ICs for CD/CD-ROM Player AN8819NFB 4Ch. Linear Driver IC + DC-DC Converter Control for CD ■ Overview Actuator for CD, motor drive 10.0±0.3 12.2±0.4 0.8 44 12 11 0.9±0.1 + 0.1 0.2 – 0.05 0.9±0.1 0.1±0.1 1 (0.6) 10.0±0.3 12.2±0.4 44-lead QFP package (QFP044-P-1010) 2.0±0.3 • ■ Application + 0.1 22 34 ■ Features • Wide output D-range is available regardless of the reference voltage on the system Driver input/output gain setting enabled by an external resistance • For 2 channels, independent power on/off feature builtin. For other 2 channels, simultaneous on/off feature provided. • Thermal shut down circuit (with hysteresis) built-in • PWM control of the driver supply enabled by an external circuit for low consumption power operation • Construction of DC-DC converter enabled by an external circuit • Construction of ripple filter for D/A converter enabled by an external capacitor • Construction of PWM control circuit of laser output by an external circuit for low consumption power operation • Reset circuit with a mute and battery voltage detection circuit built-in for rational design of a set Unit : mm 23 0.3 – 0.05 33 The AN8819NFB is a 4ch. driver employing the low consumption power type H-bridge method which can operate with low voltage. It is suitable particularly for a portable CD player. – + – + – + 15 Max. Value PWM DRVCC 14 44 43 42 34 – 33 BTL 16 – + Absolute Value 26 25 17 – + 18 BTL Absolute Value 24 23 19 – + 20 BTL Absolute Value 29 30 21 – + 22 BTL Absolute Value 31 32 13 12 Ripple Filter 7 SGND 35 11 5 SVCC Thermal Shutdown PGND 28 27 6 – + – + + 4 – + 36 8 – + 2 Initial setting Starter 39 – + POWER OFF 10 Starter exchange – + 37 Switching Circuit 41 9 PVCC 3 40 1 38 DC-DC Conv. AN8819NFB ICs for CD/CD-ROM Player ■ Block Diagram ICs for CD/CD-ROM Player AN8819NFB ■ Pin Description Pin No. Pin Name Pin No. Pin Name 1 PVCC Supply Pin 23 TR– Driver Output Pin 2 DED Dead Time Input Pin 24 TR+ Driver Output Pin 3 OUT DC-DC Converter Output Pin 25 FO – Driver Output Pin 4 FB Error Amp. Input Pin 26 FO + Driver Output Pin 5 IN Error Amp. Output Pin 27 PGND Ground Pin 6 DRGND Ground Pin 28 PGND Ground Pin 7 SGND Ground Pin 29 SP + Driver Output Pin 8 SPRO Short-Circuit Protection Input Pin 30 SP – Driver Output Pin 9 BSEL Empty Detection Level Changeover Pin 31 TV+ Driver Output Pin 10 VSEN Empty Detection Input Pin 32 TV– Driver Output Pin 11 SVCC Power Pin 33 VC Driver Power Voltage Pin 12 CRIP Capacitor Pin for Ripple Rejection 34 TB PWM Circuit Output Pin 13 AVDD Ripple Filter Ouput Pin 35 RESET Reset Output Pin 14 DRVCC Supply Pin 36 MRST Muting Reset Output Pin 15 VREF 1/2 VCC Input Pin 37 EMP Empty Detection Output Pin 16 INFO Driver Input Pin 38 CLK External Synchronization Input Pin 17 INTR Driver Input Pin 39 START Start Oscillation Start Input Pin 18 LDON Driver ON – OFF Control Pin 40 POWER Power On/Off Input Pin 19 INSP Driver Input Pin 41 CT Triangular Wave Oscillation Pin 20 PC Driver ON – OFF Control Pin 42 PWMG PWM Loop Gain Adjustment Pin 21 INTV Driver Input Pin 43 COMPO APC Comparator Output Pin 22 TRVSTOP Driver ON – OFF Control