SSM2335: Filterless, High Efficiency, Mono 3 W Class-D Audio Amplifier |
The SSM2335 is a fully integrated, high efficiency, Class-D audio amplifier. It is designed to maximize performance for mobile phone applications. The application circuit requires a minimum of external components and operates from a single 2.5 V to 5.5 V supply. It is capable of delivering 3 W of continuous output power with <1% THD + N driving a 3 Ω load from a 5.0 V supply.
The SSM2335 ...More
The SSM2335 is a fully integrated, high efficiency, Class-D audio amplifier. It is designed to maximize performance for mobile phone applications. The application circuit requires a minimum of external components and operates from a single 2.5 V to 5.5 V supply. It is capable of delivering 3 W of continuous output power with <1% THD + N driving a 3 Ω load from a 5.0 V supply.
The SSM2335 features a high efficiency, low noise modulation scheme that requires no external LC output filters. The modu-lation continues to provide high efficiency even at low output power. It operates with 93% efficiency at 1.4 W into 8 Ω or 85% efficiency at 3 W into 3 Ω from a 5.0 V supply and has an SNR of >96 dB. Spread-spectrum pulse density modulation is used to provide lower EMI-radiated emissions compared with other Class-D architectures.
The SSM2335 has a micropower shutdown mode with a typical shutdown current of 20 nA. Shutdown is enabled by applying a logic low to the SD pin.
The device also includes pop-and-click suppression circuitry. This suppression circuitry minimizes voltage glitches at the output during turn-on and turn-off, reducing audible noise on activation and deactivation.
The fully differential input of the SSM2335 provides excellent rejection of common-mode noise on the input. Input coupling capacitors can be omitted if the input dc common-mode voltage is approximately VDD/2.
The default gain of the SSM2335 is 18 dB, but users can reduce the gain by using a pair of external resistors (see the Gain section).
The SSM2335 is specified over the industrial temperature range of −40°C to +85°C. It has built-in thermal shutdown and output short-circuit protection. It is available in a 9-ball, 1.5 mm × 1.5 mm wafer level chip scale package (WLCSP).
Applications
| Part# | Output Power (W) | Efficiency (%) | Dynamic Range (dB) | SNR (dB) | THD+N (dB) | Pos Supply | Supply Current | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|
| AD1990 | 5 | 84 | 102 | 102 | -90 | +8V to +12V | 30mA | - |
| ADAU1513 | 23 | 90 | 96 | 96 | - | +9V to +18V | 40mA | $2.15 |
| ADAU1590 | 15.5 | 90 | 101 | 101 | - | +9V to +15V | 65mA | $2.24 |
| ADAU1592 | 18 | 87 | 101 | 101 | -85 | +9V to +18V | 44mA | $2.37 |
| SSM2301 | 1.4 | 85 | - | 98 | - | +2.5V to +5V | 4.2mA | $0.45 |
| SSM2302 | 2 | 85 | - | 98 | -67 | +2.5V to +5V | - | $0.92 |
| SSM2304 | 2 | 85 | - | 102 | -67 | +2.5V to +5V | 7mA | $0.81 |
| SSM2305 | 2.8 | 89 | - | 98 | +-94 | +2.5V to +5.5V | 3.3mA | $0.60 |
| SSM2306 | 2 | 87 | - | 96 | - | +2.5V to +5V | 6.5mA | $0.99 |
| SSM2311 | 3 | 85 | - | 98 | -67 | +2.5V to +5.5V | 4.2mA | $0.73 |
| SSM2315 | 3 | 93 | - | 103 | - | +2.5V to +5.5V | 3.3mA | $0.82 |
| SSM2317 | 3 | 93 | - | 93 | - | +2.5V to +5.5V | 4.07mA | $0.91 |
| SSM2319 | 3 | 90 | - | 98 | - | +2.5V to +5.5V | 3.7mA | $0.90 |
| SSM2335 | 3 | 93 | - | 96 | - | +2.5V to +5.5V | 3.63mA | $0.63 |
* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S.
Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.
*这里所列出的美国报价单仅供预算参考，指美元报价（规定订量的每片美元，美国离岸价），如有修改不再另行通知。由于地区关税、商业税、汇率及手续费原因，国际报价可能不同。对于特殊批量报价，请与您当地的ADI公司办事处或代理商联络。对于评估板和套件的报价是指一个单位价格。
**样片供货情况可能好于生产供货，请将样片放入购物车，以查看样片供货情况。
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