AT5802

AT5802 Preliminary 4-Channel driver + Power Controller Features ˙4 channels of Power-Mos H-bridge drivers. ˙Built-in DC/DC converter control circuit. ˙Built-in reset circuit. ˙Built-in VG booster circuit. ˙Built-in voltage down regulator circuit. ˙Built-in On/OFF function ˙Low power consumption. ˙Direct PWM drive system. ˙QFP44 package. Description The AT5802 is a 4-channel driver and power controller for portable CD players on a single chip. The driver block power supply uses the on-chip switching regulator, making this component an ideal choice for low-power sets. Applications Disc-man Portable compact disc players (CDP) Portable Mini disc player (MD) Other portable compact disc media Block Diagram PGND2 PGND1 PVCC2 PVCC1 OUT2+ OUT3+ OUT4+ 24 OUT1- OUT2- OUT3- 33 32 31 30 29 28 27 26 25 OUT423 OUT1+ SPRT SOFT CT DC_IN REGB REGO GND PGND3 LG VG 34 PRE-DRIVER 35 PRE-DRIVER PRE-DRIVER PRE-DRIVER 22 FIL4 FIL3 FIL2 FIL1 VREF IN4 IN3 IN2 IN1 RESET MUTE1 21 36 20 37 19 38 REGULATOR SWITCH OUTPUT 18 39 VSYS DETECT 17 40 16 41 15 42 43 PRE-DRIVER POWER SUPPLY CONVERTER DC/DC CONVERTER 14 TRIANG WAVE RESET 13 44 POWER OFF STARTER MUTE1 MUTE34 12 1 SW 2 VSYS 3 4 EO 5 N.C. 6 N.C. 7 N.C. 8 START 9 OFF 10 CLK 11 MUTE34 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 1 EI AT5802 Preliminary 4-Channel driver + Power Controller Pin Assignments 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 2 AT5802 Preliminary 4-Channel driver + Power Controller Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 Pin name SW VSYS EI EO N.C. N.C. N.C. START OFF CLK MUTE34 MUTE1 RESET IN1 IN2 IN3 IN4 VREF FIL1 FIL2 FIL3 FIL4 OUT4OUT4+ PGND1 PVCC1 OUT3OUT3+ OUT2OUT2+ PVCC2 PGND2 OUT1OUT1+ SPRT SOFT CT DC_IN REGB REGO GND PGND3 LG VG Function Booster transistor drive Control circuit power supply input DC/DC converter error amplifier input DC/DC converter error amplifier output DC/DC converter starting input DC/DC converter off input External clock synchronization input CH3 CH4 mute input CH1 mute input Reset output CH1 input CH2 input CH3 input CH4 input Reference power supply input CH1 feedback filter CH2 feedback filter CH3 feedback filter CH4 feedback filter CH4 negative output CH4 positive output Power unit ground 1 H-bridge power supply input 1 CH3 negative output CH3 positive output CH2 negative output CH2 positive output H-bridge power supply input 2 Power unit ground 2 CH1 negative output CH1 positive output Short-circuit protection setting input Soft-start setting input Triangular wave output AC adapter power supply input TR driving terminal for regulator Battery power supply input Pre-Unit Power supply ground Power unit ground 3 Drive coil for boosting VG terminal Drive the power-Mos circuit power supply input 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 3 AT5802 Preliminary 4-Channel driver + Power Controller Absolute maximum ratings (Ta = 25oC) Parameter H-bridge power Supply voltage Battery power Supply voltage System power Supply voltage AC adapter power Supply voltage Pre-driver power Supply voltage Power dissipation Operating temperature range Storage temperature range o ﹡Derating is done 5mW/ C for operation above Ta=25oC. Symbol PVCC1, 2 REGO VSYS DC_IN VG Pd Topr Tstg Limits 7 7 7 7 7 1000* -30~+85 -55~+150 unit V V V V V mW o C o C Recommended operating conditions (Ta = 25oC) Parameter H-bridge power Supply voltage Battery power Supply voltage System power Supply voltage AC adapter power Supply voltage Pre-driver power Supply voltage* Ambient temperature Symbol PVCC1, 2 REGO VSYS DC_IN VG Ta Min. 1.5 1.5 2.0 2.0 5.0 -10 Typ. 2.4 2.4 2.5 4.5 6.0 25 Max. 6.5 6.5 6.5 6.5 6.9 70 unit V V V V V o C ﹡The built-in booster circuit is not used, but the voltage is supplied from outside. Electrical characteristics (Unless specified particular, Ta = 25oC, PVCC1, 2=REGO=2.4V, VSYS=2.5V, VG=6V, VREF=1.25V ) Parameter REGO stand-by current VG stand-by current REGO supply current DC_IN supply current VSYS supply current VG supply current LG leak current Symbol Min. IREGOST Typ. 0.45 1.4 4.5 0.35 Max. 3 3 1.0 3.0 9.0 0.7 3 Unit Conditions Common section IVGST IREGO IDC_IN IVSYS IVG ILGLK RON VOO GVC VDB12 VDB34 