Pin 44 COMPI APC Comparator Input Pin ■ Absolute Maximum Ratings (Ta=25˚C) Parameter Symbol Rating PVCC 15 SVCC 6 DRVCC 6 VSEN Pin Maximum Applied Voltage V10max. 15 V VC Pin Maximum Applied Voltage V33max. 9 V Supply Voltage Unit V Supply Current ICC Power Dissipation Note) PD Operating Ambient Temperature Topr –25 ~ + 75 ˚C Storage Temperature Tstg –55 ~ + 125 ˚C Note) mA 880 mW Unit ■ Recommended Operating Range (Ta=25˚C) Parameter Operating Supply Voltage Range Symbol Range PVCC 1.5V ~ 9V SVCC 2.7V ~ 5.5V DRVCC 2.7V ~ 5.5V ICs for CD/CD-ROM Player AN8819NFB ■ Electrical Characteristics (Ta=25˚C±2˚C) Parameter Symbol Condition SVCC No Load Supply Current I11Q DRVCC No Load Supply Current I14Q PVCC No Load Supply Current I1Q PVCC Leak Current I1L PVCC = 2.4V, SVCC = DRVCC = 3.2V, VREF = 1.6V PVCC1 = 2.4V, SVCC = DRVCC = 3.2V, VREF = 1.6V PVCC1 = 2.4V, SVCC = DRVCC = 3.2V, VREF = 1.6V PVCC = 9V, SVCC = DRVCC = 0V, VERF = 0V Driver Portion Maximum Drive Voltage of Pins FO, TR, SP and TV VDMAX Maximum Drive Current IDMAX Focus/Tracking/Traverse Transmission Gain (+) G+ Spindle Transmission Gain (+) Gsp + Focus/Tracking/Traverse Output Offset Voltage VOFF Spindle Output Offset Voltage Focus/Tracking/Traverse Input Conversion Dead Zone Spindle Input Conversion Dead Zone VSPOFF IDZ ISpDZ PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V min. typ. max. Unit 2.0 3.1 4.5 mA 1.8 2.4 3.0 mA 1.8 2.6 5.1 mA 2.0 µA DRVCC –1.2 V 500 mA 33 43 53 kΩ 67 87 107 kΩ –50 50 mV –100 100 mV –1 1 µA –2 2 µA DC-DC Converter Portion CLK Synchronization Output Pulse Maximum Duty D2C Self-Running Output Pulse Maximum Duty D2F Starting Output Pulse Maximum Duty D2S Self-Running Output Voltage (H) V20H Self-Running Output Voltage (L) V20L Starting Oscillation Frequency F41S Self-Running Oscillation Frequency F41F PVCC = 2.4V, SVCC = DRVCC = 3.2V, CT = 390pF/470kΩ, VIN = 0.8V PVCC = 2.4V, SVCC = DRVCC = 3.2V, CT = 390pF/470kΩ, VIN = 0.8V PVCC = 2.4V, SVCC = DRVCC = 3.2V, CT = 390pF/470kΩ, VIN = 0.8V PVCC = 2.4V, SVCC = 3.2V IOUT = –25mA, VCT = 0V, VFB = 0.7V PVCC = 2.4V, SVCC = DRVCC = 3.2V, IOUT = 15mA, VCT = 1V, VFB = 0.5V PVCC = 3.2V, SVCC = 0V CT = 390pF/470kΩ PVCC = 2.4V, SVCC = DRVCC = 3.2V, CT = 390pF/470kΩ 65 74 83 % 74 80 86 % 35 45 55 % 1.08 1.5 1.71 V 0.15 0.3 0.4 V 60 83 115 kHz 54 65 76 kHz Ripple Filter Portion Ripple Rejection Ratio RR13 PVCC = 2.4V, SVCC = DRVCC = 3.2V, Input = 35mVrms/20kHz 40 dB ICs for CD/CD-ROM Player AN8819NFB ■ Pin Description Pin No. Symbol I/O Pin Description 11 SVCC I Supply pin for control circuits other than of driver, not connected with DRVCC, PVCC 7 SGND I Ground pin for control circuits other than of driver 14 DRVCC I Supply pin for control circuit of driver, not connected with SVCC, PVCC 6 DRGND I Ground pin for control circuit of driver 1 PVCC I Supply pin supplying the current for output power transistor I Ground pin for output power transistor Equivalent Circuit 11 7 14 6 1 27 27 28 PGND 28 SVCC 2 2 Setting pin for dead time control input and soft start DED 50kΩ PVCC 3 OUT O 200Ω Switching output pin 3 15kΩ 25kΩ ICs for CD/CD-ROM