LA4708N. Specifications. Monolithic Linear IC 20W 2-channel BTL AF Power Amplifier for Car Stereo. Maximum Ratings at Ta = 25 C SIP18H

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1 Ordering number : ENA18A LA8N Monolithic Linear IC W -channel BTL AF Power Amplifier for Car Stereo Overview The LA8N is a BTL two-channel power IC for car audio developed in pursuit of excellent sound quality. Low-region frequency characteristics have been improved through the use of a new NF capacitor-less circuit, and crosstalk which causes muddy sound has been reduced by improving both circuit and pattern layout. As a result, the LA8N provides powerful bass and clear treble. In addition, the LA8N features on-chip protectors and standby switch. Features High power : supports total output of W W (VCC = 1.V, THD = %, RL = ) Supports RL = (PO = W when VCC = 1.V, THD = 1%) Designed for excellent sound quality (fl 1Hz, fh = 1kHz) NF capacitor-less Any on time settable by external capacitor Less pop noise Standby switch circuit on chip (microprocessor supported) Various protectors on chip (output-to-ground short/output-to-vcc short/load short/overvoltage/thermal shutdown circuit) Specifications Maximum Ratings at Ta = C Parameter Symbol Conditions Ratings Unit Maximum supply voltage V CC max 1 No signal, t = 6s V V CC max 16 V Surge supply voltage V CC surge t.s, single giant pulse V Maximum output current I O peak Per channel. A Allowable power dissipation Pd max Arbitrarily large heat sink. W Operating temperature Topr to 8 C Storage temperature Tstg to 1 C * Set V CC, R L in a range that does not exceed Pd max =.W Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. ORDERING INFORMATION See detailed ordering and shipping information on page 9 of this data sheet. Semiconductor Components Industries, LLC, 1 March, 1 SIP18H 1HK/6161SY 1-S1 No.A18-1/9

2 Operating Conditions at Ta = C LA8N Parameter Symbol Conditions Ratings Unit Recommended supply voltage V CC 1. V Operating voltage range V CC op Range where Pd max is not exceeded 9 to 16 V Recommended load resistance R L Recommended load resistance range R L op to Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. Electrical Characteristics at Ta = C, VCC = 1.V, RL =, f = 1kHz, Rg = 6 Parameter Symbol Conditions min typ max Unit Quiescent current I CCO 1 ma Standby current lst 1 6 A Voltage gain VG 8 db Total harmonic distortion THD P O = W.. % Output power P O 1 THD = 1% 16 W P O THD = 1%, V CC = 1.V W P O THD = 1%, R L = W Output offset voltage V N offset Rg = mv Output noise voltage V NO Rg =, B.P.F. = Hz to khz.1. mvrms Ripple rejection ratio SVRR Rg =, f R = 1Hz, V R = dbm db Channel separation CHsep Rg = 1k, V O = dbm 6 db Input resistance r i 1 9 k Standby pin applied voltaga Vst Amp on, applied through 1k. V CC V Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. Package Dimensions unit : mm SIP18 6.8x1.8 / SIP18H CASE 1AS ISSUE A GENERIC MARKING DIAGRAM* XXXXXXXXXX YMDDD XXXXX = Specific Device Code Y = Year M = Month DDD = Additional Traceability Data *This information is generic. Please refer to device data sheet for actual part marking. No. A18-/9

