My Inquiry
My Account
STMicroelectronics STABP01D
- Part No.:
- STABP01D
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
STABP01D.pdf
- Description:
- IC AUDIO SIGNAL PROCESSOR 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,175
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STABP01D from STMicroelectronics is a digital audio processor IC designed specifically to control BASH® digital converters in high-efficiency Class-D power amplifier systems. It analyzes analog audio input, generates adaptive PWM pulses with dead-time control and soft-switching, maintains constant output-device voltage via feedback, and operates within -25°C to +85°C ambient temperature with 10V supply.
For engineers reviewing the STABP01D datasheet, STABP01D pinout, STABP01D application, or STABP01D equivalent, this device requires attention to its 20-pin SOIC package, UVLO thresholds (6.3–7.7 V start), 250 kHz oscillator accuracy, current-sense gain (2.7–3.3 V/V), and fast-attack differential gain (16–20 V/V) for BASH® amplifier integration.
Technical Context
The STABP01D implements a closed-loop PWM control architecture with integrated error amplifier, current-sense comparator, one-shot delay circuitry, and soft-switch reset logic. Its oscillator uses external Rt/Ct (22 kΩ/2.2 nF) to set 250 kHz switching frequency, and it features dual ground pins (GROUND1, GROUND2) for noise isolation between analog and power sections.
It delivers adaptive duty-cycle modulation based on real-time audio envelope analysis, includes under-voltage lockout (UVLO) with 6.3 V turn-on and 4.5 V hold threshold, and supports open-drain output drive with 200 mA sink capability for driving external MOSFET gates in buck converter stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 225–300 kHz; sets PWM switching rate for BASH® converter stage |
| Error Amp Gain | 65–90 dB; ensures stable closed-loop regulation of output voltage |
| Current Sense Gain | 2.7–3.3 V/V; scales sensed current for accurate overcurrent protection |
| UVLO Start Threshold | 6.3–7.7 V; prevents operation below safe supply voltage for reliable startup |
| Output Sink Current | 200 mA max; drives external power-stage MOSFETs directly without buffer |
| Operating Temp Range | -25°C to +85°C; validated for industrial-grade audio amplifier environments |
| Supply Voltage Range | 6–10 V; compatible with regulated 10 V rails common in Class-D amplifier supplies |
Pinout & Package
STABP01D is housed in a 20-pin Small Outline Integrated Circuit (SO20) package with standard 1.27 mm pitch, 12.6 mm × 7.4 mm body size, and exposed thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GROUND1 | Analog ground reference for error amp, comparator, and buffer sections |
| 2 | SOFT SW | Soft-switch control output; drives gate of auxiliary MOSFET to reduce EMI |
| 3 | OUT | Main PWM output; open-drain, 200 mA sink capable for primary switch driver |
| 4 | POWER SUPPLY1 | Main 10 V supply input for core logic and analog blocks |
| 5 | ONE SHOT | One-shot trigger output for pulse-width limiting and fault recovery timing |
| 6 | ONE SHOT DELAY | Delayed one-shot output used for dead-time insertion between high/low side |
| 7 | DUTY ACCEL | Duty-cycle acceleration control; adjusts response speed to audio transients |
| 8 | RECTIFIER | Rectified audio envelope input; feeds fast-attack control loop |
| 9 | FAST ATTACK | Fast-attack control input; enables rapid PWM adaptation to signal peaks |
| 10 | CLOCK (RT/CT) | Oscillator timing node; connects external 22 kΩ resistor and 2.2 nF capacitor |
| 11 | SOFT SW RESET | Reset input for soft-switch latch; synchronizes startup sequence |
| 12 | BUFFER IN | Inverting input of input buffer; accepts differential audio signal |
| 13 | BUFFER OUT | Buffered audio output; drives downstream error amplifier stage |
| 14 | VFB | Voltage feedback input; closes loop on output rail voltage regulation |
| 15 | V+ | Non-inverting input of error amplifier; references regulated output level |
| 16 | COMP | Comparator output; internal node for current-sense comparison result |
| 17 | CURRENT SENSE | Current-sense amplifier input; monitors power-stage current for protection |
| 18 | POWER SUPPLY2 | Secondary supply input; powers isolated comparator and sensing circuitry |
| 19 | GROUND2 | Power ground for current-sense and output driver sections; separates noise paths |
| 20 | OUTPUT | Main output driver terminal; connects to gate of high-side buck switch |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive PWM Generation | Real-time audio envelope analysis enables dynamic duty-cycle adjustment for >90% efficiency |
| Dual Ground Isolation | Separate GROUND1 (analog) and GROUND2 (power) minimize coupling noise in sensitive audio paths |
| Integrated Soft-Switch Control | Dedicated SOFT SW and SOFT SW RESET pins enable controlled turn-on/turn-off to reduce EMI and shoot-through risk |
| Programmable Oscillator | External RT/CT network allows precise 225–300 kHz clock tuning for optimal converter performance |
| Fault-Resilient One-Shot Logic | Two independent one-shot outputs (ONE SHOT, ONE SHOT DELAY) support robust dead-time management and overcurrent recovery |
Applications
| Home Audio Amplifiers | Automotive Infotainment Systems |
|---|---|
Use Scenario: High-fidelity stereo amplifiers using BASH® topology for compact, low-heat speaker driving. IC Role / Device Role / Timing Role: Digital audio processor generating adaptive PWM signals and managing feedback-controlled voltage regulation. Use Value: Enables >90% power efficiency and reduced heatsink requirements versus linear amplifiers. | Use Scenario: OEM dashboard audio subsystems requiring EMI-compliant, thermally efficient amplification. IC Role / Device Role / Timing Role: Core timing and control IC coordinating buck converter switching and current-sense protection. Use Value: Supports ASIL-B compatible designs via UVLO, overcurrent detection, and soft-switch sequencing. |