μA VSYS=0V μA VSYS=0V mA mA DC_IN=5V mA CT=470PF,fCLK=88.2KHz mA VIN=1.49V μA LG=6V, VSYS=0V Sum of on-resistance of top and that of bottom RIN=30KΩ CH1,2 CH3,4 PWM driver Output on-resistance Output offset voltage Output voltage gain Input dead zone CH1,2 (one side) Input dead zone CH3,4 (one side) -50 11.5 2 0 1.9 0 14.0 20 5 4 50 16.5 40 15 Ω mV dB mV mV 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 4 AT5802 Preliminary 4-Channel driver + Power Controller Parameter Mute 1 ON threshold voltage Mute 1 OFF threshold voltage Mute 34 ON threshold voltage Mute 34 OFF threshold voltage EI pin threshold voltage EO pin output voltage H EO pin output voltage L SPRT pin voltage(normal) SPRT pin current 1,EO=H SPRT pin current 2, OFF mode SPRT pin impedance SPRT pin threshold voltage SOFT pin output voltage SOFT pin current OFF pin ON threshold voltage OFF pin OFF threshold voltage OFF pin bias current START pin ON threshold voltage START pin OFF threshold voltage START pin bias current CLK pin threshold voltage H CLK pin threshold voltage L CLK pin bias current LG pin oscillating frequency LG pin maximum pulse duty LG pin output voltage L VG pin starter detect Symbol Min. Typ. Max. Unit Conditions Control pin threshold VMON1 VMOFF1 VMON34 VMOFF3 4 1.5 1.5 - 0.5 0.5 - V V V V Up / down voltage converter section VEITH VEOTH VEOL VSPRTN ISPRT1 ISPRT2 RSPRT VSPRTTH VSOFT ISOFT VOFFTH1 VOFFTH2 IOFF VSTATH1 VSTATH2 ISTART VCLKTH H 0.85 0.90 0.95 V 1.1 1.3 V IEO=100μA 0.4 V IEO=-60μA Short-circuit protection 0.2 V μA 3.8 5.8 8.8 7.5 210 0.4 1.22 3 VSYS -0.6 30 REGO -0.3 1.5 11.5 300 0.5 17.5 390 0.6 μA KΩ V V μA SOFT=0V V V μA OFF=0V V V μA VSYS=0V,START=0V V V CT=470PF, fCLK=88.2KHz CT=470PF, fCLK=88.2KHz Soft start section 1.67 2.12 6 9 Interface section VSYS -1.5 60 30 90 REGO -1.0 34 0.5 VCLKTHL ICLK fLG tLGMAX VLGL VVGSTT H μA CLK=2.5V 11 16 21 Starter circuit section 75 84 3.7 100 87 0.1 4.5 125 90 0.2 5.3 KHz VG=LG=5V ﹪ V V VG=LG=5V VG=LG=5V VG=3.5V→5.5V sweep 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 5 AT5802 Preliminary 4-Channel driver + Power Controller Parameter VG pin threshold voltage SW pin output voltage H Symbol Min. VVGTH VSWH 6.0 1.3 Typ. Max. Unit V V LG=5V CT=0.2V, ISW=-5mA, EI=0.7, VSPRT=0V CT=2V, ISW=1mA VSYS=1.6V, VG=5V EI=0.7, CT=470PF, VSPRT=0V EI=0.7, fCLK=88.2KHz, VSPRT=0V VSYS=1.6V, VG=5V EI=0.7, CT=470PF, VSPRT=0V, CLK=0V EI=0.7, CT=470PF, VSPRT=0V Conditions 6.5 7.0 DC/DC converter 1.8 - SW pin output voltage L VSWL 0.5 1.0 V SW pin oscillating tSWSTA 75 100 125 KHz frequency at start SW pin oscillating fSW1 46 58 70 KHz frequency (self-running) SW pin oscillating frequency (CLK fSW2 88.2 KHz synchronization) ﹪ SW pin pulse duty at start DSWSTA 40 50 60 SW pin oscillating ﹪ 80 90 95 maximum pulse duty DSW1 (self-running) SW pin oscillating ﹪ maximum pulse duty DSW2 80 90 95 (CLK synchronization) Triangular wave generation circuit CT pin VCTTHH 0.5 0.6 0.7 V threshold voltage H CT pin VCTTHL 0.14 0.2 0.26 V threshold voltage L μA CT pin sink current ICTSIN 80 92 104 CT pin output HCT 6.5 8 9.5 current ratio VSYS circuit section Discharge release voltage Starter→normal switching voltage Normal→starter switching voltage Starter→normal switching hysteresis voltage EI pin reset voltage threshold ratio Reset pin output voltage Reset pin leak current VDIS VSTN VNST VSTNHIS 1.40 1.65 1.57 40 1.51 1.75 1.67 80 1.62 1.85 1.77 120 V V V mV CT=0.5V→0.8V sweep CT=0.3V→0V sweep CT=1.0V Sink current/source current VSYS=1.5V→2V sweep VSYS=2V→1.5V sweep VSTN-VNST Reset section HRST VORESE T 80 - 85 - 90 0.5 2 ﹪ V Ratio of EI pin threshold ratio IRESET=-1mA ILKRESE T μA VRESET=2.5V Regulator circuit section Regulator output voltage VREG REGB pin output voltage VOREGB REGB pin leak current REGB pin limit current ILKREGB ILMREGB 2.9 10 3.2 15 3.5 1.4 3 20 REGO=OPEN, DC_IN=6V DC_IN=6V, IREG=10mA REGO=3.5V, DC_IN=6V, μA REGB=6V mA DC_IN=6V V V 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 6 AT5802 Preliminary 4-Channel driver + Power Controller Parameter Symbol Min. 1.9 Typ. Max. 1.3 Unit V V Conditions DC_IN low-voltage VDC-INL mute ON voltage V DC_IN low-voltage VDC-INO mute OFF voltage F ﹡This product is not designed for protection against radioactive rays. 