BD5446EFV

Middle Power Class-D Speaker Amplifiers Class-D Speaker Amplifier for Digital Input BD5446EFV No.10075EBT14 ●Description BD5446EFV is a Class D Speaker Amplifier designed for Flat-panel TVs in particular for space-saving and low-power consumption, delivers an output power of 20W+20W. This IC employs state-of-the-art Bipolar, CMOS, and DMOS (BCD) process technology that eliminates turn-on resistance in the output power stage and internal loss due to line resistances up to an ultimate level. With this technology, the IC can achieve high efficiency of 87% (10W+10W output with 8Ω load). In addition, the IC is packaged in a compact reverse heat radiation type power package to achieve low power consumption and low heat generation and eliminates necessity of external heat-sink up to a total output power of 40W. This product satisfies both needs for drastic downsizing, low-profile structures and many function, high quality playback of sound system. ●Features 1) BD5446EFV has two system of digital audio interface. 2 (I S/LJ format, SDATA: 16 / 20 / 24bit, LRCLK: 32kHz / 44.1kHz / 48kHz, BCLK: 64fs (fixed), SYS_CLK: 256fs (fixed)) 2) Within the wide range of the power supply voltage, it is possible to operate in a single power supply. (10~26V) 3) It contributes to miniaturizing, making to the thin type, and the power saving of the system by high efficiency and low heat. 4) S/N of the system can be optimized by adjusting the gain setting among 8 steps. (20~34dB / 2dB step) 5) It has the output power limitation function that can be adjusted to an arbitrary output power. 6) The decrease in sound quality because of the change of the power supply voltage is prevented with the feedback circuitry of the output. In addition, a low noise and low distortion are achieved. 7) It provides with the best stereo DAC output for the headphone usage. As a result, the output of the selection of the digital input in two systems is possible. 8) Eliminates pop noise generated when the power supply goes on/off, or when the power supply is suddenly shut off. High quality muting performance is realized by using the soft-muting technology. 9) BD5446EFV is a highly reliable design to which it has various protection functions. (High temperature protection, Under voltage protection, Output short protection, Output DC voltage protection and Clock stop protection) ●Applications Flat Panel TVs (LCD, Plasma), Home Audio, Desktop PC, Amusement equipments, Electronic Music equipments, etc., www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/30 2010.05 - Rev.B BD5446EFV ●Absolute maximum ratings (Ta=25℃) Parameter Symbol Supply voltage Power dissipation Input voltage Open-drain terminal voltage Operating temperature range Storage temperature range Maximum junction temperature VCC Pd VIN VERR Topr Tstg Tjmax Technical Note Ratings 30 2.0 4.5 6.2 -0.3 ~ 4.5 -0.3 ~ 30 -25 ~ +85 -55 ~ +150 +150 Unit V W W W V V ℃ ℃ ℃ *3 *4 *5 Conditions Pin 25, 28, 29, 53, 54 *1 *2 Pin 7 ~ 18, 21 Pin24 *1 *1 *1 The voltage that can be applied reference to GND (Pin 6, 36, 37, 45, 46). *2 Do not, however exceed Pd and Tjmax=150℃. *3 70mm×70mm×1.6mm, FR4, 1-layer glass epoxy board (Copper on bottom layer 0%) Derating in done at 16mW/℃ for operating above Ta＝25℃. *4 70mm×70mm×1.6mm, FR4, 2-layer glass epoxy board (Copper on bottom layer 100%) Derating in done at 36mW/℃ for operating above Ta＝25℃. There are thermal via on the board. *5 70mm×70mm×1.6mm, FR4, 4-layer glass epoxy board (Copper on bottom layer 100%) Derating in done at 49.6mW/℃ for operating above Ta＝25℃. There are thermal via on the board. ●Operating conditions (Ta=25℃) Parameter Supply voltage Minimum load impedance (Speaker Output) Minimum load impedance (DAC Output) *6 Do not, however exceed Pd. * No radiation-proof design. Symbol VCC RL_SP RL_DA Ratings 10 ~ 26 5.4 20 Unit V Ω kΩ Conditions Pin 25, 28, 29, 53, 54 *6 Pin 22, 23 *1 *2 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 2/30 2010.05 - Rev.B BD5446EFV Technical Note ●Electrical characteristics (Unless otherwise specified Ta=25℃,Vcc=13V,f=1kHz,RL_SP=8Ω,RL_DA=20kΩ,RESETX=3.3V,MUTEX=3.3V,PDX=3.3V, Gain=20dB,fs=48kHz) Limits Item Symbol Unit Conditions Min Typ Max Total circuit Circuit current Circuit current (Power down mode) Open-drain terminal Low level voltage Regulator output voltage 1 Regulator output voltage 2 High level input voltage Low level input voltage Input current (Input pull-down terminal) Speaker Output Maximum momentary output power 1 Maximum momentary output power 2 Total harmonic distortion Crosstalk Output noise voltage (Sampling mode) Residual noise voltage (Mute mode) ICC1 ICC2 VERR VREG_G VREG_3 VIH VIL IIH 5.0 3.0 2.5 0 33 45 1.5 5.5 3.3 66 90 3 0.8 6.0 3.6 3.3 0.8 132 mA mA V V V V V µA Pin 25, 28, 29, 53, 54 No load Pin 25, 28, 29, 53, 54,No load RESETX=0V,MUTEX=0V,PDX=0V Pin 