STMicroelectronics VN920B5HTR-E

Overview

VN920B5HTR-E from STMicroelectronics is a single-channel automotive-grade high-side driver IC in P2PAK package, designed for ground-referenced resistive/inductive loads. It features 16 mΩ R_DS(on), 30 A continuous output current, CMOS-compatible input logic, proportional analog current sense (K ≈ 4400), and integrated protections including thermal shutdown (T_SD = 150 °C), undervoltage lockout (V_USD = 4 V), overvoltage clamp (V_CLAMP = 48 V), and active current limitation (I_LIM = 45 A). It is used in body control modules for headlight, fog lamp, and HVAC blower switching.

For engineers reviewing the VN920B5HTR-E datasheet, VN920B5HTR-E pinout, VN920B5HTR-E application, or VN920B5HTR-E equivalent, key selection considerations include its AEC-Q100 qualification, ISO 7637-2 transient immunity, load-disconnect detection, proportional current sense accuracy (±8% drift over temperature), and P2PAK thermal performance (R_thj-case = 1.3 °C/W).

Technical Context

The VN920B5HTR-E integrates VIPower™ M0-3 vertical power technology with embedded protection logic: thermal shutdown triggers at 150 °C with 15 °C hysteresis, and overcurrent limiting activates dynamically based on case temperature (e.g., 75 A at T_c = 25 °C, 30 A at T_c = 150 °C). Its analog current sense output delivers I_SENSE = I_OUT/K with K = 4400 typ. (±8% over -40 to 150 °C) and 500 µs response delay.

Input logic uses hysteresis (V_IH = 3.25 V, V_IL = 1.25 V, ΔV = 0.5 V) for noise immunity; output voltage slope is controlled during switching (dV_OUT/dt ≈ 350–450 V/ms) to limit EMI. The device disables output if GND is disconnected and clamps V_CC transients up to 100 V per ISO 7637-2 Pulse 2a/3b.

Key Specifications

Pinout & Package

Package: P2PAK (Power Package with 5 leads, surface-mount, isolated tab). Thermal resistance junction-to-case is 1.3 °C/W, enabling high-power operation with minimal PCB copper (0.5 cm² sufficient for 30 A at T_c ≤ 100 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side driver applications.

Compared with INFINEON BTS50085-1TAD and NXP MC33883, the VN920B5HTR-E offers superior thermal robustness (150 °C shutdown with 15 °C hysteresis), integrated GND-fault detection, and full ISO 7637-2 compliance without external components - making it optimal for high-reliability, single-load, under-hood applications where space and BOM simplification are critical.

Availability

VN920B5HTR-E is available at Aetrix Electronics and suitable for automotive body electronics, lighting control, and HVAC subsystems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for VN920B5HTR-E 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

STMicroelectronics is a global semiconductor leader specializing in automotive, industrial, and power management ICs, with manufacturing certified to IATF 16949 and environmental standards including RoHS and ECOPACK®.

The VN920B5HTR-E belongs to ST's VIPower™ high-side driver family, engineered specifically for AEC-Q100-compliant automotive power distribution - emphasizing protection integration, diagnostic capability, and thermal resilience in harsh environments.

FAQ

What is the maximum allowable PCB copper area for thermal management of VN920B5HTR-E?

The datasheet specifies two thermal test conditions: 0.5 cm² of 35 µm copper yields R_thj-amb = 51.3 °C/W, while 6 cm² reduces it to 37 °C/W. For 30 A continuous operation at 125 °C ambient, ST recommends ≥3 cm² of double-sided copper with thermal vias to the inner ground plane to maintain T_j < 150 °C. No external heatsink is required if PCB layout follows AN4774 guidelines.

How does the current sense disable function operate?

Connecting a resistor (typically 10 kΩ) between C.SENSE and GND disables the current sense output by shunting I_SENSE to ground. This reduces system standby current and isolates the sense node during MCU sleep modes. The device continues normal switching operation; only analog feedback is disabled. The resistor value must be low enough to sink >10 µA to ensure full disable but high enough to avoid loading the sense line during active use.

Can VN920B5HTR-E drive inductive loads without external flyback diodes?

Yes - the integrated V_CC clamp diode and active demagnetization circuit (V_DEMAG = V_CC − 48 V) safely absorb inductive energy during turn-off. For a 6 mH load at 2 A, the device clamps at ~−35 V (with V_CC = 13.5 V), eliminating need for external freewheeling diodes. However, external RC snubbers may still be advised for ultra-low-EMI designs per CISPR 25 Class 5.

What failure modes trigger diagnostic reporting via the current sense pin?

The C.SENSE pin reports four distinct fault states: (1) Overtemperature - outputs V_SENSEH = 5.5 V (open-circuit condition); (2) Undervoltage - pulls to 0 V; (3) Overvoltage - pulls to 0 V; (4) Short-to-GND - outputs nominal I_SENSE until thermal shutdown activates, then transitions to V_SENSEH. These states are decoded via the truth table (Table 11) and require no additional hardware - only MCU ADC or comparator monitoring.