AN8497SA PANASONIC

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Technical content

ICs for Compact Disc/CD-ROM Player AN8497SA 3-channel linear input PWM driver IC n 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. n Features

  • 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 µA)
  • Only for supply voltage 5 V
  • Phase compensation function n Applications
  • Optical disk drive n Block Diagram Unit: mm SSOP032 P-0300 11 6 (0.5) (0.625) 11.0±0.3 0.1±0.1 1.5±0.2 8.1±0.3 0.65 0.3 +0.10 –0.05 0.2+0.10 –0.05 Seating plane

32 PG12

N.C. BC1 BC2 VPUMP CLK CT FB3 16SV DD V REF In3 In2 FB2 FB1 YC2B YC2A YC1B YC1A SO1 RO1 FO1 VM12 In1 SGND H bridge H bridge H bridge V/I V/I V/I Pre- driverPre- driver Pre- driver Standby (full circuit) ABS ABS ABS Logic Logic Logic TSD V REF detection SV DD detection Charge pump Triangular wave oscillator

AN8497SA ICs for Compact Disc/CD-ROM Player n Pin Descriptions n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage *2 SV DD 6.0 V V M12 , VM3 Supply voltage application range SV DD - 0.3 to +6.0 V V M12 , VM3 Drive output voltage *7 V (m) 7.0 V Control signal input voltage *8 V (n) SGND to SV DD V Supply current *3 ISVDD 200 mA IVM12 2 000 IVM3 1 200 Drive output current channel 1, 2 *5 I(o) –1 000 mA Drive output current channel 3 *6 I(p) –1 200 mA Power dissipation *4 PD 400 mW Operating ambient temperature *1 T opr -30 to +75 °C Storage temperature *1 Tstg -55 to +150 °C 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 = 25°C. *2: The voltage in a step-up voltage circuit exceeds a supply voltage. Refer to "n Electrical Characteristics" for an allowable value of a step-up voltage. *3: Use within 1 000 mA in each channel 1 and channel 2. Pin No. Symbol Description

