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General Description
The OCA7210A is a 3W high efficiency filter-free
class-D audio power amplifier that requires only three
external components.
Features like 88% efficiency, −75-dB PSRR,
improved RF-rectification immunity, and 8 mm2 total
PCB area make the OCA7210A ideal for cellular
handsets. A fast start-up time of 1ms with minimal pop
makes the OCA7210A ideal for PDA applications.
In cellular handsets, the earpiece, speaker phone,
and melody ringer can each be driven by the
OCA7210A. The OCA7210A allows independent gain
while summing signals from separate sources, and has
a low 36μV noise floor, A-weighted.
OCA7210A built-in over current protection,
thermal protection and low voltage malfunction
prevention function, effectively protect chip in the
abnormal working conditions from being damaged.
OCA7210A provides 1.37mm * 1.37mm
WLCSP9 package, rated operating temperature
range is -40 to 85 .
Pin Configuration
WLCSP9
Top view
A1 A2 A3
IN+ GND VO-
B1 B2 B3
VDD PVDD GND
C1 C2 C3
IN- ShutdownVO+
OCA7210A
3Watts Class-D Audio Power Amplifier
Features
Maximum Battery Life and Minimum Heat
Efficiency With an 8-Speaker:
- 88% at 400 mW
- 80% at 100 mW
0.5-μA Shutdown Current
Only Three External Components
Optimized PWM Output Stage Eliminates LC Output
Filter
Internally Generated 500kHz Switching Frequency
Eliminates Capacitor and Resistor
Improved PSRR (−75 dB) and Wide Supply
Voltage (2.5 V to 5.5 V) Eliminates Need for a Voltage
Regulator
Fully Differential Design Reduces RF Rectification and
Eliminates Bypass Capacitor
Improved CMRR Eliminates Two Input Coupling
Capacitors
Packages: WLCSP9,1.37mm*1.37mm
Applications
Cellular Phone
MP3/PMP
GPS
Digital Photo Frame
Ordering Information
OCA7210AX X X
Package:
B: WLCSP9
Packing:
A: Tape & Reel
Temperature Grade:
D: -40~85
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Rev. 1.4 Feb .27, 2018
源于灿瑞 磁传天下