24,IO=0.5mA Pin 1, 27 Pin 5 Pin 7 ~ 18, 21 Pin 7 ~ 18, 21 Pin 7 ~ 18, 21,VIN = 3.3V THD+n=10% GAIN=26dB VCC=18V, THD+n=10% GAIN =26dB PO=1W, BW=20~20kHz PO=1W, BW=IHF-A PO1 PO2 THDSP CTSP VNO_SP VNOR_SP fPWM1 65 - 10 20 0.07 80 140 5 512 705.6 768 280 10 - W W % dB *7 *7 *7 *7 *7 *7 *7 *7 *7 µVrms -∞dBFS, BW=IHF-A µVrms MUTEX=0V,-∞dBFS, BW=IHF-A KHz KHz KHz fs=32kHz fs=44.1kHz fs=48kHz PWM sampling frequency fPWM2 fPWM3 DAC Output Maximum output voltage Channel Balance Total harmonic distortion Crosstalk Output noise voltage Residual noise voltage VOMAX CB THDDA CTDA VNO_DA VNOR_DA 0.85 -1 65 1.0 0 0.05 80 10 3 1 0.5 20 10 Vrms dB % dB 0dBFS,THD+n=1% 0dBFS -20dBFS,BW=20~20kHz 0dBFS,BW=IHF-A µVrms -∞dBFS, BW=IHF-A µVrms MUTEX=0V,PDX=0V, -∞dBFS, BW=IHF-A *7 These items show the typical performance of device and depend on board layout, parts, and power supply. The standard value is in mounting device and parts on surface of ROHM’s board directly. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 3/30 2010.05 - Rev.B BD5446EFV Technical Note ●Electrical characteristic curves(VCC=13V,Ta=25℃,RL_SP=8Ω,RL_DA=20kΩ,Gain=20dB,fin=1kHz,fs=48kHz) Measured by ROHM designed 4 layer board. 100 90 80 70 ICC(mA) 60 50 40 30 20 10 0 8 10 12 14 16 18 20 22 24 26 28 VCC(V) Sampling Mute 44 40 36 32 28 24 20 16 12 8 4 0 3 OUTPUT POWER(W/ch) THD=10% 2 ICC(A) VCC=13V VCC=18V 1 THD=1% 0 8 10 12 14 16 18 20 22 24 26 28 VCC(V) 0 5 10 15 20 25 30 35 40 TOTAL OUTPUT POWER(W) Fig.1 Current consumption - Power supply voltage 100 90 Fig.2 Output power - Power supply voltage 30 28 26 24 22 20 18 16 14 12 10 10 0 Fig.3 Current consumption - Output power VOLTAGE GAIN(dB) 80 EFFICIENCY(%) 70 60 50 40 30 20 10 0 0 2 4 6 8 10 12 OUTPUT PO WER(W/ch) NOISE FFT(dBV) Po=1W L=22µH C=0.47µF Cg=0.068µF -20 -40 -60 -80 -100 -120 -140 Without signal BW=20～20KHz 100 1k 10k 100k 10 100 1k 10k 100k FREQUENCY(Hz) FREQUENCY(Hz) Fig.4 Efficiency - Output power Fig.5 Voltage gain - Frequency Fig.6 FFT of Output noise voltage 100 100 BW=20～20KHz 10 THD+N(%) THD+N(%) 10 1 Po=1W BW=20～20KHz CROSSTALK(dB) 1 6KHz 1KHz 100Hz 0.1 1 10 100 0.1 0.1 0.01 10 100 1k 10k 100k 0.01 0.001 0.01 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 BW=20～20KHz 0.001 0.01 0.1 1 10 OUTPUT POWER(W) FREQUENCY(Hz) OUTPUT POWER(W) Fig.7 THD+N - Output power Fig.8 THD+N - Frequency Fig.9 Crosstalk - Output power 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 10 Po=1W BW=20～20KHz fin=300Hz Po=3.3W 5V/div Speaker output Speaker output fin=300Hz Po=3.3W 5V/div CROSSTALK(dB) 2V/div MUTEX 10ms/div MUTEX 2V/div 10ms/div 100 1k 10k 100k FREQUENCY(Hz) Fig.10 Crosstalk –Frequency Fig.11 Wave form when Releasing Soft-mute Fig.12 Wave form when Activating Soft-mute www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4/30 2010.05 - Rev.B BD5446EFV Technical Note ●Electrical characteristic curves(VCC=18V,Ta=25℃,RL_SP=8Ω,RL_DA=20kΩ,Gain=20dB,fin=1kHz,fs=48kHz) Measured by ROHM designed 4layer board. 100 90 80 EFFICIENCY(%) 70 60 50 40 30 20 10 0 0 5 10 15 20 OUTPUT POWER(W /ch) 40 38 VOLTAGE GAIN(dB) 0 -20 NOISE FFT(dBV) 36 34 32 30 28 26 24 22 20 10 Without signal BW=20～20KHz Po=1W L=22µH C=0.47µF Cg=0.068µF -40 -60 -80 -100 -120 -140 100 1k 10k 100k 10 100 1k 10k 100k FREQUENCY(Hz) FREQUENCY(Hz) Fig.13 Efficiency – Output power Fig.14 Voltage gain - Frequency Fig.15 FFT of output noise voltage 100 100 BW=20～20KHz 10 THD+N(%) THD+N(%) 10 Po=1W BW=20～20KHz CROSSTALK(dB) 1 6KHz 1KHz 100Hz 1 0.1 0.1 0.01 0.001 0.01 0.1 1 10 100 OUTPUT POWER(W) 0.01 10 100 1k 10k 100k FREQUENCY(Hz) 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 BW=20～20KHz 0.001 0.01 0.1 1 10 100 OUTPUT POWER(W) Fig.16 THD+N - Output power Fig.17 THD+N - Frequency Fig.18 Crosstalk - Output power 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 10 Po=1W BW=20～20KHz CROSSTALK(dB) 100 1k 10k 100k FREQUENCY(Hz) Fig.19 Crosstalk - Frequency www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 5/30 2010.05 - Rev.B BD5446EFV ●Pin configuration and Block diagram Technical Note 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 REG_G1 FILP Power Limiter FILA REG_3 VCCP1 54 53 NC 52 51 50 REG_G1 GNDA Driver 1P 49 NC 48 NC 47 I2S/LJ Interface Driver 1N GNDP1 46 45 44 43 Control Interface ×8 Over Sampling Digital Filter PWM Modulator REG_G1 42 NC 41 40 REG_G2 39 I2S/LJ Selector Gain Selector Driver 2N TEST GNDP2 38 37 36 20 21 22 DAC 23 24 25 26 27 REG_G2 NC VCCA High Temperature Protection Under Voltage Protection Clock Stop Protection Output Short Protection Output DC Voltage Protection VCCP2 DAC Selector Driver 2P NC 35 NC 34 33 REG_G2 32 31 NC 30 29 28 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 6/30 2010.05 - Rev.B BD5446EFV ●Pin function explanation (Provided pin voltages are typ. Values) No. Pin name Pin voltage Pin explanation Technical Note Internal equivalence circuit 53,54 28,29 1 27 REG_G1 REG_G2 5.5V Internal power supply pin for ch1 Gate driver Internal power supply pin for ch2 Gate driver Please connect the capacitor. 