Ordering number : ENA1468D LV49821VH Bi-CMOS IC For Portable Electronic Device Use 1.4W × 2ch BTL Power Amplifier http://onsemi.com Overview The LV49821VH incorporates a 2-channel power circuit amplifier capable of low-voltage operation (2.7V and up). It has a function for switching the headphone driver and also has a standby function to reduce the current drain. It is a power amplifier IC optimal for driving the speakers used in portable equipment and low power output equipment. Use • Portable DVD-player, Note PC, Portable TV, LCD monitor, Active speaker, and more. Features • 2-cannels BTL power amplifier built-in: Standard output power = 1.4W (VCC = 5V, RL = 8Ω, THD = 10%) Output coupling capacitor is unnecessary because of differential output type. • Standby function built-in: Standard standby current = 0.01μA (VCC = 5V) • Second amplifier stop control function built-in: Headphone driver switch (for BTL/SE switch) Audio mute (Only BTL power amplifier path) • Supports beep signal input • Thermal protection circuit built-in • Operation at low voltage possible: VCC = 2.7V to 5.5V • Gain setting possible: BTL voltage gain = 0 to 26dB Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Maximum supply voltage VCC max Allowable power dissipation Pd max Maximum junction temperature Tj max Operating temperature Strage temperature Conditions Ratings Unit 6 Mounted on a specified board.* V 1.5 W 150 °C Topr -30 to +75 °C Tstg -40 to +150 °C * Specified board (Our company Evaluation board): 70mm × 70mm × 1.6mm, glass epoxy both side. Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Semiconductor Components Industries, LLC, 2013 May, 2013 60911 SY/81810 SY / 60110 SY 20100528-S00002/41610 SY / 52009 MS No.A1468-1/15 LV49821VH Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Recommended load resistance RL Operation supply voltage range VCC op1 VCC op2 Conditions Ratings Unit 5 V 4 to 32 Ω RL = 8Ω or more 2.7 to 5.5 V RL = 4Ω or 6Ω 2.7 to 3.7 V Note : Please determine supply voltage used with due consideration of allowable power dissipation. Electrical Characteristics at Ta = 25°C, VCC = 5V, fin = 1kHz, RL = 8Ω, V2 = high, V6 = Low Ratings Parameter Symbol Conditions Unit min Quiescent current ICCOP1 No signal, RL = ∞ typ max 7.1 ICCOP2 No signal, RL = ∞,V6 = High (2nd amplifier stop) Standby current ISTBY No signal, RL = ∞,V2 = Low (Standby mode) Maximum output power PO max THD = 10% 0.91 1.4 Voltage gain VG Vin = -25dBV 17.6 19.1 Voltage gain difference VGR Channel balance CHB 13 mA 4.0 mA 0.01 W 20.6 dB 26 dB +1.5 dB 0 Vin = -25dBV -1.5 0 Total harmonic distortion THD Vin = -25dBV 0.3 1 Output noise voltage VNO Rg = 620Ω, 20 to 20kHz 35 100 Channel separation CHsep Vout = -25dBv, 20 to 20kHz Output offset voltage VDCOS Rg = 620Ω Muting attenuation level MUTE1 Vin = 0dBV, V2 = Low (Standby mode) MUTE2 Vin = -10dBV,V6 = High (2nd amplifier stop) Ripple rejection ratio SVRR Rg = 620Ω, fr = 100Hz, Vr = -20dBV Reference Voltage (pin 4) Vref High level control voltage (pin 2) VSTBH Power amplifier operation mode Low level control voltage (pin 2) VSTBL Power amplifier standby mode High level control voltage (pin 6) V2CNTH 2nd amplifier standby mode (SE mode) Low level control voltage (pin 6) V2CNTH 2nd amplifier operation mode (BTL mode) 50 μA 10 % μVrms 60 -30 dB +30 mV -110 dBV -85 dBV 35 dB 2.5 V 1.6 VCC V 0 0.3 V 4VCC/5 VCC V 0 VCC/2 V Package