My Inquiry
My Account
Texas Instruments UC3176QPTR
- Part No.:
- UC3176QPTR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
UC3176QPTR.pdf
- Description:
- IC POWER 2 CIRCUIT 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,081
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UC3176QPTR from Texas Instruments is a dual-channel full-bridge power amplifier IC with integrated current sense amplifiers, ±2A guaranteed output current, 3V–35V supply operation, and built-in under-voltage lockout and parking function-designed for precision servo control in disk head positioning systems.
For engineers reviewing the UC3176QPTR datasheet, UC3176QPTR pinout, UC3176QPTR application, or UC3176QPTR equivalent, this device requires attention to its PLCC-28 package thermal management, dual supply monitoring inputs (UV1/UV2), safe operating area protection, and bridge-mode current sensing accuracy within ±10 mA at 2A load.
Technical Context
The UC3176QPTR implements two independent high-side/low-side power op-amps per channel with foldback current limiting and thermal shutdown. Its precision current sense amplifier delivers 8.0 V/V gain and ≤10 mA differential error at 2A output, enabling closed-loop current mode control without external sensing resistors.
It features dual programmable under-voltage comparators (thresholds 1.44–1.56 V with 50–80 mV hysteresis) and a dedicated Park/Inhibit input (1.1–1.7 V threshold) that disables outputs and activates a 200 mA open-collector parking drive-critical for fail-safe motor hold during brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 3V to 35V continuous operation-supports wide industrial and servo bus voltages without external regulators. |
| Output Current (Continuous) | ±2A per channel-enables direct driving of medium-power voice coil motors or stepper windings. |
| Current Sense Accuracy | ±10 mA error at 2A bridge current-allows precise torque or force regulation in closed-loop servo systems. |
| Thermal Shutdown Threshold | 165°C junction temperature-prevents latch-up during overload or poor heatsinking conditions. |
| Input Offset Voltage (Power Amp) | 8 mV max-minimizes static position error in analog position control loops. |
| Unity Gain Bandwidth | 1 MHz-supports stable servo loop compensation up to ~100 kHz closed-loop bandwidth. |
| Parking Drive Output | 200 mA continuous sink-directly energizes holding coils or brake solenoids without external drivers. |
Pinout & Package
UC3176QPTR is housed in a 28-pin PLCC (FN) package with exposed thermal pad on underside (pins 12–18 as GND heat flow paths). The package meets JEDEC MS-018, RoHS-compliant, MSL Level-3, and supports reflow up to 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VIN (Pin 1) | Main power supply input | Accepts 3–35V; powers all internal circuitry and output stages. |
| B Output (Pin 2) | Channel B high-side driver output | Drives one side of full-bridge load; rated for 2.5A sink capability. |
| BISINK / BISINK (Sense) (Pins 3–4) | Channel B current sense terminals | Differential inputs to internal current sense amp; enable bidirectional load current measurement. |
| Park/Inhibit (Pin 10) | Active-low safety control input | Disables both power amps and asserts parking drive when voltage <1.1 V. |
| Parking Drive (Pin 11) | Open-collector output | Sinks up to 200 mA to engage mechanical park/brake circuits. |
| UV1 / UV2 (Pins 19–20) | Dual supply monitoring inputs | Programmable under-voltage comparators with independent thresholds and hysteresis. |
| A+ / A– / B– (Pins 22–23, 8) | Differential input pairs | Accept command signals for each channel's power op-amp; support voltage- or current-mode drive. |
| AISINK / AISINK (Sense) (Pins 25–26) | Channel A current sense terminals | Matched to BISINK pair; enables simultaneous dual-channel current feedback. |
Key Features
| Feature | Design Value |
|---|---|
| Dual full-bridge power amplifiers | Two independent 2A H-bridge channels with integrated high-side/low-side drivers and thermal foldback. |
| Precision current sense amplifier | 8.0 V/V gain, ±3 mV offset, 1 MHz bandwidth-enables accurate real-time load current feedback without external gain stages. |
| Programmable dual supply monitoring | Two independent UV comparators (1.44–1.56 V threshold, 50–80 mV hysteresis) for redundant rail supervision. |
| Fail-safe parking function | 200 mA parking drive activated on Park/Inhibit assertion-holds actuator position during power loss or fault. |
| Safe operating area protection | Combined thermal shutdown (165°C), foldback current limiting, and saturation voltage monitoring prevent destructive failure. |
Applications
| Hard Disk Drive Actuator Control | Optical Pickup Positioning |
|---|---|
Use Scenario: Precise radial positioning of read/write heads across spinning platters using voice coil motors (VCM). IC Role / Device Role / Timing Role: Full-bridge power amplifier with real-time current feedback for closed-loop force control and dynamic braking. Use Value: ±2A output and ±10 mA current sense error at 2A enable sub-micron positioning accuracy and repeatable track-following performance. |
Use Scenario: Fine focus and tracking control of laser diode assemblies in CD/DVD/Blu-ray optical drives. IC Role / Device Role / Timing Role: Dual-channel servo driver delivering synchronized push-pull current to focus/tracking coils. Use Value: Matched channel gain (8.0 V/V) and low input offset (8 mV) minimize cross-axis coupling and improve signal-to-noise ratio in high-bandwidth servo loops. |
| Tape Drive Capstan Motor Control | Industrial Linear Actuator Interface |
Use Scenario: Constant-tension tape transport via capstan motor with dynamic torque compensation. IC Role / Device Role / Timing Role: Current-mode bridge driver with dual supply monitoring to maintain tension during voltage sags. Use Value: UV1/UV2 inputs allow independent monitoring of logic and motor rails; Park/Inhibit halts motion and engages brake on brownout. |
