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PDF MAX9788 Data sheet ( Hoja de datos )
| Número de pieza | MAX9788 | |
| Descripción | Class G Ceramic Speaker Driver | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX9788 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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19-0710; Rev 3; 5/08
EVAALVUAAILTAIOBNLEKIT
14VP-P, Class G Ceramic Speaker Driver
General Description
The MAX9788 features a mono Class G power amplifier
with an integrated inverting charge-pump power supply
specifically designed to drive the high capacitance of a
ceramic loudspeaker. The charge pump can supply
greater than 700mA of peak output current at 5.5VDC,
guaranteeing an output of 14VP-P.
The MAX9788 maximizes battery life by offering high-
performance efficiency. Maxim’s proprietary Class G
output stage provides efficiency levels greater than
Class AB devices without the EMI penalties commonly
associated with Class D amplifiers.
The MAX9788 is ideally suited to deliver the high out-
put-voltage swing required to drive ceramic/piezoelec-
tric speakers.
The device utilizes fully differential inputs and outputs,
comprehensive click-and-pop suppression, shutdown
control, and soft-start circuitry. The MAX9788 is fully spec-
ified over the -40°C to +85°C extended temperature range
and is available in small lead-free 28-pin TQFN (4mm x
4mm) or 20-bump WLP (2mm x 2.5mm) packages.
Cell Phones
Smartphones
MP3 Players
Applications
Personal Media Players
Handheld Gaming
Consoles
Notebook Computers
Features
♦ Integrated Charge-Pump Power Supply—No
Inductor Required
♦ 14VP-P Voltage Swing into Piezoelectric Speaker
♦ 2.7V to 5.5V Single-Supply Operation
♦ Clickless/Popless Operation
♦ Small Thermally Efficient Packages
4mm x 4mm 28-Pin TQFN
2mm x 2.5mm 20-Bump WLP
Ordering Information
PART
PIN-PACKAGE
MAX9788EWP+TG45 20 WLP
MAX9788ETI+
28 TQFN-EP*
+Denotes a lead-free package.
T = Tape and reel.
G45 indicates protective die coating.
*EP = Exposed pad.
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
Typical Application Circuit/Functional Diagram and Pin
Configurations appear at end of data sheet.
Simplified Block Diagram
2.7V TO 5.5V
VCC CPVDD
FB+
MAX9788
CIN
RFB+
RIN+
IN+ +
IN- -
CIN
RIN-
RFB-
FB-
CLASS G
OUTPUT
STAGE
OUT+
OUT-
CHARGE
PUMP
GND CPGND
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
14VP-P, Class G Ceramic Speaker Driver
Typical Operating Characteristics (continued)
(VCC = VCPVDD = VSHDN = 3.6V, VGND = VCPGND = 0V, RIN+ = RIN- = 10kΩ, RFB+ = RFB- = 10kΩ, RFS = 100kΩ, C1 = 4.7µF, C2 =
10µF, ZL = 1µF + 10Ω; load terminated between OUT+ and OUT-, unless otherwise stated; TA = TMIN to TMAX, unless otherwise noted.
Typical values are at TA = +25°C.) (Notes 1, 2)
POWER CONSUMPTION
vs. OUTPUT VOLTAGE
350
STARTUP WAVEFORM
MAX9788 toc11
SHUTDOWN WAVEFORM
MAX9788 toc12
300
SHDN
SHDN
250
5V/div
5V/div
200
150
100
50
0
0
VCC = 5V
fIN = 1kHz
1% THD+N
123456
OUTPUT VOLTAGE (VRMS)
7
OUT+ - OUT-
500mV/div
CLASS G OUTPUT WAVEFORM
MAX9788 toc13
10ms/div
OUT+ - OUT-
500mV/div
10ms/div
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
12
OUT+
5V/div
OUT-
5V/div
OUT+ - OUT-
10V/div
200μs/div
1% THD+N
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2.5
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
6.0
10
8
6
4
2
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
vs. OUTPUT VOLTAGE
70
60
50
40
30
20
10
0
0
VCC = 5V
fIN = 1kHz
1 2 3 4 5 67
OUTPUT VOLTAGE (VRMS)
_______________________________________________________________________________________ 5
5 Page 
14VP-P, Class G Ceramic Speaker Driver
Typical Application Circuit/Functional Diagram
SHDN
CONTROL
SIGNAL
VDD
20kΩ
14, 22
1 (B2) (D1, D5) 4 (A3)
SHDN VCC CPVDD
0.1μF
*
CIN
0.47μF
CIN
0.47μF
RIN+
10kΩ
RIN-
10kΩ
RFB+
10kΩ
RFB-
10kΩ
12 (B4) FB+
10 (B5) IN+
9 (A5) IN-
+
-
MAX9788
CLASS G
OUTPUT
STAGE
OUT+ 20 (D2)
RL
10Ω
OUT- 16 (D4)
7 (A4) FB-
GND CPGND C1N
18 (D3) 27 (A1) 26 (B1)
CHARGE
PUMP
C1P PVSS
3 (A2) 24 (C1)
FS 13 (C5)
SVSS
15, 21
(C2, C4)
RFS
100kΩ
( ) WLP PACKAGE
C1
4.7μF
C2
10μF
DEVICE SHOWN WITH AV = 12dB
*SYSTEM-LEVEL REQUIREMENT TYPICALLY 10μF
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MAX9788.PDF ] | |
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