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1,000 pcs
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1000 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The NCP1937B1DR2G from ON Semiconductor is an integrated circuit designed for compact and highly efficient Switched Mode Power Supplies (SMPS) in adapter applications. This device combines Power Factor Correction (PFC) and quasi-resonant flyback functionality.
The PFC stage operates in Critical Conduction Mode (CrM) with a maximum frequency clamp, aiming for near-unity power factor. The quasi-resonant current-mode flyback stage incorporates proprietary valley-lockout circuitry for stable valley switching and frequency foldback to minimize audible noise. Skip mode operation enhances efficiency at light loads.
Key general features include a wide VCC range from 9 V to 30 V with built-in overvoltage protection, high-voltage startup, and active input filter capacitor discharge for reduced standby power. It also includes an integrated high-voltage brown-out detector and a fault input compatible with NTCs, offering latch and auto-recovery options.
This controller is supplied in a 20-SOIC package and is suitable for surface mount applications. It operates across a temperature range of -40°C to 125°C.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.75 | $0.75 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
9V to 30V.
-40°C to 125°C.
20-SOIC (20-LSOP, 0.154" width, 3.90mm) with 17 leads.
Critical Conduction Mode (CRM).
20 mA.
Surface Mount.