BD5460GUL is a low voltage drive class-D monaural speaker amplifier that was developed for cellular phones, mobile
audio products and the others.LC-filter of speaker output is unnecessary, and the number of external components is three.
It is suitable for the application of battery drive because of high efficiency and low power consumption.
Also, stand-by current is 0µA (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) No LC filter required
2) Only three external components
3) High power 2.5W/4Ω/BTL (VDD=5V, RL=4Ω, THD+N=10%, typ.)
4) High power 0.85W/8Ω/BTL (VDD=3.6V, RL=8Ω, THD+N=10%, typ.)
5) Gain 6dB
6) Analog differential input / PWM digital output
7) Pop noise suppression circuitry
8) Built-in standby function
9) Protection circuitry (Short protection [Auto recover without power cycling], Thermal shutdown, Under voltage lockout)
10) Very small package 9-Bump WL-CSP (1.6*1.6*0.55mmMAX)
●Applications
Mobile phones, Mobile electronics applications
●Absolute Maximum Ratings(Ta=25℃)
Item Symbol Ratings Unit
Power Supply Voltage
Power Dissipation
Storage Temperature Range
STBY Terminal Input Range
IN+, IN- Terminal Input Range
*1 When mounted on a 50 mm×58mm Rohm standard board, reduce by 5.52 mW/°C above Ta = +25 °C.
●Operating Conditions
Item Symbol Ratings Unit
Power Supply Voltage VDD +2.5 ~ +5.5 V
Temperature Range Topr -40 ~ +85 ℃
※ This product is not designed for protection against radioactive rays
It makes a Input coupling capacitor 0.1µF.
Input impedance is 100kΩ (Typ.).
It sets cut-off frequency fc by the following formula by input coupling capacitor C1 (=C2) and input impedance Ri.
fc
In case of Ri =100kΩ, C1 (=C2) =0.1µF, it becomes fc = about 16 Hz.
② Power decoupling capacitor (C3)
It makes a power decoupling capacitor 10 µF.
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.
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=22µH, C=1µF, the cut-off frequency becomes the following.
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 +180
℃.Since TSD operates persistently with the purpose of preventing chip damage, be aware that long-term use in the
+100
℃, is canceled when this goes below approximately
vicinity that TSD affects decrease IC reliability.
Temperature Derating Curve
Reference data
1.5
measurement conditions : IC unit and Rohm standard board mount
board size : 50mm×58mm
1.0
0.69W
Power Dissipation Pd (W)
0.5
θja = 181.8℃/W
0.0
0 25 50 75 100 125
85
150
Note) Values are actual measurements and are not guaranteed.
Ambient Temperature Ta(
℃)
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.
(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 = +150
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 1MΩ impedance,
(11) Operating ranges
The rated operating power supply voltage range (VDD=+2.5V
(Ta=-40
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.
℃~+85℃) are the range by which basic circuit functions is operated. Characteristics and rated output power are
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The Products specied in this document are intended to be used with general-use electronic
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