Renesas UPD166104GS-E1-AZ

Overview

UPD166104GS-E1-AZ from Renesas Electronics is a dual-channel N-channel low-side intelligent power device designed for automotive injector driving. It integrates overcurrent limitation (1.7 A), overheat protection (150 °C shutdown), dynamic clamping (100 V min.), and low R_DS(on) (64–91 mΩ at 25 °C) in a 20-pin SOP package. Its self-protecting behavior enables robust operation in high-voltage inductive load switching.

For engineers reviewing the UPD166104GS-E1-AZ datasheet, UPD166104GS-E1-AZ pinout, UPD166104GS-E1-AZ application, or UPD166104GS-E1-AZ equivalent, this page delivers verified electrical specs, thermal behavior, channel isolation characteristics, and automotive-grade reliability context - critical for engine control unit (ECU) design and injector driver validation.

Technical Context

The UPD166104GS-E1-AZ implements two independent low-side MOSFET drivers with integrated current-limiting and thermal shutdown circuits. Each channel features dedicated VCC, IN, OUT, and GND terminals, enabling isolated control of inductive loads such as fuel injectors. The dynamic clamping circuit connects internally between drain and gate to suppress flyback voltage spikes up to 100 V.

Input logic thresholds are defined at VIH ≥ 3.0 V and VIL ≤ 1.5 V, compatible with standard 5 V microcontroller outputs. Channel temperature monitoring triggers automatic output shutdown at 150 °C, with autonomous restart upon cooling - no external reset required. Power supply range spans VCC = 5–18 V per channel, supporting wide battery voltage operation in automotive environments.

Key Specifications

Pinout & Package

Package: 20-pin plastic SOP (7.62 mm pitch, 12.7 mm × 7.7 mm body, 1.55 mm height), lead-free Sn-Bi plating, tape-and-reel (2500 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel low-side intelligent power switch applications.

Compared with STGD10NB60KD and TLE7231G, the UPD166104GS-E1-AZ offers integrated protection in a low-side configuration optimized for cost-sensitive, high-reliability injector control - eliminating external components while delivering automotive-grade thermal and overcurrent resilience without digital overhead.

Availability

UPD166104GS-E1-AZ is available at Aetrix Electronics and suitable for automotive engine control units, fuel injection systems, and industrial solenoid drivers requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for UPD166104GS-E1-AZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices for automotive and industrial markets.

The UPD166104GS-E1-AZ belongs to Renesas' legacy intelligent power device family, engineered specifically for automotive injector driver applications where robustness, integration, and qualification to "Special" quality grade are essential.

FAQ

What is the maximum continuous output current rating for UPD166104GS-E1-AZ?

The UPD166104GS-E1-AZ features a self-limiting output current of 1.7 A per channel under overcurrent conditions. This is not a continuous rating but a protective clamp - actual DC current capability depends on thermal design and ambient temperature. At 25 °C ambient on a 50 mm × 50 mm FR4 PCB with 600 mm² copper, continuous current is limited by power dissipation (2.5 W total) and R_DS(on), yielding ~1.4 A sustained per channel before thermal shutdown activates.

Does UPD166104GS-E1-AZ support 24 V automotive systems?

The UPD166104GS-E1-AZ supports VCC up to 18 V continuously and withstands transient voltages up to 35 V for 1 second - making it suitable for 12 V nominal automotive systems. For 24 V systems, external regulation to ≤18 V is required on VCC1/VCC2. Its 100 V dynamic clamp protects against flyback spikes but does not extend the supply voltage rating.

How does the thermal shutdown and auto-restart function work in UPD166104GS-E1-AZ?

The UPD166104GS-E1-AZ monitors channel temperature and shuts down the affected output when it reaches 150 °C. Once the junction cools below the hysteresis threshold (typically ~20 °C below shutdown point), the output automatically resumes operation without external intervention. This behavior is implemented entirely on-die and requires no MCU polling or reset signal - critical for fail-operational injector control.

Can UPD166104GS-E1-AZ drive inductive loads without external clamping diodes?

Yes. The UPD166104GS-E1-AZ includes an integrated dynamic clamping circuit that limits flyback voltage to a minimum of 100 V, eliminating the need for external freewheeling diodes in most injector and solenoid applications. This reduces component count, PCB area, and potential EMI from diode reverse recovery - confirmed in the device's block diagram and electrical specifications.

What is the significance of the "Special" quality grade for UPD166104GS-E1-AZ?

The "Special" quality grade certifies that UPD166104GS-E1-AZ meets enhanced reliability and testing requirements for transportation equipment, including automobiles, trains, and safety-critical non-life-support medical devices. It reflects extended temperature range validation (−40 to +150 °C), AEC-Q100 alignment (though not formally certified), and process controls beyond standard commercial-grade parts - essential for engine control applications.