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STMicroelectronics VB325SP
- Part No.:
- VB325SP
- Manufacturer:
- STMicroelectronics
- Package:
- PowerSO-10 Exposed Bottom Pad
- Datasheet:
-
VB325SP.pdf
- Description:
- IC PWR DRVR BIPOLAR 1:1 PWRSO10
- Quantity:
- Payment:
- Shipping:
Inventory:4,617
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Product details
Overview
VB325SP from STMicroelectronics is a high-voltage ignition coil driver power IC fabricated in VIPower™ M1-3 technology, integrating a vertical current flow Darlington output stage with logic-level input compatibility. It delivers 10 A coil current limit, 380 V internal high-voltage clamp, and quasi-proportional base drive-designed for electronic ignition systems in automotive gasoline engines where precise dwell control and spark timing integrity are critical.
For engineers reviewing the VB325SP datasheet, VB325SP pinout, VB325SP application, or VB325SP equivalent, this device is selected for its integrated thermal shutdown, low-voltage clamp during overtemperature, open-emitter diagnostic flag output, and PowerSO-10™ package suitability for high-power inductive switching in engine control units.
Technical Context
The VB325SP operates as a smart high-side switch with internally set coil current limit (9–11 A) and dual-stage voltage clamping: high-voltage clamp at 320–420 V and low-voltage clamp at 30–50 V during thermal intervention. Its enable pin provides external blocking capability independent of input state.
It features a diagnostic flag output that goes high when coil current exceeds 4.25–4.75 A, with temperature-stable threshold drift, and integrates antiparallel diode protection (VF = 2 V at –1 A) plus single-pulse avalanche energy rating of 180 mJ at 8 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Collector Voltage (Vcl) | 380 V - Internally clamped to protect ignition coil and MCU from flyback transients |
| Coil Current Limit (Icl) | 10 A - Fixed internal limit ensures consistent spark energy across temperature (–40°C to +125°C) |
| Thermal Shutdown Threshold (Tsd) | 150 °C - Triggers low-voltage clamp to reduce collector current smoothly and prevent misfire |
| Flag Output Threshold (IdiagTH) | 4.5 A - Open-emitter diagnostic signal activates above this current for real-time coil health monitoring |
| Power Dissipation (Pmax) | 125 W - Rated at Tc = 25°C; enabled by Rthj-case = 1 °C/W in PowerSO-10™ package |
| Turn-off Time (tOFF) | 15–25 µs - Fast deactivation supports high-RPM ignition timing accuracy up to ~10,000 RPM |
| ESD Rating (HVC pin) | ±4 kV - Robustness against ignition-system ESD events without external protection |
Pinout & Package
VB325SP is housed in PowerSO-10™, a thermally enhanced surface-mount package with exposed metal tab (HVC) for direct heatsinking and low Rthj-case (1 °C/W). Pin 1–5 are LGND; Pins 2–4 are GND; TAB connects to HVC (primary coil output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 LGND | Signal Ground Reference | Provides low-noise reference for internal logic and flag comparator; must be externally tied to Pins 2–4 |
| 2–4 GND | Emitter Power Ground | Carries high-current return path for coil discharge; shared ground plane minimizes voltage bounce |
| 6 E | Enable Control Input | Logic-level enable/disable override: floating = OFF; ≥2 V = active; ≤0.4 V = disabled regardless of INPUT |
| 7 VCC | Logic Supply Input | 5 V ±10% supply for internal driver circuitry; decoupling required per Figure 5 (1 µF + 100 nF) |
| 8 BD | Darlington Base Drive Output | Internally generated quasi-proportional base current; not user-accessible-drives internal Darlington directly |
| 9 INPUT | Logic Input Channel | Active-high input with internal pull-down; 4 V min high threshold ensures noise immunity in automotive environments |
| 10 FLAG | Diagnostic Open-Emitter Output | Signals >4.5 A coil current; requires external pull-up (e.g., 22 kΩ) to VCC for logic-level interface |
| TAB HVC | High-Voltage Collector Output | Primary coil driver node; rated 380 V clamp; exposed metal tab serves as thermal path and high-current terminal |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High-Voltage Clamp | 380 V clamping protects coil insulation and downstream electronics from flyback spikes without external snubbers |
| Thermal Self-Protection with Low-Voltage Clamp | At 150 °C junction, forces smooth collector current decay to avoid thermal runaway while preventing unintended spark |
| Diagnostic Flag with Stable Threshold | 4.5 A ±0.25 A flag activation point with <±0.5 A drift over –40°C to +125°C enables reliable coil current monitoring |
| Logic-Level Compatible Input | 4 V minimum high-level threshold and internal pull-down eliminate need for external level-shifting or biasing circuits |
| Robust Automotive Transient Immunity | Withstands –100 V/2 ms and +100 V/0.2 ms battery line transients per ISO 7637-2 without external protection |
Applications
| Gasoline Engine Ignition Control | Direct-Drive Coil-On-Plug Systems |
|---|---|
|
Use Scenario: Microcontroller-driven dwell time and spark timing in 4–8 cylinder port fuel injection engines. IC Role / Device Role / Timing Role: High-side power switch controlling primary coil current; flag output feeds back real-time current status to MCU for closed-loop dwell adjustment. Use Value: Eliminates discrete Darlington + protection diode + current sense + clamp circuit, reducing BOM count by ≥5 components and PCB area by >30%. |
Use Scenario: Compact coil-on-plug (COP) modules mounted directly on spark plugs in modern DOHC engines. IC Role / Device Role / Timing Role: Primary driver with integrated thermal shutdown and diagnostic flag-enables self-monitoring without external sensors. Use Value: Enables COP module compliance with AEC-Q100 Grade 0 (–40°C to +150°C) using single-chip solution and PowerSO-10™ thermal performance. |
| Two-Stroke Marine Ignition | Small Engine Electronic Ignition |
|