Dimensions unit : mm (typ) 3377 1.3 0.5 6.4 4.4 13 1 2 0.22 0.15 1.5 MAX 1.5 With specified board Specified board: 70×70×1.6mm3 glass epoxy both side 1.2 0.9 0.8 0.4 Independent IC 0.3 0.18 0 -30 -20 0 20 40 60 80 100 Ambient temperature, Ta -- C 0.1 (1.3) (0.33) Allowable power dissipation, Pd max -- W 1.5 0.65 Pd max -- Ta 1.6 5.2 SANYO : HSSOP13(225mil) No.A1468-2/15 LV49821VH Block Diagram VCC 11 OUT2-1 9 TSD 1st-amp OUT2-2 10 2st-amp PWR-GND Rariator Fin 2st-amp OUT1-2 12 1st-amp OUT1-1 13 VCC BIAS control 1 IN1 2 STBY 2nd-amp control 3 BEEP 4 VREF 5 PRE-GND 6 A2CNT 7 NC 8 IN2 Test Circuit VCC GND 2.2μF + 0.1μF 8Ω 13 12 1 2 8Ω Rariator Fin PWR-GND 3 4 PRE-GND 5 11 VCC 10 9 6 7 8 100kΩ 100kΩ 47nF 0.1μF 22kΩ STBY 1μF 22kΩ PWR BTL 0.1μF SE 1.55V 120kΩ 0.35V 620Ω Vin1 620Ω Vin3 100kΩ 330kΩ 100kΩ 620Ω Vin2 No.A1468-3/15 LV49821VH Evaluation Board Circuit OUT1-1 OUT1-2 VCC GND OUT2-2 OUT2-1 SE1 SE2 + + + 13 12 1 2 Rariator Fin PWR-GND 3 PWR 10 9 6 7 8 PRE-GND 5 no use STBY use 4 11 VCC SE BTL 22nF from VCC IN1 (beep in) STBY IN3 from VCC A2CNT IN2 Evaluation Board Layout (70mm × 70mm × 1.6mm) Top layer Bottom Layer No.A1468-4/15 LV49821VH Application Circuit Example 1 (BTL/SE switching function use) VCC Speaker Speaker + + + 13 12 1 2 Rariator Fin PWR-GND 3 4 11 VCC 10 9 6 7 8 PRE-GND 5 C4 10nF Vin1 from CPU Vin2 from CPU Application Circuit Example 2 (Only BTL function use) Speaker VCC Speaker C7 2.2μF + C8 0.1μF R2 100kΩ 13 12 1 2 R1 22kΩ 3 4 PRE-GND 5 R5 10kΩ C3 1μF C1 0.1μF Vin1 Rariator Fin PWR-GND 11 VCC 10 9 6 7 8 R3 22kΩ R4 100kΩ C2 0.1μF from CPU Vin2 No.A1468-5/15 LV49821VH Pin Function Pin No. Pin name Pin voltage VCC =5V Function 1 IN1 2.5V Power amplifier input pin (1ch). 8 IN2 2.5V Power amplifier input pin (2ch). Equivalent circuit VCC VCC 8 1 VREF2 GND 2 STBY External apply Standby control pin. VCC VCC • Standby mode (0 to 0.3V) • Operation mode (1.6V to VCC) 30kΩ BIAS 100kΩ 2 GND 2.5V Beep signal input pin. VREF 2.5V Reference voltage pin. VCC VREF2 3 VCC VREF 100kΩ BEEP 4 50kΩ 4 450kΩ 100kΩ 3 GND 5 PRE-GND 6 A2CNT 0V External apply Pre-stage block ground pin 2nd amplifier stop control pin. VCC 50kΩ VCC 100kΩ 6 GND − 7 NC 9 OUT2-1 2.5V Unused pin. BTL 1st output pin (2ch). 13 OUT1-1 2.5V BTL 1st output pin (1ch). VCC VCC VREF2 9 13 30kΩ 15kΩ GND 10 OUT2-2 2.5V BTL 2nd output pin (2ch). 12 OUT1-2 2.5V BTL 2nd output pin (1ch). VCC VCC VREF 10 12 GND 11 VCC FIN PWR-GND External apply 0V Power supply pin. Power system ground pin, Radiation fin. No.A1468-6/15 LV49821VH Usage Note 1. Input coupling capacitor (C1 and C2) C1 and C2 are input coupling capacitors that are used to cut the DC component. The input coupling capacitors C1, C2 and the input resistors R1 and R3 make up the high-pass filter, attenuating the bass frequency. Therefore, the capacitance value must be selected with due consideration of the cut-off frequency. The cut-off frequencies are expressed by the following formulas. 1ch fc1 = 1/(2π × C1 × R1) 2ch fc2 = 1/(2π × C2 × R3) This capacitor affects the pop sound at startup. Note with care that increasing the capacitance value lengthens the charging time of the capacitor, which will make the pop sound louder. 2. BTL voltage gain The voltage gain of the first amplifier is determined by the ratio between the resistors R1 and R2 (R3 and R4). 1ch Vg1 = 20 × log(R2/R1) …unit: dB 2ch Vg2 = 20 × log(R4/R3) … unit: dB Therefore, the BTL voltage gain is expressed by the following formulas. 