High Performance Class-D Speaker Amplifier Series 10W+10W Class-D Speaker Amplifier for Analog Input No.09075EAT05 BD5426EFS ●Overview BD5426EFS is a 10W + 10W stereo class-D power amplifier IC, developed for space-saving and low heat-generation applications such as low-profile TV sets. The 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 has achieved high efficiency of 87% (9W + 9W output with 8Ω load). The IC, in addition, employs a compact back-surface heat radiation type power package to achieve low power consumption and low heat generation and eliminates necessity of installing an external radiator, up to a total output of 20W. This product satisfies both needs for drastic downsizing, low-profile structures and powerful, high-quality playback of the sound system. ●Features 1) A high efficiency of 87% (9W + 9W output with 8Ω load), which is the highest grade in the industry and low heat-generation. 2) An output of 10W + 10W (13V, with 8Ω load) is allowed without an external heat radiator. 3) Driving a lowest rating load of 6Ω is allowed. 4) Pop noise upon turning power on/off and power interruption has been reduced. 5) High-quality audio muting is implemented by soft-switching technology. 6) An output power limiter function limits excessive output to speakers. 7) High-reliability design provided with built-in protection circuits against high temperatures, against VCC shorting and GND shorting, against reduced-voltage, and against applying DC voltage to speaker. 8) A master/slave function allowing synchronization of multiple devices reduces beat noises. 9) Adjustment of internal PWM sampling clock frequencies (250kHz to 400kHz) allows easy protective measures against unwanted radio emission to AM radio band. 10) A compact back-surface heat radiation type power package is employed. HTSSOP-A44(5mm × 7.5mm × 1.0mm, pitch 0.8mm ) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 1/16 2009.06 - Rev.A Technical Note BD5426EFS ●Absolute Maximum Ratings A circuit must be designed and evaluated not to exceed absolute maximum rating in any cases and even momentarily, to prevent reduction in functional performances and thermal destruction of a semiconductor product and secure useful life and reliability. The following values assume Ta =25℃. For latest values, refer to delivery specifications. Symbol Rating Unit Item Supply voltage VCC Conditions +20 V Pin 7, 8, 15, 16, 29, 30, 37, 38, 40 (Note 1, 2) 2.0 W (Note 3) Power dissipation Pd 4.5 W (Note 4) Input voltage for signal pin VIN -0.2 ～ +7.2 V Pin 1, 44 (Note 1) Input voltage for control pin VCONT -0.2 ～ Vcc+0.2 V Pin 20, 24 (Note 1) Input voltage for clock pin VOSC -0.2 ～ +7.2 V Pin 23 (Note 1) Topr -40 ～ +85 ℃ Storage temperature range Tstg -55 ～ +150 ℃ Maximum junction temperature Tjmax +150 ℃ Operating temperature range (Note 1) A voltage that can be applied with reference to GND (pins 11, 12, 33, 34, and 43) (Note 2) Pd and Tjmax=150℃ must not be exceeded. (Note 3) 70mm × 70mm × 1.6mmFR4 One-sided glass epoxy board (Back copper foil 0%) installed. If used under Ta=25℃ or higher, reduce 16mW for increase of every 1℃. The board is provided with thermal via. (Note 4) 70mm × 70mm × 1.6mmFR4 Both-sided glass epoxy board (Back copper foil 100%) installed. If used under Ta=25℃ or higher, reduce 36mW for increase of every 1℃. The board is provided with thermal via. ●Operating Conditions The following values assume Ta =25℃. Check for latest values in delivery specifications. Symbol Rating Unit Item