1 27 550K 45,46 36,37 25 Bias pin for PWM signal 2 FILP 1.75V~2.55V Please connect the capacitor. 2 6 25 3 PLMT 0V Power limiter setting terminal 3 400K 6 27 4 Bias pin for Analog signal FILA 2.5V Please connect the capacitor. 6 4 50K 50K 25 Internal power supply pin for Digital circuit 5 REG3 3.3V Please connect the capacitor. 6 5 500K 6 GNDA 0V GND pin for Analog signal － www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/30 2010.05 - Rev.B BD5446EFV Technical Note No. Pin name Pin voltage Pin explanation Internal equivalence circuit 5 7 8 9 10 11 SYS_CLK BCLK LRCLK SDATA1 SDATA2 0V Digital audio signal input pin 7,8,9 10,11 50K 6 12 RESETX Reset pin for Digital circuit H: Reset OFF L: Reset ON 0V Speaker output mute control pin H: Mute OFF L: Mute ON Power down control pin H: Power down OFF L: Power down ON 5 13 MUTEX PDX 12,13,14 50K 6 14 5 Digital audio signal data format setting terminal 15 IIS_LJ 0V H: Left Justified format 2 L: I S format 15 50K 6 5 16 17 18 GAIN1 GAIN2 GAIN3 Gain setting terminal 0V Gain=20dB~34dB, 2dB step 16,17,18 50K 6 5 19 20 TEST1 TEST2 Test pin 0V Please connect to GND. 6 19,20 50K 5 DAC output selection terminal 21 SEL_DAC 0V H: SDATA2 is output from the DAC L: SDATA1 is output from the DAC 21 50K 6 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 8/30 2010.05 - Rev.B BD5446EFV Technical Note No. Pin name Pin voltage Pin explanation Internal equivalence circuit 25 22 23 OUT_DAC2 OUT_DAC1 ch2 DAC output pin ch1 DAC output pin 2.5V 22,23 50K 6 Please connect it with the latter part circuit through the capacitor. 25 Error flag pin 500 24 ERROR 3.3V Please connect pull-up resistor. H: While Normal L: While Error 24 6 25 VCCA VCC Power supply pin for Analog signal － 26,30 34,35 41,47 48,52 N.C. － Non connection pin － www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 9/30 2010.05 - Rev.B BD5446EFV Technical Note No. 28,29 31,32 33 36,37 38,39 40 42 43,44 45,46 49 50,51 53,54 Pin name VCCP2 OUT2P BSP2P Pin voltage Vcc Vcc~0V － 0V Vcc~0V － － Vcc~0V 0V － Vcc~0V － Pin explanation Power supply pin for ch2 PWM signal Internal equivalence circuit 28,29 Output pin of ch2 positive PWM Please connect to Output LPF. Boot-strap pin of ch2 positive Please connect the capacitor. GND pin for ch2 PWM signal Output pin of ch2 negative PWM Please connect to Output LPF. Boot-strap pin of ch2 negative Please connect the capacitor. Boot-strap pin of ch1 negative Please connect the capacitor. Output pin of ch1 negative PWM Please connect to Output LPF. GND pin for ch1 PWM signal Boot-strap pin of ch1 positive Please connect the capacitor. Output pin of ch1 positive PWM Please connect to Output LPF. Power supply pin for ch1 PWM signal 33 40 31,32 38,39 GNDP2 OUT2N BSP2N BSP1N OUT1N GNDP1 BSP1P OUT1P VCCP1 36,37 53,54 42 49 43,44 50,51 45,46 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 10/30 2010.05 - Rev.B BD5446EFV ●GAIN1 pin, GAIN2 pin, GAIN3 pin function GAIN3 (18pin) L L L L H H H H GAIN2 (17pin) L L H H L L H H GAIN1 (16pin) L H L H L H L H Speaker output gain 20dB 22dB 24dB 26dB 28dB 30dB 32dB 34dB Technical Note ●SEL_DAC pin function SEL_DAC (21pin) L H OUT_DAC1 (23pin) The Lch signal of SDATA1 is output The Lch signal of SDATA2 is output OUT_DAC2 (24pin) The Rch signal of SDATA1 is output The Rch signal of SDATA2 is output ●RESETX pin function RESETX (10pin) L H ●RESETX pin RESETX (12pin) L H State of Digital block Reset ON Reset OFF State of Digital block Reset ON Reset OFF ●PDX pin,MUTEX pin function PDX (12pin) L H H MUTEX (11pin) L or H L H Power Down ON OFF DAC output (24,25pin) HiZ_Low Normal operation PWM output (33,34,38,39,43,44,48pin) HiZ_Low Normal operation ●IIS_LJ pin function IIS_LJ (15pin) L H Digital data format I2S Left Justified www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 11/30 2010.05 - Rev.B BD5446EFV Technical Note ●Input digital audio signal sampling frequency (fs) explanation PWM sampling frequency, Soft-start, Soft-mute time, and the detection time of the DC voltage protection in the speaker depends on sampling frequency (fs) of the digital audio input. Sampling frequency of the digital audio input (fs) 32kHz 44.1kHz 48kHz PWM sampling frequency (fpwm) 512kHz 705.6kHz 768kHz DC voltage protection in the speaker detection time 64msec. 46msec. 43msec. Soft-start / Soft-mute time 64msec. 46msec. 43msec. ●For voltage gain (Gain setting) BD5446EFV prescribe voltage gain at speaker output (BTL output) under the definition 0dBV (1Vrms) as full scale input of the digital audio input signal. For example, digital audio input signal = Full scale input, Gain setting = 20dB, Load resistance 2 RL_SP = 8Ω will give speaker output (BTL output) amplitude