1ch VgBTL1 = 6 + 20 × log(R2/R1) … unit: dB 2ch VgBTL2 = 6 + 20 × log(R4/R3) … unit: dB The BTL voltage gain must be set in the range of 0 to 26 dB. 3. Beep signal input pin (pin 3) This pin is connected to the non-inverting input block of the first amplifier of the BTL amplifier, and is biased internally by a 50kΩ resistor. The input coupling capacitor C4 and the bias resistor make up a high-pass filter that attenuates bass band signals, so when determining the C4 capacitance value, the value must be set with due consideration of the cut-off frequency. The cut-off frequency is expressed by the following formula. fc3 = 1/(2π× C4 × 50000) In addition, when input from Pin 3, the BTL voltage gain is expressed by the following formulas. 1ch VgBTL1 = 6 + 20 × log(1+R2/(R1 + ro)) … unit: dB 2ch VgBTL2 = 6 + 20 × log(1+R4/(R3 + ro)) … unit: dB When setting the signal level, the signal should be attenuated and input as shown in Fig.1. When not using this input pin, connect it to pin 4 as shown in Application Circuit Example-2. LV49821VH other IC OUT ro 13 C1 R2 1 R1 C4 3 4 Beep signal in VREF C3 Fig.1 4. pin 4 capacitor (C3) This capacitor is a ripple filter capacitor. The internal resistors (100kΩ + 450kΩ) and C3 make up a low-pass filter that is used to reduce the power supply ripple component and increase the ripple rejection ratio. Note that inside the IC, the rising-transient-response-characteristic of the pin 4 voltage (reference voltage) is used to activate the automatic pop sound reduction circuit. Therefore, when reducing the C3 capacitance value to increase the voltage rise speed, the design should take into account that the pop sound increases during voltage rise. 5. Power supply line capacitor (C7and C8) The bypass capacitor C8 is used to remove the high frequency component that cannot be eliminated by the power supply capacitor C7 (chemical capacitor). Place the bypass capacitor C8 as near to the IC as possible, and use a ceramic capacitor with good high frequency characteristics. When using a stabilized power supply, these capacitors can also be combined into a single 2.2μF ceramic capacitor. Note that when the power supply line is relatively unstable, the power supply capacitor C7 capacitance value must be increased. No.A1468-7/15 LV49821VH 6. Standby pin (pin 2) By controlling the standby pin, the mode changeover can be made between standby and operation modes. Direct control is possible using the CPU output port, but inserting a series resistor R5 (1 kΩ or more) is recommended in case the pin is affected by digital noise from the CPU. Standby mode … V2 = 0V to 0.3V 11 VCC Operating mode…V2 = 1.6V to VCC In addition, when not using standby mode, this pin can also be used interlocked VCC 2 STBY R5 with the power supply as shown in Fig. 2. The series resistor R5 can be eliminated, but the current I2 expressed by the following formula flows through the standby pin, so this should be taken into account in the design. Fig.2 Pin 2 inflow current (unit: A): I2 = 7 × 10-6 + (VCC − 0.7) / (R5 + 30000) 7. Pin 6 control (2nd amplifier stop control function) Pin 6 performs on/off control for the BTL amplifier’s second amplifier operation. This function enables switching between speaker drive (BTL output system) and headphone drive (single end output system). The control