Conditions Supply voltage VCC +10～+16.5 V Pin 7, 8, 15, 16, 29, 30, 37, 38, 40 Load resistance RL 6 ～ 16 Ω (Note 5) (Note 5) Pd should not be exceeded. ●Electrical Characteristics Except otherwise specified Ta = 25℃, VCC = 12V, fIN = 1kHz, Rg = 0Ω, RL = 8Ω,MUTEX="H", MS="L" For latest values, refer to delivery specifications. Representative Symbol Unit Conditions Item value Whole circuit Circuit current 1 (Sampling mode) ICC1 25 mA With no signal Circuit current 2 (Muting mode) ICC2 10 mA MUTEX = “L” “H” level input voltage VIH 2.3～12 V SDX, MUTEX, MS “L” level input voltage VIL 0～0.8 V SDX, MUTEX, MS Voltage gain GV 28 dB PO = 1W Maximum output power 1 (Note 6) PO1 9 W THD+N = 10% Maximum output power 2 (Note 6) PO2 10 W Vcc = 13V, THD+N = 10% Total harmonic distortion (Note 6) Control circuit Audio circuit THD 0.1 % PO = 1W, BW=20Hz～20kHz Crosstalk CT 85 dB PO = 1W, Rg = 0Ω, BW = IHF-A Output noise voltage (Sampling mode) VNO 80 µVrms Rg = 0Ω, BW = IHF-A Residual noise voltage (Muting mode) VNOM 1 µVrms Rg = 0Ω, BW = IHF-A, MUTEX = “L” Internal sampling clock frequency FOSC 250 kHz MS = “L” (In master operation) (Note 6) The rated values of items above indicate average performances of the device, which largely depend on circuit layouts, components, and power supplies. The reference values are those applicable to the device and components directly installed on a board specified by us. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 2/16 2009.06 - Rev.A Technical Note BD5426EFS ●Electrical characteristic curves (Reference data) (1)Under Stereo Operation（RL=8Ω） 100 6kHz 1 0.1 0.01 0.001 Vcc=12V RL=8Ω Po=1W BW=20～20kHz 10 THD+N (%) THD+N (%) 10 100 Vcc=12V RL=8Ω BW=20～20kHz 1kHz 1 0.1 100Hz 0.01 0.01 0.1 1 OUTPUT POWER (W) 10 10 100 100 Fig. 1 THD+N － Output power 1000 10000 FREQUENCY (Hz) Fig. 2 THD+N － Frequency 35 0 Vcc=12V RL=8Ω Po=1W BW=20～20kHz 30 -20 25 CROSSTALK (dB) VOLTAGE GAIN (dB) 100000 Vcc=12V RL=8Ω Po=1W L=33µH C=0.47µF Cｇ=0.1µF 20 15 10 -40 -60 -80 5 -100 0 10 100 1000 10000 FREQUENCY (Hz) 10 100000 100 Fig. 3 Voltage gain - Frequency 100000 20 Vcc=12V RL=8Ω fin=1kHz BW=20～20kHz -20 -40 OUTPUT POWER (W) CROSSTALK (dB) 10000 Fig. 4 Crosstalk - Frequency 0 -60 -80 -100 0.001 1000 FREQUENCY (Hz) RL=8Ω fin=1kHz THD=10% 15 10 5 0 0.01 0.1 1 10 8 100 OUTPUT POWER (W) Fig. 5 Crosstalk - Output power www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. Fig. 6 3/16 10 12 14 VCC (V) 16 18 Output power - Power supply voltage 2009.06 - Rev.A Technical Note BD5426EFS 100 90 80 70 60 50 40 30 20 10 0 EFFICIENCY (%) EFFICIENCY (%) ●Electrical characteristic curves (Reference data) – Continued Vcc=10V RL=8Ω fin=1kHz 0 5 10 15 100 90 80 70 60 50 40 30 20 10 0 Vcc=12V RL=8Ω fin=1kHz 20 0 5 10 15 OUTPUT POWER (W/ch) OUTPUT POWER (W/ch) Fig. 8 Efficiency - Output power 3 100 90 80 70 60 50 40 30 20 10 0 Vcc=16.5V Vcc=12V 2 Vcc=10V ICC (A) EFFICIENCY (%) Fig. 7 Efficiency - Output power 1 Vcc=16.5V RL=8Ω fin=1kHz RL=8Ω fin=1kHz 0 0 5 10 15 20 0 OUTPUT POWER (W/ch) 10 15 20 25 30 35 40 Fig. 10 Current consumption - Output power 0 RL=8Ω 無信号時 Without signal Vcc=12V RL=8Ω Without signal 無信号時 BW=20～20kHz -20 NOISE FFT (dBV) ICC (mA) 5 TOTAL OUTPUT POWER (W) Fig. 9 Efficiency - Output power 100 90 80 70 60 50 40 30 20 10 0 20 Sampling -40 -60 -80 -100 -120 Mute -140 8 10 12 VCC 14 (V) 16 10 18 www.rohm.com 1000 10000 100000 FREQUENCY (Hz) Fig. 11 Current consumption - Power supply voltage © 2009 ROHM Co., Ltd. All rights reserved. 