17 FB3 Channel 3 feedback signal output pin

18 CT Triangular wave output pin

19 CLK CLK synchronous pulse input pin

20 VPUMP Charge pump step-up voltage output

21 BC2 Charge pump capacitor connection pin 2

22 BC1 Charge pump capacitor connection pin 1

23 N.C. N.C.

24 RO3 Channel 3 reverse output pin

25 VM3 Channel 3 power supply

26 PG3 Channel 3 power ground

27 FO3 Channel 3 forward output pin

28 SB All shut off input pin

29 SO2 Channel 2 feedback signal input pin

30 RO2 Channel 2 reverse output pin

31 FO2 Channel 2 forward output pin

32 PG12 Channel 1, 2 power supply

Pin No. Symbol Description

1 VM12 Channel 1, 2 power supply

2 FO1 Channel 1 forward output pin

3 RO1 Channel 1 reverse output pin

4 SO1 Channel 1 feedback signal input pin

5 YC1A Channel 1 feedback gain adjustment pin A

6 YC1B Channel 1 feedback gain adjustment pin B

7 YC2A Channel 2 feedback gain adjustment pin A

8 YC2B Channel 2 feedback gain adjustment pin B

9 FB1 Channel 1 feedback signal output pin

10 In1 Channel 1 driver input pin

11 FB2 Channel 2 feedback signal output pin

12 In2 Channel 2 driver input pin

13 V REF Reference voltage input pin

14 SGND Control circuit ground

15 In3 Channel 3 driver input pin

16 SV DD Control circuit power supply

ICs for Compact Disc/CD-ROM Player AN8497SA n Electrical Characteristics at SVDD = VM12 = VM3 = 5 V, VREF = 1.65 V, SB = 3.3 V, RL = 8 W, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Power supply current at standby I VMS SB = "L" ¾¾ 10 mA Control supply current at standby ISVS SB = "L", VREF = 0 V ¾¾ 10 mA Control supply current at no input ISVA SB = "H" ¾ 51 0 m A Charge pump Output voltage V PMP IPMP = 0 mA 7.0 8.4 9.8 V Current output capability V PMPL IPMP = -1 mA 5.9 7.3 8.7 V Triangular wave generation circuit Sink current I CTSN V CT = 1.6 V 133 153 173 mA Source current I CTSR V CT = 0.1 V 37 44 51 mA Self-running oscillation frequency fTR C CT = 100 pF 175 200 225 kHz Driver block Channel 1, 2 output on resistance RON1 , R ON2 R L = 8 W¾ 1.4 2.3 W (upper/lower) Channel 3 output on resistance R ON3 R L = 8 W¾ 0.8 1.6 W (upper/lower) Output offset voltage V OS ¾- 50 ¾ 50 mV Voltage gain "+"G ¾ 12.0 14.0 16.0 dB "+" / "-" relative gain G R ¾- 1.5 ¾ 1.5 dB Dead zone converted to input V DZ ¾ 01 0 3 0 m V SV DD reset Reset supply voltage V RESH ¾ 4.5 ¾¾ V VREF reset High-level input voltage V RRH ¾ 1.35 ¾¾ V Low-level input voltage V RRL ¾¾ ¾ 0.7 V Standby operation High-level input voltage V SBH ¾ 2.7 ¾¾ V Low-level input voltage V SBL ¾¾ ¾ 0.8 V n Recommended Operating Range Parameter Symbol Range Unit Supply voltage SV DD 4.5 to 5.0 to 5.5 V V M12 , VM3 3.5 to 5.0 to 5.5 n Absolute Maximum Ratings (continued) Note) *4: Use within the range of not exceeding PD = 400 mW without heat sink and at Ta = 75°C in accordance with an allowable power dissipation characteristic curve of "n Application Note". *6: p = 24, 27

AN8497SA ICs for Compact Disc/CD-ROM Player Parameter Symbol Conditions Min Typ Max Unit Thermal protection Thermal protection operating T TSD ¾¾ 160 ¾° C temperature Thermal protection hysteresis widthDTTSD ¾¾ 40 ¾° C SV DD reset Hysteresis width DV RES ¾¾ 0.2 ¾ V n 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 (SV DD 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 charac- teristics 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. n Application Note

  • PD ¾ Ta curves of SSOP032-P-0300 PD ¾ Ta n Electrical Characteristics at SVDD = VM12 = VM3 = 5 V, VREF = 1.65 V, SB = 3.3 V, RL = 8 W, Ta = 25°C (continued)
  • Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Ambient temperature Ta (°C) Power dissipation PD (W) 0.000 0.200 0.400 0.600 0.667 0.800 1.000 1.400 1.200 1.288 25 50 75 100 125 150 Mounted on standard board (glass epoxy: 50 · 50 · t0.8 mm3) R th(j-a) = 97.0°C/ W Independent IC without a heat sink R th(j-a) = 187.2°C/ W

ICs for Compact Disc/CD-ROM Player AN8497SA n Application Circuit Example PG12 FO2 FO3 PG3 VM3 RO3 N.C. BC1 BC2 0.1 mF 100 pF 8 200 pF CLK FB3 CT VPUMP RO2 8 W 910 W 15 kW 910 W 15 kW 18 kW 1.1 kW

8 W SO2

High: Active Low: Standby Standby sgnal input CLK synchronoussignal input 0.1 mF M H bridge H bridge H bridge V/I V/I V/I Pre- driverPre- driver Pre- driver Standby (full circuit) ABS ABS ABS Logic Logic Logic TSD V REF detection SV DD detection Charge pump Triangular wave oscillator SV DD SGND V REF In3 In2 In1 FB2 FB1 YC2B YC2A YC1B YC1A SO1 RO1 FO1 VM12 SV DD = 5 V V M = 5 V V REF = 1.65 V 30 kW30 kW 8 200 pF ch.3 inputch.2 input 8 200 pF ch.1 input