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NCP1937B1DR2G

Name: NCP1937B1DR2G
Rating: 4.7 (12 reviews)

IC PFC CTRLR CRM 20SOIC

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製造商。部分 #NCP1937B1DR2G
包 SOIC-20 NB
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規格

Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Active
Mode	Critical Conduction (CRM)
Current-Startup	20 mA
Voltage-Supply	9V ~ 30V
OperatingTemperature	-40°C ~ 125°C
MountingType	Surface Mount
Package/Case	20-LSOP (0.154, 3.90mm Width), 17 Leads

概述

Description

NCP1937B1DR2G is an ON Semiconductor high‑voltage PWM controller IC used to regulate switching‑mode power supplies (SMPS) and similar input‑to‑output converters. It provides current‑mode control and built‑in protections (e.g., overcurrent/short‑circuit, undervoltage lockout, and thermal shutdown) with an enable input for easy control. The B1 revision indicates a particular version/threshold tuning, and DR2G denotes its 8‑pin package variant. Typical applications include offline AC‑DC adapters, DC‑DC converters, and LED driver regulators. For exact electrical specs, pinout, soft‑start behavior, and application circuits, consult the NCP1937B1DR2G datasheet and the On Semiconductor website.

Features

Key features of NCP1937B1DR2G (On Semiconductor) in brief:
- Off-line high-voltage PWM controller for SMPS with primary-side regulation
- Built-in high-voltage startup device and current-sense capability
- Current-mode PWM control with slope compensation
- Protection: overcurrent/short-circuit (latch or hiccup), overvoltage, and thermal shutdown
- Undervoltage lockout and enable input for controlled startup
- Soft-start to limit inrush and output overshoot
- Burst/eco mode for improved standby efficiency at light loads
- Wide operating temperature range and robust ESD/EMI handling
- Compact DR2G package suitable for small power adapters
Note: For exact electrical specs (voltage ranges, current limits, switching frequency), please consult the datasheet.

Package

NCP1937B1DR2G uses an 8-pin DFN package with a 2×3 mm footprint (RoHS-compliant).

Pinout

- Pin count: 8 pins (DR2G package)
- Function: High-voltage, current-mode PWM controller for switch‑mode power supplies (e.g., flyback converters). Performs regulation via feedback and current sensing, with protections (UVLO, overcurrent/short, etc.). Typically used with an external MOSFET.

Manufacturer

Manufacturer: ON Semiconductor (ON Semiconductor Corp).
Company type: An American multinational semiconductor company that designs, manufactures, and sells energy-efficient ICs and power-management solutions.

Application

- High-efficiency buck regulator controller for DC-DC converters
- Portable and battery-powered devices
- Automotive and industrial power supplies
- Telecom, networking equipment, and consumer electronics/computer peripherals