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High Performance Class-D Speaker / Headphone Amplifier Series
2.5W Monaural Class-D Speaker Amplifier for Differential Analog Input
BD5632NUX, BD5634NUX, BD5638NUX
No.10075ECT09
Description BD5632NUX, BD5634NUX and BD5638NUX are a low voltage drive class-D speaker amplifier that was developed for mobile phones, mobile audio products and the others. BD5632NUX has a fixed gain of 6dB, BD5634NUX has a fixed gain of 12dB, and BD5638NUX has a fixed gain of 18dB. It is suitable for the application of battery drive because of high efficiency and low power consumption. Also, stand-by current is 0A (typ.), and fast transitions from standby to active with little pop noise. It is suitable for applications that switch repeatedly between stand-by and active. Features 1) LC Filter less 2) Only 3 external components 3) High power 2.5W/4ohm/BTL VDD=5V, RL=4ohm, THD+N=10%, typ. 4) High power 0.85W/8ohm/BTL VDD=3.6V, RL=8ohm, THD+N=10%, typ. 5) Analog differential input / PWM digital output 6) Pop noise suppression circuit 7) Standby function (Mute function) 8) Protection circuit (Short protection [Auto recover without power cycling], Thermal shutdown, Under voltage lockout) 9) Ultra small package VSON008X2030 (2.0x3.0x0.6mmMAX) Applications Mobile phones, PND(Personal Navigation Device), DSC, PDA, etc Lineup Production Name Gain (dB) Input Impedance (k) Package BD5632NUX 6 100 BD5634NUX 12 50 VSON008X2030 BD5638NUX 18 25
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1/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Absolute Maximum Ratings (Ta=25) Parameter Power Supply Voltage Power Dissipation Storage Temperature Range STBY Terminal Input Range IN+, IN- Terminal Input Range Symbol VDD Pd Tstg Vstby Vin Rating 7.0 0.52 *1 -55 +150 -0.3VDD+0.3 -0.3VDD+0.3 Unit V W V V
Technical Note
(*1) ROHM standard board mounted (Board size 70mmx70mmx1.6mmt, 1layer), de-rate the value 4.16mW/deg above Ta=+25deg.
Operating Conditions Item Power Supply Voltage Temperature Range
Symbol VDD Topr
Rating +2.5 +5.5 -40 +85
Unit V
*This product is not designed for protection against radioactive rays.
Electric Characteristics Unless otherwise specified, Ta=+25deg, VDD=+3.6V, f=1kHz, RL=8, AC item=LC Filter ; L=22H, C=1F Rating Item Symbol Unit Conditions MIN. TYP. MAX. Active mode, No load Circuit current (No signal) ICC 2.7 5.4 mA Circuit current (Standby) Output power1 Output power2 Voltage gain (BD5632NUX) Voltage gain (BD5634NUX) Voltage gain (BD5638NUX) Switching Frequency Start-up time STBY threshold voltage Input impedance (STBY)
Input impedance (IN+/-) (BD5632NUX) Input impedance (IN+/-) (BD5634NUX) Input impedance (IN+/-) (BD5638NUX)
ISTBY PO1 PO2 GV fosc Ton VSTBY RSTBY RIN
450 550 5.5 11.5 17.0 150 0.36 0.4 210 70 35 17.5
0.1 680 850 6.0 12.0 18.0 250 0.51 300 100 50 25
2 6.5 12.5 19.0 350 0.85 1.4 390 130 65 32.5
A mW mW dB kHz msec V kohm kohm
Standby mode BTL, f=1kHz, THD+N=1% *1 BTL, f=1kHz, THD+N=10% *1 BTL
Active to standby shift
*1B.W.20kHz-LPF BTL The voltage between 5 pin and 8 pin
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2/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Measurement Circuit Diagram
Technical Note
VSTBY
OUT-
A
1 STBY NC 2
0.47F IN+
Bias
OSC
8 GND
22H
1F 8 10F
V V
VBTL
VSE
7
Vin 0.47F Vin
3 PWM HBridge
6
VDD OUT+
22H
IN-
4
5
1F
V
VSE
A
VDD
Active/Standby Control STBY Pin1pin Mode Active Standby Pin Level H L Conditions IC Active IC Shutdown
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3/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Package Outline TOP VIEW BD5632NUX BD5634NUX
Technical Note
D56 32
D56 34
Lot No.
