Year: 2025

BenQ RL2240H Gaming Monitor – 21.5 inch

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BenQ RL2240H is a 21.5-inch LED backlit LCD monitor that uses a TN panel with native 1920×1080 resolution and a 16:9 aspect ratio. It supports multiple inputs including VGA, DVI, and HDMI, and offers fast response characteristics (~2 ms gray-to-gray) and gaming-oriented enhancements. This monitor is often deployed for esports, RTS gaming, or general desktop use where fast response and clear visuals are needed.

Function: 21.5-inch LED Gaming Monitor

Manufacturer: BenQ Corporation

Status : Discontinued

Image:
BenQ RL2240H

Description

The RL2240H is a professional gaming monitor suited for RTS game play. This 21.5″ LED backlight monitor is packed with the latest features: Gaming-comfort Flicker-free Technology, Black eQualizer, RTS mode, Display mode, Smart Scaling, 1ms GTG, HDMI and 12M:1 dynamic contrast ratio.

Features

  • 21.5-inch TN LED panel, Full HD (1920×1080)
  • Brightness: 250 cd/m² (typical), Static contrast ratio: 1000:1
  • Dynamic contrast ratio up to 12,000,000:1
  • Fast response time: 5 ms typical, 2 ms (GtG) variant
  • Viewing angles: 170° horizontal / 160° vertical
  • Inputs: VGA (D-Sub), DVI, HDMI
  • Gaming modes: RTS mode presets, Black eQualizer, Smart Scaling
  • Flicker-free (ZeroFlicker) technology to reduce eye strain
  • Tilt adjustment: –5° to +20°

Applications

  • RTS / esports gaming where fast response is important
  • General desktop computing / office usage
  • Secondary display or multi-monitor setups
  • Media playback and video viewing at Full HD resolutions
  • Lightweight gaming rigs or LAN station setups

Alternative / Equivalent Products

  • BenQ RL2240HE (variant with 1 ms response, similar feature set)
  • BenQ Zowie XL2411 / XL2411K (gaming-oriented 24″ TN monitors)
  • AOC G2260VWQ6 (gaming 21.5″ monitor with higher refresh options)
  • ASUS VG228HE (22″ Full HD gaming monitor)
  • Acer GN246HL (24″ eSports monitor, though larger, in the same performance class)

STR-A6251 Datasheet – Flyback Switching Regulator

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Part Number: STR-A6251

Function: PWM-topology off-line secondary-feedback switching regulator IC

Package: DIP 8 Pin Type

Manufacturer: Allegro MicroSystems, Sanken

Images:

STR-A6251 datasheet

 

Description

The STR-A6251 and STR-A6252 are 50 kHz PWM topology (with ±5% frequency jittering for minimum EMI) regulators specifically designed to satisfy the requirements for increased integration and reliability in flyback converters. They incorporate a primary control and drive circuit with avalanche-rated power MOSFETs.

The STR-A6252 features higher allowable switching current and lower on-resistance.
The STRA6251 is also available for 67 kHz operation. Covering the power range from below 21 watts or 24 watts for a 230 VAC input, or to 15 or 20 watts for a universal (85 to 264 VAC) input, these devices can be used in a wide range of applications, from DVD players and VCR player/recorders to ac adapters for cellular phones and digital cameras. An auto-burst standby function reduces power consumption at light load, while multiple protections, including the avalanche-energy guaranteed MOSFET, provide high reliability of system design.

Pinouts

STR-A6251 pinout

 

 

Features

1. Start-up circuit

Thanks to the proprietary 900V BCD process, the built-in startup circuit connected to the internal MOSFET drain reduces both the discrete component count and the power consumption.

2. PWM operational frequency jittering

The frequency jittering function suppresses EMI noise and consequently reduces the EMI noise filter cost The center frequency of PWM operation is set to 50 KHz, and the frequency jittering provides variation of Δf= 5KHz (typ), which is adjustable by the external capacitor.

3. Over Load Protection (OLP) with a built-in timer (Auto restart)

Built-in delay timer circuit to trip the overload protection requires no external OLP capacitor, which allows cost reduction and space-saving.

Preview

STR-A6251 pinout datasheet

 

Applications

1.Standby power supply

2.Battery charger

3.Small power S.M.P.S

STR-A6251 Datasheet PDF

STR-A6251 pdf