100 4/16 Fig. 12 FFT of Output Noise Voltage 2009.06 - Rev.A Technical Note BD5426EFS ●Electrical characteristic curves (Reference data) – Continued MUTEX Pin 20 10V/div TM Pin 26 5V/div Vcc=12V MUTEX Pin 20 RL =8 Ω Po=500m W fin=500Hz TM Pin 26 2V/div Speaker Output 10V/div 5V/div Vcc=12V RL =8 Ω Po=500mW fin=500Hz 2V/div Speaker Output 10msec/div 10msec/div Fig. 13 Wave form when Releasing Soft-mute Fig. 14 Wave form when Activating Soft-mute VCCA VCCA VHOLD Pin 27 5V/div TM Pin 26 5V/div Speaker Output 2V/div VHOLD Vcc=12V Pin 27 RL =8 Ω Po=500m W TM fin=3kHz Pin 26 5V/div Vcc=12V RL =8 Ω Po=500m W fin=3kHz 5V/div 2V/div Speaker Output 20msec/div 2msec/div Fig. 15 Wave form on Instantaneous Power Interruption (20msec / div) 5V/div Soft Clip Speaker Output Fig. 16 Wave form on Instantaneous Power Interruption (2msec / div) Vcc=12V RL =8 Ω Po=5W THD+n=10% fin=1kHz R2=91k Ω R3=22k Ω Soft Clip 200μsec/div Fig. 17 Wave form on Output Power Limiter function (Po = 5W) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 5/16 2009.06 - Rev.A Technical Note BD5426EFS ●Electrical characteristic curves (Reference data) – Continued (2)Under Stereo Operation（RL=6Ω） OUTPUT POWER (W) 25 RL=6Ω fin=1kHz 20 THD=10% 15 10 5 0 8 10 12 14 VCC (V) 16 18 100 90 80 70 60 50 40 30 20 10 0 EFFICIENCY (%) EFFICIENCY (%) Fig. 18 Output power - Power supply voltage Vcc=10V RL=6Ω fin=1kHz 0 5 10 15 20 25 100 90 80 70 60 50 40 30 20 10 0 Vcc=12V RL=6Ω fin=1kHz 0 OUTPUT POWER (W/ch) 5 10 15 20 25 OUTPUT POWER (W/ch) Fig. 20 Efficiency - Output power 4 100 90 80 70 60 50 40 30 20 10 0 Vcc=16.5V 3 Vcc=12V ICC (A) EFFICIENCY (%) Fig. 19 Efficiency - Output power Vcc=16.5V RL=6Ω fin=1kHz Vcc=10V 2 1 RL=6Ω fin=1kHz 0 0 5 10 15 20 0 25 5 10 15 20 25 30 35 40 45 50 TOTAL OUTPUT POWER (W) OUTPUT POWER (W/ch) Fig. 21 Efficiency - Output power Fig. 22 Current consumption - Output power Dotted lines of the graphs indicate continuous output power to be obtained on musical signal source or by installing additional heat sinks. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 6/16 2009.06 - Rev.A © 2009 ROHM Co., Ltd. All rights reserved. www.rohm.com 7/16 6 7 8 9 10 11 12 13 BSP1P V CCP1P V CCP1P OU T1P OU T1P GNDP1 GNDP1 OU T1N 19 20 ERROR M UTEX M ute Control ERROR N.C. 22 N.C. N.C. 21 N.C. 18 W ARNING Output DC V ol tage Protection Output Short Protection High Temperature Protection Under V ol tage Protection Protections & Logi c DRI VER 1N 17 DRI VER 1P BSP1N PW M 2 DRI VER 2N 16 PW M 1 DRI VER 2P V CCP1N W ARN ING 5 PLM T4 15 4 PLM T3 V CCP1N 3 PLM T2 14 L imi t 2 PLM T1 OU T1N Power 1 IN1 Clock Control Ramp Generator Sof t M ute Power-off Detector 23 OSC 24 M S 25 ROSC 26 TM 27 VHOLD 28 BSP2N 29 V CCP2N 30 V CCP2N 31 OU T2N 32 OU T2N 33 GNDP2 34 GNDP2 35 OU T2P 36 OU T2P 37 V CCP2P 38 V CCP2P 39 BSP2P 40 V CCA 41 FIL P FILP V CCA 42 FIL A 43 GNDA FILA GNDA 44 IN2 BD5426EFS Technical Note ●Pin Assignment Top View Fig. 23 Pin Assignment Diagram ●Outer Dimensions and Inscriptions Type BD5426EFS Lot No. Fig. 24 Outer Dimensions and Inscriptions of HTSSOP-A44 Package 2009.06 - Rev.A Technical Note BD5426EFS ●Explanation of Pin Functions (Provided pin voltages are typical values.) No. Symbol Pin voltage Pin description Internal equalizing circuit 40 1 44 IN1 IN2 3.5V ch1 Analog signal input pin ch2 Analog signal input pin 1/44 20k Input audio signal via a capacitor. 43 40 2 PLMT1 3.5V Voltage-to-current conversion pin for output power limiter function 2 Connect a register. 