3 LA8N Allowable power dissipation, Pd max -- W 1 1. Arbitrarily large heat sink θ f = 1. C/W. C/W. C/W.1 C/W. C/W No Fin Pd max -- Ta θ jc =. C/W Heat sink thermal resistance, θf -- C/ W 1 θf -- Sf AI heat sink, t = 1.mm Tightening torque 9N cm With silicone grease applied Ambient temperature, Ta -- C JK Heat sink area, S f -- cm JK8 Block Diagram 1μF/ 16V C 1 V CC 1 18 C μf V CC C1 IN1.μF/ 6.V PRE GND R1 OFF ON 1kΩ V C IN.μF/ 6.V RIPPLE FILTER IN - BIAS CIRCUIT STANDBY SW IN - POP NOISE PREVENTION CIRCUIT PREDRIVER PREDRIVER PREDRIVER PREDRIVER OVERVOLTAGE/ SURGE PROTECTOR THERMAL SHUTDOWN LOAD SHORT PROTECTOR V CC LOAD SHORT PROTECTOR OUTPUT PIN-TO-V CC SHORT PROTECTOR GND1 OUTPUT PIN-TO-GND SHORT PROTECTOR OUTPUT PIN-TO-GND SHORT PROTECTOR GND OUTPUT PIN-TO-V CC SHORT PROTECTOR INVERTING 1.1μF C6 R.Ω 16 R.Ω μF C NONINVERTING POLYESTER FILM CAPACITOR R.1μF C8.Ω.Ω.1μF C9 INVERTING OUT - NONINVERTING OUT R - R L to Ω R L to Ω μf/ 6.V V CC C N.C Pins 1,9 : Don't use. Pin 1 : No connection. Each Pin Voltage VCC = 1.V, V applied through STBY = 1k, RL =, Rg = Pin No. 1 6 Name IN1 DC Pre-GND STBY ON TIME Pin voltage (V) Pin No Name IN POP - N.C V CC OUT Pin voltage (V) Pin No Name PWR-GND OUT OUT 1 PWR-GND 1 OUT 1 V CC 1 Pin voltage (V) No. A18-/9

4 LA8N Sample Print Pattern V CC 1 C R GND C 6 C 1 C R 1 IN1 STB PRE GND C C IN R C OUT R C 8 GND Copper foil area 9 1mm R C 9 Description of External Components C1, C Input capacitors. F is recommended. f L can be varied by C1, C capacitances to adjust the bass range. C C C Decoupling capacitor (ripple filter) Amplifier on time setting capacitor Power supply capacitor Approximately.8 second for F. Since the on time is proportional to this capacitance, it can be set as desired by varying this capacitance. (Refer to the characteristics curve.) C6, C, C8, C9 Oscillation blocking capacitors Use polyester film capacitors (Mylar capacitors) with good temperature characteristics. (R, R, R, and R used jointly.) Since stability may be affected slightly by the pattern layout, etc.,.1 F or more is recommended. R1 Standby switch current limiting resistor 1k is recommended (when the applied voltage for the standby switch is.v to 1.V). This resistor cannot be removed. No. A18-/9

5 Features of IC Inside and Usage Notes Standby function Pin is the standby switch pin. The amplifier is turned on by applying approximately.v or more to this pin through an external resistor (R1). If voltage in excess of 1.V is to be applied to the standby switch, calculate the value of R1 using the following formula so that the current flowing into pin is A or less: LA8N R1 = Applied voltage 1.V A 1k Mute function Pin 6 is the connector for the capacitor that determines the on time in order to prevent pop noise. By grounding this pin, the amplifier can implement mute operation. In this case, the recovery time depends on C. How to reduce pop noise Although the LA8N reduces pop noise, an electrolytic capacitor of between. and. F can be connected between pin 8 and the pre-gnd to further reduce pop noise that occurs when power supply is turned on/off (standby switch on/off). The larger the capacitance, the lower the frequency of pop noise, and it is barely audible, but sound residue of the sound signal is liable to linger when power is turned off. Pin 8 is the bias pin for the output amplifier and normally is left open. Protectors In an output-to-ground and output-to-vcc short protector system configuration, if a DC resistor is connected between amplifier output pin and GND, the protector may operate, causing the amplifier not to start operating. Therefore, as a general rule, no DC resistor should be connected between amplifier output pin and GND. In order to prevent damage or degradation which may be caused by abnormally heated IC, the LA8N has a thermal shutdown protector. Accordingly, if the IC junction temperature (Tj) climbs to around 1 to 18 C due to inadequate heat dissipation, the thermal shutdown protector will operate to control the output gradually into attenuation. Also be fully careful of handling other protectors built in the LA8N. Miscellaneous Since pins 1 and 9, which are unused, are connected internally, they must be left open. Pin 1 is an NC pin (no internal connection). No. A18-/9

