company blog about Recycle Renesas Load Switches:Power Multiplexers,GreenFET Load Switches

Recycle Renesas Load Switches:Power Multiplexers,GreenFET Load Switches

Shenzhen Mingjiada Electronics has specialised in the recycling of electronic component stock for over twenty years. We offer year-round, high-value cash purchases for original, brand-new in-stock electronic components, factory surplus, obsolete stock, project leftovers and genuine chips salvaged from dismantled equipment. We provide a one-stop service with on-site inspection and immediate settlement, helping businesses to liquidate excess stock and quickly recover working capital.

[Recycling Service Details]

Recyclable Categories: Brand-new, factory-sealed products in trays or tubes; loose new items; functional components salvaged from dismantled equipment; components on boards; factory end-of-line stock; and customs inventory. We do not accept refurbished, sanded-down, or substandard damaged components from dismantled equipment.

Payment Terms: Cash on delivery; settlement within seconds upon receipt of goods. No delayed payments, no deductions, and no hidden depreciation or price reductions.

【Core Advantages of Our Buyback Service】

Competitive Pricing: Leveraging global distribution channels, we set prices in line with spot market rates, offering higher quotes for identical models than standard market buyback operators;

Reliable Credentials: A physical company with on-site warehousing and years of experience in chip trading, enabling precise differentiation and pricing based on model, batch and quality;

Compliant Disposal: Environmentally compliant recycling of idle chips, with confidential handling of client inventory information to prevent any leakage of supply sources.

【Renesas Core Product Categories: GreenFET Load Switches & Power Multiplexers】

I. Core Technologies and Features of GreenFET Basic Load Switches

1. Core Process Advantages: In-house developed CuFET power MOSFETs

Extremely low and voltage/temperature-stable on-resistance (Rds(on)), as low as 18 mΩ; minimal resistance fluctuation across a wide voltage range, significantly reducing on-state power consumption;

Ultra-thin, compact packaging with a PCB footprint of just 0.56 mm² to 5.04 mm²; low thermal resistance packaging design supports sustained high-current output without overheating;

Built-in charge pump drives the N-channel MOSFET, enabling full-scale conduction even in low-voltage input scenarios without the need for an external boost circuit.

2. Standardised protection features across the entire series

Adjustable soft-start (surge suppression): An external capacitor sets the output rise slope, preventing large inrush currents at power-up from overloading the power supply or damaging capacitors;

Multi-level overcurrent and short-circuit protection: Features two levels of protection—an active current-limiting threshold and rapid short-circuit shutdown—to distinguish between normal load fluctuations and hardware short circuits;

True reverse current blocking: Completely isolates reverse current flow in the off state, preventing crosstalk in multi-power-supply systems and battery backflow;

Thermal shutdown + automatic recovery: The chip automatically cuts off the channel in the event of overheating and can restart automatically once cooled, preventing damage to the chip and downstream loads;

OVP (Overvoltage Protection) / UVLO (Undervoltage Lockout): High-precision voltage monitoring ensures the power supply is immediately shut down if thresholds are exceeded, protecting sensitive chips;

Optional output fast discharge: Rapidly discharges residual output voltage after shutdown, preventing accidental triggering of peripheral devices and high standby power consumption due to leakage.

3. Product Classification (Channel Configuration)

Single-channel load switch: Single high-side power supply switching, available in N-channel and P-channel variants. A typical model is the SLG59M1721V (2A, 18mΩ), used for controlling single-rail power supplies for independent peripherals;

Dual-channel independent load switch: Two fully independent control channels in a single package, capable of switching two sets of power rails without mutual interference, simplifying power distribution layouts for multiple peripherals;

High-voltage GreenFET switches: With a maximum withstand voltage of 25.2V, these are suitable for powering 12V/24V industrial and automotive peripheral applications.

4. Typical Application Scenarios

Portable devices: Modular power disconnection for tablets, hard drives, TWS charging cases and handheld instruments to reduce static standby power consumption;

Single-board computers / gateways: Time-division power-up and sequencing control for multi-core voltage rails such as 3.3V, 1.8V and 1.1V;

Independent switching of power supplies for USB ports, wireless modules and sensors;

Power supply activation/deactivation and hot-swap protection for industrial I/O and small servo peripherals.

II. GreenFET Power Multiplexer

1. Product Definition and Architecture

The power multiplexer is a dual-channel, shared-output GreenFET that integrates two independent load switches, dual charge pumps and state machine logic. It supports two input power sources and a single shared output, enabling automatic or manual switching between dual power sources such as battery/adapter and USB/wireless charging. Key representative models include: SLG59H1401C (2.8–6V, dual 3A channels) and SLG59H1405V (5V/12V with two channels of different current ratings).

2. Key Differentiating Features (Not Found in Standard Load Switches)

Dual-Power-Supply Intelligent Switching Logic

Automatic Priority Mode: Hardware-configurable priority settings for the two power supplies; when a higher-priority power supply is connected, the lower-priority one is automatically disconnected, prioritising the adapter and using the battery as a backup;

MCU Manual Control Mode: External logic pins directly select the active channel, enabling software-controllable redundant power supply systems;

OR Mode: Both power sources are output in parallel simultaneously, suitable for power redundancy and high-current parallel power supply scenarios.

Seamless, Interruption-Free Switching: A built-in state machine controls the switching sequence; the switching process involves no output voltage drop, and the system does not reset or experience downtime;

Channel status feedback pin (ST): Outputs the signal of the currently active channel in real time, allowing the MCU to monitor the power source and perform battery level and charging logic assessments;

Incorporates the full suite of GreenFET protection features: bidirectional reverse blocking, adjustable soft-start, multi-stage current limiting, high-precision OVP (accuracy ±5%), thermal shutdown and undervoltage latch; the two channels are independently protected without mutual interference.

3. Typical Application Scenarios

Consumer and portable devices: Laptops, Bluetooth charging cases, handheld terminals; automatic switching between battery and USB charging adapters;

Industrial IoT gateways: Dual-path redundant power supply (main power + backup battery); seamless switching during power outages to ensure uninterrupted data transmission;

Communication equipment, printers and photocopiers: Multi-input power supply selection;

In-vehicle peripherals: switching between the vehicle’s 12V auxiliary power supply and a backup battery;

Test and measurement equipment: automatic selection of output from multiple DC power sources.