43 40 3 PLMT2 - Current-to-voltage conversion pin for output power limiter function 3 Connect a register. 43 40 4 PLMT3 - Current-to-voltage conversion pin for output power limiter function 4 Connect a register. 43 40 Bias pin for output power limiter function 5 PLMT4 3.5V Connect a register and a capacitor. 5 43 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 8/16 2009.06 - Rev.A Technical Note BD5426EFS ●Explanation of Pin Functions - Continued No. Symbol Pin voltage 6 BSP1P - Pin description ch1 positive bootstrap pin Connect a capacitor. Internal equalizing circuit 7 ,8 6 7, 8 VCCP1P Vcc ch1 positive power system power supply pin 9 10 9, 10 OUT1P Vcc～0V ch1 positive PWM signal output pin Connect with output LPF. 11 12 11, 12 GNDP1 0V ch1 power system GND pin 1 5 ,1 6 13, 14 OUT1N Vcc～0V ch1 negative PWM signal output pin Connect with output LPF. 17 1 3 ,1 4 15, 16 VCCP1N Vcc 17 BSP1N - ch1 negative power system power supply pin ch1 negative bootstrap pin Connect a capacitor. 1 1 ,1 2 40 Warning output pin 18 WARNING H: 5V L: 0V Pin to notify operation warning. H: Under warning L: Normal operation 2k 18 Connect a resister. 43 40 Error output pin 19 ERROR H: 5V L: 0V A pin for notifying operation errors. H: Error L: Normal operation 19 2k Connect a resister. 43 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 9/16 2009.06 - Rev.A Technical Note BD5426EFS ●Explanation of Pin Functions - Continued No. Symbol Pin voltage Pin description Internal equalizing circuit 40 Audio mute control pin MUTEX - 120k H: Mute off L: Mute on 20 80k 20 43 21, 22 N.C. - N.C. pin Nothing is connected with IC internal circuit. 40 Sampling clock signal input/output pin 23 OSC - When using two or more sampling clocks, connect via a capacitor. 23 43 40 Master/Slave switching pin MS - Switching of master/slave functions on a sampling clock signal. H: Slave operation L: Master operation 120k 24 80k 24 43 40 Internal PWM sampling clock frequency setting pin ROSC 5.6V Usually the pin is used open. To adjust an internal sampling clock frequency, connect a resister. 25 32k 25 43 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 10/16 2009.06 - Rev.A Technical Note BD5426EFS ●Explanation of Pin Functions - Continued No. Symbol Pin voltage Pin description Internal equalizing circuit 40 Audio muting constant setting pin 26 TM 0～5V 26 Connect a capacitor. 43 40 VHOLD 0.68×Vcc Connect a capacitor. To adjust a detecting voltage, connect a resister. 27 390k 27 180k Instantaneous power interruption detecting voltage setting pin 43 28 BSP2N - ch2 negative bootstrap pin Connect a capacitor. 29,3 0 28 29, 30 VCCP2N Vcc ch2 negative power system power supply pin 31,3 2 31, 32 OUT2N Vcc～0V ch2 negative PWM signal output pin Connect an output LPF. 33,3 4 33, 34 GNDP2 0V ch2 power system GND pin 37,3 8 35, 36 OUT2P Vcc～0V ch2 positive PWM signal output pin Connect an output LPF. 39 35,3 6 37, 38 VCCP2P Vcc 39 BSP2P - www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. ch2 positive power system power supply pin ch2 positive bootstrap pin Connect a capacitor. 11/16 33,3 4 2009.06 - Rev.A Technical Note BD5426EFS ●Explanation of Pin Functions - Continued No. Symbol Pin voltage 40 VCCA Vcc Pin description Internal equalizing circuit Analog system power pin 40 41 FILP Vcc+35 12 PWM system bias pin Connect a capacitor. 41 43 40 Analog signal system bias pin 42 FILA 3.5V 42 Connect a capacitor. 