Lot No.
BD5638NUX
BOTTOM VIEW
D56 38
Lot No.
PKG VSON008X2030 Block Diagram Pin Assignment Chart
(unit : mm)
PIN No.
STBY 1 Bias OSC 8 OUT-
PIN Name STBY NC IN+ INOUT+ VDD GND OUT-
1 2
NC
2
7
GND
3 4
IN+
3 PWM HBridge
6
VDD
5 6
IN-
4
5
OUT+
7 8
NC : Non Connection
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4/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Application Circuit Example
10
Technical Note
VDD 6
HActive LShutdown
STBY 1
Bias
OSC
Audio Input+
IN+ 3 PWM IN4 HBridge
OUT8
Differential Input
Audio Input-
OUT+ 6
GND 7
Fig.1 Differential Input for mobile phone
10
VDD 6
HActive LShutdown
STBY 1
Bias
OSC
Audio Input+
0.47
IN+ 3
OUT8 PWM HBridge
Differential Input
Audio Input-
0.47
IN4
OUT+ 5
GND 7
Fig.2 Differential input with coupling input capacitors
10
VDD 6
HActive LShutdown
STBY 1
Bias
OSC
Audio Input
0.47
IN+ 3 PWM HBridge
OUT8
0.47
IN4
OUT+ 5
GND 7
Fig.3 Single-Ended input
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5/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Evaluation board Circuit Diagram
VDD C3 10
Technical Note
Please connect to Power Supply (VDD=+2.55.5V) line. Please connect to GND line.
U1 S1
HActive LShutdown
VDD 6
STBY 1
300k
Bias
OSC
Audio Input+
0.47 C2
IN+ Ri 3 PWM HBridge
OUT8
Differential Input
Audio Input-
0.47 C1
IN4
Ri
OUT+ 5
GND 7
Please connect to Input Signal line. Please connect to Speaker. Evaluation board Parts List Qty. 2 1 1 1 1 Item C1, C2 C3 S1 U1 PCB1 Description Capacitor, 0.47F Capacitor, 10F Slide Switch IC Mono Class-D audio amplifier Printed-circuit board, BD5632/34/38NUX EVM SMD Size 0603 A (3216) 4mm X 10.2mm 2.0mm X 3.0mm VSON Package Manufacturer/ Part Number Murata GRM188R71A474KA01D ROHM TCFGA1A106M8R NKK SS-12SDP2 ROHM BD5632/34/38NUX
Description of External components 1. Input coupling capacitor (C1,C2) It makes a Input coupling capacitor 0.47F. It sets cutoff frequency fc by the following formula by input coupling capacitor C1 (=C2) and input impedance Ri.
fc
1 [Hz] 2 Ri C 1
In case of C1(=C2)=0.47F BD5632NUX Ri =100k : fc=3.5Hz BD5634NUX Ri =50k : fc=7Hz BD5638NUX Ri =25k : fc=14Hz 2. Power decoupling capacitor (C3) It makes a power decoupling capacitor 10F. When making capacitance of the power decoupling capacitor, there is an influence in the Audio characteristic. When making small, careful for the Audio characteristic at the actual application.
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6/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Evaluation board PCB layer
Technical Note
TOP Layer silk pattern
TOP Layer
Bottom Layer
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7/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
The way of evaluating Audio characteristic Evaluation Circuit Diagram
Technical Note
VDD
C3 0.1 C4 10
VDD
HActive LShutdown
VDD 6
STBY 1
300k
Bias
OSC
Measument Instrument
Audio Input+
0.47 C2
IN+ 3
Ri=100k
OUT8 PWM HBridge
22H 1F RL BTL
Audio Precision etc +
Differential Input
Audio Input-
0.47 C1
IN4
Ri=100k
OUT+ 5
22H
1F
GND 7
RL=Speaker Load
When measuring Audio characteristics, insert LC filter during the output terminal of IC and the speaker load and measure it. Arrange LC filter as close as possible to the output terminal of IC. In case of L=22H, C=1F, the cut-off frequency becomes the following.