Use Scenario: High-RPM marine outboard engines requiring robust spark under wide battery voltage range (5.3–24 V). IC Role / Device Role / Timing Role: Primary coil driver with built-in low-voltage clamp and transient immunity-maintains spark consistency despite cranking dips and load dump surges. Use Value: Sustains reliable ignition at 12,000+ RPM due to 25 µs max turn-off time and stable 4.5 A flag threshold across temperature. |
Use Scenario: Lawnmowers, generators, and snowblowers with microcontroller-based CDI replacement systems. IC Role / Device Role / Timing Role: Smart ignition driver replacing mechanical breaker points and discrete transistor switches. Use Value: Reduces field failure rate by 70% vs. discrete solutions via integrated overvoltage, overcurrent, and thermal protection-all in one die. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage ignition driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STGD3HF60L | 600 V, 3 A IGBT with separate gate driver; no integrated current limit or flag output | Requires external current sensing, clamping, and thermal management; suited for custom high-efficiency designs | Choose when higher voltage margin (>420 V) is needed and system-level diagnostics are implemented externally |
| TPIC8101 | 105 V max clamp, 5 A current limit, SPI-configurable; lacks low-voltage clamp and thermal shutdown | Designed for lower-energy coils; requires external watchdog and thermal monitoring circuitry | Choose for cost-sensitive 12 V systems with modest spark energy and existing MCU-based diagnostics infrastructure |
Compared with STGD3HF60L and TPIC8101, VB325SP uniquely combines 380 V clamp, 10 A current limit, thermal self-protection with low-voltage clamp, and diagnostic flag in a single PowerSO-10™ package-making it the only drop-in solution for legacy and new AEC-Q100-compliant gasoline ignition modules requiring zero external protection components.
Availability
VB325SP is available at Aetrix Electronics and suitable for gasoline engine control units, coil-on-plug modules, marine outboard ignition systems, and small-engine electronic ignition requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for VB325SP 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 headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with broad manufacturing scale and AEC-Q100 qualification expertise.
VB325SP belongs to ST's VIPower™ family of intelligent power ICs, engineered specifically for high-reliability automotive power switching applications-including ignition, fuel injection, and body electronics-where integration, ruggedness, and thermal autonomy are mandatory.
FAQ
What is the function of the ENABLE pin on VB325SP?
The ENABLE pin (Pin 6) provides hardware-level override control: when pulled ≥2 V, the device operates normally; when ≤0.4 V, output remains off regardless of INPUT state; if left floating, output is forced off. This allows fail-safe shutdown during system initialization or fault conditions without MCU involvement.
Does VB325SP require an external flyback diode?
No. VB325SP integrates an antiparallel diode with 2 V forward voltage at –1 A, rated for single-pulse avalanche energy of 180 mJ. External diodes are unnecessary unless system-level energy dissipation exceeds this rating or bidirectional transient suppression is required beyond the IC's ±4 kV ESD capability on HVC.
How does the FLAG output behave during thermal shutdown?
During thermal shutdown, the FLAG output remains high as long as coil current exceeds 4.5 A-even while low-voltage clamp reduces current. It transitions low only after current falls below the threshold, providing unambiguous indication of both overcurrent and thermal stress events to the host controller.
Can VB325SP operate with battery voltages below 5.3 V?
Per datasheet Note 1, parametric degradation is allowed below 5.3 V. While functional down to ~4 V, coil current regulation and flag accuracy degrade; startup behavior becomes unreliable below 5.3 V. For cranking scenarios, system design must ensure VCC remains ≥4.5 V and HVC rail stays within operational limits using local regulation or hold-up capacitance.
VB325SP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- PowerSO-10 Exposed Bottom Pad
- Series:
- VIPower™
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- Low Side
- Output Type:
- Bipolar
- Interface:
- Parallel
- Voltage - Load:
- 30V (Max)
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Current - Output (Max):
- 10A
- Rds On (Typ):
- -
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Over Temperature
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-PowerSO
VB325SP FAQ
1.How can I place an order for VB325SP through Aetrix?
Please submit a Request for Quotation (RFQ) for VB325SP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VB325SP reliable?
The price and inventory of VB325SP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VB325SP is usually 5 days.
3.What payment methods are accepted for VB325SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VB325SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VB325SP?
VB325SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VB325SP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VB325SP?
For technical support, including VB325SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VB325SP requirements.
6.How does Aetrix verify that VB325SP is sourced from the original manufacturer or authorized distributors?
All VB325SP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VB325SP meets industry standards.
7.What is the process for return or replacement of VB325SP?
All VB325SP units undergo pre-shipment inspection (PSI). If there is an issue with VB325SP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VB325SP part is unused and in its original packaging.
Return procedure for VB325SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VB325SP Tags
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