Ordering number : EN5662 Monolithic Linear IC LA4592W 1.5-V Preamplifier + Power Amplifier for Headphone Stereo Products Overview The LA4592W is a single-chip 1.5-V headphone stereo system IC. The LA4592W adds a variety of functions, including a switch amplifier (for end product audio quality switches, the metal tape switch, and other switches) and an AMSS (Automatic Music Search System) function that supports blank skipping, to the earlier LA4590W. Furthermore, the LA4592W provides even lower no-signal time power levels for lower end-product power dissipation. In combination with the LA3235W 1.5-V record preamplifier IC, the LA4592W can be used to implement a record/playback cassette system with just two ICs. Functions • Stereo preamplifier: supports auto reverse and includes a muting function. • Stereo power amplifier: Includes OCL and muting functions. • Ripple filter • Low boost function (BTL operation in the lowfrequency region) • Inter-track detection function (Supports AMSS and blank skipping) • Two switching amplifiers • Power switch (standby function) Features • Virtual ground impedance is reduced by built-in VREF amplifier • No capacitor required for ripple filter oscillation prevention. • Provides ample output power at low frequencies. (PO = 24 mW, VCC = 1.2 V, f = 150 Hz) • High-frequency cutoff capacitors built into the preamplifier and power amplifier inputs to minimize buzzing. Allowable power dissipation, Pd max – W Package Dimensions unit: mm 3163A-SQFP48 [LA4592W] Ambient temperature, Ta – °C Specifications SANYO: SQFP48 Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Allowable power dissipation Symbol Conditions Ratings Unit VCC max 3.0 V Pd max 320 mW Operating temperature Topr –10 to +60 °C Storage temperature Tstg –40 to +125 °C Ratings Unit Allowable Operating Ranges at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Operating supply voltage range VCCop Conditions 1.5 V 0.95 to 2.2 V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 73097HA (OT) No. 5662-1/5 LA4592W Operating Characteristics at Ta = 25°C, VCC = 1.2 V, f = 1 kHz, 0.775 V = 0 dB, RL = 10 kΩ (preamplifier) RL = 16 Ω (power amplifier) Parameter Symbol Conditions Ratings min typ Unit max [PRE + PWR] Quiescent current Voltage gain (closed loop) [PRE AMP] Voltage gain (open loop) Voltage gain (closed loop) Maximum output voltage Total harmonic distortion Equivalent input noise voltage Interchannel crosstalk F/R crosstalk ICCO1 ICCO2 VGT Rg = 2.2 kΩ, RV = 0 Ω With the power switch off VO = –20 dBm, RV = 10 kΩ 8.5 60 34 100 Ripple rejection ratio Rr1 VO = –20dBm VO = –20dBm THD = 1 % VG = 35.3 dB/NAB, VO = 100 mV Rg = 2.2 kΩ, BPF = 20 Hz to 20 kHz Rg = 2.2 kΩ, TUNE 1 kHz, VO = –20 dBm Rg = 2.2 kΩ, TUNE 1 kHz, VO = –20 dBm Rg = 2.2 kΩ, Vr = –30 dBm, fr = 100 Hz, TUNE 100 Hz Muting output voltage VM1 VIN = –40 dBm, TUNR 1 kHz, With the muting function on VG0 VG1 VO max1 THD1 VN1 CT1 CT2 54 45 65 45 11 0.1 57 68 35.3 210 0.08 1.3 56 78 16 5 60 37 0.5 3.0 52 mA µA dB dB dB mV % µV dB dB dB –90 dBm 25.5 25.5 30.5 36 dB dB dB dB mW mW % dB µV [Low Boost + Power Amplifier] Rr2 VO = –20 dBm VO = –20 dBm, L.B = ON VO = –20 dBm, L.B = ON, f = 10 kHz VO = –20 dBm, L.B = ON, f = 100 Hz THD = 10 % THD = 10 %, f = 100 Hz, L.B = ON PO = 1 mW VO = –20 dBm, RV = 0 Ω RV = 0 Ω, BPF = 20 Hz to 20 kHz RV = 0 Ω, Vr = –30 dBm, fr = 100 Hz, TUNE 100 Hz Muting output voltage VM2 VIN = –30 dBm, TUNE 1 kHz, With the muting function on Input resistance Voltage gain difference [Ripple Filter] Ri ∆VG3 Ripple rejection ratio Rr3 Voltage gain (closed loop) Output voltage Total harmonic distortion Interchannel crosstalk Output noise voltage Ripple rejection ratio Output voltage [AMSS] VG3 VG4 VG5 VG6 PO1 PO2 THD2 CT3 VNO VRF 20.5 20.5 24.5 28 5 13 38 50 1.5 33 74 dB –90 8 fr = 100 Hz, Vr = –30 dBm, VCC = 1.0 V, IRF = 25 mA, using a rank 6 2SB1295 VCC = 1.0 V, IRF = 25 mA 23 23 27.5 32 9 19 0.3 43 20 33 10 0 12 1.5 dBm kΩ dB 39 dB 0.89 0.94 V Operating output voltage The preamplifier output voltage VOAMSS1 when the AMSS VO = 0.6 V p-o With the PWR muting on. (AMSS) 3.33 4.7 6.64 mV Operating output voltage The preamplifier output voltage VOAMSS2 when the AMSS VO = 0.6 V p-o With the PWR muting off. (BLANK SKIP) 479 675 953 µV Operating output voltage The preamplifier output voltage when the AMSS VO = 0.6 V p-o VOAMSS3 With pin 34 shorted through a 270-Ω resistor. With the PWR muting on. 2.62 3.7 5.23 mV Operating output voltage The preamplifier output voltage when the AMSS VO = 0.6 V p-o VOAMSS4 With pin 34 shorted through a 270-Ω resistor. With the PWR muting on. 375 530 749 µV VG7 VO max2 –1.2 25 –0.7 60 –0.2 dB mV –90 dBm [SW AMP] Voltage gain (closed loop) Maximum output voltage Ripple rejection ratio Rr4 Output voltage when off VM3 VO = –25 dBm THD = 1 % With the input pins open, Vr = –30 dBm, fr = 100 Hz, TUNE 100 Hz VIN = –20 dBm, TUNE 1 kHz, SW OFF 50 75 dB No. 5662-2/5 LA4592W AMSS Temperature Characteristics (Values for reference only) Parameter Symbol AMSS Conditions Ta VOAMSS1 The preamplifier output voltage when the AMSS VO = 0.6 V p-o With the PWR muting on. (AMSS) Ratings min typ Unit max –10 25 50 °C 3.9 4.7 5.4 mV 605 675 735 µV Operating output voltage VOAMSS2 The preamplifier output voltage when the AMSS VO = 0.6 V p-o Bias Ripple filter System control Block Diagram No. 5662-3/5 LA4592W Bias Ripple filter System control Test Circuit Diagram No. 5662-4/5 LA4592W Bias Ripple filter System control Sample Application Circuit *: Adjust the values of the capacitors marked with an asterisk to match the timing required by the end product. ■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: ➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. ■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of July, 1997. Specifications and information herein are subject to change without notice. No. 5662-5/5