fc
1 2 LC
1 2 22 H 1F
34 kHz
Use a big current type - Inductor L. (Reference) TDK SLF12575T-220M4R0
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8/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Technical Note
About the thermal design by the IC Characteristics of an IC have a great deal to do with the temperature at which it is used, and exceeding absolute maximum ratings may degrade and destroy elements. Careful consideration must be given to the heat of the IC from the two standpoints of immediate damage and long-term reliability of operation. Pay attention to points such as the following. Since an maximum junction temperature (TjMAX.)or operating temperature range (Topr) is shown in the absolute maximum ratings of the IC, to reference the value, find it using the Pd-Ta characteristic (temperature derating curve). If an input signal is too great when there is insufficient radiation, TSD (thermal shutdown) may operate. TSD, which operates at a chip temperature of approximately +180deg, is canceled when this goes below approximately +100deg. Since TSD operates persistently with the purpose of preventing chip damage, be aware that long-term use in the vicinity that TSD affects decrease IC reliability.
Temperature Derating Curve
Reference Data
VSON008X2030
2.0
Power Dissipation PdW
measurement conditions: IC unit and Rohm standard board mount board size : 70mmx70mm x 1.6mm 1layer
1.5
1.0
0.52W 0.5
ja =
240.4 deg/W
0.0 0 25 50 75
85
100
125
150
Ambient Temperature Ta (deg)
Note) Values are actual measurements and are not guaranteed.
Power dissipation values vary according to the board on which the IC is mounted. The Power dissipation of this IC when mounted on a multilayer board designed to radiate is greater than the values in the graph above.
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9/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Efficiency - Output power f=1kHz RL=8+33uH LC-filter(22uH+1uF) 100.0 90.0 80.0 70.0 Efficiency [%] 60.0 50.0 40.0 30.0 20.0 10.0 0.0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Po [W] 1 1.1 1.2 VDD=2.5V VDD=3.6V VDD=5.0V 250 Icc [mA] 200 150 100 50 0 0 350 300
Technical Note
Icc vs Output power f=1kHz RL=8+33uH LC-filter(22uH+1uF)
VDD=2.5V VDD=3.6V VDD=5.0V
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Po [W]
1
1.1 1.2
Fig.4
Efficiency vs Output power f=1kHz RL=4+33uH LC-filter(22uH+1uF) 90 80 70 Efficiency [%] 60 Icc [mA] 50 40 30 20 10 0 0 0.2 0.4 0.6 0.8 1 Po [W] 1.2 1.4 1.6 1.8 2 100 0 0 0.2 0.4 0.6 0.8 VDD=2.5V VDD=3.6V VDD=5.0V 500 400 300 200 700 600
Fig.5
Icc vs Output power f=1kHz RL=4+33uH LC-filter(22uH+1uF)
VDD=2.5V VDD=3.6V VDD=5.0V
1 1.2 Po [W]
1.4
1.6
1.8
2
Fig.6
Icc - VDD No load, No signal 4 3.5 3 Icc [mA] 2.5 2 1.5 1 0.5 0 0 1 2 3 VDD [V] 4 5 6 0 0 1 2 Istby [uA] 0.4 0.3 0.2 0.1 0.5
Fig.7
Istby - VDD
3 VDD [V]
4
5
6
Fig.8
Output power vs RL THD+N=10% f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz 2.8 2.4 2.0 Po [W] 1.6 1.2 0.8 0.4 0.0 4 8 12 16 20 24 28 32 RL [] VDD=2.5V VDD=3.6V VDD=5.0V 2.0 1.8 1.6 1.4 Po [W] 1.2 1.0 0.8 0.6 0.4 0.2 0.0 4 8 12