| Professional PA Mixers | Active Studio Monitors |
Use Scenario: Multi-channel powered mixers needing scalable, low-noise Class-D output stages. IC Role / Device Role / Timing Role: Audio envelope processor with fast-attack control and dual-ground layout for channel isolation. Use Value: Delivers transient response <150 ns and THD+N <0.05% at full power through precise duty-acceleration. | Use Scenario: Bi-amplified studio monitors with separate woofer/tweeter drivers and active crossovers. IC Role / Device Role / Timing Role: Dual-output controller managing independent buck stages per driver band. Use Value: Enables independent voltage regulation per band via VFB/V+ inputs and isolated GROUND2 routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital audio processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STA575 | Integrated Class-D power stage (70 W); STABP01D is controller-only with external FET drive | STA575 replaces both STABP01D and external MOSFETs; no discrete buck stage needed | Select STA575 for space-constrained designs where integrated power stage suffices |
| TAS5630 | TI digital input Class-D controller; supports I²S/PCM, no analog envelope input or soft-switch pins | TAS5630 targets digital-source systems; lacks analog rectifier/fast-attack path for legacy line-level inputs | Select TAS5630 only when system uses digital audio interface and does not require analog envelope tracking |
Compared with STA575 and TAS5630, STABP01D uniquely provides analog envelope-based PWM control, dedicated soft-switch logic, and dual-ground isolation-making it irreplaceable in legacy BASH® amplifier designs requiring external MOSFETs and analog input compatibility.
Availability
STABP01D is available at Aetrix Electronics and suitable for home audio amplifiers, automotive infotainment systems, and professional PA mixers requiring stable component supply and long-lifecycle support.
Supply support for STABP01D 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, designing and manufacturing microcontrollers, analog ICs, power management, and audio solutions for industrial, automotive, and consumer markets.
The STABP01D belongs to ST's BASH® digital audio processor product line, engineered specifically to enable high-efficiency, low-EMI Class-D amplifier systems with analog input compatibility and adaptive PWM control.
FAQ
What is the function of the CLOCK (RT/CT) pin on STABP01D?
The CLOCK (RT/CT) pin connects to an external resistor (22 kΩ) and capacitor (2.2 nF) to set the internal oscillator frequency between 225 kHz and 300 kHz. This frequency determines the PWM switching rate for the BASH® digital converter stage and directly impacts efficiency, EMI profile, and inductor sizing in the buck converter.
Does STABP01D support digital audio inputs like I²S or SPDIF?
No. STABP01D accepts only analog audio inputs via BUFFER IN and RECTIFIER pins. It performs analog envelope detection and fast-attack control-not digital signal processing. For digital-input Class-D controllers, ST offers separate devices such as the TDA7492 or TAS5630, which are not drop-in replacements.
Can STABP01D operate with a 5 V supply?
No. STABP01D requires a minimum 6.3 V supply to exit under-voltage lockout and has an absolute maximum rating of 10.5 V. Operation at 5 V will prevent startup and may cause undefined behavior. A regulated 10 V rail is recommended per the datasheet's typical application circuit.
How is current sensing implemented in STABP01D?
Current sensing is performed via the CURRENT SENSE pin, which receives a scaled voltage from a shunt resistor in the power stage. The internal current-sense amplifier provides 2.7–3.3 V/V gain and compares the signal against a 0.9–1.1 V threshold to trigger overcurrent protection and adjust PWM duty cycle dynamically.
STABP01D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Bash®
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Audio Signal Processor
- Applications:
- Digital Audio Interfacing
- Number of Channels:
- 1
- Interface:
- Serial
- Voltage - Supply:
- 10.5V
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Specifications:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
STABP01D FAQ
1.How can I place an order for STABP01D through Aetrix?
Please submit a Request for Quotation (RFQ) for STABP01D 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 STABP01D reliable?
The price and inventory of STABP01D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STABP01D is usually 5 days.
3.What payment methods are accepted for STABP01D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STABP01D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STABP01D?
STABP01D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STABP01D 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 STABP01D?
For technical support, including STABP01D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STABP01D requirements.
6.How does Aetrix verify that STABP01D is sourced from the original manufacturer or authorized distributors?
All STABP01D 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 STABP01D meets industry standards.
7.What is the process for return or replacement of STABP01D?
All STABP01D units undergo pre-shipment inspection (PSI). If there is an issue with STABP01D, 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 STABP01D part is unused and in its original packaging.
Return procedure for STABP01D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STABP01D Tags
-
SA571DR2G
onsemi
-
ADAU7002ACBZ-R7
Analog Devices Inc.
-
DRV135UA/2K5
Texas Instruments
-
DRV134UA/1K
Texas Instruments
-
DRV134PA
Texas Instruments
-
DRV134UA
Texas Instruments
-
DRV135UA
Texas Instruments
-
SA572DR2G
onsemi
-
PGA2311U/1K
Texas Instruments
-
SI8244BB-D-IS1R
Skyworks Solutions Inc.
-
CS8416K-CZZR
Cirrus Logic Inc.
-
SRC4392IPFBR
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…
