TB2901H TOSHIBA Bi-CMOS Digital Integrated Circuit Silicon Monolithic TB2901H Maximum Power 47 W BTL × 4-ch Audio Power IC The TB2901H is 4-ch BTL audio amplifier for car audio applications. This IC can generate higher power: POUT MAX = 47 W as it includes the pure complementary P-ch and N-ch DMOS output stage. It is designed to yield low distortion ratio for 4-ch BTL audio power amplifier, built-in standby function, muting function, and various kinds of protectors. Additionally, high-side switch is built in. Weight: 7.7 g (typ.) Features · High power output : POUT MAX (1) = 47 W (typ.) (VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUT MAX (2) = 43 W (typ.) (VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUT MAX (3) = 80 W (typ.) (VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 2 Ω) : POUT (1) = 29 W (typ.) (VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω) : POUT (2) = 25 W (typ.) (VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω) : POUT (3) = 55 W (typ.) (VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 2 Ω) · Low distortion ratio: THD = 0.015% (typ.) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω) · Low noise: VNO = 90 µVrms (typ.) (VCC = 13.2 V, Rg = 0 Ω, BW = 20 Hz~20 kHz, RL = 4 Ω) · Built-in standby switch function (pin 4) · Built-in muting function (pin 22) · Built-in high-side switch function (pin 25) · Built-in various protection circuits: · Operating supply voltage: VCC (opr) = 9~18 V (RL = 4 Ω) Thermal shut down, overvoltage, out to GND, out to VCC, out to out short Note 1: Since this device’s pins have a low withstanding voltage, please handle it with care. 1 2002-11-06 TB2901H 20 VCC1 6 VCC2 OUT1 (+) C1 11 PW-GND1 8 OUT2 (+) 12 RL 3 15 14 17 IN3 PW-GND3 18 OUT4 (+) RL 19 21 IN4 PW-GND4 24 OUT4 (-) RL 23 13 RIP STBY H-SW MUTE 10 4 25 22 5V C4 PLAY C2 PRE-GND 5 16 AC-GND OUT3 (-) C1 7 PW-GND2 2 OUT3 (+) C1 RL IN2 OUT2 (-) C6 9 IN1 OUT1 (-) C1 C3 1 TAB C5 Block Diagram R1 MUTE : PRE-GND : PW-GND 2 2002-11-06 TB2901H Caution and Application Method (Description is made only on the single channel.) 1. Voltage Gain Adjustment This IC has no NF (negative feedback) Pins. Therefore, the voltage gain can not be adjusted, but it makes the device a space and total costs saver. Amp. 2A Amp. 1 Input Amp. 2B Figure 1 Block Diagram The voltage gain of amp.1 : GV1 = 0dB The voltage gain of amp.2A, B : GV2 = 20dB The voltage gain of BTL connection : GV (BTL) = 6dB Therefore, the total voltage gain is decided by expression below. GV = GV1 + GV2 + GV (BTL) = 0 + 20 + 6 = 26dB 2. Standby SW Function (pin 4) By means of controlling pin 4 (standby pin) to High and Low, the power supply can be set to ON and OFF. The threshold voltage of pin 4 is set at about 3VBE (typ.), and the power supply current is about 2 mA (typ.) in the standby state. VCC ON Power OFF Control Voltage of Pin 4: VSB Standby Power VSB (V) ON OFF 0~1.5 OFF ON 3.5~6 V 4 10 kW » 2 VBE to BIAS CUTTING CIRCUIT When changing the time constant of pin 4, check the pop noise. Figure 2 With pin 4 set to High, Power is turned ON Advantage of Standby SW (1) (2) Since VCC can directly be controlled to ON or OFF by the microcomputer, the switching relay can be omitted. Since the control current is microscopic, the switching relay of small current capacity is satisfactory for switching. 3 2002-11-06 TB2901H Relay Large current capacity switch Battery Battery VCC From microcomputer VCC – Conventional Method – Small current capacity switch Battery From microcomputer Battery Stand-By VCC Stand-By VCC – Standby Switch Method – Figure 3 3. Muting Function (pin 22) Audio muting function is enabled when pin 22 is Low. When the time constant of the muting function is determined by R1 and C4, it should take into account the pop noise. The pop noise which is generated when the power or muting function is turned ON/OFF will vary according to the time constant. (Refer to Figure 4 and Figure 5.) The pin 22 is designed to operate off 5 V. Moreover, this terminal (pin 22) serves as the source switch of current of an internal mute circuit. And it is designed so that the discharge current of this terminal (pin 22) may serve as 200 mA. The outside pull-up resistor R1 is determind on the basic of this value. ex) When control voltage is changed in to 6 V from 5 V. 6 V/5 V ´ 47 k = 56 k To obtain enough mute attenuation, a series resistor, R1 at pin 22 should be 47 kW or more. ATT – VMUTE 20 VCC = 13.2 V f = 1kHz Mute attenuation ATT (dB) 0 5V R1 22 C4 1 kW Mute ON/OFF control RL = 4 W VOUT = 20dBm -20 -40 -60 -80 -100 -120 0 0.5 1 1.5 2 Pin 22 control voltage: VMUTE Figure 4 Muting Function Figure 5 4 2.5 3 (V) Mute Attenuation - VMUTE (V) 2002-11-06 TB2901H 4. High-Side Switch Pin 25 of this device is used in concerned with VCC as a high-side switch which operates with the standby pin. Thus, both the power amp IC and the connected external unit (the hideaway unit) can be turned ON/OFF by using of the standby switch. 5. Pop Noise Suppression Since the AC-GND pin (pin 16) is used as the NF pin for all amps, the ratio between the input capacitance (C1) and the AC-to-GND capacitance (C6) should be 1:4. Also, if the power is turned OFF before the C1 and C6 batteries have been completely charged, pop noise will be generated because of the DC input umbalance. To counteract the noise, it is recommended that a longer charging time be used for C2 as well as for C1 and C6. Note that the time which audio output takes to start will be longer, since the C2 makes the muting time (the time from when the power is turned ON to when audio output starts) is fix. The pop noise which is generated when the muting function is turned ON/OFF will vary according to the time constant of C4. The greater the capacitance, the lower the pop noise. Note that the time from when the mute control signal is applied to C4 to when the muting function is turned ON/OFF will be longer. 