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 7 AT5802 Preliminary 4-Channel driver + Power Controller Application circuit DC JACK 10u ZENER SLED SPINDLE TRACKING FOCUS M M 0.1u 0.1u 33 34 35 1u 32 31 30 29 28 27 26 25 24 23 22 0.022u 21 0.022u 36 0.1u 20 0.022u 37 470P 19 0.022u 38 39 B1013 220 18 AT5802 Vref IN4 IN3 IN2 IN1 RESET MUTE1 17 33K 40 41 42 100uH 16 20K 15 10K 14 10K 43 100u 0.1u 10u 100 59T 8T 1000P 0.1u C4115SR C4115SR 1K 10 47P 220u 10uH 24K 220u 10K 0.1u 22K 13 12 1 2 3 4 5 6 7 8 START SW 44 9 OFF SW 10 11 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 8 CLK MUTE34 AT5802 Preliminary 4-Channel driver + Power Controller Application explanation 1. DC/DC converter To set the output voltage, use the following R1 and R2. VSYS = 0.9 × R1 + R 2 R2 2. Booster circuit for driving the Power-Mos This circuit can generate a power source VG necessary for driving the built-in Power-Mos transistor. Oscillation frequency of LG terminal is independent and different from that of the main DC/DC converter. When system start-up, this circuit activates at first. 3. Down voltage regulator circuit The DC_IN is the power source of regulator circuit. If PNP transistor is externally attached, it allows the regulator circuit with the REGO set as the output voltage. Output voltage is 3.2V, this regulator output voltage depends on the built-in resistance. This circuit unable to control ON/OFF. 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 9 AT5802 Preliminary 4-Channel driver + Power Controller 4.Soft start The soft-start is functioned by putting a capacitor between SOFT terminal and GND. 5. Short circuit protection If the voltage of SPRT terminal has reached 0.5V, switching of SW terminal is disabled. The main DC/DC converter can be turned off only through the activation of timer latch circuit. Accordingly be sure to attach the capacitor on the SPRT terminal. ⊙ While the error amp output of EO is being completely set at “H”, SPRT terminal can be charged. The time until stopping the switching is determined by the following formula for the capacitor of SPRT terminal. t = CSPRT × VTH I SPRT (sec) (VTH=0.5V, ISPRT=5.8μA) ⊙ While the OFF terminal is being set at below VSYS-1.5V, SPRT terminal can be charged. The time until stopping the switching is determined by the following formula for the capacitor of SPRT terminal. t = CSPRT × VTH I SPRT (sec) (VTH=0.5V, ISPRT=11.5μA) 6. PWM driver H-bridge driver using 4 pieces of N-channel Mos transistor on output stage. Polarity of output and PWM duty are changed in proportion to differential voltage and absolute value of input sandwiching Vref. Load is direct-PWM driven by square wave of this changing duty. This driver is voltage feedback type, so, voltage gain is invariable in spite of fluctuation of battery voltage. 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 10 AT5802 Preliminary 4-Channel driver + Power Controller 7. Thermal shut down When the chip temperature has been 150℃ (Typ.), the output current is muted. And when the chip temperature has dropped to 130℃ (Typ.), the driver circuit starts up. Note in use 1. Between power supplies, attach a by-pass capacitor (approx. 0.1μF) at the root of this IC. 2. In principle, do not apply voltage below sub-potential of IC to terminal. Examine in consideration of operation margin, when each driver output falls below sub-voltage of IC (GND) due to counterelectromotive-force of choke coil, etc. 3. Output pin is to avoid short-circuiting with PVCC, GND, and other output pins. And, be fully careful in the direction of an integrated circuit on the substrate. 4. When use AC adapter, if apply beyond 7V to DC_IN pin, connect Z-Di with DC_IN pin. So keep voltage of DC_IN being below 7V. To protect IC, once the voltage to be applied on the DC_IN terminal exceeded 7.5V (Typ.), SPRT terminal can be charged.( ISPRT=11.5μA, see short circuit protection) 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 11 AT5802 Preliminary 4-Channel driver + Power Controller Package Outlines (units:mm): QFP-44 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 12