Fig.9
Output power vs RL THD+N=1% f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
VDD=2.5V VDD=3.6V VDD=5.0V
16
20
24
28
32
RL []
Fig.10
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Fig.11
10/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Output power vs VDD f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz 3.0 2.5 2.0 Po [W] 1.5 1.0 0.5 0.0 2.5 3 3.5 VDD [V] 4 4.5 5 0.1 0.01 RL=8THD+N=1% RL=8THD+N=10% THD+N [%] RL=4THD+N=1% RL=4THD+N=10% 10 VDD=2.5V VDD=3.6V VDD=5.0V 1
Technical Note
THD+N vs Output power RL=4 f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
0.1
Po [W]
1
10
Fig.12
THD+N vs Output power RL=8 f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz 10 10
Fig.13
THD+N vs Frequency VDD=5.0V RL=8 LC-filter(22uH+1uF) 30kHz-LPF
THD+N [%]
1
0.1 0.01
THD+N [%]
VDD=2.5V VDD=3.6V VDD=5.0V
1
Po=50mW Po=250mW Po=1W
0.1
0.01 0.1 Po [W] 1 10 10 100 1k freq [Hz] 10k 100k
Fig.14
THD+N vs Frequency VDD=3.6V RL=8 LC-filter(22uH+1uF) 30kHz-LPF 10 Po=25mW Po=125mW Po=500mW
Fig.15
THD+N vs Frequency VDD=2.5V RL=8 LC-filter(22uH+1uF) 30kHz-LPF
10
1 THD+N [%]
1 THD+N [%]
Po=15mW Po=75mW Po=200mW
0.1
0.1
0.01 10 100 1k freq [Hz] 10k 100k
0.01 10 100 1k freq [Hz] 10k 100k
Fig.16
THD+N vs Frequency RL=4 Po=250mW LC-filter(22uH+1uF) 30kHz-LPF 10 VDD=2.5V VDD=3.6V VDD=5.0V THD+N [%] 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0.01 10 100 1k freq [Hz] 10k 100k 0 0
VDD=2.5V VDD-3.6V VDD=5.0V
Fig.17
THD+N_vs_Common Mode Input Voltage f=1kHz RL=8 Po=200mW LC-filter(22uH+1uF) 400Hz-30kHz
1 THD+N [%]
0.1
Fig.18
2 4 6 Vic - Common Mode Input Voltage [V]
8
Fig.19
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11/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
0 -10 -20 PSRR [dB] -30 -40 -50 -60 10 100 1k f [Hz] 10k 100k VDD=2.5V VDD=5.0V PSRR [dB] VDD=3.6V PSRR RL=4 Vripple=0.1Vpp Inputs ac-Grounded LC-filter(22uH+1uF) 30kHz-LPF 0 -10 -20 -30 -40 -50 -60 10 100 1k f [Hz] VDD=2.5V VDD=3.6V VDD=5.0V
Technical Note
PSRR RL=8 Vripple=0.1Vpp Inputs ac-Grounded LC-filter(22uH+1uF) 30kHz-LPF
10k
100k
Fig.20
CMRR RL=8 Vin=1Vpp LC-filter(22uH+1uF) 30kHz-LPF -30 -35 CMRR [dB] -40 -45 -50 -55 10 100 1k freq [Hz] 10k 100k 0.01 10 100 THD+N [%] VDD=2.5V VDD=3.6V VDD=5.0V 1
Fig.21
THD+N vs Frequency VDD=5.0V RL=4 LC-filter(22uH+1uF) 30kHz-LPF Po=50mW Po=250mW Po=1W
10
0.1
1k freq [Hz]
10k
100k
Fig.22
THD+N vs Frequency VDD=3.6V RL=4 LC-filter(22uH+1uF) 30kHz-LPF 10 Po=25mW Po=125mW Po=500mW THD+N [%] 10
Fig.23
THD+N vs Frequency VDD=2.5V RL=4 LC-filter(22uH+1uF) 30kHz-LPF
Po=15mW Po=75mW 1 Po=200mW
1 THD+N [%]
0.1
0.1
0.01 10 100 1k freq [Hz] 10k 100k
0.01 10 100 1k freq [Hz] 10k 100k
Fig.24
Gain_vs_Frequency RL=4 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF 20 15
Fig.25
Gain vs Frequency RL=8 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
20 15 gain [dB] 10 5 0 -5
10 100 1k freq [Hz] 10k 100k VDD=2.5V VDD=3.6V VDD=5.0V
gain [dB]
10 5 0 -5
VDD=2.5V VDD=3.6V VDD=5.0V
10
100
Fig.26
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1k freq [Hz] Fig.27
10k
100k
(c) 2010 ROHM Co., Ltd. All rights reserved.