6. External Component Constants Component Recommended Name Value Effect Purpose Lower than recommended value Higher than recommended value C1 0.22 mF To eliminate DC Cut-off frequency is increased Cut-off frequency is reduced C2 10 mF To reduce ripple Powering ON/OFF is faster Powering ON/OFF takes longer C3 0.1 mF To provide sufficient oscillation margin Reduces noise and provides sufficient oscillation margin C4 1 mF To reduce pop noise High pop noise. Duration until Low pop noise. Duration until muting function is turned muting function is turned ON/OFF is short ON/OFF is long C5 3900 mF Ripple filter Power supply ripple filtering C6 1 mF NF for all outputs Pop noise is suppressed when C1:C6 = 1:4 Note: Notes Pop noise is generated when VCC is ON Pop noise is generated when VCC is ON If recommended value is not used. 5 2002-11-06 TB2901H Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit VCC (surge) 50 V DC supply voltage VCC (DC) 25 V Operation supply voltage VCC (opr) 18 V Peak supply voltage (0.2 s) Output current (peak) Power dissipation IO (peak) PD (Note 2) 9 A 125 W Operation temperature Topr -40~85 °C Storage temperature Tstg -55~150 °C Note 2: Package thermal resistance qj-T = 1°C/W (typ.) (Ta = 25°C, with infinite heat sink) Electrical Characteristics (unless otherwise specified, VCC = 13.2 V, f = 1 kHz, RL = 4 W, Ta = 25°C) Characteristics Symbol Test Circuit ICCQ ¾ POUT MAX (1) Min Typ. Max Unit VIN = 0 ¾ 200 400 mA ¾ VCC = 14.4 V, max POWER ¾ 47 ¾ POUT MAX (2) ¾ VCC = 13.7 V, max POWER ¾ 43 ¾ POUT (1) ¾ VCC = 14.4 V, THD = 10% ¾ 29 ¾ POUT (2) ¾ THD = 10% 23 25 ¾ POUT MAX (3) ¾ VCC = 14.4 V, max POWER ¾ 80 ¾ POUT MAX (4) ¾ VCC = 13.7 V, max POWER ¾ 77 ¾ POUT (3) ¾ VCC = 14.4 V, THD = 10% ¾ 55 ¾ POUT (4) ¾ THD = 10% 42 45 ¾ THD ¾ POUT = 5 W ¾ 0.015 0.15 % Voltage gain GV ¾ VOUT = 0.775 Vrms 24 26 28 dB Voltage gain ratio DGV ¾ VOUT = 0.775 Vrms -1.0 0 1.0 dB VNO (1) ¾ Rg = 0 W, DIN45405 ¾ 100 ¾ VNO (2) ¾ Rg = 0 W, BW = 20 Hz~20 kHz ¾ 90 200 Ripple rejection ratio R.R. ¾ frip = 100 Hz, Rg = 620 W Vrip = 0.775 Vrms 50 60 ¾ dB Cross talk C.T. ¾ Rg = 620 W VOUT = 0.775 Vrms ¾ 70 ¾ dB VOFFSET ¾ ¾ -150 0 150 mV Input resistance RIN ¾ ¾ ¾ 90 ¾ kW Standby current ISB ¾ Standby condition ¾ 2 10 mA VSB H ¾ POWER: ON 3.5 ¾ 6.0 VSB L ¾ POWER: OFF 0 ¾ 1.5 VM H ¾ MUTE: OFF 3.0 ¾ 6.0 VM L ¾ MUTE: ON, R1 = 47 kW 0 ¾ 0.5 ATT M ¾ MUTE: ON VOUT = 7.75 Vrms®Mute: OFF 80 90 ¾ dB IO ¾ 400 ¾ ¾ mA DVo ¾ ¾ 0.25 0.6 V Quiescent current Output power