43 43 GNDA 0V www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. Analog system power supply pin 12/16 2009.06 - Rev.A © 2009 ROHM Co., Ltd. All rights reserved. www.rohm.com GNDA C8 10μF C9 0.15μF 13/16 C7 0.1μF C13 0.15μF C10 0.68μF C15 0.1μF R4 M ute Control Output DC Vol tage Protection Output Short Protection H igh Temperature Protection Under V ol tage Protection Clock Control Ramp Generator Soft M ute 23 24 C26 0.1μF C27 3.3μF C23 0.1μF 25 OPEN 26 27 GNDP CLK I /O GNDD N.C. 22 N.C. N.C. 21 N.C. 20 ERROR C42 10μF 19 18 28 Power-off Detector 17 C28 0.68μF R19 100kΩ DRI VER 1N R18 100kΩ DRI V ER 1P Protections & Logi c DRI VER 2N 29 C29 0.1μF 16 W A RNING DRI V ER 2P 30 C37 0.1μF 15 L31 22μH C38 31 L35 22μH V CCP IN PU T ch-2 M A STER SLA VE 0.15μF 14 32 33 34 35 36 37 10μF 13 12 11 10 9 8 38 C44 2.2μF 0.15μF M U TE C6 0.68μF C31 ERROR OUTPUT C5 0.1μF 39 40 41 FI L P V CCA C39 0.68μF C35 W ARNING OUTPUT R3 22k Ω 7 PW M 2 C41 1μF 6 PW M 1 42 43 FI LA GNDA C40 0.1μF L13 22μH L imi t 4 5 Power 3 2 44 V CCA GNDP R2 22k Ω 1 C43 10μF 6Ω SP ch1 GNDA V CCP C1 2.2µF GNDA L9 22μH IN PU T ch-1 SP ch2 6Ω BD5426EFS Technical Note ●Application Circuit Diagram (under stereo operation) ・Vcc=10V～16.5V C32 0.68μF 22k Ω C17 0.68μF Fig. 25 Circuit Diagram of Stereo Operation with 6Ω Load 2009.06 - Rev.A Technical Note BD5426EFS Table 1 BOM List of Stereo Operation with 6Ω Load Configuration No. Item Part Number Vendor mm 1 ROHM Rated Value inch HTSSOP-A44 Temperature Tolerance voltage - - Quantity Reference characteristics IC BD5426EFS - - 1 IC1 2 C GRM219B31E684KA88D MURATA 2012 0805 0.68µF 25V ±10% ±10% 4 C6, C17, C28, C39 3 C GRM188R11H104KA93 MURATA 1608 0603 0.1µF 50V ±10% ±10% 5 C7, C15, C29, C37, C40 4 C GRM31MB11H154KA01B MURATA 3216 1206 0.15µF 50V ±10% ±10% 4 C9, C13, C31, C35 5 C 25ST225M3216 Rubycon 3225 1210 2.2µF 25V ±20% ±5% 2 C1, C44 6 C 50ST684M3225 Rubycon 3225 1210 0.68µF 50V ±20% ±5% 2 C10, C32 7 C GRM21BB31E335KA75 MURATA 2012 0805 3.3µF 25V ±10% ±10% 1 C27 8 C GRM188B11E104KA MURATA 1608 0603 0.1µF 25V ±10% ±10% 3 C5, C23, C26 9 C GRM21BB11C105KA MURATA 2012 0805 1µF 16V ±10% ±10% 1 C41 10 C GRM21BB31C106KE15 MURATA 2012 0805 10µF 16V ±10% ±10% 1 C42 11 C 25SVPD10M SANYO 6666 2626 10µF 25V ±20% ±25% 3 C8, C38, C43 12 R MCR01MZPF2202 ROHM 1005 0402 22kΩ 50V ±1% ±200ppm/℃ 3 R2, R3, R4 13 R MCR01MZPF1003 ROHM 1005 0402 100kΩ 50V ±1% ±200ppm/℃ 2 R18, R19 No. Item Part Number Vendor Value Tolerance Configuration mm 14 L 7G09B-220M SAGAMI www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 10×9×10 22µH×2 14/16 ±20% DC Rated Resistance DC Current 44mΩmax. 4.1A max. Quantity 2 Reference L9, L13, L31, L35 2009.06 - Rev.A Technical Note BD5426EFS ●Notes on Usage 1. About absolute maximum ratings If an applied voltage or an operating temperature exceeds an absolute maximum rating, it may cause destruction of a device. A result of destruction, whether it is short mode or open mode, is not predictable. Therefore, provide a physical safety measure such as fuse, against a special mode that may violate conditions of absolute maximum ratings. 2. About power supply line 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. Potential of GND (11, 12, 33, 34, and 43 pins) Potential of the GND terminal must be the lowest under any operating conditions. 