Player AN8819NFB ■ Pin Description (Cont.) Pin No. 4 Symbol FB I/O O Pin Description Equivalent Circuit Error amp. output pin SVCC 26.9kΩ SVCC 13.1kΩ 5 IN I Error amp. input pin 5 4 16.4kΩ 8 SPRO I Short-circuit protection input pin 8 22kΩ 32kΩ 20kΩ 40 POWER I Switching output ON/OFF pin 40 79kΩ 62kΩ 13 13 AVDD O SVCC Supply pin for D/A converter SVCC 12 CRIP External capacitor pin for ripple rejection 12 ICs for CD/CD-ROM Player AN8819NFB ■ Pin Description (Cont.) Pin No. Symbol I/O Pin Description Equivalent Circuit DRVCC 15 VREF I VREF input pin 15 40kΩ 80kΩ 16 INFO I Input pin for Driver FO 16 DRVCC or 17 INTR I Input pin for Driver TR 17 VREF or 1kΩ 19 INSP I Input pin for Driver SP 19 or 21 INTV I Input pin for Driver TV I Power cut input pin for Drivers FO, TR. Driver output at L = GND 21 DRVCC 18 LDON 18 1kΩ or 20 20 PC I 100kΩ Power cut input pin for Driver SP. Driver output at H = GND DRVCC 22 22 TRV STOP I Power cut input pin for Driver TV. Driver output at H = GND 23 TR– O – output pin of Driver TR 24 TR+ O + output pin of Driver TR 25 FO – O – output pin of Driver FO 26 FO + O + output pin of Driver FO 30 SP – O – output pin of Driver SP 29 SP + O + output pin of Driver SP 32 TV– O – output pin of Driver TV 31 TV+ O + output pin of Driver TV 24 or 26 33 VC O Driver supply pin 29 or 31 86kΩ 86kΩ 33 or 23 or 25 30 or 32 or ICs for CD/CD-ROM Player AN8819NFB ■ Pin Description (Cont.) Pin No. Symbol I/O Pin Description I Pin switching the dry cell and charger battery for battery voltage detection circuit Equivalent Circuit PVCC 9 BSEL 30kΩ 70kΩ 9 7.8kΩ 10 9.9kΩ 10 37 VSEN EMP I I Battery voltage detection input pin for battery voltage detection circuit Battery shortage detection output pin for battery voltage detection circuit 7kΩ 37 40kΩ 35 RESET O Reset output pin. Reset voltage = Output voltage × 90% 35 PVCC 60kΩ PVCC 20kΩ 36 36 MRST O Muting reset output pin. Reset voltage = Output voltage × 90% PVCC PVCC 39 START O Start pin. OUT pin starts switching in start mode 200kΩ 39 100kΩ ICs for CD/CD-ROM Player AN8819NFB ■ Pin Description (Cont.) Pin No. Symbol I/O Pin Description Equivalent Circuit 50kΩ 38 CLK I Clock input pin, used to synchronize the triangular wave oscillation with clock. 38 20kΩ 50kΩ 160kΩ 41 CT O Triangular wave oscillation pin. Oscillation frequency determined by external R and C. Recommendable values : 470kΩ, 390pF 41 60kΩ PVCC 34 TB O Transistor base pin for controlling the driver supply voltage PWM 34 DRVCC 42 PWMG 43 COMP0 Gain adjustment pin for controlling the driver supply voltage PWM O APC switching comparator output pin I APC switching comparator input pin 42 43 SVCC 44 COMP1 44 1kΩ ICs for CD/CD-ROM Player AN8819NFB ■ Characteristic Curve PD –Ta 2,000 Glass epoxy board (50mm × 50mm × 0.8mm) Rthj– a = 70˚C/W PD =1786mW (25˚C) 1,800 1,786 Power Dissipation PD (mW) 1,600 1,400 1,200 1,000 880 800 600 Unit Rthj– a = 142˚C/W PD = 880mW (25˚C) 400 200 0 0 25 50 75 100 125 150 Ambient Temperature Ta (˚C) ■ Description for use • Driver Portion Set the driver gain calculated by the equation shown below, except for SP