as Vo=10Vrms. (Output power Po = Vo /RL_SP = 12.5W ) ●Speaker output and DAC output Digital audio input signal SDATA1 will be output to the speaker. (SDATA2 will not be output to the speaker. DAC output can be selected either from digital audio input signal SDATA1 or SDATA2.) ●Format of digital audio input ・SYS_CLK: It is System Clock input signal. It will input LRCLK, BCLK, SDATA1 (SDATA2) that synchronizes with this clock that are 256 times of sampling frequency (256fs). ・LRCLK: It is L/R clock input signal. It corresponds to 32kHz/44.1kHz/48kHz with those clock (fs) that are same to the sampling frequency (fs) . The data of a left channel and a right channel for one sample is input to this section. ・BCLK: It is Bit Clock input signal. It is used for the latch of data in every one bit by sampling frequency’s 64 times sampling frequency (64fs). ・SDATA1 & SDATA2: It is Data input signal. It is amplitude data. The data length is different according to the resolution of the input digital audio data. It corresponds to 16/ 20/ 24 bit. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 12/30 2010.05 - Rev.B BD5446EFV ●I2S data format LRCLK Technical Note 1/64fs Lch Rch BCLK SDATA1 (SDATA2) MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 765432 1 LSB 32 clocks 32 clocks Fig.20 I2S Data Format 64fs, 24 bit Data LRCLK Lch Rch BCLK SDATA1 (SDATA2) MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB Fig.21 I2S Data Format 64fs, 20 bit Data LRCLK Lch Rch BCLK SDATA1 (SDATA2) MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB Fig.22 I S Data Format 64fs, 16 bit Data 2 The Low section of LRCLK becomes Lch, the High section of LRCLK becomes Rch. After changing LRCLK, second bit becomes MSB. ●Left-justified format LRCLK 1/64fs Lch Rch BCLK SDATA1 (SDATA2) MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 765432 1 LSB MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7654321 LSB 32 clocks 32 clocks Fig.23 Left-Justified Data Format 64fs, 24 bit Data LRCLK Lch Rch BCLK SDATA1 (SDATA2) MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB Fig.24 Left-Justified Data Format 64fs, 20 bit Data LRCLK Lch Rch BCLK SDATA1 (SDATA2) MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB Fig.25 Left-Justified Data Format 64fs, 16 bit Data The High section of LRCLK becomes Lch, the Low section of LRCLK becomes Rch. After changing LRCLK, first bit becomes MSB. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 13/30 2010.05 - Rev.B BD5446EFV ●Power supply start-up sequence Technical Note VCCA (25pin) VCCP1 (53, 54pin) VCCP2 (28, 29pin) ①Power up VCCA, VCCP1, VCCP2 simultaneously. t REG_3 (5pin) REG_G1 (1pin) REG_G2 (27pin) REG_G1, REG_G2 REG_3 t RESETX (12pin) ②Set RESETX to High after power up. t SYS_CLK (7pin) BCLK (8pin) LRCLK (9pin) SDATA1 (10pin) SDATA2 (11pin) ③Degital audio data communication. t PDX (14pin) ④Set PDX to High. t OUT_DAC1 (23pin) OUT_DAC2 (22pin) t MUTEX (13pin) ⑤Set MUTEX to High. t Soft-start 43msec(fs=48kHz) Speaker output t www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 14/30 2010.05 - Rev.B BD5446EFV ●Power supply shut-down sequence VCCA (25pin) VCCP1 (53, 54pin) VCCP2 (28, 29pin) Technical Note ⑤Power down VCCA, VCCP1, VCCP2, simultaneously. t REG_3 (5pin) REG_G1 (1pin) REG_G2 (27pin) REG_G1, REG_G2 REG_3 t RESETX (12pin) ④Set RESETX to Low t SYS_CLK (7pin) BCLK (8pin) LRCLK (9pin) SDATA1 (10pin) SDATA2 (11pin) ③Stop digital audio date signal. t PDX (14pin) ②Set PDX to Low. t OUT_DAC1 (23pin) OUT_DAC2 (22pin) t MUTEX (13pin) ①Set MUTEX to Low. t Soft-mute 43msec(fs=48kHz) t www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 15/30 2010.05 - Rev.B BD5446EFV ●About the protection function DAC Output Technical Note Protection function Output short protection DC voltage protection in the speaker High temperature protection Detecting condition Detecting condition Detecting condition Releasing condition Detecting condition Releasing condition Detecting condition Releasing condition Detecting & Releasing condition Detecting current = 10A (TYP.) PWM output Duty=0% or 100% 43msec(fs=48kHz) above fixed Chip temperature to be above 150℃ (TYP.) Chip temperature to be below 120℃ (TYP.) Power supply voltage to be below 8V (TYP.) Power supply voltage to be above 9V (TYP.) No change to SYS_CLK more than 1usec (TYP.) Normal input to SYS_CLK PWM Output HiZ_Low (Latch) HiZ_Low (Latch) HiZ_Low Normal operation HiZ_Low Normal operation HiZ_Low Normal operation ERROR Output L (Latch) L (Latch) Normal operation Normal operation H Under voltage protection Normal operation Irregular output Normal operation H Clock stop protection H * The ERROR pin is Nch open-drain output. * Once an IC is latched, the circuit is not released automatically even after an abnormal status is removed. The following procedures ① or ② is available for recovery. ①After the MUTEX pin is made Low once, the MUTEX pin is returned to High again. ②Turning on the power supply again. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 16/30 2010.05 - Rev.B BD5446EFV Technical Note 1) High temperature protection This IC has the high temperature protection circuit that prevents thermal reckless driving under an abnormal state for the temperature of the chip to exceed Tjmax=150℃. Detecting condition - It will detect when MUTE pin is set High and the temperature of the chip becomes 150℃(TYP.) or more. The speaker output is muted through a soft-mute when detected. Releasing condition - It will release when MUTE pin is set High and the temperature of the chip becomes 120℃(TYP.) or less. The speaker output is outputted through a soft-start when released. Temperature of IC chip junction(℃) 150℃ 120℃ t OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) HiZ-Low t Soft-mute 43msec(fs=48KHz) Speaker output Soft-start 43msec(fs=48KHz) t ERROR (24pin) 3.3V t OUT_DAC1 (23pin) OUT_DAC2 (22pin) t www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 17/30 2010.05 - Rev.B BD5446EFV Technical Note 2) Under voltage protection This IC has the under voltage protection circuit that make speaker output mute once detecting extreme drop of the power supply voltage. Detecting condition – It will detect when MUTE pin is set High and the power supply voltage becomes lower than 8V. The speaker output is muted through a soft-mute when detected. Releasing condition – It will release when MUTE pin is set High and the power supply voltage becomes more than 9V. The speaker output is outputted through a soft-start when released. VCCA (25pin) VCCP1 (53, 54pin) VCCP2 (28, 29pin) 9V 8V t OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) HiZ-Low t Soft-mute 43msec(fs=48kHz) Speaker output Soft-start 43msec(fs=48kHz) t ERROR (24pin) 3.3V t OUT_DAC1 (23pin) OUT_DAC2 (22pin) t www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 18/30 2010.05 - Rev.B BD5446EFV Technical Note 3) Clock stop protection This IC has the clock stop protection circuit that make the speaker output mute when the SYS_CLK signal of the digital audio input stops. Detecting condition - It will detect when MUTE pin is set High and the SYS_CLK signal stops for about 1usec or more. The speaker output is muted through a soft-mute when detected. Releasing condition - It will release when MUTE pin is set High and the SYS_CLK signal returns to the normal clock operation. The speaker output is outputted through a soft-start when released. Clock stop Clock recover SYS_CLK (7pin) t Protection start with about 1μsec clock stop. OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) HiZ-Low t Soft-start 43msec(fs=48kHz) Speaker output t ERROR (24pin) 3.3V t OUT_DAC1 (23pin) OUT_DAC2 (22pin) Unstable t www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 19/30 2010.05 - Rev.B BD5446EFV Technical Note 4)Output short protection(Short to the power supply) This IC has the PWM output short protection circuit that stops the PWM output when the PWM output is short-circuited to the power supply due to abnormality. Detecting condition - It will detect when MUTE pin is set High and the current that flows in the PWM output pin becomes 10A(TYP.) or more. The PWM output instantaneously enters the state of HiZ-Low if detected, and IC does the latch. Releasing method - ①After the MUTEX pin is set Low once, the MUTEX pin is set High again. ②Turning on the power supply again. Short to VCC Release from short to VCC OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) t PWM out ：　IC latches with HiZ-Low. Over current Released from latch state. 10A(TYP.) t ERROR (24pin) t １μsec(TYP.) MUTEX（13pin） Latch release t 5) Output short protection(Short to GND) This IC has the PWM output short protection circuit that stops the PWM output when the PWM output is short-circuited to GND due to abnormality. Detecting condition - It will detect when MUTE pin is set High and the current that flows in the PWM output terminal becomes 10A(TYP.) or more. The PWM output instantaneously enters the state of HiZ-Low if detected, and IC does the latch. Releasing method – ①After the MUTEX pin is set Low once, the MUTEX pin is set High again. ②Turning on the power supply again. Short to GND Release from short to GND OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) t PWM out ：　IC latches with HiZ-Low. Over current Released from latch state. 