Renesas UPD166026T1K-E1-AY

Overview

UPD166026T1K-E1-AY from Renesas Electronics is a dual-channel N-channel high-side intelligent power switch with charge pump, 3.3V-compatible logic interface, 16 mΩ on-state resistance per channel at 25°C, integrated proportional current sense (K_ILIS = 4640–6960), and AEC-Q100 qualified for automotive 14V DC grounded load switching - e.g., 40–55W light bulbs and LED arrays.

For engineers reviewing the UPD166026T1K-E1-AY datasheet, UPD166026T1K-E1-AY pinout, UPD166026T1K-E1-AY application, or UPD166026T1K-E1-AY equivalent, this device delivers diagnostic feedback, short-circuit protection with 68–114A detection threshold, thermal toggling at 150°C, active clamp for inductive loads, and loss-of-ground immunity - critical for fail-safe power distribution in automotive body control modules.

Technical Context

This 2nd-generation IPD implements dual independent high-side channels in a single 24-pin Power HSSOP package, each featuring voltage-controlled input with VIH ≥ 2.5V and VIL ≤ 0.8V, built-in charge pump enabling full enhancement at low VCC (down to 4.5V), and dynamic gate control for fast turn-on (200 µs) and turn-off (200 µs) with controlled slew rates (±1.0 V/µs).

Its protection architecture includes three-tiered fault response: latched shutdown for overcurrent (IL > 114A), auto-restarting power limitation mode triggered by ΔT_ch > 50°C, and absolute thermal toggling at T_ch = 150°C with 20°C hysteresis - all coordinated via analog IS pin feedback and digital SEN enable control.

Key Specifications

Pinout & Package

UPD166026T1K-E1-AY is housed in a thermally enhanced 24-pin Power HSSOP package with exposed VCC tab for PCB heat sinking. Pin 1 is GND1; pins 20–23 and 14–17 are duplicated OUT1 and OUT2 terminals respectively to reduce bond-wire inductance and improve current sharing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN32F0B and TPS4H160-Q1, UPD166026T1K-E1-AY uniquely combines dual-channel 16mΩ high-side switching, AEC-Q100 qualification, analog current sense with ±5% drift, and three-tier thermal protection - making it optimal for automotive body electronics requiring simultaneous, independently monitored load control without added MCU overhead.

Availability

UPD166026T1K-E1-AY is available at Aetrix Electronics and suitable for automotive lighting control, body control module (BCM) power distribution, and engine bay solenoid switching requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for UPD166026T1K-E1-AY 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 is a global semiconductor leader specializing in microcontrollers, analog, and power management ICs for automotive, industrial, and IoT applications.

UPD166026T1K-E1-AY belongs to Renesas' 2nd-generation Intelligent Power Device family, engineered specifically for robust, diagnostic-capable high-side switching in automotive 12V/24V systems with stringent safety and reliability requirements.

FAQ

What is the maximum continuous current rating per channel for UPD166026T1K-E1-AY?

The UPD166026T1K-E1-AY supports up to 6.8A continuous current per channel at T_ch = 25°C with R_ON = 16 mΩ. Derating applies at higher temperatures: at 150°C, R_ON rises to 32 mΩ, limiting practical continuous current to ~4.8A under typical PCB thermal conditions. This rating assumes proper heatsinking via the exposed VCC tab on a 50mm × 50mm FR4 board with 6 cm² copper area.

How does the proportional current sense function work on UPD166026T1K-E1-AY?

The UPD166026T1K-E1-AY delivers analog current feedback via its IS1 and IS2 pins, where I_IS = I_L / K_ILIS. With K_ILIS ranging from 4640 to 6960 (for 6.0A load), a 6.0A output yields 0.86–1.30mA sense current. The ratio drifts ±5% over temperature and load, enabling accurate real-time monitoring without external shunts - critical for detecting partial shorts or aging loads before catastrophic failure.

Does UPD166026T1K-E1-AY support inductive load switching, and how is flyback energy managed?

Yes, UPD166026T1K-E1-AY includes an integrated active clamp circuit that activates during inductive turn-off. When V_OUT falls below GND, the internal clamp diode connects to the MOSFET gate, limiting V_OUT to 30–40V (at 13.5V V_CC). This suppresses destructive flyback spikes, eliminates need for external freewheeling components, and enables reliable switching of solenoids, relays, and motors in automotive engine compartments.

What protection features are implemented in UPD166026T1K-E1-AY, and how do they differ?

UPD166026T1K-E1-AY implements three distinct protection layers: (1) Latched overcurrent shutdown (IL > 114A), (2) Auto-recovering power limitation triggered by ΔT_ch > 50°C, and (3) Absolute thermal toggling at T_ch = 150°C with 20°C hysteresis. Each triggers unique IS pin behavior - latched fault current, pulsing fault current during power limitation, or sustained fault current during thermal toggling - enabling precise root-cause diagnosis by the host MCU.

Is UPD166026T1K-E1-AY compatible with 3.3V microcontrollers, and what interface considerations apply?

Yes, UPD166026T1K-E1-AY is fully 3.3V-compatible: its IN1/IN2 inputs accept VIH ≥ 2.5V and VIL ≤ 0.8V, matching standard 3.3V CMOS logic levels. No level-shifting is needed. However, series resistors (2–50kΩ) are recommended between MCU GPIO and IN/SEN pins to limit ESD stress and filter noise - per Renesas' layout guidance in Section 6 of the datasheet.