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CM8600
3 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
General Description
The CM8600 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.25 watts of continuous average power to an 8 BTL load and 2 watts of continuous average power (LD and MH only) to a 4ΩBTL load with less than 1% distortion (THD+N+N) from a 5.5V DC power supp ly. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The CM8600 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage appli- cations where minimal power consumption is a primary requirement. The CM8600 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low enables the shutdown pin to be driven in a likewise manner to enable shutdown. The CM8600 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turnon and turn-off transitions. The CM8600 is unity-gain stable and can be configured by external gain-setting resistors.
Key Specifications
Ø Ø Improved PSRR at 217Hz & 1KHz Power Output at 5.0V, 1% THD+N, 4Ω (LD and MH only) 62dB Ø Ø 3W (typ) Ø Power Output at 3.0V, 1% THD+N, 4Ω 600mW (typ) Power Output at 3.0V, 1% THD+N, 8Ω 425mW (typ) Shutdown Current 0.1µA (typ)
Ø
Power Output at 5.0V, 1% THD+N, 8Ω 1.25W (typ) Ø Ø Ø Ø
Features
Available in space-saving packages:SOP-8 Ø Ø Ø Ø Ø Ultra low current shutdown mode Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions 1.8 - 8.0V operation No output coupling capacitors, snubber networks or bootstrap capacitors required Unity-gain stable External gain configuration capability User selectable shutdown High or Low logic Level
Applications
Mobile Phones PDAs SOP-8
Ø
Portable electronic device
Connection Diagrams
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Free Datasheet http://www.Datasheet4U.com
Package Shutdown Mode Typical Power Output at 5V,1% THD+N LD Selectable 3W (RL = 4Ω) MH Selectable 3W (RL = 4Ω) MM Low 1.25W (RL = 8Ω)
CM8600
ITL Low 1.25W (RL = 8Ω)
. A SD_MODE select pin determines the Shutdown Mode for the LD and MH packages, whether it is an Asserted High or an Asserted Low device, to activate shutdown. . The SD_MODE select pin is not available with the MM and ITL packaged devices. Shutdown occurs only with a low assertion.
Typical Application
Note: MM and ITL packaged devices are active low only; Shutdown Mode pin is internally tied to GND. FIGURE 1. Typical Audio Amplifier Application Circuit (LD and MH) Absolute Maximum Ratings (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (Note 11) 6.0V Storage Temperature −65°C to +150°C Input Voltage −0.3V to VDD +0.3V Power Dissipation (Notes 3, 12) Internally Limited ESD Susceptibility (Note 4) 2000V ESD Susceptibility (Note 5) 200V Junction Temperature 150°C Thermal Resistance θJC (MSOP) 56°C/W θJA (MSOP) 190°C/W θJA (9 Bump micro SMD) (Note 15) 180°C/W
2 16
FreeDatasheethttp://www.Datasheet4U.com
θJA (LLP) θJC (LLP) Soldering Information See AN-1187 "Leadless Leadframe Package (LLP)."
CM8600
63°C/W (Note 13) 12°C/W (Note 13)
Operating Ratings
Temperature Range TMIN ≤ TA ≤ TMAX Supply Voltage −40°C ≤ TA ≤ 85°C 2.2V ≤ VDD ≤ 5.5V
Electrical Characteristics VDD = 5V (Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for TA = 25°C.
Symbol
Parameter
Conditions VIN=0V, IO=0A, No Load VIN=0V, IO=0A, 8Ω Load VSD=VSD Mode (Note 8) VSD MODE=VDD VSD MODE=VDD VSD MODE=GND VSD MODE=GND
IDD ISD VSDIH VSDIL VSDIH VSDIL VOS ROUT PO TWU THD+N+N PSRR
Quiescent power supply current Shutdown current Shutdown voltage input high Shutdown voltage input low Shutdown voltage input high Shutdown voltage input low Output offset voltage Resistor output to GND (Note 10) Output power (8Ω) (4Ω) (Note 13, 14) Wake-up time Total harmonic distortion + Noise Power supply rejection ratio
THD+N=1%(max); f=1KHz THD+N=1%(max); f=1KHz PO=0.5Wrms; f=1KHz Vripple=200mV sine p-p Input terminated with 10Ω
CM8601 Typical Limit (Note 6) (Notes7, 9) 3 7 4 10 0.1 2.0 1.5 -1.3 -1.5 -1.3 -7 50 9.7 8.5 7.0 1.25 0.9 3 -100 -0.2 -60 (f=217Hz) 55 64 (f=1KHz)
Units (Limits) mA(max) mA(max) uA(max) V V V V mV(max) KΩ(max) KΩ(min) W(min) W ms % dB(min)
Electrical Characteristics VDD = 3V (Notes 1, 2)
Symbol IDD ISD VSDIH VSDIL Parameter Quiescent power supply current Shutdown current Shutdown voltage input high Shutdown voltage input low
The following specifications apply for the circuit shown in Figure 1, u.