10A(TYP.) t ERROR (24pin) t １μsec(TYP.) MUTEX(13pin) Latch release t www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 20/30 2010.05 - Rev.B BD5446EFV Technical Note 6) DC voltage protection in the speaker When the DC voltage in the speaker is impressed due to abnormality, this IC has the protection circuit where the speaker is defended from destruction. Detecting condition - It will detect when MUTE pin is set High or Low and PWM output Duty=0% or 100% , 43msec(fs=48kHz) or above. Once detected, The PWM output instantaneously enters the state of HiZ-Low, and IC does the latch. Releasing method – ①After the MUTEX pin is set Low once, the MUTEX pin is set High again. ②Turning on the power supply again PWM out locked duty=100% abnormal state. Abnormal state release. OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) t PWM output ：　IC latche with HiZ-Low. Speaker output Latch release state. t Soft-start Protection start surge current into speaker output for 43msec (fs=48kHz) and over. ERROR (24pin) 43msec(fs=48kHz) t MUTEX(13pin) Latch release t www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 21/30 2010.05 - Rev.B BD5446EFV Technical Note ●Output power limiter function This IC is provided with an output power limiter function to protect speakers from destruction by an excessive output. Limiter values are freely specified by changing external resistors R1/R2 as shown in Fig-26. Fig-27 shows a speaker output waveform that is generated with use of the output limiter function. Because the waveform is soft-clipped, unusual noises on audible signals are significantly reduced under operation of limiter. Use resistors with a high degree of accuracy for R1 and R2 (±1% or higher accuracy is recommended). The capacitor C is for the noise removal of output power limitation terminal (3pin). Provide grounding with a 1µF capacitor. Specify a resistor of 10kΩ or higher resistor R1 and R2. If the output power limiter function is not used, R1, R2 and C is unnecessary. However, connect 3pin with GNDA. Power Limiter 3 R1 R2 C 1μF REG_3 5 5pin 3.3V 1μF Speaker output Soft Clip Fig-27 GNDA Fig-26 10 9 OUTPUT POWER(W/ch) . 8 7 6 5 4 3 2 1 0 1 1.2 1.4 1.6 1.8 2 VCC=13V, RL=8Ω, f=1kHz Gain=20dB, 5pin=3.3V 3pin terminal voltage [V] Fig.28 Output power – 3pin terminal voltage www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 22/30 2010.05 - Rev.B BD5446EFV ●Application Circuit Example(RL_SP=8Ω) Technical Note C1 3.3μF GNDP1 C2 1μF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 TEST VSS VSS OUT_DAC2 (Rch) OUT_DAC1 (Lch) ERROR VCCA GNDA GNDA GNDP2 3.3μF C27 26 10μF C25D 27 REG_G2 NC 1μF C22 1μFC23 100kΩ C25 0.1μF 3.3V 24 25 VCCA High Temperature Protection Under Voltage Protection Clock Stop Protection Output Short Protection Output DC Voltage Protection 20 21 22 DAC 23 DAC Selector Driver 2P Gain Selector Driver 2N I2S/LJ Selector Control Interface ×8 Over Sampling Digital Filter PWM Modulator I2S/LJ Interface Driver 1N REG_G1 FILP Power Limiter FILA REG_3 VCCP1 VCCP1 54 53 NC 52 51 50 L50 22μH C4 1μF C5 1μF GNDA SYS_CLK (256fs) BCLK (64fs) Digital Audio Source () ( ( ) ) REG_G1 GNDA Driver 1P 49 NC 48 NC 47 46 45 GNDP1 C49 1μF 0.068μF 470pF C50B C50A C53 1μF C53D 5.6Ω 220μF R50B 0.33μF C43C 8Ω Lch (SDATA1) LRCLK (fs=32kHz～48kHz) SDATA1 SDATA2 RESETＸ R43B GNDP1 5.6Ω C43B 470pF C43A GNDP1 0.068μF 44 43 REG_G1 42 NC 41 40 REG_G2 39 38 GNDP2 0.068μF C38A 470pF C38B 5.6Ω R38B 1μF 220μF C28D R31B GNDP2 5.6Ω C31B 470pF 0.068μF C31A C42 1μF 22μH L43 μ-con MUTEＸ PDX 3.3V 1μF C38 L38 22μH 37 36 GNDP2 NC 35 NC 34 33 REG_G2 32 31 NC 30 29 VCCP2 28 VCCP2 1μF C31 C28 0.33μF C31C 8Ω Rch (SDATA1) R24 22μH L31 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 23/30 2010.05 - Rev.B BD5446EFV ●BOM list(RL_SP=8Ω) Parts IC Parts No. U1 Value Company ROHM TOKO Inductor L31, L38, L43, L50 22μH SAGAMI Resistor R31B, R38B R43B, R50B C31, C38, C42, C49 C25, C28, C53 C31A, C38A C43A, C50A Capacitor C31C, C43C C1, C27 C2, C4, C5 C22, C23 C31B, C38B C43B, C50B C28D, C53D C25D 5.6Ω 1μF 0.1μF 0.068μF 0.33μF 3.3μF 1μF 470pF 220μF Panasonic 10μF EEUFC1H100L 50V ±20% MURATA ROHM DBE7210H-220M MCR18PZHZFL5R60 GRM185B31C105KE43 GRM188B31H104KA92 GRM21BB11H683KA01 GRM219B31H334KA87 GRM188B31A335KE15 GRM185B30J105KE25 GRM188B11H471KA ECA1VMH221 - Technical Note Product No. BD5446EFV 1168ER-0001 Rated Voltage － Tolerance Size 18.5mm×9.5mm 10.3mm×7.6mm 10.5mm×6.4mm 3.2mm×1.6mm 1.6mm×0.8mm 1.6mm×0.8mm 2.0mm×1.25mm 2.0mm×1.25mm 1.6mm×0.8mm 1.6mm×0.8mm 2.0mm×1.2mm φ8mm×11.5mm φ5mm×11mm － － - (±20%) (±20%) F(±1%) B(±10%） B(±10%） B(±10%） B(±10%） B(±10%） B(±10%） B(±10%） ±20% 1/4W 16V 50V 50V 50V 10V 6.3V 50V 35V Electrolytic Capacitor www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 24/30 2010.05 - Rev.B BD5446EFV ●Application Circuit Example(RL_SP=6Ω) Technical Note C1 3.3μF GNDP1 C2 1μF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 TEST VSS VSS OUT_DAC2 (Rch) OUT_DAC1 (Lch) ERROR VCCA GNDA GNDA GNDP2 3.3μF C27 26 10μF C25D 27 REG_G2 NC 1μF C22 1μFC23 100kΩ C25 0.1μF 3.3V 24 25 VCCA High Temperature Protection Under Voltage Protection Clock Stop Protection Output Short Protection Output DC Voltage Protection 20 21 22 DAC 23 DAC Selector Driver 2P Gain Selector Driver 2N I2S/LJ Selector Control Interface ×8 Over