comparator is connected to this pin, and this threshold voltage is generated by resistance division from the supply voltage. For this reason, care should be taken, as the threshold value varies according to the supply voltage. When switching using a headphone jack switch, the connection method shown in Application Circuit Example-1 is recommended. Comparator threshold value: Vth = VCC × 2/3 In addition, when controlling this pin with the CPU (BTL amplifier mute function), care should be taken for the relationship between the supply voltage used by the CPU and the supply voltage used by the power amplifier IC. When the supply voltage used by the power amplifier IC is higher, open/low format control as shown in Fig.3 and Fig.4 is recommended. In addition, there is also a control method that uses three resistors as shown in Fig.5. The recommended ratio between the resistance values of these three resistors is as follows. RC1, RC2, RC3 resistance ratio … RC1 : RC2 : RC3 = 1 : 1 : 3 11 VDD VCC 6 A2CNT VCC CPU 11 VDD VCC 6 A2CNT I/O port CPU VCC I/O port I/O port CPU VCC RC1 RC2 11 VCC 6 A2CNT RC3 LV49821VH VSS Figure 3 LV49821VH VSS Figure 4 LV49821VH VSS Figure 5 8. Headphone drive When also using the BTL amplifier’s first amplifier as the headphone amplifier, it is recommended to adjust the level by inserting series resistors R6 and R8 to the signal line as shown in Application Circuit Example-1. Note that this series resistor, the headphone load resistance and the output coupling capacitors C5 and C6 make up a high-pass filter, so this should be taken into account in the design. The cut-off frequencies are expressed by the following formulas. 1ch fc1 = 1 / (2π × C5 × (R6 + RL)) 2ch fc2 = 1 / (2π × C6 × (R8 + RL)) 9. Load capacitance When connecting a capacitor between the output pin and ground to suppress electromagnetic radiation or other purposes, the effects of this capacitor may cause the power amplifier phase margin to be reduced, resulting in oscillation. When adding this capacitor, care should be taken for the capacitance value. Recommended capacitance value: 0.033μF to 0.33μF 10. Thermal protection circuit The IC has a built-in thermal protection circuit that can reduce the risk of breakdown or degradation when the IC becomes abnormally hot for some reason. When the internal chip junction temperature Tj rises to approximately 170° C, this protective circuit operates to cut off the power supply to the power amplifier block and stop signal output. Operation recovers automatically when the chip temperature drops to approximately 130°C. Note that this circuit cannot always prevent breakdown or degradation, so sufficient care should be taken for using the IC. When the chip becomes abnormally hot, immediately turn off the power and determine the cause. No.A1468-8/15 LV49821VH 11. Short-circuit between pins Turning on the power supply with the short-circuit between terminals leads to the deterioration and destruction of IC. When fixing the IC to the substrate, please check that the solder is not short-circuited between the terminals before turning on the power. 12. Load Short-circuit Leaving the IC in the load short-circuit for many hours leads to the deterioration and destruction of the IC. The load must not be short-circuited absolutely. 