6 LA8N Quiescent current, ICCO -- ma ICCO -- VCC RL = Open Rg = VST = V Output power, P O -- W 1 1. f = 1kHz Rg = 6Ω VG = db PO -- VIN VCC = 1.V VCC = 1.V Output power, P O -- W Supply voltage, VCC -- V JK86 8 f = 1kHz Rg = 6Ω THD = 1% R L = Ω PO -- VCC Exceeding Pd max Output power, P O -- W Input level, V IN -- mvrms PO -- VCC f = 1kHz Rg = 6Ω THD = % R L = Ω JK Total harmoinc distortion, THD -- % Total harmoinc distortion, THD -- % Supply voltage, VCC -- V JK88 V CC = 1.V R L = Ω Rg = 6Ω V CC = 1.V Rg = 6Ω P O = W 1..1 THD -- PO f = 1kHz 1Hz 1kHz Output power, PO -- W THD -- f JK81 Total harmoinc distortion, THD -- % Response -- db V CC = 1.V R L = Ω Rg = 6Ω Supply voltage, VCC -- V THD -- PO f = 1kHz 1Hz 1kHz JK Output power, PO -- W JK V CC = 1.V Rg = 6Ω V O = dbm at f = 1kHz f Response 1 1 1k 1k 1k Input frequency, f -- Hz JK k 1k 1k Input frequency, f -- Hz JK81 No. A18-6/9

7 LA8N Power dissipation, Pd -- W Ripple rejection ratio, SVRR -- db Output noise voltage, VNO -- mvrms Output power, PO -- W PO -- f THD = 1% % 1% 1 VCC = 1.V 1 Rg = 6Ω VG = db k 1k Input frequency, f -- Hz JK81 1. VCC = 1.V DIN AUDIO.1 VNO -- Rg 1k 1k 1k Input resistance, Rg -- Ω JK SVRR -- fr OUT V CC = 1.V Rg = V CCR = dbm The value of power supply capacitor is.μf (Mylar) k 1k 1k Ripple frequency, f R -- Hz JK818 Rg = 6Ω 1 f = 1kHz 1 Pd (V CC = 16V) Pd, ICC -- PO ICC (VCC = 16V) Pd (V CC = 1.V) 1 1. Channel separation, CHSep -- db Ripple rejection ratio, SVRR -- db Ripple rejection ratio, SVRR -- db Current drain, I CC -- A Power dissipation, Pd -- W CH Sep -- f VCC = 1.V Rg = 1kΩ VO = dbm CH1 CH CH CH k 1k 1k Input frequency, f -- Hz JK SVRR -- VCC OUT Rg = fr = 1Hz VCCR = dbm μf (power supply capacitor) is changed to.μf (Mylar) Supply voltage, V CC -- V JK SVRR -- VCCR fr = 1Hz fr = khz V CC = 1.V f R = 1Hz/kHz OUT OUT -8 The value of power supply capacitor is.μf (Mylar) Calculate as SVRR = log VO VCCR Power supply ripple voltage, V CCR -- Vrms JK819 Pd, ICC -- PO R L = Ω Rg = 6Ω 1 f = 1kHz Allowable power dissipation package 1 Pd max =.W Pd (VCC = 16V) ICC (VCC = 16V) Pd (VCC = 1.V) 1 1. Current drain, I CC -- A Output power, PO -- W JK Output power, PO -- W JK81 No. A18-/9

8 LA8N Output pin voltage, V N -- V VN -- VCC RL = Open Rg = Quiescent current, ICCO -- ma VCC = 1.V RL = Open Rg = ICCO -- Ta Output power, P O -- W VCC = 1.V Rg = 6Ω 6 f = 1kHz THD = 1% 18 Supply voltage, VCC -- V PO -- Ta R L = Ω 8 JK8 Total harmonic distortion, THD -- % Ambient temperature, Ta -- C JK8.1 THD -- Ta VCC = 1.V Rg = 6Ω f = 1kHz PO = W Ambient temperature, Ta -- C JK8 8 VN -- VST Ambient temperature, Ta -- C Amp ON time -- C JK Output pin voltage, V N -- V 6 V CC = 1.V Rg = 1 Apply V ST to standby pin (pin ) through 1kΩ Standby pin applied voltage, VST -- V JK86 Amp ON time -- s V CC = 1.V VST = V (Apply to pin through 1kΩ.) 1 1 C -- μf JK8 PS No. A18-8/9

9 LA8N ORDERING INFORMATION LA8N-E Device Package Shipping (Qty / Packing) SIP18H (Pb-Free) 1 / Fan-Fold ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC s product/patent coverage may be accessed at SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitabilityof its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Typical parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customer s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PS No. A18-9/9