4. About thermal design Perform thermal design with sufficient margins, in consideration of maximum power dissipation Pd under actual operating conditions. This product has an exposed frame on the back of the package, and it is assumed that the frame is used with measures to improve efficiency of heat dissipation. In addition to front surface of board, provide a heat dissipation pattern as widely as possible on the back also. A class-D power amplifier has heat dissipation efficiency far higher than that of conventional analog power amplifier and generates less heat. However, extra attention must be paid in thermal design so that a power dissipation Pdiss should not exceed the maximum power dissipation Pd. Tjmax - Ta Tjmax: Maximum temperature junction = 150[℃] W Pd Maximum power dissipation Ta: Operating ambient temperature [℃] θ ja θja: Package thermal resistance [℃/W] 1 Po: Output power [W] P diss P O 1 W Power dissipation η η: Efficiency 5. About operations in strong electric field Note that the device may malfunction in a strong electric field. 6. Thermal shutdown (TSD) 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℃, and is not intended to protect and secure an electrical appliance. Accordingly, do not use this circuit function to protect a customer's electrical appliance. 7. About shorting between pins and installation failure Be careful about direction and displacement of an LSI when installing it onto the board. Faulty installation may destroy the LSI when the device is energized. In addition, a foreign matter getting inbetween LSI pins, pins and power supply, and pins and GND may cause shorting and destruction of the LSI. 8. About power supply startup and shutdown When starting up a power supply, be sure to place the MUTEX pin (pin 20) at “L” level. When shutting down a power supply also, be sure to place the pin at “L” level. Those processes reduce pop noises generated upon turning on and off the power supply. In addition, all power supply pins must be started up and shut down at the same time. 9. About WARNING output pin (pin 18) and ERROR output pin (pin 19) A WARNING flag is output from the WARNING output pin upon operation of the high-temperature protection function and under-voltage protection function. And an ERROR flag is output from the ERROR output pin upon operation of VCC/GND shorting protection function and speaker DC voltage applying protection function. These flags are the function which the condition of this product is shown in. The use which aimed at the protection except for this product is prohibition. 10. About N.C. pins (pins 21 and 22) The N.C. (Non connection) pins are not connected with an internal circuit. Leave the pins open or connect them to GND. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 15/16 2009.06 - Rev.A Technical Note BD5426EFS ●Ordering part number B D 5 Part No BD 4 2 6 E Part No. 5426 F S Package EFS: HTSSOP-A44 - E 2 Packaging and forming specification E2: Embossed tape and reel HTSSOP-A44 <Tape and Reel information> 18.5±0.1 (MAX 18.85 include BURR) (6.0) 0.5±0.15 (5.0) 1 0.85 1.0±0.2 23 7.5±0.1 9.5±0.2 44 +6° 4° −4° Tape Embossed carrier tape (with dry pack) Quantity 1500pcs Direction of feed E2 The direction is the 1pin of product is at the upper left when you hold ( reel on the left hand and you pull out the tape on the right hand ) 22 1PIN MARK +0.05 0.17 -0.03 1.0MAX S 0.08±0.05 0.85±0.05 0.08 S 0.8 +0.05 0.37 -0.04 0.08 M 1pin (Unit : mm) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. Reel 16/16 Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. 2009.06 - Rev.A 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. 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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 © 2009 ROHM Co., Ltd. All rights reserved. R0039A