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| ICs for Compact Disc/CD-ROM Player AN8497SA 3-channel linear input PWM driver IC s Overview The AN8497SA is a PWM output 3-channel driver IC supporting linear inputs, and best suited for an actuator and a motor drive for CD-ROM and DVD-ROM. Due to its linear input, a conventional system can be used only by replacing a driver. And, due to an adoption of PWM output, you can reduce considerably power consumption compared with a conventional driver. Further a space saving surface mount package is adopted thanks to its low thermal generation. 32 11.00.3 17 Unit: mm 6.10.3 8.10.3 0.650.10 1 16 0.2-0.05 1.50.2 +0.10 * Maximum 64% reduction of power consumption compared with a conventional linear 3-channel driver IC * Free gain setting by an external resistor due to voltage feedback * Standby function available (standby current < 20 A) * Only for supply voltage 5 V * Phase compensation function (0.625) 0.65 0.3 -0.05 +0.10 Seating plane 0.650.10 0.10.1 s Features (0.5) SSOP032 P-0300 s Applications * Optical disk drive VPUMP s Block Diagram PG12 VM3 N.C. RO2 RO3 BC1 BC2 FO2 SO2 FO3 PG3 SB CLK 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 Standby (full circuit) H bridge Predriver Predriver H bridge V/I Predriver Charge pump Triangular wave oscillator 17 TSD VREF detection detection H bridge V/I V/I Logic Logic Logic ABS ABS ABS 10 11 12 13 14 15 In3 YC1A YC2A SGND VM12 YC1B YC2B SVDD FO1 RO1 SO1 FB1 In1 FB2 In2 VREF 16 1 2 3 4 5 6 7 8 9 FB3 SVDD CT 1 AN8497SA s Pin Descriptions Pin No. Symbol 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VM12 FO1 RO1 SO1 YC1A YC1B YC2A YC2B FB1 In1 FB2 In2 VREF SGND In3 SVDD Description Channel 1, 2 power supply Channel 1 forward output pin Channel 1 reverse output pin Channel 1 feedback signal input pin Channel 1 feedback gain adjustment pin A Channel 1 feedback gain adjustment pin B Channel 2 feedback gain adjustment pin A Channel 2 feedback gain adjustment pin B Channel 1 feedback signal output pin Channel 1 driver input pin Channel 2 feedback signal output pin Channel 2 driver input pin Reference voltage input pin Control circuit ground Channel 3 driver input pin Control circuit power supply ICs for Compact Disc/CD-ROM Player Pin No. Symbol 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 FB3 CT CLK Description Channel 3 feedback signal output pin Triangular wave output pin CLK synchronous pulse input pin VPUMP Charge pump step-up voltage output BC2 BC1 N.C. RO3 VM3 PG3 FO3 SB SO2 RO2 FO2 PG12 Charge pump capacitor connection pin 2 Charge pump capacitor connection pin 1 N.C. Channel 3 reverse output pin Channel 3 power supply Channel 3 power ground Channel 3 forward output pin All shut off input pin Channel 2 feedback signal input pin Channel 2 reverse output pin Channel 2 forward output pin Channel 1, 2 power supply s Absolute Maximum Ratings Parameter Supply voltage *2 Symbol SVDD VM12 , VM3 Rating 6.0 - 0.3 to +6.0 Unit V Supply voltage application range *7 *8 SVDD VM12 , VM3 V Drive output voltage *3 V(m) V(n) ISVDD IVM12 IVM3 *5 7.0 SGND to SVDD 200 2 000 1 200 1 000 1 200 400 -30 to +75 -55 to +150 V V mA Control signal input voltage Supply current Drive output current channel 1, 2 Drive output current channel 3 Power dissipation *4 *1 *6 I(o) I(p) PD Topr Tstg mA mA mW C C Operating ambient temperature Storage temperature *1 Note) Do not apply external currents or voltages to any pins not specifically mentioned expect for the power supply and GND pins. For circuit currents, '+' denotes current flowing into the IC, and '-' denotes current flowing out of the IC. *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: The voltage in a step-up voltage circuit exceeds a supply voltage. Refer to "s Electrical Characteristics" for an allowable value of a step-up voltage. *3: Use within 1 000 mA in each channel 1 and channel 2. 