Output power (RL = 2 W) Total harmonic distortion Output noise voltage Output offset voltage Standby control voltage Mute control voltage Mute attenuation Test Condition W W mVrms V V High-Side Switch Output current Difference voltage between VCC and output IO = 400 mA, +B = 9.6 V 6 2002-11-06 TB2901H 6 VCC2 OUT1 (+) 0.22 mF C1 11 PW-GND1 8 OUT2 (+) C1 12 C6 C1 15 3 14 17 PW-GND3 18 RL 19 21 IN4 PW-GND4 24 OUT4 (-) RL 23 13 H-SW MUTE 4 25 22 C4 1 mF STBY 10 10 mF RIP C2 PRE-GND RL IN3 OUT4 (+) C1 5 16 AC-GND OUT3 (-) 0.22 mF 7 PW-GND2 2 OUT3 (+) 0.1 mF 0.22 RL IN2 OUT2 (-) 1 mF 9 IN1 OUT1 (-) 0.22 mF C3 0.1 mF 20 VCC1 3900 mF 1 TAB C5 Test Circuit 5V 47 kW R1 PLAY MUTE : PRE-GND : PW-GND 7 2002-11-06 TB2901H THD – POUT (ch1) THD – POUT (ch2) 100 50 100 V = 13.2 V VCC CC = 13.2 V 50 RL = 4 W RL = 4 W 測定 ch のみ入力 30 Filter VCC = 13.2 V RL = 4 W 30 Filter Filter 100 Hz : ~30 kHz 100 Hz :: ~300 kHz kHz 1kHz 400 Hz~30 10 1kHz 10 kHz :: 400 400 Hz~30 Hz~ kHz 100 Hz : ~30 kHz 1kHz 10 : 400 Hz~30 kHz 10 kHz : 400 Hz~ 20 kHz : 400 Hz~ 10 kHz kHz :: 400 400 Hz~ Hz~ 20 30 kHz : 400 Hz~ 0.5 0.3 (%) 20 kHz 3 THD 5 1 Total harmonic distortion (%) 1 Total harmonic distortion 3 THD 5 10 kHz 0.1 0.05 0.03 20 kHz 0.5 0.3 10 kHz 0.1 0.05 0.03 1 kHz 1 kHz 0.01 0.01 f = 100 Hz f = 100 Hz 0.005 0.005 0.003 0.003 0.001 0.1 0.3 0.5 1 3 Output power 5 10 POUT 30 50 0.001 0.1 100 0.3 0.5 (W) THD – POUT (ch3) VCC = 13.2 V RL = 4 W 10 50 100 30 50 100 (W) 30 Filter 1kHz 100 Hz : ~30 kHz : 400 Hz~30 kHz 10 1kHz : 400 Hz~30 kHz 10 kHz : 400 Hz~ 20 kHz : 400 Hz~ 0.5 0.3 (%) 20 kHz 3 THD 5 1 Total harmonic distortion (%) 5 THD POUT 30 50 VCC = 13.2 V RL = 4 W 10 kHz : 400 Hz~ Total harmonic distortion 10 THD – POUT (ch4) 100 Hz : ~30 kHz 1 5 100 30 Filter 3 3 Output power 100 50 1 10 kHz 0.1 0.05 0.03 20 kHz : 400 Hz~ 20 kHz 0.5 0.3 10 kHz 0.1 0.05 0.03 1 kHz 1 kHz 0.01 0.01 f = 100 Hz f = 100 Hz 0.005 0.005 0.003 0.001 0.1 0.003 0.3 0.5 1 3 Output power 5 10 POUT 30 50 0.001 0.1 100 (W) 0.3 0.5 1 3 Output power 8 5 10 POUT (W) 2002-11-06 TB2901H THD – POUT (ch1) THD – POUT (ch2) 100 100 50 VCC = 13.2 V RL = 4 W 30 f = 1 kHz 13.2 V 50 VCC = 13.2 V RL = 4 W 30 f = 1 kHz Filter 10 400 Hz~30 kHz 10 (%) 1 THD 1 Total harmonic distortion (%) 3 Total harmonic distortion 400 Hz~30 kHz 5 3 THD 5 0.5 VCC = 9.0 V 0.3 16.0 V 0.1 0.05 0.03 0.5 0.05 0.03 0.005 0.005 0.003 0.003 1 3 Output power 5 10 POUT 30 50 0.001 0.1 100 0.3 0.5 (W) THD – POUT (ch3) 5 10 POUT 30 50 100 (W) THD – POUT (ch4) VCC = 13.2 V RL = 4 W 30 f = 1 kHz 13.2 V 50 VCC = 13.2 V RL = 4 W 30 f = 1 kHz Filter 13.2 V Filter 400 Hz~30 kHz 10 400 Hz~30 kHz (%) 3 1 THD 1 Total harmonic distortion (%) 5 3 THD 5 Total harmonic distortion 3 100 50 0.5 VCC = 9.0 V 0.3 16.0 V 0.1 0.05 0.03 0.5 0.05 0.03 0.005 0.005 0.003 0.003 1 3 Output