Sampling Digital Filter PWM Modulator I2S/LJ Interface Driver 1N REG_G1 FILP Power Limiter FILA REG_3 VCCP1 VCCP1 54 53 NC 52 51 50 L50 15μH C4 1μF C5 1μF GNDA SYS_CLK (256fs) BCLK (64fs) Digital Audio Source () ( ( ) ) REG_G1 GNDA Driver 1P 49 NC 48 NC 47 46 45 GNDP1 C49 1μF 0.1μF C50A 470pF C50B C53D 5.6Ω 220μF R50B C53 1μF 0.47μF C43C 6Ω Lch (SDATA1) LRCLK (fs=32kHz～48kHz) SDATA1 SDATA2 RESETＸ R43B GNDP1 5.6Ω C43B 470pF C43A GNDP1 0.1μF 44 43 REG_G1 42 NC 41 40 REG_G2 39 38 GNDP2 C42 1μF 15μH L43 μ-con MUTEＸ PDX 3.3V 1μF C38 L38 15μH 37 36 0.1μF C38A 470pF C38B 5.6Ω R38B GNDP2 NC 35 1μF 220μF C28D 0.47μF C31C 6Ω Rch (SDATA1) NC 34 33 REG_G2 32 31 NC 30 29 VCCP2 28 C28 R31B GNDP2 5.6Ω C31B 470pF 0.1μF C31A 1μF C31 R24 15μH L31 VCCP2 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 25/30 2010.05 - Rev.B BD5446EFV ●BOM list(RL_SP=6Ω) Parts IC Inductor Resistor Parts No. U1 L31, L38, L43, L50 R31B, R38B R43B, R50B C31, C38, C42, C49 C25, C28, C53, C31A, C38A, C43A, C48A C31C, C43C Capacitor C1, C27 C2, C4, C5 C22, C23 C31B, C38B C43B, C50B C28D, C53D C25D 3.3μF 1μF 470pF 220μF Panasonic 10μF EEUFC1H100L 50V ±20% Value Company ROHM SAGAMI ROHM Product No. BD5446EFV DBE7210H-150M MCR18PZHZFL5R60 GRM185B31C105KE43 GRM188B31H104KA92 GRM21BB31H474KA87 MURATA GRM188B31A335KE15 GRM185B30J105KE25 GRM188B11H471KA ECA1VMH221 10V 6.3V 50V 35V Rated Voltage － Technical Note Tolerance Size 18.5mm×9.5mm 10.5mm×6.4mm 3.2mm×1.6mm 1.6mm×0.8mm 1.6mm×0.8mm 2.0mm×1.2mm 1.6mm×0.8mm 1.6mm×0.8mm 2.0mm×1.2mm φ8mm×11.5mm φ5mm×11mm － － 15μH 5.6Ω 1µF 0.1μF 0.47μF － (±20%) F(±1%) B(±10%） B(±10%） B(±10%） B(±10%） B(±10%） B(±10%） ±20% 1/4W 16V 50V 50V Electrolytic Capacitor www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 26/30 2010.05 - Rev.B BD5446EFV Technical Note ●Output LC Filter Circuit An output filter is required to eliminate radio-frequency components exceeding the audio-frequency region supplied to a load (speaker). Because this IC uses sampling clock frequencies from 200kHz to 400kHz in the output PWM signals, the high-frequency components must be appropriately removed. This section takes an example of an LC type LPF shown in Fig.29, in which coil L and capacitor C compose a differential filter with an attenuation property of -12dB/oct. A large part of switching currents flow to capacitor C, and only a small part of the currents flow to speaker RL. This filter reduces unwanted emission this way. In addition, coil L and capacitor Cg compose a filter against in-phase components, reducing unwanted emission further. Filter constants depend on load impedances. The following are formulas to calculate values of L, C, and Cg when Q=0.707 is specified. L Cg C 45, 46 or 33, 34 L Cg RL L＝ RL 2 H 48, 49 or 38, 39 4π f C 1 2 π f C RL C＝ F 2 Cg ＝ 0 .2 C Fig. 29 F RL : Load impedance (Ω) fC : LPF cut off frequency (Hz) Following presents output LC filter constants with typical load impedances. fC = 30kHz C 0.68µF 0.47µF 0.22µF fC = 40kHz C 0.47µF 0.33µF 0.15µF RL 6Ω 8Ω 16Ω L 22µH 33µH 68µH Cg 0.15µF 0.1µF 0.047µF RL 6Ω 8Ω 16Ω L Cg 0.1µF 0.068µF 0.033µF 15µH 22µH 47µH Use coils with a low direct-current resistance and with a sufficient margin of allowable currents. A high direct-current resistance causes power losses. In addition, select a closed magnetic circuit type product in normal cases to prevent unwanted emission. Use capacitors with a low equivalent series resistance, and good impedance characteristics at high frequency ranges (100kHz or higher). Also, select an item with sufficient withstand voltage because flowing massive amount of high-frequency currents is expected. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 27/30 2010.05 - Rev.B BD5446EFV Technical Note ●Notes for use 1 ) Absolute maximum ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. A physical safety measure such as a fuse should be implemented when use of the IC in a special mode where the absolute maximum ratings may be exceeded is anticipated. 2 ) Power supply lines As return of current regenerated by back EMF of output coil happens, take steps such as putting capacitor between power supply and GND as a electric pathway for the regenerated current. Be sure that there is no problem with each property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. If the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. It is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and GND pins. 3 ) GND potential(Pin 6, 36, 37, 45, 46). Any state must become the lowest voltage about GND terminal and VSS terminal. 4 ) Input terminal The parasitic elements are formed in the IC because of the voltage relation. The parasitic element operating causes the wrong operation and destruction. Therefore, please be careful so as not to operate the parasitic elements by impressing to input terminals lower voltage than GND and VSS. Please do not apply the voltage to the input terminal when the power-supply voltage is not impressed. 