component
viper27hn
Public Made by Adomby adom
STMicroelectronics AC-DC Controllers and Regulators, DIP-7. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownVIPER27HN
STMicroelectronics · AC-DC Controllers and Regulators · DIP-7
VIPER27HN from STMicroelectronics, in a DIP-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 | GND | power_in | Device ground and source of the internal high-voltage power MOSFET. Return for the VDD supply and reference for CONT, FB and BR. |
| 2 | VDD | power_in | Supply voltage of the low-voltage control section (typ. UVLO on ~14.5 V, off ~8 V). Also provides the charging current to the external VDD capacitor during start-up via the internal high-voltage start-up generator taken from DRAIN. |
| 3 | CONT | input | Multifunction control pin: (1) programs the cycle-by-cycle current-limit set point of the power MOSFET by tying an external resistor to GND, reducing the internal default IDlim; (2) monitors an auxiliary/output voltage - when the voltage exceeds the VOVP threshold the IC is shut down (strobed and digitally filtered for noise immunity). Tie to ground if unused. |
| 4 | FB | input | Feedback input for duty-cycle (PWM) control. An internal current generator biases the loop; a voltage below VFBbm activates burst-mode operation for very light loads, and a voltage close to VFBlin corresponds to reaching the cycle-by-cycle over-current set point. VFB absolute range -0.3 to 5.5 V. |
| 5 | BR | input | Brown-out protection input with hysteresis. A voltage below VBRth (non-latched) shuts down the device and lowers consumption; operation restarts once the pin exceeds VBRth + VBRhyst. Bias current IBR ≈ 0.5 mA max. Tie to GND when the function is not used. |
| 7 | DRAIN | power_in | High-voltage drain of the internal 800 V avalanche-rugged power MOSFET. Also sources the built-in high-voltage switched start-up bias current for VDD. Pins are connected to the metal lead-frame to help heat dissipation - copper heatsink area should be placed under the DRAIN pins. |
| 8 | DRAIN | power_in | Second high-voltage drain lead of the internal 800 V power MOSFET; internally tied to pin 7. Used together with pin 7 for current handling and thermal dissipation through the lead-frame. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DIP-7 |
| Category | PMIC |
| Pins | 7 |
Ordering variants
VIPER27HNVIPER27LNVIPER27HNVIPER27HNVIPER27HDVIPER27HNVIPER27LDVIPER27HNVIPER27HDTRVIPER27HNVIPER27LDTR
CAD (KiCad official)
- Symbol:
VIPER27HN - Footprint:
Package_DIP:DIP-8-N6_W7.62mm - 3D model: DIP-7 (KiCad packages3D, STEP)
- 3D model files:
viper27hn-etched.step/viper27hn-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);viper27hn.step/viper27hn.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (None pp, sha256
8bc782793284a1c9, retrieved 2026-08-17, tier: lcsc) - 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).
Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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