power 5 10 POUT 30 50 0.001 0.1 100 (W) 0.3 0.5 1 3 Output power 9 16.0 V 0.1 0.01 0.3 0.5 VCC = 9.0 V 0.3 0.01 0.001 0.1 1 Output power 100 10 16.0 V 0.1 0.01 0.3 0.5 VCC = 9.0 V 0.3 0.01 0.001 0.1 13.2 V Filter 5 10 POUT 30 50 100 (W) 2002-11-06 TB2901H muteATT – f R.R. – f -20 0 VCC = 13.2 V VCC = 13.2 V RL = 4 W Ripple rejection ratio R.R. (dB) Mute attenuation muteATT (dB) 0 VOUT = 20dBm -40 -60 -80 1 ch ~4ch -100 -20 RL = 4 W RG = 620 W Vrip =0dBm -40 4ch -60 1ch 3ch -120 10 100 1k frequency 10 k 2ch -80 10 100 k 100 1k f (Hz) frequency GV – f 20 VCC = 13.2 V 10 RL = 4 W VOUT = 0dBm 100 1k frequency 10 k (%) 1 ch ~4ch THD 30 1 0.3 Total harmonic distortion (dB) 10 k 100 k f (Hz) 3 GV Voltage gain 100 k THD – f 40 0 10 10 k f (Hz) POUT = 5 W No filter 0.1 0.03 2ch 4ch 0.01 3ch 1ch 0.003 0.001 10 100 k VCC = 13.2 V RL = 4 W 100 1k frequency 10 f (Hz) 2002-11-06 TB2901H VIN – POUT (ch1) VIN – POUT (ch2) 40 40 1 kHz 1 kHz 30 10 kHz 20 f = 20 kHz POUT (W) 100 Hz Output power Output power POUT (W) 100 Hz VCC = 13.2 V 10 RL = 4 W No filter 0 0 2 4 Input voltage 6 VIN 8 30 10 kHz 20 f = 20 kHz RL = 4 W No filter 0 0 10 VCC = 13.2 V 10 2 (Vrms) 4 Input voltage VIN – POUT (ch3) (Vrms) 1 kHz 100 Hz POUT (W) 100 Hz 10 kHz 30 f = 20 kHz 20 Output power POUT (W) 10 40 1 kHz Output power VIN 8 VIN – POUT (ch4) 40 VCC = 13.2 V 10 RL = 4 W No filter 0 0 6 2 4 Input voltage 6 VIN 8 30 (Vrms) f = 20 kHz 20 VCC = 13.2 V 10 RL = 4 W No filter 0 0 10 10 kHz 2 4 Input voltage 11 6 VIN 8 10 (Vrms) 2002-11-06 TB2901H C.T. – f (ch1) C.T. – f (ch2) 0 0 C.T. (dB) -20 VCC = 13.2 V RL = 4 W VOUT = 0dBm RG = 620 W -40 Cross talk Cross talk C.T. (dB) VCC = 13.2 V ch2 -60 ch3 -20 RL = 4 W VOUT = 0dBm RG = 620 W -40 ch1 -60 ch3 ch4 ch4 -80 10 100 1k frequency 10 k -80 10 100 k 100 f (Hz) frequency C.T. – f (ch3) f (Hz) VCC = 13.2 V C.T. (dB) RL = 4 W VOUT = 0dBm RG = 620 W -40 Cross talk C.T. (dB) 100 k 0 VCC = 13.2 V Cross talk 10 k C.T. – f (ch4) 0 -20 1k ch1 ch2 -60 -20 RL = 4 W VOUT = 0dBm RG = 620 W -40 -60 ch1 ch2 ch4 ch3 -80 10 100 1k frequency 10 k -80 10 100 k f (Hz) 100 1k frequency 12 10 k 100 k f (Hz) 2002-11-06 TB2901H VNO – Rg PD – POUT 300 80 f = 1 kHz (W) Filter RL = 4 W 4ch drive 18 V 60 PD ~20 kHz 200 Power dissipation Output noise voltage VNO (mVrms) VCC = 13.2 V RL = 4 W 1ch~4ch 100 16 V 40 13.2 V 20 9.0 V 0 10 100 1k 10 k 0 0 100 k 10 Signal source resistance Rg (9) Output power VCC = 13.2 V RL = 2 W POmax POUT = 5 W Maximum output power 0.03 0.01 0.003 ch4 ch1 ch3 ch2 0.1 1 frequency 10 18 f = 1 kHz 80 RL = 2 W All drive 40 20 0 8 100 10 f (kHz) 12 (V) ICCQ – VCC PD – POUT 400 f = 1 kHz (W) VCC = 16.0 V RL = ∞ VIN = 0 RL = 2 W All drive (mA) 100 60 Output current ICCQ 80 13.2 V 40 9.0 V 20 10 20 30 Output power 40 POUT/ch 50 60 300 200 100 0 0 0 0 14 Supply voltage