Use Scenario: Driving linear solenoid or voice-coil actuators in automated test equipment and factory automation. IC Role / Device Role / Timing Role: Robust power interface with thermal shutdown and parking drive for emergency hold. Use Value: 165°C thermal cutoff and 200 mA parking drive provide deterministic fail-safe behavior required for ISO 13849-compliant motion control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar full-bridge power amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3177QPTR | Includes Supply OK open-collector output (30 mA); lacks UC3176's B+ input pin (Pin 9 used for Supply OK instead). | Preferred where system-level power-good signaling is required; not pin-compatible due to Pin 9 function reassignment. | Select UC3177QPTR only if Supply OK status reporting is needed and board layout allows pin function change at Pin 9. |
| LMD18200T | Single-channel 3A H-bridge; no integrated current sense amp or dual UV comparators; higher RDS(on) (1.3 Ω typical). | Suitable for simpler unidirectional or lower-precision motion control; requires external current sensing and UV monitoring circuitry. | Choose LMD18200T when cost sensitivity outweighs integration needs and design can accommodate external support components. |
Compared with UC3176QPTR, UC3177QPTR adds system-level power status signaling but sacrifices B+ input flexibility, while LMD18200T reduces integration depth-requiring external sensing and monitoring but offering higher single-channel current rating and broader availability.
Availability
UC3176QPTR is available at Aetrix Electronics and suitable for hard disk actuator control, optical pickup positioning, tape drive capstan regulation, and industrial linear actuator interfaces requiring stable component supply and long-term obsolescence mitigation.
Supply support for UC3176QPTR 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies since 1930.
The UC3176QPTR belongs to TI's legacy high-reliability power amplifier product line, engineered specifically for demanding servo applications including disk drive head positioning and precision electromechanical actuation.
FAQ
What is the maximum continuous output current specification for UC3176QPTR?
The UC3176QPTR guarantees ±2A continuous output current per channel under specified thermal conditions (TC = +75°C). Its output stage supports 2.5A sink capability on low-side transistors, with total supply current limited to 4A. Thermal derating applies above 75°C case temperature, and safe operating area protection prevents damage during transient overloads.
Does UC3176QPTR include an integrated current sense amplifier, and what is its accuracy?
Yes, UC3176QPTR integrates a precision current sense amplifier with 8.0 V/V gain, ±3 mV input offset voltage, and differential error of ≤10 mA at 2A bridge current. It uses dedicated AISINK/BISINK sense terminals to measure load current without external shunts, supporting both voltage- and current-mode servo control architectures directly.
How does the Park/Inhibit function operate in UC3176QPTR?
The Park/Inhibit input (Pin 10) disables both power amplifiers and activates the 200 mA parking drive output (Pin 11) when driven below 1.1 V. This provides fail-safe mechanical hold during power loss or system faults. The input has 1.1–1.7 V threshold range and draws only 60–100 µA at threshold, enabling direct microcontroller GPIO control without buffering.
What package type and thermal characteristics apply to UC3176QPTR?
UC3176QPTR uses a 28-pin PLCC (FN) package with exposed thermal pad (pins 12–18 as GND heat flow paths). Its thermal resistance is θJL = 15°C/W (junction-to-leads) and θJA = 50°C/W (junction-to-ambient). Maximum power dissipation at TC = +75°C is 4W, requiring appropriate PCB copper area and airflow for sustained 2A operation.
Is UC3176QPTR pin-compatible with UC3177QPTR?
No, UC3176QPTR is not pin-compatible with UC3177QPTR. While both share the same PLCC-28 footprint and most pin functions, Pin 9 serves as B+ input on UC3176QPTR but as Supply OK output on UC3177QPTR. This functional reassignment prevents direct substitution without PCB modification, despite identical packaging and shared electrical specifications elsewhere.
UC3176QPTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Power
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 8 mV
- Current - Supply:
- 21mA (x2 Channels)
- Current - Output / Channel:
- 3.5 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 35 V
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
UC3176QPTR FAQ
1.How can I place an order for UC3176QPTR through Aetrix?
Please submit a Request for Quotation (RFQ) for UC3176QPTR 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 UC3176QPTR reliable?
The price and inventory of UC3176QPTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC3176QPTR is usually 5 days.
3.What payment methods are accepted for UC3176QPTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC3176QPTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC3176QPTR?
UC3176QPTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC3176QPTR 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 UC3176QPTR?
For technical support, including UC3176QPTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC3176QPTR requirements.
6.How does Aetrix verify that UC3176QPTR is sourced from the original manufacturer or authorized distributors?
All UC3176QPTR 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 UC3176QPTR meets industry standards.
7.What is the process for return or replacement of UC3176QPTR?
All UC3176QPTR units undergo pre-shipment inspection (PSI). If there is an issue with UC3176QPTR, 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 UC3176QPTR part is unused and in its original packaging.
Return procedure for UC3176QPTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UC3176QPTR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