13. Maximum rating When the rated value used is just below to the absolute maximum ratings value, there is a possibility to exceed the maximum rating value with slight extrusion variable. Also, it can be a destructive accident. Please use within the absolute maximum ratings with sufficient variation margin of supply voltage. In addition, the package of this IC has low thermal radiation characteristics, so secure sufficient thermal radiation by providing a copper foil land on the printed circuit board near the heat sink. When VCC = 5V and load = 8Ω, a ground line copper foil area of approximately 50mm × 50mm is recommended. No.A1468-9/15 10 7 5 3 2 1 7 5 3 2 0.1 0.01 2 3 5 7 0.1 2 3 5 7 2 1 3 THD -- PO 10 7 5 3 2 1 7 5 3 2 0.1 0.01 5 7 10 2 3 5 7 0.1 Output power, PO --W 7 Total harmonic distortion, THD -- % 5 3 2 1 7 dB 3 19.1dB 2 0.1 10 5dB 6 =2 VG 5 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 5 1 7 5 RL = 16Ω 3 8Ω 2 10 2 3 5 7 100 Output power, PO --W Output power, PO --W 5 7 1k 2 3 5 7 10k 2 3 5 7 10k PO -- VCC 8Ω 16Ω 0.5 3.5 4.0 4.5 5.0 1.5 1.0 =4 RL 8Ω 16Ω 0 2.5 5.5 3.0 20 Voltage gain, VG -- dB 3 2 TH 1 10 % 7 1% 5 4.0 4.5 5.0 5.5 VG -- f 24 VCC = 5V PG = 19.1dB fin = 1kHz D= 3.5 Supply voltage, VCC -- V PO -- RL 10 Ω 0.5 Supply voltage, VCC -- V Output power, PO --W 2 3 2.0 Ω 5 5 7 10 THD = 1% VG = 19.1dB f = 1kHz =4 RL 7 3 Frequency, f -- Hz 1.5 3.0 2 2 THD = 10% VG = 19.1dB f = 1kHz 0 2.5 1 3 0.1 5 7 10k PO -- VCC 1.0 5 7 VCC = 5V PO = 200mW Frequency, f -- Hz 2.0 3 THD -- f 10 VCC = 5V PO = 200mW RL = 8Ω 12. Total harmonic distortion, THD -- % 7 2 Output power, PO --W THD -- f 10 8Ω 3 2 6Ω VCC = 3.3V VG = 19.1dB fin = 1kHz 4Ω 100 7 5 R L =1 Total harmonic distortion, THD -- % 6Ω 3 2 THD -- PO VCC = 5V VG = 19.1dB fin = 1kHz 8Ω 100 7 5 R L =1 Total harmonic distortion, THD -- % LV49821VH VCC = 5V RL = 8Ω Cin = 0.1μF 16 12 3 8 2 0.1 1 2 3 5 7 10 2 Load resistance, RL -- Ω 3 5 7 100 4 10 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 5 7100k Frequency, f -- Hz No.A1468-10/15 LV49821VH ICC -- PO 1.0 Power dissipation, Pd -- W Current drain, ICC -- A VCC = 5V VG = 19.1dB fin = 1kHz VCC = 5V VG = 19.1dB fin = 1kHz 0.8 Pd -- PO 2.0 0.6 Ω =8 Ω L R 16 0.4 1.5 =8 RL 1.0 Ω 16Ω 0.5 0.2 3 5 7 0.1 2 3 5 7 2 1 3 0 0.01 5 7 10 2 3 5 7 0.1 Output power, PO -- W/ch Pd -- PO 2.0 Power dissipation, Pd -- W Power dissipation, Pd -- W V =5 C 2V V C 4. V 3.6 0.5 2 3 5 7 0.1 2 3 5 7 2 1 3 V 1.0 2 3 5 7 0.1 Channel separation, CHsep -- dB Noise voltage, VNO -- μVrms 3 5 7 10 40 30 3.5 4.0 4.5 5.0 5.5 = V6 4V ( C A2 STBY (V2 = 0.3V) -120 -20 Input voltage, Vin -- dBV 1 ch2 → ch1 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 5 7100k MUTE -- f -10 0 (V -90 VCC = 5V RL = 8Ω Vin = -10dBV VG = 19.1dB A2 CN T MUTE attenuation level, MUTE -- dBV ) -30 5 7 VCC = 5V RL = 8Ω Rg = 620Ω VG = 19.1dB VO = 1Vrms -80 -100 -110 3 Frequency, f -- Hz VCC = 5V RL = 8Ω fin = 1kHz VG = 19.1dB NT 2 ch1 → ch2 4 10 6.0 MUTE -- Vin -80 3V CHsep -- f Supply voltage, VCC -- V MUTE attenuation level, MUTE -- dBV 2 =3 CC Output power, PO -- W/ch 50 -130 -40 5 7 10 0.5 0 0.01 5 7 10 RL = 8Ω Rg = 6208Ω Din Audio Filter -90 3 .6V VNO -- VCC 60 3.0 2 1 1.5 Output power, PO -- W/ch 20 2.5 5 7 RL = 4Ω VG = 19.1dB fin = 1kHz 1.5 0 0.01 3 Pd -- PO 2.0 RL = 8Ω VG = 19.1dB fin = 1kHz 1.0 2 Output power, PO -- W/ch 4V ) 2 6= 0 0.01 -100 -110 STBY (V2 = 0.3V) -120 -130 10 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 5 7100k Frequency, f -- Hz No.A1468-11/15 