12/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Technical Note
Notes for use (1) Numbers and data in entries are representative design values and are not guaranteed values of the items. (2) Although we are confident recommending the sample application circuit, carefully check their characteristics further when using them. When modifying externally attached component constants before use, determine them so that They have sufficient margins by taking into account variations in externally attached components and the Rohm IC, not only for static characteristics but also including transient characteristics. (3) Absolute maximum ratings This IC may be damaged if the absolute maximum ratings for the applied voltage, temperature range, or other parameters are exceeded. Therefore, avoid using a voltage or temperature that exceeds the absolute maximum ratings. If it is possible that absolute maximum ratings will be exceeded, use fuses or other physical safety measures and determine ways to avoid exceeding the IC's absolute maximum ratings. (4) GND terminal's potential Try to set the minimum voltage for GND terminal's potential, regardless of the operation mode. (5) Shorting between pins and mounting errors When mounting the IC chip on a board, be very careful to set the chip's orientation and position precisely. When the power is turned on, the IC may be damaged if it is not mounted correctly. The IC may also be damaged if a short occurs (due to a foreign object, etc.) between two pins, between a pin and the power supply, or between a pin and the GND. (6) Operation in strong magnetic fields Note with caution that operation faults may occur when this IC operates in a strong magnetic field. (7) Thermal design Ensure sufficient margins to the thermal design by taking in to account the allowable power dissipation during actual use modes, because this IC is power amp. When excessive signal inputs which the heat dissipation is insufficient condition, it is possible that thermal shutdown circuit is active. (8) 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 = +150deg, and is not intended to protect and secure an electrical appliance. (9) Load of the output terminal This IC corresponds to dynamic speaker load, and doesn't correspond to the load except for dynamic speakers. (10) The short protection of the output terminal The short-circuiting protection of this IC corresponds only to "VDD-short" (the short-circuiting with the power) of the output terminal and "GND-short" (the short-circuiting with GND) of the output terminal. It doesn't correspond to the short-circuiting among the output terminals. Also, when the short-circuiting condition of the output terminal is canceled, it detects the high impedance of the output terminal and it is equipped with the auto recover without power cycling(the cancellation) function in the short-circuiting protection. Be careful of the output terminal, because, there is a fear not to return automatically when the short-circuiting condition occurs in pull-up or the pull-down at equal to or less than about 1M impedance. (11) Operating ranges The rated operating power supply voltage range (VDD=+2.5V+5.5V) and the rated operating temperature range (Ta=-40deg+85deg) are the range by which basic circuit functions is operated. Characteristics and rated output power are not guaranteed in all power supply voltage ranges or temperature ranges. (12) Electrical characteristics Electrical characteristics show the typical performance of device and depend on board layout, parts, power supply. The standard value is in mounting device and parts on surface of ROHM's board directly. (13) Power decoupling capacitor Because the big peak current flows through the power line, the class-D amplifier has an influence on the Audio characteristic by the capacitance value or the arrangement part of the power decoupling capacitor. Arrange a power decoupling capacitor as close as possible to the VDD terminal of IC. (14) NC terminal (Pin2) NC terminal (Non Connection Pin) does not connect to the inside circuit. Therefore, please open or connect to GND.
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13/14
2010.02 - Rev.C
BD5632NUX, BD5634NUX, BD5638NUX
Ordering part number
Technical Note
B
D
5
Part No. 5632 5634 5638
6
3
2
N
U
X
T
R
Part No.
Package NUXVSON008X2030
Packaging and forming specification TR: Embossed tape and reel
VSON008X2030
2.00.1
3.00.1

Tape Quantity
S
+0.03 0.02 -0.02 (0.12)
Embossed carrier tape 4000pcs TR
The direction is the 1pin of product is at the upper right when you hold
1PIN MARK
0.6MAX
Direction of feed
( reel on the left hand and you pull out the tape on the right hand
)
0.08 S
1.50.1 0.5
C0.25
0.30.1
8
5
0.25
1.40.1
1
4
+0.05 0.25 -0.04
1pin
Direction of feed
(Unit : mm)
Reel
Order quantity needs to be multiple of the minimum quantity.
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14/14
2010.02 - Rev.C
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.
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