driver. For SP driver, the gain must be set to the calculated value + 6dB. G= 43kΩ 1.0kΩ + R R : External input resistance The total channel driver supply is Pin33. Set the driver supply as necessary, since the output amplitude increases with increase of the supply voltage. However, also increase the voltage of DRVCC pin (Pin14) at the same time. As protection functions, VREF detection and heat protection circuits are incorporated. VREF detector sets the driver output to high impedance, when the voltage applied to VREF is 0.75V or less. For the heat protective circuit, the set temperature for operation is approx. 150˚C and the release temperature is approx. 120˚C. FO and TR drivers have the built-in function for making short-circuit between either loading end and GND by LDON (Pin18), and for SP and TV drivers by PC (Pin20) and TRVSTOP (Pin22). LDON : Output GND at L PC : Output GND at H TRVSTOP : Output GND at H ICs for CD/CD-ROM Player AN8819NFB • DC-DC Converter Portion 3.4V regulator can be constructed by using external components. The output voltage can be made variable by using an external resistance. The short-circuit protective function stops switching of OUT pin (Pin3), unless the output of error amplifier (Pin4) reaches L after H, within t = CSPRO × VTH/ISPRO (VTH = 1.1V ISPRO = 30µA). (It is recommended that an electrolytic capacitor of 4.7µF around should be used for Pin3.) The soft start function works by attaching a capacitor to Pin2 for GND. t = CDED × R (R = 60kΩ) Also, MAX duty can be changed by attaching an external resistance to Pin2. The output voltage is determined as follows: (Example) Assuming R1 + R2 = 50kΩ SVCC 1.11V 11 R1 R1 × R3 R1 + R3 R3 IC Inside + SVCC = 1.1 × 5 IN R2 × R4 R2 + R4 R2 × R4 R2 + R4 – R2 + R4 FB 4 Where R3 = 26.9kΩ R4 = 13.1kΩ • Ripple Filter Portion for DA Converter (Ripple Filter of Low Saturation Voltage Type) Attach a capacitor for noise removal to CRIP pin for GND. (A capacitor of 22µF around is recommended.) Output current : 10mA (typ.) • Battery Voltage Detection Circuit The voltage applied to VSEN pin (Pin10) and the constant voltage are compared for output to EMP pin (Pin37). There is approx. 50mV of hysteresis from detection to reset to prevent the output chattering. The detection threshold voltage can be made variable by an external resistance. The threshold values with no external resistances at VSEN pin (Pin10) are as follows: Detection : VSEN = 2.2V (typ.) BSEL (Pin9) = L Reset : VSEN = 2.25V (typ.) BSEL (Pin9) = L Detection : VSEN = 1.8V (typ.) BSEL (Pin9) = HiZ Reset : VSEN = 1.85V (typ.) BSEL (Pin9) = HiZ Use the following equation as reference to determine the detection threshold voltage: R1 VSEN’ VSEN 10 Assuming that the voltage of VSEN (Pin10) at battery shortage detection is VSEN’ VSEN’ = R2 R1 + R2 + R3 × 1.25 R3 + – Where R3 1.25V IC Inside 37 EMP R1 : External Resistance R2 : 8.0kΩ R3 : 16.5kΩ (BSEL = HiZ) R3 : 10.5kΩ (BSEL = L) • RESET and MRST Portions RESET (Pin35) is changed from L to H, and MRST pin is changed from H to L, with approx. 90% of the output voltage by a DCDC converter.