_MIN_B | 2 | 2.9 | 3.8 | µs | 5 | |
| Open Loop Protection Threshold Current | IFBL_200% | 14 | 22 | 29 | µA | 5 | |
| Open Loop Protection Trigger Time | TOLP | 44 | 64 | 75 | ms | 5 | |
| ISEN Zero Current Sense Threshold | -55 | -40 | -30 | mV | Detect as≥0 | 6 | |
| ISEN Zero Current Sense Threshold | 30 | 40 | 55 | mV | Detect as≤0 | 6 | |
| LLC Current Sense Resistor Short Circuit Protection Threshold | VISEN_RSCP | 35 | 50 | 65 | mV | 6 | |
| ISEN Max Current Limit | VISEN_L2 | -700 | 650 | 700 | mV | RGATEB=30k | 6 |
| LLC Output OVP Reference | VVSEN_OVP | 1.42 | 1.5 | 1.54 | V | 6 | |
| Thermal Shut Down Temperature | TSD | 130 | 150 | 170 | ℃ | 7 |
CAD (KiCad official)
- Symbol:
SY5955FFP - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files:
sy5955ffp-etched.step/sy5955ffp-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sy5955ffp.step/sy5955ffp.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Silergy Corp datasheet (21 pp, sha256
53265f8e87ec235b, 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).