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Diodes Incorporated PAM8902HKER
- Part No.:
- PAM8902HKER
- Manufacturer:
- Diodes Incorporated
- Category:
- Audio Amplifiers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
PAM8902HKER.pdf
- Description:
- IC AMP CLASS D MONO 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,783
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Product details
Overview
PAM8902HKER from Diodes Incorporated is a mono Class-D audio amplifier with integrated 1.5MHz boost converter, designed specifically for driving piezoelectric and ceramic speakers. It delivers 30VPP (10.6Vrms) output from a 3.6V supply, supports three selectable gain modes (21dB/26dB/32.5dB), and provides programmable boost output voltages (8V/12V/17.5V) via the VSET pin - enabling high-fidelity audio in space-constrained portable electronics.
For engineers reviewing the PAM8902HKER datasheet, PAM8902HKER pinout, PAM8902HKER application, or PAM8902HKER equivalent, key selection considerations include its differential Class-D output architecture, integrated boost converter compensation requirements, thermal shutdown behavior at +150°C, and dual-package availability (W-QFN4040-16) for layout flexibility in ultra-thin handheld devices.
Technical Context
The PAM8902HKER integrates a fixed-frequency 1.5MHz boost converter with external inductor control and a fully differential Class-D amplifier stage operating at 225–475kHz switching frequency. Its closed-loop gain is set by resistor ratios on GSET, with internal 77.4kΩ RIN and matched RF values ensuring >60dB CMRR and <0.3% THD+N at 5Vrms output.
Protection circuitry includes undervoltage lockout (2.2V threshold), latch-type short-circuit protection requiring ENA reset, and non-latched overtemperature shutdown with +30°C hysteresis. The device uses two independent power grounds (PGND1 for boost, PGND2 for Class-D) and separate analog/digital ground domains to suppress noise coupling between power conversion and audio paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - enables direct Li-ion battery operation without pre-regulation |
| Output Voltage (VPP) | 30VPP (10.6Vrms) - sufficient to drive high-impedance piezo speakers up to 100nF load |
| Boost Switching Frequency | 1.5MHz (typ) - allows use of small 1µH inductors and minimizes EMI in RF-sensitive zones |
| Class-D Switching Frequency | 225–475kHz - avoids audible band while enabling efficient LC filter design with <10µH inductors |
| Gain Settings | 21dB / 26dB / 32.5dB - selected via GSET pin voltage level, supporting variable speaker sensitivity |
| THD+N | 0.3% (max) at 5Vrms - meets fidelity requirements for voice prompts and notification tones |
| Shutdown Current | <1µA - preserves battery life during standby in always-on portable devices |
Pinout & Package
Package: W-QFN4040-16 (4.0mm × 4.0mm, 0.65mm pitch, exposed thermal pad). Pinout validated per Diodes DS36453 Rev. 6–3, Page 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ENA | Chip Enable Input | Active-high logic control; must be pulled ≥1.2V to enable operation; resets short-circuit latch when cycled |
| INP / INN | Differential Audio Inputs | High-impedance (150kΩ typ) inputs accepting AC-coupled signals; require matched external resistors for gain setting |
| OUT+ / OUT− | Differential Class-D Outputs | Capable of 30VPP swing into piezo loads; require external LC filter before speaker connection |
| VSET | Boost Output Voltage Selector | Three-state pin (GND/Floating/AVDD) selects 8V/12V/17.5V boost rail - directly sets max audio output capability |
| GSET | Amplifier Gain Selector | Three-state pin configures closed-loop gain (21/26/32.5dB); determines input sensitivity and headroom margin |
| COMP | Boost Converter Compensation | Connects to RC network (typically 10kΩ + 1nF) to stabilize boost loop; critical for transient response and efficiency |
| PGND1 / PGND2 | Separate Power Grounds | PGND1 for boost converter, PGND2 for Class-D stage - prevents switching noise injection into audio path |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Boost Converter | Generates 17.5V rail from 3.6V input using single external inductor - eliminates need for discrete DC-DC stage |
| Programmable Soft-Start | 40ms wake-up time on ENA assertion - prevents inrush current and pop-noise during power-up |
| Differential Output Architecture | Reduces common-mode noise and improves PSRR (70dB) - essential for clean audio in noisy digital environments |
| Triple Protection Scheme | Combines thermal shutdown (+150°C), short-circuit latch, and UVLO (2.2V) - ensures robust operation in unregulated battery systems |
| Space-Saving Packaging | W-QFN4040-16 footprint (4.0×4.0mm) with exposed thermal pad - supports thermal dissipation in <1mm height constraints |
Applications
| Wireless Handsets | Portable DVD Players |
|---|---|
|
Use Scenario: Driving piezo buzzer for call alerts and UI feedback in slim smartphone form factors. IC Role / Device Role / Timing Role: Mono Class-D amplifier with integrated boost - replaces discrete boost + amplifier solution. Use Value: Delivers 30VPP output from single-cell Li-ion (3.6V), eliminating need for external DC-DC and reducing BOM count by 4 components. |
Use Scenario: Audio playback through ceramic speaker in battery-powered portable DVD players. IC Role / Device Role / Timing Role: High-voltage audio driver with programmable gain - adapts to varying speaker impedance across product SKUs. Use Value: 26dB gain mode provides optimal SNR (90dB) and low THD+N (0.3%) at 5Vrms, meeting consumer audio quality benchmarks. |
| Electronic Dictionaries | Digital Still Cameras |
|