VCC 120 PD 16 (W) 60 0.1 0.001 0.01 Power dissipation 25 100 (dB) (%) THD Total harmonic distortion 0.3 POUT 20 POmax – VCC THD – f 3 1 15 70 10 20 Supply voltage VCC (°C) 13 30 (V) 2002-11-06 TB2901H THD – POUT (ch1) THD – POUT (ch2) 100 100 50 VCC = 13.2 V RL = 2 W 30 All drive VCC = 13.2 V 50 THD 5 3 Total harmonic distortion Total harmonic distortion (%) 10 THD (%) 30 RL = 2 W All drive f = 20 kHz 1 0.5 10 kHz 0.3 0.1 1 kHz 10 5 3 f = 20 kHz 1 0.5 10 kHz 0.3 0.1 1 kHz 0.05 0.05 0.03 0.03 100 Hz 0.01 0.1 0.3 0.5 1 3 Output power 100 Hz 5 30 50 10 POUT 0.01 0.1 100 0.3 0.5 (W) 50 0.5 10 kHz 0.3 0.1 10 5 Total harmonic distortion f = 20 kHz 1 (%) 30 3 1 kHz 100 30 50 100 (W) RL = 2 W All drive 3 f = 20 kHz 1 0.5 10 kHz 0.3 0.1 1 kHz 0.05 0.05 0.03 0.03 100 Hz 0.01 0.1 POUT 30 50 VCC = 13.2 V RL = 2 W All drive THD (%) THD Total harmonic distortion 5 10 100 VCC = 13.2 V 10 5 THD – POUT (ch4) THD – POUT (ch3) 30 3 Output power 100 50 1 0.3 0.5 1 3 Output power 5 100 Hz 10 POUT 30 50 0.01 0.1 100 (W) 0.3 0.5 1 3 Output power 14 5 10 POUT (W) 2002-11-06 TB2901H THD – POUT (ch1) THD – POUT (ch2) 100 100 f = 1 kHz f = 1 kHz 50 13.2 V (%) THD 5 3 Total harmonic distortion Total harmonic distortion 30 10 THD (%) 30 50 RL = 2 W All drive 1 0.5 VCC = 9.0 V 0.3 0.1 0.05 13.2 V 10 5 3 1 0.5 0.3 VCC = 9.0 V 0.1 0.05 0.03 0.01 0.1 RL = 2 W All drive 0.03 16.0 V 0.3 0.5 1 3 Output power 5 30 50 10 POUT 0.01 0.1 100 16.0 V 0.3 0.5 (W) 30 10 5 Total harmonic distortion 1 0.5 0.3 VCC = 9.0 V 0.1 (%) 13.2 V 3 0.05 100 (W) RL = 2 W All drive 13.2 V 3 1 0.5 0.3 VCC = 9.0 V 0.1 0.05 0.03 0.01 0.1 POUT 30 50 f = 1 kHz 50 RL = 2 W All drive THD (%) THD Total harmonic distortion 5 10 100 f = 1 kHz 10 5 THD – POUT (ch4) THD – POUT (ch3) 30 3 Output power 100 50 1 0.3 0.5 1 3 Output power 5 10 POUT 30 50 16.0 V 0.03 16.0 V 0.01 0.1 100 (W) 0.3 0.5 1 3 Output power 15 5 10 POUT 30 50 100 (W) 2002-11-06 TB2901H Package Dimensions Weight: 7.7 g (typ.) 16 2002-11-06 TB2901H RESTRICTIONS ON PRODUCT USE 000707EBF · TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc.. · The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk. · This product generates heat during normal operation. However, substandard performance or malfunction may cause the product and its peripherals to reach abnormally high temperatures. The product is often the final stage (the external output stage) of a circuit. Substandard performance or malfunction of the destination device to which the circuit supplies output may cause damage to the circuit or to the product. · The products described in this document are subject to the foreign exchange and foreign trade laws. · The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. · The information contained herein is subject to change without notice. 17 2002-11-06