2 ICs for Compact Disc/CD-ROM Player s Absolute Maximum Ratings (continued) AN8497SA Note) *4: Use within the range of not exceeding PD = 400 mW without heat sink and at Ta = 75C in accordance with an allowable power dissipation characteristic curve of "s Application Note". *5: o = 2, 3, 30, 31 *6: p = 24, 27 *7: m = 2, 3, 4, 24, 27, 29, 30, 31 *8: n = 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 ,15, 17, 18, 19, 22, 28 s Recommended Operating Range Parameter Supply voltage Symbol SVDD VM12 , VM3 Range 4.5 to 5.0 to 5.5 3.5 to 5.0 to 5.5 Unit V s Electrical Characteristics at SVDD = VM12 = VM3 = 5 V, VREF = 1.65 V, SB = 3.3 V, RL = 8 , Ta = 25C Parameter Power supply current at standby Control supply current at standby Control supply current at no input Charge pump Output voltage Current output capability Triangular wave generation circuit Sink current Source current Self-running oscillation frequency Driver block Channel 1, 2 output on resistance (upper/lower) Channel 3 output on resistance (upper/lower) Output offset voltage Voltage gain "+" "+" / "-" relative gain Dead zone converted to input SVDD reset Reset supply voltage VREF reset High-level input voltage Low-level input voltage Standby operation High-level input voltage Low-level input voltage VSBH VSBL 2.7 0.8 V V 3 VRRH VRRL 1.35 0.7 V V VRESH 4.5 V RON1 , RON2 RL = 8 RON3 VOS G GR VDZ RL = 8 -50 12.0 -1.5 0 1.4 0.8 14.0 10 2.3 1.6 50 16.0 1.5 30 mV dB dB mV ICTSN ICTSR fTR VCT = 1.6 V VCT = 0.1 V CCT = 100 pF 133 37 175 153 44 200 173 51 225 A A kHz VPMP VPMPL IPMP = 0 mA IPMP = -1 mA 7.0 5.9 8.4 7.3 9.8 8.7 V V Symbol IVMS ISVS ISVA SB = "L" SB = "L", VREF = 0 V SB = "H" Conditions Min Typ 5 Max 10 10 10 Unit A A mA AN8497SA ICs for Compact Disc/CD-ROM Player s Electrical Characteristics at SVDD = VM12 = VM3 = 5 V, VREF = 1.65 V, SB = 3.3 V, RL = 8 , Ta = 25C (continued) * Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Parameter Thermal protection Thermal protection operating temperature Thermal protection hysteresis width SVDD reset Hysteresis width Symbol Conditions Min Typ Max Unit C C TTSD TTSD VRES 160 40 0.2 V s Usage Notes 1. Be sure to use SVDD in the highest potential within the IC. 2. Standby operation, reset operation Pin 28 is a standby switch input pin. You can get an active mode with high-level and standby mode with low-level. In a reset operation, all the functions of the IC stop. In a reset mode (SVDD reset, VREF reset and thermal protection on), only a charge pump operates. 3. Power on and off be done in a standby mode (VSB: Low). 4. Do not use pin 13 (VREF) in an open state. 5. Take time to check the characteristics on use. When changing an external circuit constant for use, consider not only static characteristics, but also transient characteristics and external parts with respect to the characteristics difference among ICs so that you can get enough margin. 6. Keep each output pin from being short-circuited to SVDD or VM or GND (line-to-supply and line-to-ground fault) and also between themselves (load short-circuit). Otherwise the IC will be damaged and is likely to get fired. 7. Be cautious on a dip soldering. Prior study is required. s Application Note * PD Ta curves of SSOP032-P-0300 PD T a 1.400 1.288 1.200 Mounted on standard board (glass epoxy: 50 x 50 x t0.8 mm3) Rth(j-a) = 97.0C/ W Power dissipation PD (W) 1.000 0.800 0.667 0.600 0.400 Independent IC without a heat sink Rth(j-a) = 187.2C/ W 0.200 0.000 0 25 50 75 100 125 150 Ambient temperature Ta (C) 4 ICs for Compact Disc/CD-ROM Player s Application Circuit Example VPUMP High: Active Low: Standby Standby sgnal input PG12 8 M AN8497SA 0.1 F 18 100 pF 25 VM3 19 CLK 23 N.C. 24 RO3 30 RO2 22 BC1 21 BC2 31 FO2 27 FO3 29 SO2 28 SB 32 26 20 Standby (full circuit) H bridge Predriver Predriver H bridge V/I Predriver Charge pump Triangular wave oscillator 17 TSD VREF detection 8 200 pF SVDD detection H bridge PG3 0.1 F V/I V/I Logic Logic Logic ABS ABS ABS In1 10 FB2 11 In2 12 VREF 13 SGND 14 In3 15 18 k CT ch.3 input 910 15 k 910 30 k 30 k VM = 5 V 8 200 pF ch.1 input 8 200 pF ch.2 input VREF = 1.65 V 15 k SVDD = 5 V 1.1 k SVDD 16 VM12 1 FO1 2 RO1 3 SO1 4 YC1A 5 YC1B 6 YC2A 7 YC2B 8 8 FB1 9 FB3 CLK synchronous signal input 5 |
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