Use Scenario: Voice pronunciation playback in compact handheld dictionaries with limited PCB area. IC Role / Device Role / Timing Role: Low-quiescent-current audio amplifier (10–18mA typ) with shutdown mode (<1µA). Use Value: Extends battery life to >100 hours in standby while maintaining instant wake-up (<40ms) for voice prompts. |
Use Scenario: Shutter sound and menu navigation tones in DSLR/mirrorless cameras requiring zero EMI interference with image sensor. IC Role / Device Role / Timing Role: Differential Class-D output with separate PGND domains - isolates switching noise from analog sensor circuits. Use Value: Achieves >60dB CMRR and 70dB PSRR, preventing switching artifacts from corrupting image data acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mono Class-D piezo driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9717ETE+ | No integrated boost; requires external 12V supply; higher quiescent current (25mA typ) | Limited to systems with pre-regulated 12V rail; unsuitable for direct battery operation | Select when existing 12V supply is available and board space permits discrete boost stage |
| TAS5707PAG | Standalone Class-D amplifier (no boost); 24-bit I2S input; requires external DAC and regulator | Targeted at higher-fidelity stereo audio; incompatible with piezo-specific 30VPP drive requirement | Select only for multi-channel, digitally interfaced designs where piezo drive is not required |
Compared with MAX9717ETE+ and TAS5707PAG, the PAM8902HKER uniquely integrates boost conversion and piezo-optimized 30VPP output in a single 4×4mm package - reducing total solution size by 45% and eliminating external DC-DC design effort.
Availability
PAM8902HKER is available at Aetrix Electronics and suitable for wireless handsets, portable DVD players, and electronic dictionaries requiring stable component supply with guaranteed long-term manufacturability and automotive-grade traceability options.
Supply support for PAM8902HKER 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and ICs, specializing in power management, signal integrity, and precision analog solutions for consumer, industrial, and automotive markets.
The PAM8902HKER belongs to Diodes' Piezo/Ceramic Speaker Driver product line, engineered to replace electromechanical buzzers with high-efficiency, high-fidelity audio in ultra-thin portable devices where board space and battery life are critical.
FAQ
What is the recommended external inductor value for the PAM8902HKER boost converter?
Diodes specifies a 1.0µH inductor with 1.5A saturation current and ≤0.1Ω DC resistance for optimal efficiency and thermal performance at 1.5MHz switching. Inductor selection must meet ripple current rating under worst-case 5.5V input and 17.5V output conditions, and physical placement should minimize loop area between SW, PVCC, and PGND1 pins to reduce EMI.
How does the VSET pin configuration affect maximum audio output voltage?
VSET sets the boost rail: GND = 8V (→ 5Vrms/14.1VPP), Floating = 12V (→ 8Vrms/22.6VPP), AVDD = 17.5V (→ 11Vrms/31.1VPP). Since audio output scales linearly with boost voltage, selecting AVDD on VSET enables full 30VPP capability but increases power dissipation - use only when piezo load requires >22VPP swing.
Can the PAM8902HKER drive standard 8Ω dynamic speakers?
No - the PAM8902HKER is optimized for high-impedance (≥100nF capacitive) piezo/ceramic speakers, not low-impedance dynamic loads. Driving 8Ω speakers would exceed current limits, trigger short-circuit protection, and risk thermal damage due to mismatched output impedance and lack of current-sense feedback for resistive loads.
What decoupling capacitors are required on the AVDD and PVCC rails?
A 1µF X7R ceramic capacitor must be placed within 2mm of the AVDD pin for high-frequency noise suppression, and a 10µF or larger X5R/X7R ceramic capacitor is required near the PVCC input to stabilize the boost converter under dynamic load. Both capacitors must use low-ESR construction and connect directly to their respective ground planes (AGND for AVDD, PGND1 for PVCC).
PAM8902HKER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Class D
- Output Type:
- 1-Channel (Mono)
- Max Output Power x Channels @ Load:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Features:
- Short-Circuit and Thermal Protection
- Mounting Type:
- Surface Mount
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-QFN (4x4)
PAM8902HKER FAQ
1.How can I place an order for PAM8902HKER through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM8902HKER 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 PAM8902HKER reliable?
The price and inventory of PAM8902HKER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM8902HKER is usually 5 days.
3.What payment methods are accepted for PAM8902HKER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM8902HKER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM8902HKER?
PAM8902HKER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM8902HKER 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 PAM8902HKER?
For technical support, including PAM8902HKER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM8902HKER requirements.
6.How does Aetrix verify that PAM8902HKER is sourced from the original manufacturer or authorized distributors?
All PAM8902HKER 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 PAM8902HKER meets industry standards.
7.What is the process for return or replacement of PAM8902HKER?
All PAM8902HKER units undergo pre-shipment inspection (PSI). If there is an issue with PAM8902HKER, 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 PAM8902HKER part is unused and in its original packaging.
Return procedure for PAM8902HKER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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