LV49821VH SVRR -- f VCC = 5V RL = 8Ω Rg = 620Ω VG = 19.1dB Vr = -20dBV Cref = 1μF 60 50 40 30 20 10 10 2 3 5 7 100 2 3 5 7 1k SVRR -- Cref 70 Ripple rejection ratio, SVRR -- dB Ripple rejection ratio, SVRR -- dB 70 2 3 5 7 10k 2 3 VCC = 5V RL = 8Ω Rg = 620Ω VG = 19.1dB Vr = −20dBV 60 50 40 30 20 10 0.1 5 7100k 2 3 5 7 1 2 3 5 Capacitance, Cref -- μF Frequency, f -- Hz 7 10 tr -- Cref 10 7 5 VCC = 5V RL = 8Ω Rise time, tr -- sec 3 2 1 7 5 3 2 0.1 7 5 3 2 0.01 0.1 2 3 5 7 1 2 3 5 7 Capacitance, Cref -- μF 10 ICCO -- VCC 10 ISTBY -- VCC 0.05 No load V2 = 0.3V 8 Stnadby current, ISTBY -- μA Quiescent current, ICCO -- mA No load de L mo BT 6 SE mode 4 2 0 0 1 2 3 4 5 0.04 0.03 0.02 0.01 0 6 0 1 ICCO -- V2 10 Quiescent current, ICCO -- mA Quiescent current, ICCO -- mA 6 4 2 0.5 4 5 6 5 6 No load 8 0 3 ICCO -- V6 10 No load 0 2 Supply voltage, VCC -- V Supply voltage, VCC -- V 1.0 1.5 2.0 2pin voltage, V2 -- V 2.5 3.0 8 6 4 2 0 0 1 2 3 4 6pin voltage, V6 -- V No.A1468-12/15 THD -- PO 100 7 5 VCC = 5V RL = 8Ω VG = 19.1dB fin = 1kHz 3 2 10 7 5 3 2 1 7 5 40°C Ta = 85°C 25°C 3 2 0.1 0.01 2 3 5 7 0.1 2 3 5 7 ICCO -- VCC 10 Quiescent current, ICCO -- mA Total harmonic distortion, THD -- % LV49821VH 2 1 3 8 5°C Ta = 8 25°C -40°C 6 4 2 0 5 7 10 No load 0 1 2 Output power, PO --W PO -- Ta 2.0 4 5 6 VG -- Ta 21 VCC = 5V RL = 8Ω VG = 19.1dB fin = 1kHz Voltage gain, VG -- dB Output power, PO --W 1.8 3 Supply voltage, VCC -- V 1.6 THD = 10% 1.4 20 VCC = 5V RL = 8Ω VG = 19.1dB fin = 1kHz Vin = -25dB BTL mode 19 1.2 1% 1.0 -40 -20 0 20 40 60 80 18 -40 100 -20 Ambient temperature, Ta -- °C VNO -- Ta 60 50 40 30 20 -40 -20 0 20 40 60 80 90 MUTE -- Ta -110 -120 0 20 40 60 Ambient temperature, Ta -- °C 100 80 100 80 100 70 -20 0 20 40 60 MUTE -- Ta -60 -100 -20 80 Ambient temperature, Ta -- °C VCC = 5V RL = 8Ω fin = 1kHz VG = 19.1dB V2 = 0.3V Stabdby mode -130 -40 60 80 60 -40 100 MUTE attenuation level, MUTE -- dBV MUTE attenuation level, MUTE -- dBV -90 40 VCC = 5V RL = 8Ω VG = 19.1dB fin = 1kHz VO = -25dB Ambient temperature, Ta -- °C -80 20 CHsep -- Ta 100 VCC = 5V RL = 8Ω Rg = 620Ω VG = 19.1dB Channel separation, CHsep -- dB Noise voltage, VNO -- μVrms 70 0 Ambient temperature, Ta -- °C 80 100 -70 -80 VCC = 5V RL = 8Ω fin = 1kHz VG = 19.1dB V6 = 4V 2nd amplifier power down mode -90 -100 -110 -120 -40 -20 0 20 40 60 Ambient temperature, Ta -- °C No.A1468-13/15 LV49821VH ICCO -- Ta Quiescent current, ICCO -- mA 10 ISTBY -- Ta 1 7 5 3 2 8 BTL mode 0.1 7 5 3 2 6 0.01 7 5 3 2 SE mode 4 0.001 7 5 3 2 2 0 -40 -20 0 20 40 60 80 100 0.0001 -40 -20 Ambient temperature, Ta -- C V2th -- Ta 0.9 0.8 0.7 0.6 -40 -20 0 20 40 60 20 40 60 80 100 80 100 V6th -- Ta 3.6 6pin threshold voltage, V6th -- V 2pin threshold voltage, V2th -- V 1.0 0 Ambient temperature, Ta -- C 80 100 3.5 3.4 3.3 3.2 -40 -20 0 20 40 60 Ambient temperature, Ta -- C Ambient temperature, Ta -- C Standby Power ON Power ON BTL OUT: 50mV/div, AC Standby BTL OUT: 50mV/div, AC 4pin voltage: 2V/div 4pin voltage: 2V/div 2pin voltage: 2V/div 2pin voltage: 2V/div t -- ms 100ms/div 6pin: High t -- ms Low 100ms/div 6pin: Low High BTL OUT: 50mV/div, AC BTL OUT: 50mV/div, AC 4pin voltage: 2V/div 4pin voltage: 2V/div 6pin voltage: 5V/div 6pin voltage: 5V/div t -- ms 10ms/div t -- ms 10ms/div No.A1468-14/15 LV49821VH ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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