5 ) Setting of heat Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. This IC exposes its frame of the backside of package. Note that this part is assumed to use after providing heat dissipation treatment to improve heat dissipation efficiency. Try to occupy as wide as possible with heat dissipation pattern not only on the board surface but also the backside. Class D speaker amplifier is high efficiency and low heat generation by comparison with conventional Analog power amplifier. However, In case it is operated continuously by maximum output power, Power dissipation (Pdiss) may exceed package dissipation. Please consider about heat design that Power dissipation (Pdiss) does not exceed Package dissipation (Pd) in average power (Poav). (Tjmax : Maximum junction temperature=150℃, Ta : Peripheral temperature[℃], θja : Thermal resistance of package[℃/W], Poav : Average power[W], η : Efficiency) Package dissipation : Pd(W)=(Tjmax - Ta)/θja Power dissipation : Pdiss(W)= Poav ×(1/η- 1) 6 ) Actions in strong magnetic field Use caution when using the IC in the presence of a strong magnetic field as doing so may cause the IC to malfunction. 7 ) Thermal shutdown circuit This product is provided with a built-in thermal shutdown circuit. When the thermal shutdown circuit operates, the output transistors are placed under open status. The thermal shutdown circuit is primarily intended to shut down the IC avoiding thermal runaway under abnormal conditions with a chip temperature exceeding Tjmax = 150℃. 8 ) Shorts between pins and misinstallation When mounting the IC on a board, pay adequate attention to orientation and placement discrepancies of the IC. If it is misinstalled and the power is turned on, the IC may be damaged. It also may be damaged if it is shorted by a foreign substance coming between pins of the IC or between a pin and a power supply or a pin and a GND. 9 ) Power supply on/off (Pin 25, 28, 29, 53, 54) In case power supply is started up, RESETX(Pin 12), MUTEX(Pin 13) and PDX (Pin 14) always should be set Low. And in case power supply is shut down, it should be set Low likewise. Then it is possible to eliminate pop noise when power supply is turned on/off. And also, all power supply terminals should start up and shut down together. 10 ) ERROR terminal(Pin 24) A error flag is outputted when Output short protection and DC voltage protection in the speaker are operated. These flags are the function which the condition of this product is shown in. 11 ) N.C. terminal(Pin 26, 30, 34, 35, 41, 47, 48, 52) N.C. terminal (Non Connection Pin) does not connect to the inside circuit. Therefore, possible to use open. 12 ) TEST terminal(Pin 19, 20) TEST terminal connects with ground to prevent the malfunction by external noise. 13 ) Precautions for Spealer-setting If the impedance characteristics of the speakers at high-frequency range while increase rapidly, the IC might not have stable-operation in the resonance frequency range of the LC-filter. Therefore, consider adding damping-circuit, etc., depending on the impedance of the speaker. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 28/30 2010.05 - Rev.B BD5446EFV ●Allowable Power Dissipation 7 PCB③ 6.2W Technical Note 6 5 Power Dissipation Pd （W) PCB② 4.5W 4 3 PCB① 2.0W 2 1 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Ambient Temperature:Ta( ℃) Measuring instrument : TH-156(Shibukawa Kuwano Electrical Instruments Co., Ltd.) Measuring conditions : Installation on ROHM’s board Board size : 70mm×70mm×1.6mm(with thermal via on board) Material : FR4 ・The board on exposed heat sink on the back of package are connected by soldering. PCB① : 1-layer board(back copper foil size: 0mm×0mm), θja＝62.5℃/W PCB② : 2-layer board(back copper foil size: 70mm×70mm),θja＝27.8℃/W PCB③ : 4-layer board(back copper foil size: 70mm×70mm),θja＝20.2℃/W www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 29/30 2010.05 - Rev.B BD5446EFV ●Ordering part number Technical Note B Part No. D 5 Part No. 4 4 6 E F V - E 2 Package EFV : HTSSOP-B54 Packaging and forming specification E2: Embossed tape and reel HTSSOP-B54 18.5±0.1 (MAX 18.85 include BURR) (6.0) 54 28 Tape +6° 4° −4° Embossed carrier tape (with dry pack) 1500pcs E2 The direction is the 1pin of product is at the upper left when you hold Quantity Direction of feed 9.5±0.2 7.5±0.1 0.5±0.15 1 1PIN MARK 27 0.8 S 1.0MAX +0.05 0.17 -0.03 0.85±0.05 0.08±0.05 0.08 S 0.65 +0.05 0.22 -0.04 0.08 M 1.0±0.2 ( reel on the left hand and you pull out the tape on the right hand ) (5.0) 1pin Direction of feed (Unit : mm) Reel ∗ Order quantity needs to be multiple of the minimum quantity. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 30/30 2010.05 - Rev.B Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. R1010A